Page 1 Digital Power Meter IM 760401-01E 3rd Edition...
Page 2: Product Registration
Product Registration Thank you for purchasing YOKOGAWA products. YOKOGAWA provides registered users with a variety of information and services. Please allow us to serve you best by completing the product registration form accessible from our homepage. http://www.yokogawa.com/tm/ PIM 103-01E...
Page 3 Thank you for purchasing the YOKOGAWA WT210 or WT230 Digital Power Meter. This user’s manual contains useful information about the functions, operating procedures, and handling precautions of the instrument. To ensure correct use, please read this manual thoroughly before beginning operation.
Page 4: Functional Comparison Of The Wt210/Wt230 And Wt200/Wt110E/Wt130
Functional Comparison of the WT210/WT230 and WT200/WT110E/WT130 This section summarizes the functional differences between the WT210/WT230 and the conventional models WT200/WT110E/WT130. For more details on the functions and performance of the WT210/WT230, see the following sections. Item WT210/WT230 WT200/WT110E/WT130 (Conventional Models)
Page 5: Checking The Contents Of The Package
SUFFIX Made in Japan MODEL and SUFFIX codes Model SUFFIX Description 760401 ..........WT210 Single-phase model (single input element model) 760502 ..........WT230 Three-phase, three-wire model (two input element model) 760503 ..........WT230 Three-phase, four-wire model (three input element model) Supply Voltage ..........
Page 6: Standard Accessories
A1004JD For remote control and D/A output (provided only on options /DA4, DA12, and / CMP) 4. Current input B9317CY For the WT210 protective cover B9317GY For the WT230 (cover appropriate for the model provided) 5. Rubber feet for the A9088ZM Two pieces in one set.
Page 7 Q’ty Description 1. External sensor cable B9284LK 1 For connecting the current sensor input connector of the WT210/WT230, length 0.5 2. Measurement lead 758917 Two leads in one set, used with the separately sold 758922 or 758929 adapter, length 0.75 m, ratings 1000 V 3.
Page 8: Safety Precautions
The following general safety precautions must be observed during all phases of operation. If the instrument is used in a manner not specified in this manual, the protection provided by the instrument may be impaired. Yokogawa Electric Corporation assumes no liability for the customer’s failure to comply with these requirements.
Page 9 • Power Supply Before connecting the power cord, ensure that the source voltage matches the rated supply voltage of the WT210/WT230 and that it is within the maximum rated voltage of the provided power cord. • Power Cord and Plug To prevent the possibility of electric shock or fire, be sure to use the power cord supplied by YOKOGAWA.
Page 10: Structure Of The Manual
WT210/WT230 to a PC using the GP-IB interface. Chapter 11 Serial Interface (Option) Describes how to control the WT210/WT230 from a controller such as a PC and how to retrieve measured/computed data on the WT210/WT230 to a controller using the serial (RS-232-C) interface.
Page 11: Conventions Used In This Manual
Conventions Used in This Manual Symbol Markings The following markings are used in this manual. Improper handling or use can lead to injury to the user or damage to the instrument. This symbol appears on the instrument to indicate that the user must refer to the user’s manual for special instructions.
Page 12 Conventions Used in This Manual Symbols Used on Pages Describing Operating Procedures The following symbols are used to distinguish the contents of the explanations. Indicates the keys and indicators related to the settings. Keys The procedure is explained using a flow diagram. For the meaning Procedure of each operation, see the example below.
Page 13: Table Of Contents
Contents Functional Comparison of the WT210/WT230 and WT200/WT110E/WT130 ......... ii Checking the Contents of the Package ..................iii Safety Precautions ......................... vi Structure of the Manual ........................ viii Conventions Used in This Manual ....................ix Startup Guide Wiring the Circuit ......................... S-2 Selecting the Wiring System .......................
Page 14 Content 4.12 Computing the Average Active Power during Integration ..........4-29 4.13 Selecting the Number of Displayed Digits and the Display Update Rate ....... 4-31 4.14 Selecting the Crest Factor ..................... 4-33 Chapter 5 Displaying Measurement Results and Computation Results Displaying Voltage, Current and Active Power ..............
Page 15 Content Chapter 11 Serial Interface (Option) 11.1 Serial Interface Functions and Specifications ..............11-1 11.2 Connecting the Interface Cable ..................11-3 11.3 Setting the Mode, Handshaking Method, Data Format and Baud Rate ......11-5 11.4 Format and Commands of Output Data (before the IEEE488.2 Standard) ....11-8 Chapter 12 Initializing Setup Parameters, Zero-Level Compensation, and Key Lock 12.1...
Page 16 Content 14.4 Status Report ....................... 14-44 14.4.1 Overview of the Status Report ............... 14-44 14.4.2 Status Byte ..................... 14-45 14.4.3 Standard Event Register ................14-46 14.4.4 Extended Event Register ................14-47 14.4.5 Output Queue and Error Queue ..............14-48 14.5 Before Programming ....................
Page 17: Startup Guide
Startup Guide Startup Guide This guide covers an example of measuring the “inverter efficiency” and explains the setup procedure from wiring the circuit to performing measurements and computation. For a detailed description of the setup procedure, see the reference section indicated at the beginning of each setup item.
Page 18: Wiring The Circuit
Wiring the Circuit <<For details, see section 3.3.>> To prevent the possibility of electric shock and damage to the instrument, follow the warnings below. WARNING • Employ protective earth ground before wiring measurement cables. The power cord that comes with the instrument is a three-pin type power cord. Connect the power cord to a properly grounded three-pin outlet.
Page 19: Installing The Wt230
Wiring the Circuit Below is a wiring example of a circuit used to measure the efficiency of an inverter using the WT230 Digital Power Meter (760503, three-phase, four-wire model). To compute the efficiency on the WT230 (760503, three-phase, four-wire model) when the primary side of the inverter is a single-phase, two-wire system and the secondary side is a three-phase, three-wire system, wiring must be furnished to input elements 1 and 3 using a three-phase, three-wire system.
Page 20: Connecting The Wt230 Power Supply
Wiring the Circuit Connecting the WT230 Power Supply <<For details, see section 3.5.>> Check that the power switch on the WT230 (760503, three-phase, four-wire model) is OFF. Connect the power cord plug to the power connector on the rear panel of the WT230.
Page 21: Wiring The Circuit On The Primary Side Of The Inverter
Wiring the Circuit Wiring the Circuit on the Primary Side of the Inverter (Wiring a Single-Phase, Two-Wire System) <<For details, see section 3.7.>> Connect the voltage and current input terminals of input element 2 on the rear panel of the WT230 (760503, three-phase, four-wire model) and the current measurement circuit and voltage measurement circuit on the primary side of the inverter.
Page 22: Wiring The Circuit On The Secondary Side Of The Inverter
Wiring the Circuit Wiring the Circuit on the Secondary Side of the Inverter (Wiring a Three-Phase, Three-Wire System) Connect the voltage and current input terminals of input elements 1 and 3 on the rear panel of the WT230 (760503) and the current measurement circuit and voltage measurement circuit of the secondary side of the inverter and the motor.
Page 23 Wiring the Circuit Attach the current input protection cover. Before attaching the current input protection cover, check that the input terminal screws are securely fastened. WT230 Current input protective cover Inverter Moter To SOURCE IM 760401-01E...
Page 24: Selecting The Wiring System
Selecting the Wiring System <<For details, see section 3.10.>> After wiring the circuit, select the wiring circuit. Select the wiring system to match the circuit under measurement that is actually wired. When input element Σ is selected, the average voltage or current of each input element that corresponds to the selected wiring system and the sum of powers of each input element are displayed.
Page 25: Selecting The Measurement Range
Selecting the Measurement Range <<For details, see section 4.4.>> After selecting the writing system, select the measurement range (voltage and current ranges). When you select and confirm the measurement range, the measured values are indicated on the WT230 displays. Selecting the Voltage Range AUTO indicator for current range RANGE AUTO...
Page 26: Selecting The Current Range
Selecting the Measurement Range Selecting the Current Range AUTO indicator for current range RANGE AUTO AUTO VOLTAGE CURRENT HOLD MODE MAX HOLD TRIG FUNCTION ELEMENT TIME ENTER 1 2 3 INTEGRATOR RANGE FUNCTION ELEMENT START STOP RESET HARMONICS MEMORY INTEG SET REMOTE 1 2 3 LOCAL...
Page 27: Turning On The Power To The Circuit Under Measurement
Selecting the Measurement Range Turning ON the Power to the Circuit under Measurement Check the following items before turning on the power to the circuit under measurement. • The power supply of the WT230 is connected. • Input terminal screws are securely fastened. •...
Page 28: Displaying Voltage, Current, And Active Power
Displaying Voltage, Current, and Active Power <<For details, see section 5.1.>> After selecting the measurement range (voltage and current ranges), select the measured items to be displayed in each display. Displaying the Voltage on the Primary Side of the Inverter on Display A Carry out the following procedure to display the voltage of the primary side of the inverter on display A.
Page 29: Displaying The Current On The Primary Side Of The Inverter On Display B
Displaying Voltage, Current, and Active Power Displaying the Current on the Primary Side of the Inverter on Display B Carry out the following procedure to display the current of the primary side of the inverter on display B. Function indicator Element indicator RANGE AUTO...
Page 30: Displaying The Active Power On The Primary Side Of The Inverter On Display C
Displaying Voltage, Current, and Active Power Displaying the Active Power on the Primary Side of the Inverter on Display C Carry out the following procedure to display the active power of the primary side of the inverter on display C. Function indicator Element indicator RANGE...
Page 31: Displaying The Voltage Of The Secondary Side Of The Inverter On Display A
Displaying Voltage, Current, and Active Power ELEMENT Press of display C to select input element 2. ELEMENT Each time is pressed the element indicator character of display C illuminates in the order shown below. The wiring system of the circuit on the primary side of the inverter is single-phase, two-wire, and the circuit is connected to input element 2 of the WT230.
Page 32: Displaying The Current On The Secondary Side Of The Inverter On Display B
Displaying Voltage, Current, and Active Power Tips There are cases when we wish to measure, as a voltage on the secondary side of the inverter, the converted rms voltage (rectified mean value calibrated to the rms value) that is derived by summing the absolute values of the voltage over a single period, dividing the result by the time of one period, and making a conversion.
Page 33: Displaying The Active Power On The Secondary Side Of The Inverter On Display C
Tips • The WT210/WT230 is equipped with an input filter function for eliminating noise on the measured signal and more accurately measuring the frequency of the measured signal. For the setup procedure, see section 4.3, “Turning ON/OFF the Input Filter.”...
Page 34: Displaying The Efficiency
Displaying the Efficiency After wiring the circuit, selecting the wiring system, and selecting the measurement range (voltage and current ranges), set the efficiency computation. The computed results of efficiency can be shown on display C. Setting the Efficiency Computation <<For details, see section 4.9.>> RANGE AUTO AUTO...
Page 35: Displaying The Efficiency
Displaying the Efficiency The following flow chart illustrates steps 1 to 5. In the procedural explanation in chapter 4 and beyond, similar flow diagrams are used. Select the four arithmetic operation function ( Display C ) SETUP ( Display C ) ENTER ENTER End of setting...
Page 36 Displaying the Efficiency Displaying the Efficiency <<For details, see section 5.5.>> Displaying Efficiency on display C FUNCTION Press on display C to show (M) on display C. If (EFFI) is selected in step 4 of page S-18, efficiency is displayed. The efficiency value is displayed as a percentage.
Page 37: Confirming The Displayed Efficiency
Displaying the Efficiency Confirming the Displayed Efficiency To confirm the efficiency value that is shown, we will display the active power on the primary side of the inverter (power supplied by the source) on display A and the active power on the secondary side of the inverter (power consumed by the load) on display B.
Page 38: Chapter 1 Functional Overview And Digital Display
(For WT210, Detector option) EEPROM Harmonics D/A Output EEPROM (Option) (Option) Comparator (Option) Input section ( input element 2) Input section ( input element 3) WT210’s Current input section Current input section Zero Cross Detector Current Over Detector IM 760401-01E...
Page 39 This also enables remote control via communications outputs. The WT210 equipped with two shunt resistors, one for minute currents and another for large currents,.
Page 40: Functions
Input Functions Voltage and Current Input Sections The WT210/WT230 is a digital power meter that can measure the RMS value of voltage or current, or active power by applying voltage and current signals to the voltage and current input sections, respectively. From the measured values of voltage, current, and active power, power elements such as apparent power, reactive power, power factor, and phase angle can be determined.
Page 41 DC analog voltage with full scale of ±5 V and outputs the voltage. Output items of up to 12 output channels (4 channels on WT210) can be selected.
Page 42 This function initializes the setup parameters to factory default. Zero Level Compensation Zero level compensation refers to creating a zero input condition inside the WT210/ WT230 and setting the level at that point as the zero level. Zero level compensation must be performed in order to satisfy the specifications of this instrument.
Page 43: Digital Numbers And Characters And Initial Menus
× ÷ Initial Menus Each function of the WT210/WT230 is set using a menu that appears on the display. The initial menu that appears when the operation keys are pressed are shown below. Voltage Range Setting When the crest factor is set to 6...
Page 44 1.3 Digital Numbers and Characters and Initial Menus When the crest factor is set to 6 For option /EX1 For option /EX2 (Display C) (Display C) (Display C) CURRENT Filter/Scaling/Averaging/External Sensor Input/Initializing set-up parameters (Display C) (Set the line filter) SETUP (Set the frequency filter) (Set averaging)
Page 45 1.3 Digital Numbers and Characters and Initial Menus Setting Output (Display C) SETUP (Set the communication, plotter, and printer output items) SHIFT OUTPUT (Execute plotter or printer output) (Set the D/A output) (Set the comparator and relay output) Setting Communication Interface (GP-IB) (Display C) LOCAL (Set addressable mode)
Page 46: Chapter 2 Names And Functions Of Parts And Auto Range Monitor, Overrange
Chapter 2 Names and Functions of Parts and Auto Range Monitor, Overrange, and Error Displays Front Panel, Rear Panel, and Top View Front Panel WT210 (model: 760401) WT230 (model: 760502, 760503) 7-segment display 7-segment display Function/Unit/Element display Function/Unit display Keys (Section 2.2)
Page 47: Operation Keys And Functions/Element Display
Operation Keys and Functions/Element Display Operation Keys and Function Displays on the WT210 (model: 760401) Operation status indicator Indicates data updating, voltage/current range check, and measurement mode status. (Sections 2.3, 4.1, and 4.3) VOLTAGE CURRENT SHIFT MAX HOLD Displays the voltage range setup menu. (Section 4.4) Turns ON/OFF the MAX hold function.
Page 48 2.2 Operation Keys and Functions/Element Display Operation Keys and Function Displays on the WT230 (model: 760502, 760503) Operation status indicator Indicates data updating, voltage/current range check, and measurement mode status. (Sections 2.1, 4.1, and 4.13) VOLTAGE CURRENT SHIFT MAX HOLD Displays the voltage range setup menu.
Page 49: Auto Range Monitor, Overrange, And Error Displays During Measurement
If the computed value overflows during the computation process, it is indicated as follows: Auto Range Monitor The indicator illuminates when the input signal meets the conditions for auto range switching. For details on the auto range function, see section 4.4. WT210 indicator WT230 indicator CHECK RANGE CHECK RANGE VOLTAGE...
Page 50: Chapter 3 Before Starting Measurements
If these symptoms occur, immediately turn OFF the power and unplug the power cord. In addition, turn OFF the power to the DUT that is connected to the input terminal. Then, contact your nearest YOKOGAWA dealer.
Page 51: Installing The Instrument
Desktop Place the instrument on a flat, even surface as shown in the figure below. • WT210 (model: 760401) When using the handle for installation, check that the handle is in one of the fixed positions. To change the fixed position of the handle, pull the handle outward along the rotational axis approximately 2 to 3 mm and slowly move the handle.
Page 52 751534-J3 • Installation Procedure Remove the handle. The handle on the WT210 is removed by rotating the handle to the handle rest position 8 (see the installation position figure on the previous page) and pulling out along the rotation axis approximately 10 mm.
Page 53: Wiring Precautions
Wiring Precautions To prevent the possibility of electric shock and damage to the instrument, follow the warnings below. WARNING • Employ protective earth ground before connecting measurement cables. The power cord that comes with the instrument is a three-pin type power cord. Connect the power cord to a properly grounded three-pin outlet.
Page 54 Peak value of 2.8 kV or RMS value of 2.0 kV, whichever is less. Current Input 5 mA to 200 mA range (2.5 mA to 100 mA range if the crest factor is set to 6) (WT210 only) Peak value of 150 A or RMS value of 100 A, whichever is less.
Page 55 3.3 Wiring Precautions CAUTION Use measurement cables that have sufficient margin in withstand voltage and current against the signal being measured. The cables must also have insulation resistance that is appropriate for the ratings. Example: When making measurements on a current of 20 A, use copper wires that have a conductive cross-sectional area of 4 mm Connecting to the Input Terminal •...
Page 56: For Making Accurate Measurements
± ± ± Input terminal ± (Element) WT210/WT230 V: VOLTAGE terminal C: CURRENT terminal As a reference, the following figure shows the relationship between the voltage and current that cause 0.1% or 0.01% effect on the measurement accuracy. 0.1% effect 0.01% effect...
Page 57: Connecting The Power Supply
Maximum power consumption WT210: 35 VA, WT230: 55 VA * The WT210/WT230 can use a 100-V or a 200-V system for the power supply. The maximum rated voltage of the power cord varies depending on its type. Check that the voltage supplied to the WT210/WT230 is less than or equal to the maximum rated voltage of the provided power cord (see page iii) before using it.
Page 58: Turning On/Off The Power Switch And Opening Message
If the test result is normal, an opening message as shown on the next page appears, and the WT210/WT230 is ready to make measurements. If an error code remains on the display after the test program terminates, the WT210/ WT230 will not operate properly. Turn OFF the power switch immediately and contact your nearest YOKOGAWA dealer.
Page 59 Display C Power switch (POWER) ON No display All LEDs Turn OFF illuminate (For 760502 (Model display) No display (For WT210) The display varies depending on the specified (Version display) No display specifications and options. (/EX1 and /EX2 external sensor option)
Page 60: Directly Wiring The Circuit Under Measurement
WARNING When measuring current by directly applying the current to flow through the current input terminals of the WT210/WT230, the voltage of the object to be measured appears at the external sensor input connector. To prevent the possibility of electric shock, remove the cable for measurements from the external sensor.
Page 61 3.7 Directly Wiring the Circuit under Measurement Wiring example of a three-phase, three-wire system (3P3W) ... Can be applied to models 760502, and 760503. ± Source Load U(R) V(S) U(R) W(T) ± Source Load ± ± W(T) V(S) ± ± ±...
Page 62: Using An External Pt Or Ct To Wire The Circuit Under Measurement
Using an External PT or CT to Wire the Circuit under Measurement WARNING When using an external CT, do not allow the secondary side of the CT to become an open circuit while current is flowing through the primary side. Otherwise, high voltage will appear at the secondary side of the CT, making it extremely dangerous.
Page 63 3.8 Using an External PT or CT to Wire the Circuit under Measurement Note • You can use the scaling function to directly read the measured values on the display. For the procedures, see section 4.5, “Setting the Scaling Constant when Using an External PT or CT.” •...
Page 64: Using An External Sensor To Wire The Circuit Under Measurement
• Use connectors with safety terminals that cover the conductive parts for connecting to the external sensor input terminals of the WT210/WT230. If the connector comes loose, voltage appears at the conductive parts making them extremely dangerous.
Page 65 3.9 Using an External Sensor to Wire the Circuit under Measurement • For a shunt-type current sensor, connect it to the power earth ground side as shown in the figure below. If you have to connect the sensor to the non-earth side, use a wire that is thicker than AWG18 (conductive cross-sectional area of approx.
Page 66 20 A (10 A if the crest factor is set to 6). The range of the external sensor input of the WT210/WT230 comes in two types, one for 2.5, 5, and 10 V (1.25/2.5/5 V if the crest factor is set to 6) and another for 50, 100, and 200 mV (25/50/ 100 mV if the crest factor is set to 6).
Page 67 3.9 Using an External Sensor to Wire the Circuit under Measurement Wiring example of a three-phase, three-wire system (3P3W) when using an external shunt ... Can be applied to models 760502, and 760503. Source Load U(R) OUT L OUT H V(S) W(T) OUT H...
Page 68: Selecting The Wiring System (Applies Only To The Wt230)
STORE RECALL HARMONICS KEY LOCK The explanation given in this section uses WT230 as an example. For the differences between the WT210 and the WT230, see section 2.2, “Operation Keys and Functions/Element Display.” Explanation Wiring System Press the WIRING key to select the wiring system. The selectable wiring systems vary depending on the model.
Page 69: Chapter 4 Setting Measurement Conditions And Measurement Range
LINE FREQ STORE RECALL HARMONICS KEY LOCK The explanation given in this section uses WT230 as an example. For the differences between the WT210 and the WT230, see section 2.2, “Operation Keys and Functions/Element Display.” Procedure VOLTAGE VOLTAGE VOLTAGE SHIFT...
Page 70 4.1 Selecting the Measurement Mode Typical Waveform Types and Differences in Measured Values between Measurement Modes The WT210/WT230 does not support the mean value measurement mode shown in the table below. Measurement Rectified mean Retified Linear value calibrated mode value...
Page 71: Selecting The Measurement Synchronization Source
HARMONICS KEY LOCK The explanation given in this section uses WT230 as an example. For the differences between the WT210 and the WT230, see section 2.2, “Operation Keys and Functions/Element Display.” Procedure • Operate the instrument by following the thick lines in the menu below.
Page 72 4.2 Selecting the Measurement Synchronization Source Explanation Function used to select the measurement synchronization source The instrument determines the measured value by averaging the sampled data (averaging process) over the period synchronized to the input signal period. The input signal period is detected from the voltage and current signals and you can select which signal period to use to perform the averaging process.
Page 73: Turning On/Off The Input Filter
HARMONICS KEY LOCK The explanation given in this section uses WT230 as an example. For the differences between the WT210 and the WT230, see section 2.2, “Operation Keys and Functions/Element Display.” Procedure • Operate the instrument by following the thick lines in the menu below.
Page 74 Frequency Filter This filter is inserted only into the frequency measurement circuit. The cutoff frequency is 500 Hz. Since the WT210/230 is making measurements in sync with the input signal, the frequency of the input signal must be measured correctly.
Page 75: Selecting The Measurement Range When Using Direct Input
HARMONICS KEY LOCK The explanation given in this section uses WT230 as an example. For the differences between the WT210 and the WT230, see section 2.2, “Operation Keys and Functions/Element Display.” Procedure • Operate the instrument by following the thick lines in the menu below.
Page 76 • When the crest factor is set to 6: 10, 5, 2.5, 1, 0.5, or 0.25 A (100 mA, 50 mA, 25 mA, 10 mA, 5 mA, and 2.5 mA are also selectable on the WT210) • Auto range: Auto The measuring range is adjusted automatically according to the input voltage or current as follows.
Page 77 4.4 Selecting the Measurement Range When Using Direct Input • The maximum display is 99999 (when the number of displayed digits is set to 5). • When the result of “voltage range × current range” exceeds 1000 W, the unit on the display will change to “kW”;...
Page 78 4.4 Selecting the Measurement Range When Using Direct Input On the WT210 • When the crest factor is set to 3 Voltage Current Range Range (V) 500.00 mA 1.0000 A 2.0000 A 5.0000 A 10.000 A 20.000 A 15.000 7.5000 W 15.000 W...
Page 79: Setting The Scaling Value When External Pt/Ct Is Used
HARMONICS KEY LOCK The explanation given in this section uses WT230 as an example. For the differences between the WT210 and the WT230, see section 2.2, “Operation Keys and Functions/Element Display.” Procedure • Operate the instrument by following the thick lines in the menu below.
Page 80 • F: Sets the power value on display C In case of the WT210, pressing the ENTER key after setting P, C and F respectively will end this scaling setting. In case of the WT230, selecting End at the input element menu will end this scaling setting.
Page 81 4.5 Setting the Scaling Value When External PT/CT is Used Turning Scaling ON/OFF Select the scaling menu once again after having set the scaling constant. The initial value is oFF. • on: Selecting on and pressing the ENTER key will start scaling and the SCALING indicator will light.
Page 82: Selecting The Measurement Range And Setting The Scaling Constant When External Sensor Is Used (Option)
HARMONICS KEY LOCK The explanation given in this section uses WT230 as an example. For the differences between the WT210 and the WT230, see section 2.2, “Operation Keys and Functions/Element Display.” Procedure • Operate the instrument by following the thick lines in the menu below.
Page 83 Auto, 10, 5, 2.5, 1, 0.5, 0.25, E 100, E 50, E 25 E 5, E 2.5, E 1.25 The menu above is for the WT230. The WT210 displays mA range followed by the external sensor range (mV or V unit). Explanation...
Page 84 The procedure to set the scaling constant depends on the setting format (previous setting). The setting ranges from 0.001 to 9999. The initial value is 50.00. In case of the WT210, the scaling constant is set at display C. • When ALL is selected: The scaling constant set at display C will be applied to all elements together.
Page 85: Using The Averaging Function
HARMONICS KEY LOCK The explanation given in this section uses WT230 as an example. For the differences between the WT210 and the WT230, see section 2.2, “Operation Keys and Functions/Element Display.” Procedure • Operate the instrument by following the thick lines in the menu below.
Page 86 4.7 Using the Averaging Function Setting Averaging ON/OFF Set the averaging function ( Display C ) SETUP ( Display C ) ENTER ENTER End of setting Explanation About the Averaging Function This function performs exponential averaging or moving averaging on measurement values.
Page 87 4.7 Using the Averaging Function Setting the Averaging Sample Number/Attenuation Constant The following selections are available. The initial value is “8”. 8, 16, 32, or 64 Setting Averaging ON/OFF Select the averaging menu once again after having set the averaging values. The initial value is oFF.
Page 88: Using The Max Hold Function
FREQ STORE RECALL HARMONICS KEY LOCK The explanation given in this section uses WT230 as an example. For the differences between the WT210 and the WT230, see section 2.2, “Operation Keys and Functions/Element Display.” Procedure CURRENT CURRENT SHIFT MAX HOLD...
Page 89: Computing The Efficiency (Applies To Wt230 Only)
HARMONICS KEY LOCK The explanation given in this section uses WT230 as an example. For the differences between the WT210 and the WT230, see section 2.2, “Operation Keys and Functions/Element Display.” Procedure • Operate the instrument by following the thick lines in the menu below.
Page 90 4.9 Computing the Efficiency (Applies to WT230 Only) Explanation The efficiency of the device can be computed and shown on display C. When displaying the efficiency, “ ” is displayed at the front of the value. Computing Equation of Efficiency •...
Page 91: Computing The Crest Factor
HARMONICS KEY LOCK The explanation given in this section uses WT230 as an example. For the differences between the WT210 and the WT230, see section 2.2, “Operation Keys and Functions/Element Display.” Procedure • Operate the instrument by following the thick lines in the menu below.
Page 92 Explanation Crest factor computation The crest factor is determined by peak value/rms value. The WT210/WT230 can compute the crest factors for voltage and current and show them on display C. “ ” is displayed at the front of the value when the crest factor is being displayed.
Page 93: Performing Four Arithmetical Operation
HARMONICS KEY LOCK The explanation given in this section uses WT230 as an example. For the differences between the WT210 and the WT230, see section 2.2, “Operation Keys and Functions/Element Display.” Procedure • Operate the instrument by following the thick lines in the menu below.
Page 94 4.11 Performing Four Arithmetical Operation Explanation Four Arithmetical Operations Function The following computation results can be shown on display C. “ ” is displayed at the front of the value when the computation results are being displayed. : A + B : A −...
Page 95 4.11 Performing Four Arithmetical Operation Computation example 2: Display A Display B Display C Wiring method ΣW (= W1 + W3) W2 ΣW – W2 3P3W Inverter Computation example 3: Display A Display B Display C Wiring method ΣW (= W1 + W3) W2 – ΣW 3P3W Inverter : Displays the result of display A ×...
Page 96 4.11 Performing Four Arithmetical Operation : Displays the result of display A ÷ (display B) When computing impedance (Z), resistance (R), and reactance (X) Computation example : Display A Display B Display C Wiring method A1rms |Z| = (A1rms) A1rms (A1rms) Var1 Var1...
Page 97: Computing The Average Active Power During Integration
HARMONICS KEY LOCK The explanation given in this section uses WT230 as an example. For the differences between the WT210 and the WT230, see section 2.2, “Operation Keys and Functions/Element Display.” Procedure • Operate the instrument by following the thick lines in the menu below.
Page 98 4.12 Computing the Average Active Power during Integration Explanation Function Used to Compute the Average Active Power during Integration This function computes the average active power within the integration period. It is derived by dividing the watt hour (integrated active power) by the elapsed time of integration.
Page 99: Selecting The Number Of Displayed Digits And The Display Update Rate
HARMONICS KEY LOCK The explanation given in this section uses WT230 as an example. For the differences between the WT210 and the WT230, see section 2.2, “Operation Keys and Functions/Element Display.” Procedure • Operate the instrument by following the thick lines in the menu below.
Page 100 4.13 Selecting the Number of Displayed Digits and the Display Update Rate Selecting the Display Update Rate Select the display update rate ( Display C ) SETUP ( Display C ) ENTER ENTER End of setting Explanation Selecting the Number of Displayed Digits You can select the maximum number of displayed digits for V (voltage), A (current), W (active power), VA (apparent power), var (reactive power), PF (power factor), VHz (voltage frequency), AHz (current frequency), and harmonic measurement values...
Page 101: Selecting The Crest Factor
HARMONICS KEY LOCK The explanation given in this section uses WT230 as an example. For the differences between the WT210 and the WT230, see section 2.2, “Operation Keys and Functions/Element Display.” Procedure • Operate the instrument by following the thick lines in the menu below.
Page 102 4.14 Selecting the Crest Factor Explanation Selecting the Crest Factor The crest factor is a ratio of the amplitude with respect to the rms value. You can select 3 or 6. Note • If the crest factor is entered using the ENTER key, the voltage range and current range are set to the maximum range.
Page 103: Chapter 5 Displaying Measurement Results And Computation Results
RECALL HARMONICS KEY LOCK The explanation given in this section uses WT230 as an example. For the differences between the WT210 and the WT230, see section 2.2, “Operation Keys and Functions/Element Display.” Procedure 1. Selecting the Display Function Select either V (voltage), A (current) or W (power) by pressing the FUNCTION key.
Page 104 WT210 and WT230) Up to peak current of 100 A or RMS value of 30 A, whichever is less. • External sensor input (common to WT210 and WT230) Peak value of up to five times the measurement range. Maximum Reading, Unit, and Unit Prefix •...
Page 105: Displaying Apparent Power, Reactive Power And Power Factor
RECALL HARMONICS KEY LOCK The explanation given in this section uses WT230 as an example. For the differences between the WT210 and the WT230, see section 2.2, “Operation Keys and Functions/Element Display.” Procedure 1. Selecting the Display Function Select either VA (apparant power), var (reactive power), or PF (power factor) by pressing the FUNCTION key of display A or B.
Page 106: Displaying The Phase Angle
RECALL HARMONICS KEY LOCK The explanation given in this section uses WT230 as an example. For the differences between the WT210 and the WT230, see section 2.2, “Operation Keys and Functions/Element Display.” Procedure 1. Selecting the Display Function Select deg (phase angle) by pressing the FUNCTION key of display B.
Page 107: Displaying The Frequency
RECALL HARMONICS KEY LOCK The explanation given in this section uses WT230 as an example. For the differences between the WT210 and the WT230, see section 2.2, “Operation Keys and Functions/Element Display.” Procedure 1. Selecting the Display Function Select either V Hz (voltage frequency) or A Hz (current frequency) by pressing the FUNCTION key of display C.
Page 108 5.4 Displaying the Frequency Selecting the Display Function The following selections are available. • V Hz: voltage frequency will be displayed • A Hz: current frequency will be displayed Selecting the Input Element • 1/2/3: Displays the measurement values of element 1/2/3 •...
Page 109: Displaying Efficiency (Wt230 Only), Crest Factor, Four Arithmetic Operation Value, Average Active Power, And Peak Value
STORE RECALL HARMONICS KEY LOCK The explanation given in this section uses WT230 as an example. For the differences between the WT210 and the WT230, see section 2.2, “Operation Keys and Functions/Element Display.” Procedure Selecting the display Function Select either...
Page 110: Integration
5.5 Displaying Efficiency (WT230 Only), Crest Factor, Four Arithmetic Operation Value, Average Active Power, and Peak Value Explanation Displaying the Peak Value is displayed at the front of display C. The peak value of voltage is displayed when the unit display is V; the peak value of current is displayed when the unit display is A. •...
Page 111: Chapter 6 Integration
Chapter 6 Integration Integrator Functions Active power integration and current integration can be carried out. All measurement values (and computed values) can be displayed, even when integration is in progress, except for the integrated values (watt hour or ampere hour) and elapsed integration time. Since integrated values of negative polarity can be also displayed, the consumed watt hour (ampere hour) value of the positive side and the watt hour value returning to the power supply of the negative side (ampere hour: only when the measurement mode is DC), can be displayed seperately.
Page 112 6.1 Integrator Functions Continous Integration Mode (Repeat Integration) • Integration starts: • after having pressed the START key; • when the elapsed integration time is reached to preset time, the integrated value and elapsed integration time are reset automatically and restarted immediately. •...
Page 113 6.1 Integrator Functions Display Resolution during Integration The display resolution of integrated values is normally 99999 counts (counts up to 999999 only when the unit is MWh or MAh). When the integrated value reaches 100000 counts, the decimal point shifts automatically. For example, if 0.0001 mWh is added to 9.9999 mWh, the display shows “10.000 mWh.”...
Page 114: Setting Integration Mode And Integration Timer
HARMONICS KEY LOCK The explanation given in this section uses WT230 as an example. For the differences between the WT210 and the WT230, see section 2.2, “Operation Keys and Functions/Element Display.” Procedure • Operate the instrument by following the thick lines in the menu below.
Page 115 6.2 Setting Integration Mode and Integration Timer Explanation Selecting the Integration Mode The following selections are available. The initial value is nor. • nor: Select this for manual or standard integration mode. Depending on the integration timer, this instrument will automatically decide the appropriate mode. •...
Page 116: Displaying Integrated Values
RECALL HARMONICS KEY LOCK The explanation given in this section uses WT230 as an example. For the differences between the WT210 and the WT230, see section 2.2, “Operation Keys and Functions/Element Display.” Procedure 1. Selecting the Display Function Pressing the FUNCTION key on display A will select TIME (elapsed integration time).
Page 117 6.3 Displaying Integrated Values 5. Cancelling HOLD, and Updating the Integration Continuing from step 4, press the HOLD key once more, or press the SHIFT key followed by the HOLD (TRIG) key. The HOLD indicator will extinguish and the displayed value will be updated. HOLD TRIG 6.
Page 118 The maximum number of digits used to display the elapsed time of integration is nine (when the hour, minute, and second digits are added together). The WT210/WT230 displays the elapsed time of integration on display A. However, because the maximum number of digits that can be displayed on display A is five, all the digits of the elapsed time of integration may not be displayed in certain cases.
Page 119: Precautions Regarding Use Of Integrator Function
Precautions Regarding Use of Integrator Function Relation between s and the START/STOP key When the HOLD key is pressed, the display and communication output of the integrated results is being held while integration continues. The relation between this hold function and the START/STOP key is as follows.
Page 120 6.4 Precautions Regarding Use of Integrator Function Backup During Power Failures • If there is a power failure while integration is in progress, the integrated value and integration elapsed time will be backed up. When the power is restored, the display will show the integrated results up to the time the power failure occurred.
Page 121 6.4 Precautions Regarding Use of Integrator Function Integration Computation when the Measured Value Exceeds Measurement Limits Integration Computation When the Measured Value Exceeds the Measurement Limit When the instantaneous voltage or current of the sampled data exceeds approx. 333% (approximately 666% if the crest factor is set to 6) of the measurement range, the value is considered to be the value corresponding to approx.
Page 122: Chapter 7 Harmonic Measurement Function (Option)
After having set the harmonic measurement function to ON, the harmonic component of voltage, current, or active power, will be mesured and displayed for one of the input elements (target element, not applicable for the WT210). Depending on the setting of the display function, the display changes as follows.
Page 123 7.1 Harmonic Measurement Function Auto Range Operation • Range Up When the measured value of voltage or current (V or A) exceeds 200% of the rated range or when the peak value (instantaneous voltage or current value that is sampled) exceeds approximately 300% (approximately 600% if the crest factor is set to 6) of the rated range, the range is increased the next time the measured value is updated.
Page 124 7.1 Harmonic Measurement Function Overrange Dislay The overrange display (being the same as for normal measurement; see section 2.3) will appear when all rms values of the 1st to 50th order reach the following value: • Greater than equal to 140% of the rated range for voltage measurement range 600 V or current measurement range 20 A Greater than equal to 140% of the rated range for voltage measurement range 300 V or current measurement range 10 A if the crest factor is set to 6...
Page 125: Setting The Target Element, Pll Source And Harmonic Distortion Method
HARMONICS KEY LOCK The explanation given in this section uses WT230 as an example. For the differences between the WT210 and the WT230, see section 2.2, “Operation Keys and Functions/Element Display.” Procedure • Operate the instrument by following the thick lines in the menu below.
Page 126 Setting the Target Element Only one input element should be set for harmonic measurement. The initial value is EL1. At the WT210 the element setting menu does not appear. • EL1: Element 1 is used for measurement; • EL2: Element 2 is used for measurement; For 760502, this menu is not shown;...
Page 127: Turning On/Off The Harmonic Measurement Function
HARMONICS KEY LOCK The explanation given in this section uses WT230 as an example. For the differences between the WT210 and the WT230, see section 2.2, “Operation Keys and Functions/Element Display.” Procedure • Operate the instrument by following the thick lines in the menu below.
Page 128: Setting The Harmonic Order And Displaying The Measured Harmonic Value
HARMONICS KEY LOCK The explanation given in this section uses WT230 as an example. For the differences between the WT210 and the WT230, see section 2.2, “Operation Keys and Functions/Element Display.” Procedure The following operations assume that the harmonic measurement function is turned ON.
Page 129 7.4 Setting the Harmonic Order and Displaying the Measured Harmonic Value Displaying the Measured Harmonic Values Depending on the setting of display function of display B and C, the measured data of items will appear on the display as follows. In the following explanation a maximum of 50 analysis orders is assumed.
Page 130 7.4 Setting the Harmonic Order and Displaying the Measured Harmonic Value • Display C • V: Shows each rms (computed) value of the 1st to 50th harmonic component of the voltage; • A: Shows each rms (computed) value of the 1st to 50th harmonic component of the current;...
Page 131: Chapter 8 Store/Recall Function Of Measured/Computed Data And Setup
HARMONICS KEY LOCK The explanation given in this section uses WT230 as an example. For the differences between the WT210 and the WT230, see section 2.2, “Operation Keys and Functions/Element Display.” Procedure • Operate the instrument by following the thick lines in the menu below.
Page 132 8.1 Storing/Recalling Measured/Computed Data Setting the Recall Interval for Measured/Computed Data Select the recall function (Display C) STOP (Display C) SHIFT MEMORY Set the Interval ENTER (Display C) hour min sec ENTER ENTER End of setting Up/down Shift cursor SHIFT Recalling Measured/Computed Data ON/OFF Select the recall function (Display C)
Page 133 8.1 Storing/Recalling Measured/Comupted Data Setting the Storage Interval Sets the time during which storage will be carried out. When starting storage, the recalling interval (see next page) is also set to the same value as the specified store interval. • Setting range: 00.00.00 (0 hrs, 00 min, 00 sec) to 99.59.59 (99 hrs, 59 min, 59 sec) •...
Page 134 8.1 Storing/Recalling Measured/Computed Data Recalling Measured/Computed Data (Retrieving Data from the Internal Memory) After displaying data stored in the internal memory, you can use all display functions and carry out integration and display these data. Furthermore, by using the communication function, data can be output. •...
Page 135: Storing/Recalling Setup Parameters
HARMONICS KEY LOCK The explanation given in this section uses WT230 as an example. For the differences between the WT210 and the WT230, see section 2.2, “Operation Keys and Functions/Element Display.” Procedure • Operate the instrument by following the thick lines in the menu below.
Page 136 8.2 Storing/Recalling Setup Parameters Explanation Storing Setup Parameters • Stores the current setup parameters which consist of the following. Four destinations (FiLE1/FilE2/FiLE3/FiLE4) are available. Measurement range, measurement mode, measurement synchronization source, scaling settings, averaging settings, input filter settings, MAX hold ON/OFF setting, computation settings, number of displayed digits, display update rate setting, crest factor, integration settings, harmonic settings, plotter output settings, store/recall settings, and communication settings.
Page 137: Chapter 9 External In/Output Function
TTL level : 0 to 0.4 V (8 mA) : 0 to 0.8V : 2.4 to 5 V (–400 µA) : 2.0 to 5V /DA4 specifications (for WT210: 760401 only) remote control, 4 channel D/A output Pin No. Signal Pin No.
Page 138 10ch (Output) (Output) (Output) (Output) (Output) (Output) (Output) (Output) (Output) /CMP specifications (for WT210/WT230: 760401, 760502, 760503) remote control, 4 channel D/A output, 4 channel comparator output Pin No. Signal Pin No. Signal (Input) EXT STOP DIGITAL COM (Input) (Input)
Page 139: Remote Control (Option)
Note If the period of the EXT. TRIG signal does not meet the conditions of the figure above, the signal may not be identified by the WT210/WT230. CAUTION Do not apply a voltage which exceeds the TTL level to the remote controller pin.
Page 140: D/A Output (Option)
HARMONICS KEY LOCK The explanation given in this section uses WT230 as an example. For the differences between the WT210 and the WT230, see section 2.2, “Operation Keys and Functions/Element Display.” Procedure • Operate the instrument by following the thick lines in the menu below.
Page 141 9.3 D/A Output (Option) Setting the Preset integration Time Select the preset integration time ( Display C ) RESET Hour SHIFT INTEG SET ( Display A ) ENTER ENTER sets the value moves digits SHIFT Minute Second ( Display B ) ( Display C ) ENTER ENTER...
Page 142 *2 For details concerning the positive value of the ampere hour, refer to page 6-3. • Setting the element (corresponds to colum B in the procedure) • WT210 (760401) no such element setting available; • WT230 (760502) element can be selected from 1, 3, or 4 •...
Page 143 9.3 D/A Output (Option) Setting the rated integration time The D/A output of integrated values is 5.0 VFS when rated value is input continuously for the specified time (integration preset time). This is also true when scaling or Σ is specified.
Page 144 9.3 D/A Output (Option) Relation between the output item and the D/A output voltage • Frequency D/A output Approx. 7.5 V 5.0 V 2.5 V 0.5 V Displayed value 10 Hz 100 kHz 0.5 Hz 1 kHz 1 Hz 100 Hz 10 kHz •...
Page 145: Comparator Function (Option)
Comparator Function (Option) When the instrument is equipped with option /CMP you can compare the measured, computed, and integrated values with previously set limits and these results can be output by contact relay. Contact Relay Output This instrument is equipped with four contact relays (4 ch) as follows. If the relay is not operating, the NC (Normally Closed) contact is closed.
Page 146 9.4 Comparator Function (Option) Dual Mode This mode allows you to combine the limit values of two relays (e.g. the upper value (Hi) and the lower value (Lo)) to determine the contact status. The four relays will be fixed as two pairs of ch1 & ch2 and ch3 & ch4. Setting the limit values of a pair of relays (e.g.
Page 147 9.4 Comparator Function (Option) CAUTION Make sure not to greatly vary the input signal when using the comparator function. Depending on the input signal used for determination, the instrument may display error codes (i.e. overrange) and this will change the output relays as follows.
Page 148: Setting The Comparator Mode (Option)
HARMONICS KEY LOCK The explanation given in this section uses WT230 as an example. For the differences between the WT210 and the WT230, see section 2.2, “Operation Keys and Functions/Element Display.” Procedure • Operate the instrument by following the thick lines in the menu below.
Page 149: Setting The Comparator Limit Values (Option)
HARMONICS KEY LOCK The explanation given in this section uses WT230 as an example. For the differences between the WT210 and the WT230, see section 2.2, “Operation Keys and Functions/Element Display.” Procedure • Operate the instrument by following the thick lines in the menu below.
Page 150 9.6 Setting the Comparator Limit Values (Option) Setting the Comparator Limit Values in case of Harmonic Measurement Select the comparator function ( Display C ) SETUP SHIFT OUTPUT ( Display C ) ENTER ENTER Set the relay Set the type of limit Set the limit value Set the exponent ( Display C )
Page 151 * For details concerning the positive value of the ampere hour, refer to page 6-3. • Selecting the element (corresponds to column B in the procedure) • WT210 (760401) no such element setting available; • WT230 (760502) element can be selected from 1, 3, or 4 •...
Page 152 9.6 Setting the Comparator Limit Values (Option) • Selecting the element (corresponds to column B in the procedure) • WT210 (760401) no such element setting available; • WT230 (760502) element can be selected from 1 or 3 • WT230 (760503) element can be selected from 1, 2, or 3 •...
Page 153: Comparator Display (Option)
HARMONICS KEY LOCK The explanation given in this section uses WT230 as an example. For the differences between the WT210 and the WT230, see section 2.2, “Operation Keys and Functions/Element Display.” Procedure • Operate the instrument by following the thick lines in the menu below.
Page 154 9.7 Comparator Display (Option) Explanation Comparator Display Function This function allows you to verify the set limits together with measurement/computation data on the display when using the comparator function. The display is as follows, depending on whether the comparator function is set to single or dual mode. •...
Page 155: Turning The Comparator Function On/Off (Option)
HARMONICS KEY LOCK The explanation given in this section uses WT230 as an example. For the differences between the WT210 and the WT230, see section 2.2, “Operation Keys and Functions/Element Display.” Procedure • Operate the instrument by following the thick lines in the menu below.
Page 156: Outputting To An External Plotter Or External Printer
HARMONICS KEY LOCK The explanation given in this section uses WT230 as an example. For the differences between the WT210 and the WT230, see section 2.2, “Operation Keys and Functions/Element Display.” Procedure • Operate the instrument by following the thick lines in the menu below.
Page 157 9.9 Outputting to an External Plotter / Printer Select the Output Items (Display C) (Display C) Set the output items SETUP ENTER (Display C) SHIFT OUTPUT ENTER ENTER End of setting sets the A column (output function) moves to the B column SHIFT selects from element 1 to 3 Activating the Output...
Page 158 • 3: Select this when the output items of element 3 should be printed out. Executing Output After connecting the external plotter/printer to the WT210/WT230, execute the output. dATA: All data selected as output items will be output. PnL: All set-up parameters will be output.
Page 159 9.9 Outputting to an External Plotter / Printer Note • The harmonic measurement items that are output via the communication interface (GP-IB or serial) vary depending on the output items of harmonic measurement selected here. • When V, A, P, or dEG is selected, the item is output via communication interface as-is. •...
Page 160 Example of Output to an External Printer (Some sections in the following figure such as fonts and graph lines differ in appearance from the actual output.) Output example of setup parameters Output example of harmonic measured data WT210/230 Setup Lists Model : M/760503/HRM Rev. : 2.01...
Page 161: Chapter 10 Gp-Ib Interface (Option)
Addressable Mode This mode allows the WT210/WT230 to be controlled using commands from the controller. The command system before the IEEE St’d 488.2 standard can be used. The WT210/WT230 outputs data when a data output request command “OD” is received.
Page 162 10.1 GP-IB Interface Functions and Specifications GP-IB Interface Specifications • Electrical & mechanical specifications: conforms to IEEE st’d 488-1978 • Functional specifications: refer to the table below • Protocol: Varies depending on the mode used. See the previous page. • Code: ISO (ASCII) code •...
Page 163: Responses To Interface Messages, And Remote/Local Modes
10.2 Responses to Interface Messages, and Remote/Local Modes Responses to Interface Messages IFC (Interface Clear) Unaddresses talker and listener. REN (Remote Enable) Transfers the instrument from local control to remote control. GTL (Go To Local) Transfers the instrument from remote control to local control. SDC (Selective Device Clear), DCL (Device Clear) Cleasrs GP-IB input/output buffer, and resets an error.
Page 164: Status Byte Format (Before The Ieee 488.2 Standard)
10.3 Status Byte Format (before the IEEE 488.2 Standard) DIO 5 DIO 8 DIO 7 DIO 6 DIO 4 DIO 3 DIO 2 DIO 1 Integration ERROR STORE/ OVER Syntax Integration Computation BUSY RECALL ERROR BUSY Integration Busy (DIO 8) This bit is set to “1”...
Page 165: Output Format For Measured/Computed Data, Setup Parameters, And Error Codes
10.4 Output Format for Measured/Computed Data, Setup Parameters, and Error Codes This section describes ASCII data output format in addressable mode or talk-only mode. For the data output format in 488.2 mode, see section 14.3.9, “MEASure Group” and pages 14-32 to 14-34. Output Format of Normal Measured/Computed Data Data Format Normal measurement data consists of a 6-byte header and 11-byte data (total of 17...
Page 166 When the frequency is set by either of the following methods, only one value is measured, and that value will be output. • by panel keys : by the FUNCTION key and ELEMENT key of display C (except WT210) • by communication command: by the “DC” or “EC” command.
Page 167 For example, if the ch.2 on line 1 is set to “no output”, data of ch.1 will be followed by data of ch.3. Output Format in case of Normal Measurement • WT210 (760401) Data Line 1...
Page 168 10.4 Output Measured/Computed Data, Setup Parameters, and Error Codes Default Output Format in case Integration Measurement • WT210 (760401) Data Line 1 Terminator (The data number will only be output in case of recall) number Line 2 W1 data Terminator...
Page 169 10.4 Output Measured/Computed Data, Setup Parameters, and Error Codes Output Format of Harmonic Measurement Data Data Format Harmonic measurement data consists of an 8-byte header and 11-byte data (total of 19 bytes). Header (8 bytes) Data (11 bytes) Header Section h1 to h3: data type V__: voltage A__: Current...
Page 170 10.4 Output Measured/Computed Data, Setup Parameters, and Error Codes Output Format The output format depends on the selected output items which can be selected by the “OH” command. • In case of voltage and current All computed values of Line 1 harmonic distortion Terminator the 1st to 50th order...
Page 171: Setting The Address And Mode
HARMONICS KEY LOCK The explanation given in this section uses WT230 as an example. For the differences between the WT210 and the WT230, see section 2.2, “Operation Keys and Functions/Element Display.” Procedure • Operate the instrument by following the thick lines in the menu below.
Page 172 10.5 Setting the Address and Mode Explanation Setting the Mode Refer to page 10-1 for details. Setting the Address A particular address is assigned to each device connected to the GP-IB interface so that each device can be recognized by every device. Therefore, an address must be assigned to this instrument when it is connected to a personal computer.
Page 173: Setting The Output Items
HARMONICS KEY LOCK The explanation given in this section uses WT230 as an example. For the differences between the WT210 and the WT230, see section 2.2, “Operation Keys and Functions/Element Display.” Procedure • Operate the instrument by following the thick lines in the menu below.
Page 174 10.6 Setting the Output Items Setting the Output Item in case of Harmonic Measurement ( Display C ) ( Display C ) Set the output item SETUP ENTER ( Display C ) SHIFT OUTPUT ENTER ENTER End of setting * When graph printouts are selected as the output item, only data values will be output by communication Sets the A column (output function)
Page 175 The element setting depends on the model and is as follows. The initial value is “1.” • WT210 (760401) no such element setting available; • WT230 (760502) element can be selected from 1, 3, or 4 • WT230 (760503) element can be sleected from 1, 2, 3, or 4 The element number 4 represents Σ.
Page 176: Commands (Before The Ieee 488.2 Standard)
10.7 Commands (before the IEEE 488.2 Standard) For a detailed description of each command, refer to section 13.1. Command Description Wiring system WR m (WiRing) sets wiring system Voltage range RV m (Range Voltage) sets voltage range AV m (Auto Voltage range) sets voltage auto range Current range RA m (Range current(A))
Page 177 10.7 Commands (before the IEEE 488.2 Standard) Command Description /HAM (option) HA m (Harmonics Analize) sets harmonic measurement ON/OFF HE m (Harmonics Eiement) sets harmonics element PS m (Pll Source ) sets PLL source DF m (Distortion Formula) sets distortion formula OR (harmonics ORder) sets display order OH m1,m2...
Page 178: Chapter 11 Serial Interface (Option)
Chapter 11 Serial Interface (Option) 11.1 Serial Interface Functions and Specifications This instrument is equipped with a serial (RS-232-C) interface in accordance with your preference. This interface permits remote control from a controller such as a personal computer, and output of various data. Overview of the Serial Interface The table below shows functions that are available in each mode.
Page 179: Serial Interface Specifications
11.1 Serial Interface Functions and Specifications Serial Interface Specifications Electrical characteristics: conforms to EIA-232 (RS-232) Connection: point-to-point Communications: full-duplex Synchronization: start-stop system Baud rate: 1200, 2400, 4800, 9600 Start bit: 1 bit Data length (word length): 7 or 8 bits Parity: Even, odd or no parity Stop bit:...
Page 180: Connecting The Interface Cable
11.2 Connecting the Interface Cable When connecting this instrument to a personal computer, make sure that the handshaking method, data transmission rate and data format selected for the instrument match those selected fro the computer. For details, refer to the following pages. Also make sure that the correct interface cable is used.
Page 181 11.2 Connecting the Interface Cable Table of RS-232 Standard Signals and their JIS and CCITT Abbreviations Abbreviations Pin No. Name RS-232 CCITT (25-pin connector) AA(GND) Protective ground AB(GND) Signal ground BA(TXD) Transmitted data BB(RXD) Received data CA(RTS) Request to send CB(CTS) Clear to send CC(DSR)
Page 182: Setting The Mode, Handshaking Method, Data Format And Baud Rate
HARMONICS KEY LOCK The explanation given in this section uses WT230 as an example. For the differences between the WT210 and the WT230, see section 2.2, “Operation Keys and Functions/Element Display.” Procedure • Operate the instrument by following the thick lines in the menu below.
Page 183 11.3 Setting the Mode, Handshaking Method, Data Format and Baud Rate Explanation Mode Setting Refer to page 11-1 for more details. Handshaking To use an RS-232-C interface to transfer data between this instrument and a computer, it is necessary to use certain procedures by mutual agreement to ensure the proper transfer of data.
Page 184 11.3 Setting the Mode, Handshaking Method, Data Format and Baud Rate Data Format The serial interface of this instrument performs communications using start-stop synchronization. In start-stop synchronization, one character is transmitted at a time. Each character consists of a start bit, data bits, a parity bit, and a stop bit. Refer to the figure below.
Page 185: Format And Commands Of Output Data (Before The Ieee488.2 Standard)
The format of output data is the same as the GP-IB interface. Refer to section 10.4 for more details. Commands The commands used in serial communications on the WT210/WT230 are common with GP-IB commands. However, the following commands are different. DL/DL?<terminator>...
Page 186: Chapter 12 Initializing Setup Parameters, Zero-Level Compensation, And Key
Chapter 12 Initializing Setup Parameters, Zero-Level Compensation, and Key Lock 12.1 Back-up of Setup Parameters In order to protect setup parameters in case of a power failure and such, this instrument is equipped with a lithium battery which protects these parameters. The following setup parameters are being kept.
Page 187: Initializing Setup Parameters
HARMONICS KEY LOCK The explanation given in this section uses WT230 as an example. For the differences between the WT210 and the WT230, see section 2.2, “Operation Keys and Functions/Element Display.” Procedure • Operate the instrument by following the thick lines in the menu below.
Page 188 When Initializing Setup Parameters at Power-On If the power switch is turned ON while holding down the ENTER key, the WT210/WT230 powers up using initial settings. Keep holding down the ENTER key until the illumination of all LEDs turn off (step of the “Opening Message”...
Page 189: Performing Zero-Level Compensation
FREQ STORE RECALL HARMONICS KEY LOCK The explanation given in this section uses WT230 as an example. For the differences between the WT210 and the WT230, see section 2.2, “Operation Keys and Functions/Element Display.” Procedure ENTER (Execute zero-level compensation) SHIFT...
Page 190: Key Lock
RECALL HARMONICS KEY LOCK The explanation given in this section uses WT230 as an example. For the differences between the WT210 and the WT230, see section 2.2, “Operation Keys and Functions/Element Display.” Procedure • Turning ON the key lock LOCAL...
Page 191: Commands
Chapter 13 Communication Commands 1 (System of Commands before the IEEE 488.2 Standard) 13.1 Commands AA/AA? Sets the current auto range ON or OFF/ AT/AT? Sets averaging type (exponential or inquires about the current setting. moving)/inquires about the current setting. Syntax AA m <terminator>...
Page 192 Description • Parameter error 12 will occur if “m” is set to component of active power an illegal value. • The output format of the WT210 is the same 6: power factor (PF) for m=0 or 1. 16: harmonic distortion factor...
Page 193 13.1 Commands 7: Input voltage frequency (V Description Parameter error 12 will occur if “m” is set to an illegal value. 8: Input current frequency (A DR/DR? Displays the current range. Syntax DR m <terminator> 9: watt hour (Wh) “m” indicates the range. 10: ampere hour (Ah) m= 0: cancels the range display 12: Peak voltage value (Vpk)
Page 194 13.1 Commands EB/EB? Sets the element for display B/inquires 1: Header added about the current setting. Query H? <terminator> Syntax EB m <terminator> Example “m” indicates element. Description Parameter error 12 will occur if “m” is set to an m= 1: Element 1 illegal value.
Page 195 13.1 Commands Description • If an attempt is made to reset integration 3: Element 3 (for WT230 only) while integration is in progress, execution Query HE? <terminator> error 45 will occur. Example • While recalling or storing is in progress, Description •...
Page 196 13.1 Commands 1: Element 1 Example 2: Element 2 (for WT230 model Description • Parameter error 12 will occur if “m” is set to 760503 only) an illegal value. 3: Element 3 (for WT230 only) • Changing of the measurement mode is not “n”...
Page 197 13.1 Commands can also be performed using a key Query MT?<terminator> operation. Example Description Average active power (MT13, 14, 15, 16) is Syntax OAD m <terminator> displayed only during integration. “m” indicates default no. OA/OA? Sets D/A output items/inquires about the m= 2: Select mode current settings.
Page 198 13.1 Commands 43 Measurement stopped due to 5: Apparent power (VA) overflow during integration 6: Power factor (PF) or due to a power failure. 7: Input voltage frequency (V 44 Attempt made to stop integration while 8: Input current frequency (A integration was interrupted.
Page 199 13.1 Commands OH/OH? Sets communication output information • in case of any other mode types in case of harmonic measurement/ m1= 1: (V) outputs measured inquires about the current settings. voltage value and relative Syntax OH m1,m2 <terminator> harmonic content as a “m1”...
Page 200 (for CM0) measured value of both KV1.000;KA1.000; voltage and current KW1.000 <terminator> “m2” indicates element (for CM1, WT210) m2= 1: Element 1 KV1,1.000;KA1,1.000; 2: Element 2 (for WT230 model KW1,1.000 <terminator> 760503 only) (for CM1, WT230) 3: Element 3 (for WT230 only) KV1,1.000;KV2,1.000;...
Page 201 13.1 Commands OY/OY? Sets the relay output items in case of 1 ≤ m1 ≤ 4 normal measurement/inquires about the “m2” indicates the output item current setting. Up to four items can be number set. m2= 0: no output Syntax OY m1,m2,m3,m4,m5 <terminator>...
Page 202 21: 2.5 mA range (only when 5: V3 (for WT230 only) equipped with option /EX2) 6: A3 (for WT230 only) 22: 5 mA range (WT210 only) Query PS? <terminator> 23: 10 mA range (WT210 only) Example 24: 25 mA range (WT210 only) Description •...
Page 203 13.1 Commands Query RR? <terminator> SA n <terminator> Example RR0,0,0 When CM1 is set: Description • Parameter error 12 will occur if an illegal SA m,n <terminator> value is set. “m” indicates element. m= 0: All elements (Setting not • If the recalling interval is set to 0 h 0 min 0 s, allowed during inquiry) the recalling interval is set to the display 1: Element 1...
Page 204 13.1 Commands “m3” indicates the seconds • You cannot change the setting while 0 ≤ m3 ≤ 59 integration is in progress. Execution error 13 will occur. Query SR? <terminator> • While recalling or storing is in progress, Example SR0,0,0 execution error 19 will occur.
Page 205 13.1 Commands YC/YC? Sets the display channel while the Description • Zero-level compensation is not allowed while comparator function is ON/inquires integration is in progress; execution error 13 about the current setting. will occur. Syntax YC m <terminator> • While recalling is in progress, execution error “m”...
Page 206: Before Programming
Value or character string in ASCII code. Terminator • For GP-IB communication When the WT210/WT230 is a listener, “CR+LF,” “LF,” or “EOI” can be received as a terminator. When the WT210/WT230 is a listener, the terminator specified by the DL command (see page 13-3) is sent.
Page 207 13.2 Before Programming Multiple Command Statements Multiple commands can be written on a single line. In this case, delimit each command statement (command + parameter) using a semicolon. Note A space or a tab can either exist or not exist between a command and a parameter. Query Commands A query command has a question mark attached to the end of the command.
Page 208: Sample Program Image
13.3 Sample Program Image 13-18 IM 760401-01E...
Page 209: Sample Program (Initialization, Error, And Execution Functions)
13.4 Sample Program (Initialization, Error, and Execution Functions) --------------------------------------------------------------------------------------------------- Option Explicit Dim StartFlag As Integer 'Start Flag Dim addr As Integer 'GPIB Address Dim Timeout As Integer 'Timeout Dim Dev As Integer 'Device ID(GPIB) Dim term As String 'Terminator Dim Query(1100) As String 'Query String Dim Dummy As Integer ---------------------------------------------------------------------------------------------------...
Page 210 13.4 Sample Program (Initialization, Error, and Execution Functions) ElseIf (ern = ETAB) Then ers = "ETAB:The return buffer is full" ElseIf (ern = ELCK) Then ers = "ELCK:Address or board is locked" Else ers = "" End If Else ers = "" End If MsgBox ("Status No.
Page 211 13.4 Sample Program (Initialization, Error, and Execution Functions) Private Sub Command5_Click() Dim sts As Integer If (StartFlag = 1) Then Exit Sub End If StartFlag = 1 Text1.Text = "START" List1.Clear List1.AddItem "NOT MAKE" Text1.Text = "END" StartFlag = 0 End Sub --------------------------------------------------------------------------------------------------- Private Sub Command6_Click()
Page 212: Sample Program (Output Of Normal Measurement Data)
13.5 Sample Program (Output of Normal Measurement Data) Sample1(GPIB) Get Normal Data --------------------------------------------------------------------------------------------------- Private Function GpibNormal() As Integer Dim msg As String Dim qry As String Dim qrytemp As String Dim sts As Integer Dim item As Integer Dim comma As Integer Dim cnt As Integer Dim spr As Integer term = Chr$(10)
Page 213 13.5 Sample Program (Output of Normal Measurement Data) 'Clear the RQS of status byte (Read and trash the response) Sleep 1000 sts = ilrsp(Dev, spr) 'Serial Poll List1.Clear 'Read and display the numerical data (It is repeated 10 times in this program) For cnt = 1 To 10 GoSub Readdata Next cnt...
Page 214 13.5 Sample Program (Output of Normal Measurement Data) 13-24 IM 760401-01E...
Page 215: Sample Program (Output Of Harmonic Measurement Data)
13.6 Sample Program (Output of Harmonic Measurement Data) Sample2(GPIB) Get Harmonics Data --------------------------------------------------------------------------------------------------- Private Function GpibHarmonics() As Integer Dim msg As String Dim qrytemp As String Dim sts As Integer Dim cnt As Integer Dim spr As Integer term = Chr$(10) 'terminator msg = Space$(100) List1.AddItem "Now Initializing.
Page 216 13.6 Sample Program (Output of Harmonic Measurement Data) GPIBError: Call DisplayGPIBError(sts, msg) GpibHarmonics = 1 Exit Function Readdata: sts = ilrsp(Dev, spr) 'Serial Poll If (sts < 0) Then GoTo GPIBError End If If ((spr And &H41) <> &H41) Then cnt = cnt - 1 Return End If...
Page 217: Overview Of Ieee 488.2-1992
Chapter 14 Communication Commands 2 (System of Commands Complying to the IEEE 488.2-1992 Standard) 14.1 Overview of IEEE 488.2-1992 The GP-IB interface provided with this instrument conforms to IEEE 488.2-1992. This standard requires the following 23 points be stated in this document. This appendix describes these points. 1 Subsets supported by IEEE 488.1 interface functions Refer to the specifications on page 10-2.
Page 218 14.1 Overview of IEEE 488.2-1992 17 Size of storage area for protected user data if PUD and are used. *PUD? are not supported. *PUD *PUD? 18 Length of resource name if are used. *RDT *RDT? are not supported. *RDT *RDT? 19 Change in status if *RST, , and are used.
Page 219: Program Format
14.2 Program Format 14.2.1 Symbols Used in Syntax 14.2.2 Messages Descriptions Blocks of message data are transferred between the Symbols which are used in the syntax descriptions in controller and this instrument during communications. Section 14.3 are shown below. These symbols are Messages sent from the controller to this instrument referred to as BNF notation (Backus-Naur Form).
Page 220 14.2 Program Format Program message unit format <Response header> The format of a program message unit is shown below. A response header sometimes precedes the response data. Response data must be separated from the header by a space. For details, refer to page 14-7. <Program header>...
Page 221: Commands
14.2 Program Format 14.2.3 Commands Dead Lock This instrument has a buffer memory in which both There are two types of command (program header) program and response messages of 1024 bytes or which can be sent from the controller to this more can be stored (The number of bytes available will instrument.
Page 222 14.2 Program Format When Consecutive Commands are in the Same Header Interpretation Rules Group This instrument interprets the header received This instrument stores the hierarchical level of the according to the following rules. command which is currently being executed, and •...
Page 223: Responses
14.2 Program Format 14.2.4 Responses 14.2.5 Data On receiving a query from the controller, this A data section comes after the header. A space must instrument returns a response message to the be included between the header and the data. The controller.
Page 224 14.2 Program Format <Voltage>, <Current>, <Time> <Character Data> <Voltage>, <Current>, and <Time> indicate decimal <Character data> is a specified string of character data values which have physical significance. <Multiplier> (a mnemonic). It is mainly used to indicate options, or <Unit> can be attached to <NRf>. They can be and is chosen from the character strings given in { }.
Page 225: Synchronization With The Controller
14.2 Program Format 14.2.6 Synchronization with the <Block data> Controller <Block data> is arbitra 8-bit data. <Block data> is only used for response messages. Response messages There are two kinds of command; overlap commands are expressed in the following form. and sequential commands.
Page 226 14.2 Program Format Using the COMMunicate:WAIT command The “ ” command halts COMMunicate:WAIT communications until a specific event is generated. Example STATus:FILTer1 FALL;:STATus:EESR?; [:CONFigure]:VOLTage: RANGe 60V<PMT> (Response to STATus:EESR? is decoded.) COMMunicate:WAIT 1;: MEASure[:NORMal]:VALue?<PMT> For a description of “ ” and STATus:FILTer1 FALL “...
Page 227: Commands
14.3 Commands 14.3.1 Command List Command Description Page AOUTput Group :AOUTput? Queries all settings related to D/A output. 14-15 :AOUTput:CHANnel<x> Sets/queries the D/A output item. 14-15 :AOUTput:IRTime Sets/queries the preset integration time for D/A output of integrated values. 14-15 :AOUTput:PRESet Sets the default value as D/A output items.
Page 228 14.3 Commands Command Description Page DISPlay Group :DISPlay<x>? Queries all the display settings. 14-22 :DISPlay<x>:ELEMent Sets/queries the element to be displayed. 14-22 :DISPlay<x>:FUNCtion Sets/queries the function to be displayed. 14-23 :DISPlay<x>:MODE Sets/queries the contents of the display. 14-23 :DISPlay<x>:RESolution Sets/queries the number of display digits. 14-23 HARMonics Group :HARMonics?
Page 229 14.3 Commands Command Description Page :MEASure[:NORMal]:ITEM:{TIME|MATH} Sets/queries the ON/OFF state of the communication output of {integration time|MATH}. 14-31 :MEASure[:NORMal]:ITEM:<normal measurement function>? Queries communication output settings of the normal measurement function. 14-31 :MEASure[:NORMal]:ITEM:<normal measurement function>[:ALL] Sets the communication output items concerning all elements or S ON/ OFF at once.
Page 230 14.3 Commands Command Description Page STORe Group :STORe? Queries all settings related to storing data. 14-41 :STORe:INTerval Sets/queries the interval for storing data. 14-41 :STORe:PANel Saves the setup parameters to a file. 14-41 :STORe[:STATe] Sets/queries the store function ON/OFF. 14-41 Common Command Group *CAL? Executes zero-level compensation and queries the results.
Page 231: Aoutput Group
14.3 Commands 14.3.2 AOUTput Group The commands in the AOUTput group are used to make settings relating to, and inquires about D/A output (option). This allows you to make the same settings and inquiries as can be set using the lower menus of [OUTPUT]-”dA” or [INTEG SET]-”dAtimE”.
Page 232: Communicate Group
14.3 Commands 14.3.3 COMMunicate Group The commands in the COMMunicate group are used to make settings relating to, and inquires about communications. There is no front panel key for this function. :COMMunicate HEADer <Space> <NRf> VERBose <Space> <NRf> WAIT <Space> <Register>...
Page 233 14.3 Commands COMMunicate:VERBose Function Determines whether a response to a query is to be returned in full form (for example: CONFIGURE: VOLTAGE:RANGE 150.0E+00), or in abbreviated form (for example: VOLT:RANG 150.0E+00), or queries the current setting. Syntax COMMunicate:VERBose {<Boolean>} COMMunicate:VERBose? Example COMMUNICATE:VERBOSE ON COMMUNICATE:VERBOSE?
Page 234: Configure Group
14.3 Commands 14.3.4 CONFigure Group The CONFigure group relates to the measurement settings. The same function can be performed using the WIRING key, VOLTAGE key, CURRENT key, MODE (SHIFT + VOLTAGE) key and SETUP key (except for “PnLrSt”, “u.rAtE”) on the front panel. The external sensor input range and external sensor scaling values are only vald if equipped with the external sensor option (/EX1 or /EX2).
Page 235 14.3 Commands SYNChronize <Space> VOLTage CURRent CFACtor <Space> <NRf> AVERaging STAT e <Space> <NRf> TYPE <Space> LINear <NRf> EXPonent CONFigure? Example [CONFIGURE]:AVERAGING:STATE OFF [CONFIGURE]:AVERAGING:STATE? Function Queries all the settings related to the -> :CONFIGURE:AVERAGING:STATE 0 measurement conditions. Syntax CONFigure? [CONFigure]:AVERaging:TYPE Example CONFIGURE? ->...
Page 236 0.5, 1, 2.5, 5, or 10 A) ELEMENT1 50.00E+00; The following settings ELEMENT2 50.00E+00; available only on ELEMENT3 50.00E+00 WT210.2.5 mA to 100 mA [CONFigure]:CURRent:ESCaling[:ALL] (2.5 m, 5 m, 10 m, 25 m, Function Sets the scaling constants for the external 50 m, or 100 mA) sensor for all elements at once.
Page 237 (15, 30, 60, SFACtor}:ELEMent<x> {<NRf>} 150, 300, 600V) [CONFigure]:SCALing:{PT|CT|SFACtor}: • When the crest factor is set to 6 ELEMent<x>? <Voltage> = 7.5 V to 300 V (7.5, 15, <x>= 1 (WT210 single-phase 30, 75, 150, or 300) model) 14-21 IM 760401-01E...
Page 238: Display Group
<x>= 1 to 3 3:Display C 1:Display A Example DISPlay1? -> :DISPLAY1:MODE VALUE; 2:Display B FUNCTION V;ELEMENT 1;RESOLUTION HIGH 3:Display C {<NRf>}=1 (WT210 single-phase model) 1, 3 (WT230 three-phase, three-wire model) 1 to 3 (WT230 three-phase, four-wire model) Example DISPLAY1:ELEMENT 1 DISPLAY1:ELEMENT? ->...
Page 239 14.3 Commands DISPlay<x>:FUNCtion DISPlay<x>:RESolution Function Sets the function to be displayed/queries the Function Sets the number of displayed digits/queries the current setting. current setting. Syntax DISPlay<x>:FUNCtion {<display Syntax DISPlay<x>:RESolution {HIGH|Low} function>} DISPlay<x>:RESolution? DISPlay<x>:FUNCtion? <x>= 1 to 3 <x>= 1 to 3 1:Display A 1:Display A 2:Display B...
Page 240: Harmonics Group
<Space> <NRf> ELEMent <x> <Space> DISPlay ORDer <Space> <NRf> HARMonics? HARMonics:ELEMent? {<NRf>}=1 (WT210 single-phase Function Queries all settings relating to harmonic model) measurement. 1, 3 (WT230 three-phase, Syntax HARMonics? three-wire model) Example HARMONICS? -> :HARMONICS:STATE 0; 1 to 3 (WT230 three-phase, ELEMENT 1;SYNCHRONIZE V,1;THD IEC;...
Page 241: Integrate Group
14.3 Commands HARMonics:SYNChronize HARMonics:THD Function Sets the fundamental frequency for PLL Function Sets the computation method for harmonic synchronization (PLL source)/queries the distortion (THD) for harmonic measurement/ current setting. queries the current setting. Syntax HARMonics:SYNChronize Syntax HARMonics:THD {IEC|CSA} {(V|A),(<NRf>|ELEMent<1-3>)} HARMonics:THD? HARMonics:SYNChronize? Example HARMONICS:THD IEC...
Page 242: Math Group
MATH:ARITHMETIC ADD Syntax MATH:CFACtor {(V|A),(<NRf>| MATH:ARITHMETIC? ELEMent<x>)} -> :MATH:ARITHMETIC ADD <x>= 1 (WT210 single-phase model) Description If [MATH:TYPE] is not set to [ARIThmetic], this 1, 3 (WT230 three-phase command will be meaningless. The computing equation selections are as follows: three-wire model)
Page 243 14.3 Commands MATH:TYPE Function Sets/queries the computing equation Syntax MATH:TYPE {EFFiciency| CFACtor|ARIThmetic|AVERage} MATH:TYPE? Example MATH:TYPE CFACTOR MATH:TYPE? -> :MATH:TYPE CFACTOR Description The equation method selections are as follows: EFFiciency : Efficiency (valid only for WT230) CFACtor : Crest factor ARIThmetic : Four arithmetic operations AVERage : Average active power during...
Page 244: Measure Group
14.3 Commands 14.3.9 MEASure Group The MEASure group relates to measurement/computation data. There are no front panel keys for these functions. Also, your instrument must be equipped with the /HRM (harmonic measurement function) to be able to use the related commands. Setting the output items for measurement/computation data is only valid in the communication mode.
Page 245 14.3 Commands HEADer <Space> <NRf> MEASure? MEASure:HARMonics? Function Queries all the settings related to measurement/ Function Queries all settings related to harmonic measurement data. computation data. Syntax MEASure? Syntax MEASure:HARMonics? Example MEASURE:HARMONICS? Example Example of WT230 three-phase four- -> :MEASURE:HARMONICS:ITEM: wire model SYNCHRONIZE 1;VTHD 1;V 1;VCON 1;...
Page 246 14.3 Commands MEASure:HARMonics:ITEM:{SYNChronize|<harmonic MEASURE:NORMAL? -> :MEASURE:NORMAL: ITEM:V:ELEMENT1 1;ELEMENT2 1; measurement function>} ELEMENT3 1;SIGMA 1;:MEASURE:NORMAL: Function Sets the communication output item of harmonic ITEM:A:ELEMENT1 1;ELEMENT2 1; measurement ON/OFF, queries the current ELEMENT3 1;SIGMA 1;:MEASURE:NORMAL: setting. ITEM:W:ELEMENT1 1;ELEMENT2 1; Syntax MEASure:HARMonics:ITEM:{SYNChronize| ELEMENT3 1;SIGMA 1;:MEASURE:NORMAL: <harmonic measurement function>} {<...
Page 247 14.3 Commands MEASure[:NORMal]:ITEM:PRESet <x>= 1 (WT210 single-phase model) Function Sets the ON/OFF pattern for all communication 1, 3 (WT230 three-phase outputs of the normal measurement function. three-wire model) Syntax MEASure[:NORMal]:ITEM:PRESet {NORMal| 1 to 3 (WT230 three phase four- INTEGrate|CLEar} wire model)
Page 248 14.3 Commands Data Format/Output Format of Normal and Harmonic Measurement Data <ASCII> The data format/output format of normal and harmonic measurement data which is requested by , is as follows. MEASure[:NORMal]:VALue? MEASure:HARMonics:VALue? Data Format of Normal Measurement Data • All data of the <harmonic measurement function> are output in the <NR3> format. (Example) 123.45E+00 →...
Page 249 14.3 Commands Output Example of Normal Measurement Data • Output example for model 760502 after having sent the following commands. (Sent) MEASURE:NORMAL:ITEM:PRESET NORMAL MEASURE:NORMAL:VALUE? (Received data) 10.004E+00,10.002E+00,10.003E+00,49.041E+00,49.052E+00, 49.047E+00,429.00E+00,429.02E+00,0.8580E+03 (Data contents) V1:10.004E+00 V3:10.002E+00 V∑:10.003E+00 A1:49.041E+00 A3:49.052E+00 A∑:49.047E+00 W1:429.00E+00 W3:429.02E+00 W∑:0.8580E+03 • Output example for model 760503 where measurement data first have been stored during integration, and while recalling these data, the following commands have been sent.
Page 250 14.3 Commands • : 49(or 29) data VCON,ACON,WCON Harmonic relative content (2nd order)→ · →harmonic relative content (50(or 30)th order) • : 1 data Outputs the power factor of the fundamental (1st order). • : 50(or 30) data VDEG Phase angle between the1st order voltage and 1st order current→Phase angle between the 2nd order voltage and 1st order voltage→...
Page 251 14.3 Commands Data Format/Output Format of Normal Measurement and Harmonic Measurement Data <BINARY> The data format and output format of normal measurement and harmonic measurement data in binary format that are output by the MEASure[:NORMal]:BINary? or MEASure:HARMonics:BINary? command are as follows: Data Format Measured data consists of a 2-byte header and 4-byte data (total of 6 bytes).
Page 252: Recall Group
14.3 Commands 14.3.10 RECall Group The commands in the RECall group are used to make settings relating to, and inquires about recalling data. This allows you to make the same settings and inquiries as can be set using the lower menus of [MEMORY]-“rECAL” or [MEMORY]-“PnLrC”.
Page 253: Relay Group
14.3 Commands 14.3.11 RELay Group The commands in the RELay group are used to make settings relating to, and inquiries about the comparator function. This allows you to make the same settings and inquiries as when using the lower menus of [OUTPUT]- “rELAY”.
Page 254 14.3 Commands RELay:HCHannel<x>:FUNCtion RELay:NCHannel<x>? Function Sets the function of the relay output item in case Function Queries all settings related to the relay output of harmonic measurement/queries the current items in case of normal measurement. setting. Syntax RELay:NCHannel<x>? Syntax RELay:HCHannel<x>:FUNCtion {<harmonic <x>=1 to 4 measurement function>,(<NRf>| Example...
Page 255: Sample Group
14.3 Commands 14.3.12 SAMPle Group The commands in the SAMPle group are used to make settings relating to sampling. The commands allow you to make the same settings and inquiries as when the [HOLD] key on the front panel or the “u.rAtE” menu of the [SETUP] key is used.
Page 256: Status Group
14.3 Commands 14.3.13 STATus Group The commands in the STATus group are used to make settings relating to, and inquiries about the communication status. There is no corresponding operation using the front panel. Refer to section 14.4 for status reports. :STATus CONDition EESE...
Page 257: Store Group
14.3 Commands STATus:QMESsage STATus:SPOLL?(Serial Poll) Function Sets whether or not to apply the corresponding Function Executes serial polling. message to the query “STATus:ERRor?” Syntax STATus:SPOLL? Example STATUS:SPOLL? -> STATUS:SPOLL 0 queries the current setting. Syntax STATus:QMESsage {<Boolean>} Description This command is used for the serial interface. STATus:QMESsage? An interface message is available for the GP-IB Example...
Page 258: Common Command Group
14.3 Commands 14.3.15 Common Command Group The commands in the common command group are independent of the instrument’s functions, and are specified in IEEE 488.2-1987. There is no front panel key that corresponds to this group. *CAL *CLS *ESE <Space> <NRf>...
Page 259 Syntax *IDN? setting is ignored) Example *IDN? -> YOKOGAWA,760503,0,F1.01 Description • Each bit is expressed as a decimal number. Description A reply consists of the following information: • For example, if “*SRE 239” is set, the service <Model>,<Type>,<Serial No.> and <Firmware request enable register will be set to version>.
Page 260: Status Report
14.4 Status Report 14.4.1 Overview of the Status Report The figure below shows the status report which is read by a serial poll. This is an extended version of the one specified in IEEE 488.2-1992. Service request enable register & &...
Page 261: Status Byte
14.4 Status Report 14.4.2 Status Byte Overview of Registers and Queues Name Function Writing Reading Overview of Status Byte Status byte — Serial poll (RQS), *STB?(MSS) ESB MAV EES EAV Service request Masks status byte. *SRE *SRE? enable register Standard event Event in the —...
Page 262: Standard Event Register
14.4 Status Report 14.4.3 Standard Event Register Operation of the Status Byte A service request is issued when bit 6 of the status Overview of the Standard Event Register byte becomes “ .” Bit 6 becomes “ ” when any of the CME EXE DDE QYE RQC OPC other bits becomes “...
Page 263: Extended Event Register
14.4 Status Report Operation of the Standard Event Register Reading from the Standard Event Register The standard event register is provided for eight The contents of the standard event register can be different kinds of event which can occur inside the read by the *ESR command.
Page 264: Output Queue And Error Queue
14.4 Status Report Manual integration mode Standard integration mode Continuous integration mode Integration Integration Integration Integration Timer preset time Timer preset Timer preset Timer Reset time time preset time Start Stop Reset Start Stop Reset Start Stop When the elapsed integration time reaches the preset integration time, data will be reset automatically and the contact status will change.
Page 265: Before Programming
• GP-IB board: AT-GPIB/TNT IEEE-488.2 by National Instruments. Settings on Visual Basic Standard modules used: Niglobal.bas Vbib-32.bas WT210/WT230 Settings GP-IB address • The sample programs given in this chapter use a GP-IB address of 1 for the WT210/WT230. • Set the GP-IB address to 1 according to the procedures described in section 10.5.
Page 266: Sample Program Image
14.6 Sample Program Image 14-50 IM 760401-01E...
Page 267: Sample Program (Initialization, Error, And Execution Functions)
14.7 Sample Program (Initialization, Error, and Execution Functions) --------------------------------------------------------------------------------------------------- Option Explicit Dim StartFlag As Integer 'Start Flag Dim addr As Integer 'GPIB Address Dim Timeout As Integer 'Timeout Dim Dev As Integer 'Device ID(GPIB) Dim term As String 'Terminator Dim Query(1100) As String 'Query String Dim Dummy As Integer ---------------------------------------------------------------------------------------------------...
Page 268 14.7 Sample Program (Initialization, Error, and Execution Functions) ElseIf (ern = ESRQ) Then ers = "ESRQ:SRQ remains asserted" ElseIf (ern = ETAB) Then ers = "ETAB:The return buffer is full" ElseIf (ern = ELCK) Then ers = "ELCK:Address or board is locked" Else ers = ""...
Page 269 14.7 Sample Program (Initialization, Error, and Execution Functions) Private Sub Command5_Click() Dim sts As Integer If (StartFlag = 1) Then Exit Sub End If StartFlag = 1 Text1.Text = "START" List1.Clear List1.AddItem "NOT MAKE" Text1.Text = "END" StartFlag = 0 End Sub --------------------------------------------------------------------------------------------------- Private Sub Command6_Click()
Page 270: Sample Program (Output Of Normal Measurement Data)
14.8 Sample Program (Output of Normal Measurement Data) Sample1(GPIB) Get Normal Data --------------------------------------------------------------------------------------------------- Private Function GpibNormal() As Integer Dim msg As String 'Command buffer Dim qry As String 'Query buffer Dim sts As Integer Dim item As Integer Dim comma As Integer Dim length As Integer Dim cnt As Integer term = Chr$(10)
Page 271 14.8 Sample Program (Output of Normal Measurement Data) 'Set the communication output items '1. V/A/W -> on, others -> off msg = "MEASURE:ITEM:PRESET NORMAL" + term sts = ilwrt(Dev, msg, Len(msg)) If (sts < 0) Then GoTo GPIBError End If '2.
Page 272 14.8 Sample Program (Output of Normal Measurement Data) 14-56 IM 760401-01E...
Page 273: Sample Program (Output Of Harmonic Measurement Data)
14.9 Sample Program (Output of Harmonic Measurement Data) Sample2(GPIB) Get Harmonics Data --------------------------------------------------------------------------------------------------- Private Function GpibHarmonics() As Integer Dim msg As String 'Command buffer Dim qry As String 'Query buffer Dim sts As Integer Dim cnt As Integer Dim item As Integer Dim comma As Integer Dim length As Integer term = Chr$(10)
Page 274 14.9 Sample Program (Output of Harmonic Measurement Data) Sleep 1000 List1.Clear 'Read and display the harmonics data (It is repeated 10 times in this program) For cnt = 1 To 10 'Clear the extended event register (Read and trash the response) msg = "STATUS:EESR?"...
Page 275 14.9 Sample Program (Output of Harmonic Measurement Data) 14-59 IM 760401-01E...
Page 276: Ascii Character Codes
14.10 ASCII Character Codes ASCII character codes are given below. ‘ ” & ’ < > (RUBOUT) Address Universal Listener Talker Secondary Command Command Address Address Command Example Octal GP-IB code ASCII character code Hexadecimal Decimal 14-60 IM 760401-01E...
Page 277: Communication-Related Error Messages
14.11 Communication-related Error Messages Error messages related to communications are given below. When servicing is required, contact your nearest YOKOGAWA representative. Only error messages relating to the communication mode 488.2 are given here. For other error messages, refer to appendix 1 and section 15.4.
Page 278 14.11 Communication-related Error Messages Errors in communications execution (200 to 299) Code Message Action Reference Setting conflict Check the relevant setting. 14.3 Data out of range Check the setting range. 14.3 Too much data Check the data byte length. 14.3 Illegal parameter value Check the setting range.
Page 279: Chapter 15 Maintenance And Troubleshooting
If you terminate adjustment mode (turn OFF the power switch) and turn the power back ON, the WT210/230 starts with the setup parameters initialized. Select “rAnGE” and press the ENTER key. Then let the instrument warm up for at least 30 minutes.
Page 280 Adjusting the Voltage Range As shown in the figure below, connect the voltage output terminal of the AC voltage/current standard to the voltage input terminal of the WT210/WT230 and the voltage terminal of the standard power meter. EUT: Equipment under Test...
Page 281 In step 8 of “Adjusting the Voltage Range” described earlier, the current range on display B is set to “500.0” mA. On the WT210, the current range is set to “100.0” mA. The following procedure primarily describes the steps for the WT230.
Page 282 WT210/WT230. Connect the H terminal of the standard to the core of the EXT terminal of the WT210/WT230 and the L terminal to the shield of the EXT terminal of the WT210/WT230. On the WT230, the core of the EXT terminals and the shield of the EXT terminals of all input elements are connected collectively.
Page 283 15.1 Adjustments Repeat steps 2 to 6 to adjust channel 2. Repeat steps 2 to 6 for all channels to be adjusted. Press The SHIFT key and display C will change to “dA”. This completes the D/A output adjustments. When you press the RESET key instead of the SHIFT key, the carried out adjustments will become invalid.
Page 284: Calibration
FLUKE 9100 AC Voltage/Current Standard recommended: FLUKE 9100 or FLUKE 5700A and FLUKE 5700A + GUILDLINE 7620 Digital Power Meter recommended: Yokogawa WT2000 2ch Synchronizer recommended: Yokogawa FG120 Calibration of DC Voltage, Current and Power Wiring Connect the DC voltage and DC current standard as follows. In case of the WT230, voltages are connected parallel, and currents in series.
Page 285 • Test the voltage ranges with the current range set to 5 A. Of course testing can be carried out using other combinations as well. Set the voltage range and current range of the WT210/WT230 to the range to be calibrated.
Page 286 15.2 Calibration Calibration of AC Voltage, Current and Power Wiring Connect the Digital Power meter, Synchronizer and the AC voltage and AC current standard as follows. • Direct input EUT: Equipment under test AC voltage standard ± ± Synchronizer ± ±...
Page 287: Specifications
Set the crest factor to 3. Calibrating • Calibration of voltage and current Set the voltage range and current range of the WT210/WT230 to the range to be calibrated. Set the output voltage of the AC voltage standard so that the voltage reading on the standard power meter matches the rated voltage range of the WT210/ WT230.
Page 288 Connect the D/A output terminal corresponding to channel 1 of the external I/O connector in the same fashion as when making adjustments. Set the voltage range of the WT210/WT230 to an appropriate range. Set the output voltage of the voltage standard to match the positive rated value of the rated range of the WT210/WT230.
Page 289 15.2 Calibration Verifying of the Harmonic Measurement Function Connection Use the same instruments as in case of AC power measurement and connect them in the same way (refer to page 15-8). Preparation Set the voltage range of this instrument to 15 V, and the current range to 1 A. Turn the harmonic measurement function ON.
Page 290 Set the voltage or current range of this instrument to Auto range. When the voltage or current input is zero, the voltage and current ranges are automatically set to 15 V range and 0.5 A range (5 mA range on the WT210), respectively. Set the crest factor to 3.
Page 291: In Case Of Malfunctioning
15.3 In Case of Malfunctioning Check These Items First If the instrument does not operate properly even if the actions given in the table below are performed, contact your nearest sales representative. When contacting your representative, inform the ROM version No. which is displayed on display B on power- Symptom Items to check Section...
Page 292: Error Codes And Corrective Actions
15.4 Error Codes and Corrective Actions Error Codes for Operation and Measurement Error Code Description Corrective Action Section Received a command not used by this instrument. Check for error in the 13.1, 14.3 command sent. Parameter value specified is outside the allowed range. Correct the value.
Page 293 15.4 Error Codes and Corrective Actions Error Codes regarding Self Diagnosis Error Code Description Corrective Action Data failure of setup parameters backup. – (setup parameters other than communication parameters are set to default) EEPROM (element 1) failure. Service is required. EEPROM (element 2) failure.
Page 294: Replacing The Fuse
15.5 Replacing the Fuse WARNING • The fuse used must be of the specified rating (current, voltage, type) in order to prevent a fire hazard. • Make sure to turn OFF the power switch and to unplug the power cord from its source before replacing the fuse.
Page 295: Recommended Replacement Parts
YOKOGAWA dealer for replacement parts. Parts Name Specifications and Recommended Replacement Period Current input relay (WT210 only) This is the relay used to switch the current input circuit. The specifications of the relay are as follows: • Electric switching life: Approx. 50,000 times (at rated capacity).
Page 296: Chapter 16 Specifications
• WT210 (when the crest factor is set to 3: 0.5 A, 1 A, 2 A, 5 A, 10 A, and 20 A ranges; when the crest factor is set to 6: 0.25 A, 0.5 A, 1 A, 2.5 A, 5 A, and 10 A ranges) Input resistance: Approx.
Page 297 16.1 Input Item Specifications Instantaneous maximum Voltage allowable input Peak value of 2.0 kV or RMS value of 1.5 kV, whichever is less. (for 1 s) Current • DC input • When the crest factor is set to 3: 0.5 A, 1 A, 2 A, 5 A, 10 A, and 20 A ranges; when the crest factor is set to 6: 0.25 A, 0.5 A, 1 A, 2.5 A, 5 A, and 10 A ranges Peak value of 150 A or RMS value of 40 A, whichever is less.
Page 298: Accuracy
16.2 Accuracy Voltage and Current Accuracy Item Specifications Accuracy Requirements • Temperature: 23±5°C. • Humidity: 30 to 75%RH. • Power factor: 1 • Crest factor: 3 • Input waveform: Sine wave • Common-mode voltage: 0 V • Scaling function: OFF •...
Page 299 16.2 Accuracy Active Power Accuracy Item Specifications Accuracy Requirements Same as the conditions for voltage and current. Accuracy (3 months after calibration) Frequency Accuracy (The accuracy shown below is the sum of reading and range errors.) ±(0.3% of reading + 0.2% of range) 0.5 Hz ≤...
Page 300: Functions
Measures the peak value of voltage or current from the instantaneous voltage or instantaneous current that is sampled. Zero-level compensation Creates a zero input condition inside the WT210/WT230 and sets the level at that point as the zero level. Frequency Measurement...
Page 301 Note • The WT210/WT230 computes apparent power (VA), reactive power (var), power factor (PF), and phase angle (deg) from voltage, current, and active power through digital computation. If distorted signal is input, the value obtained on this instrument may differ from that obtained on other instruments using a different measurement principle.
Page 302 16.3 Functions Item Specifications Scaling When performing voltage or current measurements with items such as external PT, CT, shunt, and external sensor (clamp), set a scaling factor to the primary/secondary ratio. • Significant digits: Selected automatically according to significant digits in the voltage and current ranges.
Page 303 16.3 Functions Harmonic Measurement (/HRM Option) Item Specifications Measured item Select only a single wiring unit. Method PLL synchronization method Frequency range Fundamental frequency of the PLL source is in the range of 40 Hz to 440 kHz. PLL source Select voltage or current of each input element.
Page 304 16.3 Functions Item Specifications Display items During Harmonic Measurement • Display function V (voltage of harmonic signal) A (current of harmonic signal) W (active power of harmonic signal) PF (power factor of fundamental signal) V% (total harmonic distortion of voltage THD/relative harmonic content of each harmonic order) A% (total harmonic distortion of current THD/relative harmonic content of each harmonic order) W% (relative harmonic content of each harmonic order of active power) Vdeg (phase angle of each harmonic component of voltage)
Page 305 Item Specifications Measured data Number of stored data points Product Normal Harmonic measurement measurement WT210 (single-phase model, 760401) 600 blocks 30 blocks WT230 (three-phase, three-wire model, 760502) 300 blocks 30 blocks WT230 (three-phase, four-wire model, 760503) 200 blocks 30 blocks Store interval Display update rate or in the range of 1 s to 99 hrs 59 min 59 s.
Page 306: External Sensor Input (/Ex1 And /Ex2 Options)
16.4 External Sensor Input (/EX1 and /EX2 options) Item Specifications Allows input of voltage output type current sensor signal. For detailed input specifications, see section 16.1, “Input.” Measurement range of the /EX1 option: When the crest factor is set to 3: 2.5 V, 5 V, and 10 V When the crest factor is set to 6: 1.25 V, 2.5 V, and 5 V Measurement range of the /EX2 option: When the crest factor is set to 3: 50 mV, 100 mV, and 200 mV...
Page 307: Gp-Ib Interface (Standard On -C1, /C1 Option)
16.8 GP-IB Interface (standard on -C1, /C1 option) Item Specifications Electrical and mechanical Conforms to IEEE St’d 488-1978 (JIS C 1901-1987). specifications Functional specifications SH1, AH1, T5, L4, SR1, RL1, PP0, DC1, DT1, C0 Protocol Conforms to IEEE St’d 488.2-1992 (Provides communication commands other than those of the IEEE St’d 488.2 protocol.) Code ISO (ASCII) code...
Page 308: General Specifications
, 3 directions each Endurance test: Free fall test Height 100 mm, once on four sides WT210: Approx. 213 (W) × 88 (H) × 379 (D) mm External dimensions WT230: Approx. 213 (W) × 132 (H) × 379 (D) mm (excluding projections.)
Page 309 Same as the cable condition for emission above. *1 Applies to products with CE marks. For all other products, contact your nearest YOKOGAWA dealer. *2 The Overvoltage Category is a value used to define the transient overvoltage condition and includes the impulse withstand voltage regulation.
Page 310: Dimensional Drawings
16.11 Dimensional Drawings WT210 (Model: 760401) Unit: mm Rear 73 23 ±1 JIS rack mount ±1 Protruding from rack ±1 ±1 Protruding from rack ±1 482.6 EIA rack mount ±1 Protruding from rack ±1 482.6 ±1 Protruding from rack Unless other wise specified, tolerance is ±3% (However, tolerance is ±0.3mm when below 10mm)
Page 311 16.11 Dimensional Drawings WT230 (Model: 760502, 760503) Unit: mm Rear 28.5 ±1 JIS rack mount ±1 Protruding from rack ±1 ±1 Protruding from rack ±1 EIA rack mount 482.6 ±1 Protruding from rack ±1 482.6 ±1 Protruding from rack Unless other wise specified, tolerance is ±3% (However, tolerance is ±0.3mm when below 10mm) 16-16 IM 760401-01E...
Page 312 Index command ................14-5 Symbols command List (IEEE 488.2) ..........14-11 commands (before IEEE 488.2) ........13-1 <ESC>C ................11-8 commands list (before the IEEE 488.2) ......10-16 <ESC>L ................11-8 Common command group ..........14-42 <ESC>R ................11-8 common command header ..........14-5 <ESC>S ................
Page 313 Index displayed digits ..............4-32 instantaneous maximum allowable input (1 period, ..16-1 DL/DL? ................11-8 instantaneous maximum allowable input ......3-5 dual mode ................. 9-10 instantaneous maximum allowable input (for 1 s) ..... 16-2 instrument number ..............iv INTEGrate group ............. 14-25 integrated value ..............
Page 314 Index registers ................14-45 opening message .............. 3-10 RELay group ..............14-37 operating altitude ............16-13 relay output ................. 9-9 operating conditions ............16-13 remote control ..............9-3 operating restrictions ............6-10 remote control function ............1-5 operation keys ............. 2-2, 2-3 remote mode ..............
Page 315 Index temperature coefficient ........... 16-3, 16-4 FL/FL? ................13-4 terminator .............. 10-12, 11-7 H/H? .................. 13-4 three-phase, four-wire system .......... 3-12 HA/HA? ................13-4 three-phase, three-wire system ........3-12 HD/HD? ................13-4 three-voltage, three-current system ........3-12 HE/HE? ................13-4 top view ................
Page 316 Index [CONFigure]:AVERaging[:STATe] ........14-19 MEASure[:NORMal]:ITEM:<...>:ELE<emt<x> ....14-31 [CONFigure]:CFACtor? ........... 14-19 MEASure[:NORMal]:ITEM:<...>:SIGMa ......14-31 [CONFigure]:CURRent:AUTO ........14-19 MEASure[:NORMal]:ITEM:<...>? ........14-31 [CONFigure]:CURRent:ESCaling:ELEMent<x> ....14-20 MEASure[:NORMal]:ITEM:<...>[:ALL] ......14-31 [CONFigure]:CURRent:ESCaling? ......... 14-20 MEASure[:NORMal]:ITEM:{TIME|MATH} ....... 14-31 [CONFigure]:CURRent:ESCaling[:ALL] ......14-20 MEASure[:NORMal]:ITEM? ..........14-30 [CONFigure]:CURRent:RANGe ........14-20 MEASure[:NORMal]:VALue? ..........

This manual is also suitable for:

Wt230

YOKOGAWA WT210 User Manual

Startup Guide

Wiring the Circuit

Installing the WT230

Connecting the WT230 Power Supply

Turning on the Power to the WT230

Wiring the Circuit on the Primary Side of the Inverter

Wiring the Circuit on the Secondary Side of the Inverter

Selecting the Wiring System

Selecting the Measurement Range

Selecting the Voltage Range

Selecting the Current Range

Turning on the Power to the Circuit under Measurement

Displaying Voltage, Current, and Active Power

Displaying the Voltage on the Primary Side of the Inverter on Display a

Displaying the Current on the Primary Side of the Inverter on Display B

Displaying the Active Power on the Primary Side of the Inverter on Display C

Displaying the Voltage of the Secondary Side of the Inverter on Display a

Displaying the Current on the Secondary Side of the Inverter on Display B

Displaying the Active Power on the Secondary Side of the Inverter on Display C

Displaying the Efficiency

Setting the Efficiency Computation

Displaying the Efficiency

Confirming the Displayed Efficiency

Chapter 1 Functional Overview and Digital Display

Chapter 2 Names and Functions of Parts and Auto Range Monitor, Overrange

Chapter 3 Before Starting Measurements

Chapter 4 Setting Measurement Conditions and Measurement Range

Chapter 5 Displaying Measurement Results and Computation Results

Integration

Chapter 6 Integration

Chapter 7 Harmonic Measurement Function (Option)

Chapter 8 Store/Recall Function of Measured/Computed Data and Setup

Chapter 9 External In/Output Function

Chapter 10 GP-IB Interface (Option)

Chapter 11 Serial Interface (Option)

Chapter 12 Initializing Setup Parameters, Zero-Level Compensation, and Key

Chapter 15 Maintenance and Troubleshooting

Chapter 16 Specifications

Quick Links

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Summary of Contents for YOKOGAWA WT210