YOKOGAWA WT1803 User Manual
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YOKOGAWA WT1803 User Manual

Precision power analyzer
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WT1800
Precision Power Analyzer
Features Guide
IM WT1801-01EN
3rd Edition

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Summary of Contents for YOKOGAWA WT1803

  • Page 1 WT1800 Precision Power Analyzer Features Guide IM WT1801-01EN 3rd Edition...
  • Page 2 YOKOGAWA is strictly prohibited. • The TCP/IP software of this product and the documents concerning it have been developed/ created by YOKOGAWA based on the BSD Networking Software, Release 1 that has been licensed from the Regents of the University of California.

  • Page 3: Table Of Contents

    Contents Items That This Instrument Can Measure Measurement Functions Used in Normal Measurement............... 1-1 Harmonic Measurement Functions (Option) ................. 1-3 Delta Computation Functions (Option)..................1-5 Motor Evaluation Functions (Option) .................... 1-5 Auxiliary Input Measurement Functions (Option) ................1-5 High Speed Data Capturing Measurement Functios (Option) ............1-5 What Is a Measurement Function? ....................
  • Page 4 Contents Motor Evaluation Conditions (Option) Motor Evaluation Conditions and Auxiliary Input Conditions (MOTOR/AUX SET) ....... 4-1 Scaling Factor (Scaling) ........................ 4-1 Unit (Unit) ............................4-2 Input Signal Type (Sense Type) ....................4-2 Analog Input Range ........................4-3 Linear Scaling of Analog Input ...................... 4-3 Line Filter (Line Filter) ........................
  • Page 5 Contents Computation Computation (MEASURE) ......................8-1 User-Defined Functions (User Defined Function) ................. 8-1 Measuring the Average Active Power ................... 8-5 MAX Hold (Max Hold) ........................8-5 User-Defined Events (User Defined Event) .................. 8-6 Apparent Power, Reactive Power, and Corrected Power Equations (Formula) ......8-8 Sampling Frequency (Sampling Frequency).................
  • Page 6 Contents Vector Display (Option) Vector Display (OTHERS (Vector)) ..................... 13-1 Display Format (FORM) ......................13-2 Display Item (ITEM) ........................13-2 Split Display Split Display (OTHERS) ......................14-1 Split Displays with the Numeric Display (Numeric+***) ............... 14-1 Split Displays with the Waveform Display (Wave+***) ..............14-1 Split Displays with the Trend Display (Trend+***) ...............
  • Page 7 Contents Saving and Loading Data Storage Media..........................18-1 Saving Setup Data (Save Setup) ....................18-2 Saving Waveform Display Data (Save Wave) ................18-2 Saving Numeric Data (Save Numeric) ..................18-2 File Save Conditions ........................18-3 Loading Setup Data (Load Setup) ....................18-5 File Operations (Utility) .......................

  • Page 8: Items That This Instrument Can Measure

    1 Items That This Instrument Can Measure The items that you can measure with this instrument are listed below. For details about how the values of the measurement functions are determined, see appendix 1 in the getting started guide, IM WT1801-03EN. For explanations of the terms measurement function, input element, and wiring unit, see “What Is a Measurement Function?”...
  • Page 9 1 Items That This Instrument Can Measure Integrated Power (Watt hours) Function Description Input Element Wiring Unit Time Integration time Sum of positive and negative watt hours Sum of positive P values WP− Sum of negative P values Sum of positive and negative ampere hours Sum of positive I values q−...

  • Page 10: Harmonic Measurement Functions (Option)

    1 Items That This Instrument Can Measure Harmonic Measurement Functions (Option) Function Description Input Element Wiring Unit U(k) Rms voltage of harmonic order k I(k) Rms current of harmonic order k P(k) Active power of harmonic order k S(k) Apparent power of harmonic order k Q(k) Reactive power of harmonic order k λ(k)
  • Page 11 1 Items That This Instrument Can Measure Harmonic Measurement Function Orders The harmonic orders that you can specify are indicated below. Input Element Harmonic Measurement Functions Measurement Characters or Numbers in Parentheses Function Total 0 (DC) U( ) 2 to 500 I( ) 2 to 500 P( )

  • Page 12: Delta Computation Functions (Option)

    1 Items That This Instrument Can Measure Wiring Unit Harmonic Measurement Functions (Σ functions) Measurement Characters or Numbers Function in Parentheses Total UΣ( ) IΣ( ) PΣ( ) SΣ( ) QΣ( ) λΣ( ) Functions with parentheses will produce different values depending on which of the following is contained in their parentheses.

  • Page 13: What Is A Measurement Function

    1 Items That This Instrument Can Measure What Is a Measurement Function? Measurement Function The physical values (such as rms voltage, average current, power, and phase difference) that the WT1800 measures and displays are called measurement functions. Each measurement function is displayed using symbols that correspond to its physical value.

  • Page 14: Fundamental Measurement Conditions

    2 Fundamental Measurement Conditions Wiring System Settings (WIRING) The wiring system settings are listed below. • Wiring system (Wiring) • Efficiency equation (η Formula) • Independent input element configuration (Element Independent) • Delta computation (Δ Measure; option) Wiring System (Wiring) There are five wiring systems available on the WT1800.
  • Page 15 2 Fundamental Measurement Conditions Input Element Wiring system 1P2W combination Input Element Wiring system 1P2W 1P2W combination 1P3W or 3P3W:ΣA Input Element Wiring system 1P2W 1P2W 1P2W combination 1P3W or 3P3W:ΣA 1P2W 1P2W 1P3W or 3P3W:ΣA 3P4W or 3P3W:ΣA Input Element Wiring system 1P2W 1P2W...
  • Page 16 2 Fundamental Measurement Conditions Settings of Elements Grouped in a Wiring Unit independent input element configuration is off and a wiring system other than 1P2W is selected when the measurement range, valid measurement range, or valid synchronization source settings of each input element are different, these settings are changed in the manner described below: •...

  • Page 17: Efficiency Equation (Η Formula)

    2 Fundamental Measurement Conditions Efficiency Equation (η Formula) You can create an efficiency equation by combining measurement function symbols. The WT1800 can determine the energy conversion efficiency of the device using the numeric values of the measurement functions. η1 to η4 You can create four efficiency equations (η1 to η4), using the following measurement functions as operands.

  • Page 18: Independent Input Element Configuration (Element Independent)

    2 Fundamental Measurement Conditions Independent Input Element Configuration (Element Independent) In the wiring system settings, you can select whether to set the measurement range or sync source of input elements in the same wiring unit collectively or independently. Turning Independent Input Element Configuration On or Off For example, assume that the wiring system on a model with three input elements is set as follows: Input elements 1 to 3: Three-phase, four-wire system (3P4W).

  • Page 19: Delta Computation (Δ Measure; Option)

    2 Fundamental Measurement Conditions Delta Computation (Δ Measure; option) The sum or difference of the instantaneous voltage or current values (sampled data) between the elements in a wiring unit can be used to determine various types of data such as the differential voltage and phase voltage. This operation is called delta computation.
  • Page 20 2 Fundamental Measurement Conditions • Star-delta transformation (Star>Delta) You can use the data from a three-phase, four-wire system to compute the data of a delta connection from the data of a star connection. When you perform delta computation on wiring unit ΣA, the available measurement functions are as follows. ΔU1rms[UrsA], ΔU1mn[UrsA], ΔU1dc[UrsA], ΔU1rmn[UrsA], ΔU1ac[UrsA] ΔU2rms[UstA], ΔU2mn[UstA], ΔU2dc[UstA], ΔU2rmn[UstA], ΔU2ac[UstA] ΔU3rms[UtrA], ΔU3mn[UtrA], ΔU3dc[UtrA], ΔU3rmn[UtrA], ΔU3ac[UtrA]...

  • Page 21: Selecting An Element Whose Measurement Range You Want To Specify (Element)

    2 Fundamental Measurement Conditions ± ± ± ± ± ± * In the measurement functions, rms, mn(mean), dc, rmn(r-mean), and ac are the delta computation modes. A indicates the wiring unit. Click here. For information about equations, see appendix 1 in the getting started guide, IM WT1801-03EN. For information about the measurement period, see “Measurement Period.”...

  • Page 22: Selecting All Input Elements (All)

    2 Fundamental Measurement Conditions Selecting All Input Elements (ALL) At the same time, you can select the currently selected element and all elements that meet the following conditions. You can set their voltage and current ranges at the same time. Conditions for Simultaneous Element Selection •...

  • Page 23: Auto Voltage Range (Auto (V))

    2 Fundamental Measurement Conditions • To display a list of the range settings of all input elements, see “Displaying the Setup Parameter List.” You can change measurement ranges from the list. Click here. Auto Voltage Range (AUTO (V)) When you press AUTO, the AUTO key illuminates, and the range is set automatically. The measurement range is switched automatically depending on the amplitude of the input signal as described below.

  • Page 24: Current Range (Range Up/Down (A))

    2 Fundamental Measurement Conditions Current Range (RANGE UP/DOWN (A)) The current range can be fixed (when auto range is set to off) or determined automatically (when auto range is set to on). Fixed Ranges When the current range is fixed, you can select a range from the available options. The selected current range does not change even if the amplitude of the input signal changes.

  • Page 25: Power Range

    2 Fundamental Measurement Conditions Power Range The measurement ranges (power ranges) of active power (P), apparent power (S), and reactive power (Q) are as follows: Wiring System Power Range 1P2W (single-phase, two-wire system) Current range × voltage range 1P3W (single-phase, three-wire system) Voltage range ×...

  • Page 26: External Current Sensor Conversion Ratio (Sensor Ratio; Option)

    2 Fundamental Measurement Conditions External Current Sensor Conversion Ratio (SENSOR RATIO; option) Set the conversion ratio used to measure the signal received by the external current sensor input connector (EXT) from a current sensor that produces voltage. Set how many millivolts the current sensor transmits when 1 A of current is applied (conversion ratio).

  • Page 27: External Current Sensor Range Display Format (Direct/Measure; Option)

    2 Fundamental Measurement Conditions External Current Sensor Range Display Format (DIRECT/ MEASURE; option) You can select the external current sensor range display format from the following options. • DIRECT (direct input value display) Values are displayed within the external current sensor range (voltage). This setting is useful when you want to set the external current sensor range using the voltage received by the WT1800 from the external current sensor as a guide.
  • Page 28 2 Fundamental Measurement Conditions Power Coefficient (SF Scaling; scaling factor) By setting the power coefficient (SF), you can display the measured active power, apparent power, and reactive power after they have been multiplied by a coefficient. Measurement Function Data before Transformation Transformation Result Voltage U...

  • Page 29: Valid Measurement Range (Config(V)/Config(A))

    2 Fundamental Measurement Conditions Valid Measurement Range (CONFIG(V)/CONFIG(A)) You can enable or disable a measurement range by selecting or clearing its check box. The WT1800 switches between enabled measurement ranges. Disabled measurement ranges are skipped. For example, when using auto range to measure the current of a device that produces 2 A when operating and 100 mA when in standby, disable the 200 mA, 500 mA, and 1 A ranges.

  • Page 30: Crest Factor (Crest Factor)

    2 Fundamental Measurement Conditions Crest Factor (Crest Factor) The crest factor is defined as the ratio of the peak value of the waveform to the rms value. Peak value Crest factor (CF) = Rms value Peak value Rms value Input signal waveform On the WT1800, the crest factor is the ratio of the maximum applicable peak value to the measurement range.

  • Page 31: Measurement Period (Sync Source)

    2 Fundamental Measurement Conditions Measurement Period (SYNC SOURCE) Measurement Period for Measurement Functions Used in Normal Measurement The measurement period is determined by the input signal that is used as the reference (synchronization source). The measurement period is set within the data update interval between the first point where the sync source crosses the level-zero point (center of the amplitude) on a rising slope (or falling slope) and the last point where the sync source crosses the level-zero point (center of the amplitude) on a rising slope (or falling slope).

  • Page 32: Line Filter (Line Filter)

    2 Fundamental Measurement Conditions • If you specify no sync source by selecting “None,” all of the sampled data within the data update interval is used to determine the numeric data. When you are measuring DC signals, this method can be used to prevent noise from causing errors in the detection of the measurement period.

  • Page 33: Data Update Interval (Update Rate)

    2 Fundamental Measurement Conditions Data Update Interval (UPDATE RATE) The data update interval is the interval at which the data that is used in measurement functions is sampled. You can select the data update interval from the options below. 50 ms, 100 ms, 200 ms, 500 ms, 1 s, 2 s, 5 s, 10 s, and 20 s At each data update interval, the numeric data is updated, stored, transmitted through a communication interface, and converted and output as analog signals.
  • Page 34 2 Fundamental Measurement Conditions Averaging Types (Type) You can use exponential or moving averages. Exponential Averaging (Exp) With the specified attenuation constant, the numeric data is exponentially averaged according to the equation below. – D n–1 n–1 : Displayed value that has been exponentially averaged n times. (The first displayed value, D , is equal to M : Displayed value that has been exponentially averaged n –...

  • Page 35: Displaying The Setup Parameter List (Input Info)

    2 Fundamental Measurement Conditions Measurement Functions That Do Not Perform Averaging The following measurement functions do not perform averaging. Measurement Functions Used in Normal Measurement fU, fI, U+pk, U–pk, I+pk, I–pk, P+pk, P−pk, Time, WP, WP+, WP–, WPΣ, WP+Σ, WP–Σ, WS, WQ, and SyncSp (on models with the motor evaluation option) Measurement Functions Used in Harmonic Measurement (Option) ΦU(k), ΦI(k), ΦUi–Uj, ΦUi–Uk, ΦUi–Ii, ΦUj–Ij, ΦUk–Ik, fPLL1, fPLL2, EaU, and EaI...

  • Page 36: Harmonic Measurement Conditions (Option)

    3 Harmonic Measurement Conditions (Option) Harmonic Measurement Conditions (HRM SET) Using harmonic measurement, you can measure functions that are based on the voltage, current, and power harmonics and their distortion factors; on the phase angle of each harmonic relative to the fundamental; etc. You can also compute the harmonic distortion factors for voltage and current.

  • Page 37: Measured Harmonic Orders (Min Order/Max Order)

    3 Harmonic Measurement Conditions (Option) • Select a signal that has the same period as the signal that you want to measure the harmonics of. For stable harmonic measurement, choose an input signal for the PLL source that has as little distortion and fluctuation as possible.

  • Page 38: Distortion Factor Equation (Thd Formula)

    3 Harmonic Measurement Conditions (Option) Distortion Factor Equation (Thd Formula) When determining the harmonic measurement functions Uhdf, Ihdf, Phdf, Uthd, Ithd, and Pthd, you can select to use one of the denominators described below as the denominator for the equation. For information about equations, see appendix 1 in the getting started guide, IM WT1801-03EN.

  • Page 39: Anti-Aliasing Filter

    3 Harmonic Measurement Conditions (Option) Anti-Aliasing Filter When an FFT is taken through the performance of A/D conversion on a repetitive waveform, a phenomenon occurs in which frequency components that exceed half the frequency of the sampling frequency are detected as low frequency components.

  • Page 40: Motor Evaluation Conditions (Option)

    4 Motor Evaluation Conditions (Option) Motor Evaluation Conditions and Auxiliary Input Conditions (MOTOR/AUX SET) Press MOTOR/AUX SET to display a setup dialog box for the installed option. Models with the Motor Evaluation Option The MOTOR Settings dialog box appears. The WT1800 can determine the motor rotating speed, torque, and output. It determines them using the revolution sensor signal, which is proportional to the motor rotating speed, and the torque meter signal, which is proportional to the motor torque.

  • Page 41: Unit (Unit)

    4 Motor Evaluation Conditions (Option) Setting the Scaling Factor for Scaling the Torque Signal You can set the factor for scaling the torque signal to motor torque. Set the factor to a value from 0.0001 to 99999.9999. • When the Torque Signal Type is Analog This setting is used as the scaling factor in the equation for the linear scaling of analog input.

  • Page 42: Analog Input Range

    4 Motor Evaluation Conditions (Option) Common Settings Unrelated to the Signal Type • Scaling factor • Unit • Motor poles • Sync speed frequency measurement source Analog Input Range Set the analog input range for input signals whose type has been set to analog. For input signals whose type has been set to pulse, there is no need to set the analog input range.

  • Page 43: Line Filter (Line Filter)

    4 Motor Evaluation Conditions (Option) When There Is No Offset in the Input Voltages from the Revolution Sensor and Torque Meter If you set A to 1 and B to 0, the linear scaling settings do not affect computation, and the previous equation becomes: Rotating speed, torque = SX –...

  • Page 44: Synchronization Source (Sync Source)

    4 Motor Evaluation Conditions (Option) Synchronization Source (Sync Source) • When you are measuring analog revolution and torque signals, you can select the element to use as the sync source from the following options. The available options vary depending on the installed elements. U1, I1, U2, I2, U3, I3, U4, I4, U5, I5, U6, I6, Ext Clk (external clock), and None * For the EXT CLK connector specifications, see section 4.3 in the getting started guide, IM WT1801-03EN.
  • Page 45 4 Motor Evaluation Conditions (Option) Positive and Negative Rated Torque Signal Pulse Frequencies (Rated Freq Upper, Rated Freq Lower) Range: 1 to 100000000 (Hz) The following equation is used to compute the torque. Torque = S(AX + B) – NULL The scaling factor The torque pulse coefficient The pulse frequency...

  • Page 46: Revolution Signal Pulses Per Revolution (Pulse N)

    4 Motor Evaluation Conditions (Option) The pulse input range setting applies to input signals whose type has been set to pulse. For input signals whose type has been set to analog, there is no need to configure this setting. Revolution signal pulses per revolution (Pulse N) Set the number of pulses per revolution to a value from 1 to 9999.

  • Page 47: Electrical Angle Measurement (Electrical Angle Measurement)

    4 Motor Evaluation Conditions (Option) Slip Equation –1 The sync speed unit is fixed at min or rpm. To determine the slip, configure the rotating speed scaling factor –1 that the unit of the rotating speed is also min (or rpm). SyncSp−Speed Slip (%) = ×100...

  • Page 48: Motor Efficiency And Total Efficiency Computation

    4 Motor Evaluation Conditions (Option) Motor Efficiency and Total Efficiency Computation The WT1800 can compute the motor efficiency (the ratio of power consumption to motor output) and total efficiency from the active power and motor output that it measures. You can set the efficiency equation using the η...

  • Page 49: Auxiliary Input Conditions (Option)

    5 Auxiliary Input Conditions (Option) Auxiliary Input Conditions (MOTOR/AUX SET) You can apply the signals of sensors, such as luminance, wind-power, or temperature sensors, to the AUX1 and AUX2 connectors, and display the physical values measured by the sensors. You can configure the following auxiliary input settings.

  • Page 50: Linear Scaling Of Analog Input

    5 Auxiliary Input Conditions (Option) Linear Scaling of Analog Input You can set the slope and the offset value of the auxiliary input using one of the following two methods. • Set the values manually. • Specify two points, and use those points to compute the values Manually Setting the Auxiliary Input Slope and Offset (Linear Scale A, B) You can set the slope (A) and offset (B) of the auxiliary input to values within the following ranges.

  • Page 51: Line Filter (Line Filter)

    5 Auxiliary Input Conditions (Option) Line Filter (Line Filter) You can remove high-frequency noise by inserting a line filter into the circuit used to measure the Aux1 and Aux2 auxiliary inputs. You can select the cutoff frequency from the following options. OFF, 100 Hz, and 1 kHz Selecting OFF disables the filter.

  • Page 52: Holding Measured Values And Performing Single Measurements

    6 Holding Measured Values and Performing Single Measurements Holding Measured Values (HOLD) The hold operation stops data measurement and display operations for each data update interval and holds the display of all measurement function data. The D/A output values, the values in the data lists printed by the built- in printer, and the communication values all reflect the held values.

  • Page 53: Numeric Data Display

    7 Numeric Data Display Numeric Data Display (NUMERIC) You can press NUMERIC to make the numeric data display appear. Each time you press NUMERIC the display format switches in order between 4 Items, 8 Items, 16 Items, Matrix, All Items, Hrm List Single, Hrm List Dual, and Custom. Display Format (FORM) The display format options vary depending on the current display.
  • Page 54 7 Numeric Data Display Single Harmonics List Display (Hrm List Single; option) • When the display mode is Numeric, up to 42 of the harmonic order data items of a single measurement function are displayed in two columns. • When the display is split, up to 22 of the harmonic order data items of a single measurement function are displayed in two columns.

  • Page 55: Switching The Displayed Page (Page Up

    7 Numeric Data Display Custom Display (Custom) You can use an illustration (.BMP) or picture (.BMP) from a PC or other device as the background of the display. You can arrange numeric data boxes on top of this background to create a custom display. Numeric data appears in this custom display.

  • Page 56: Number Of Displayed Digits (Display Resolution)

    7 Numeric Data Display Number of Displayed Digits (Display Resolution) The number of displayed digits (display resolution) for voltage, current, active power, apparent power, reactive power, and so on is as follows: • If the value is less than or equal to 60000: Five digits. •...

  • Page 57: 8-, And 16-Value Displays (4 Items/8 Items/16Items)

    7 Numeric Data Display Notes about the Numeric Data Display • “-------” is displayed if a measurement function is not selected or if there is no numeric data. • If Urms, Umn, Udc, Urmn, Uac, Irms, Imn, Idc, Irmn, or Iac exceeds 140% of the measurement range, “-OL-” is displayed to indicate an overload value.
  • Page 58 7 Numeric Data Display Element (Element/Σ) • You can select the element/wiring unit from the options below. The available options vary depending on the installed elements. Element1, Element2, Element3, Element4, Element5, Element6, ΣA, ΣB, and ΣC • If the selected wiring unit does not have any elements assigned to it, because there is no data, “-------” (no data) is displayed.

  • Page 59: Matrix Display (Matrix)

    7 Numeric Data Display Matrix display (Matrix) Item Number to Set (Item No.) This is the same as setting the item number in the 4-, 8-, and 16-value displays. Click here. Function (Function) This is the same as setting the function in the 4-, 8-, and 16-value displays. Click here.

  • Page 60: All Items Display (All Items)

    7 Numeric Data Display All Items Display (All Items) You cannot change individual measurement functions. Change the display by pressing PAGE UP and PAGE DOWN or the up and down cursor keys. The number of displayed pages varies as indicated below depending on the installed options. Harmonic Measurement Option or Simultaneous Dual Harmonic Measurement Option Installed...

  • Page 61: Single Harmonics And Dual Harmonics Lists (Hrm List Single/Dual; Option)

    7 Numeric Data Display Single Harmonics and Dual Harmonics Lists (Hrm List Single/ Dual; option) For each measurement function, you can display the numeric data for a harmonic order from 0 (DC) to 500 or for all harmonic orders in two columns. This item is available on models with the harmonic measurement option or the simultaneous dual harmonic measurement option.

  • Page 62: Custom Display (Custom)

    7 Numeric Data Display Custom Display (Custom) Loading a Display Configuration File (Load Items) On the file list, specify a file to load display configuration data from. The extension is .TXT. For information about how to configure the file list display and how to operate files and folders, see “File Operations (Utility).”...
  • Page 63 7 Numeric Data Display Customizing the Displayed Items (Custom Items) • Item Number to Set (Item No.) Select the number of the item that you want to configure. • Function (Function) This is the same as setting the function in the 4-, 8-, and 16-value displays. Click here.
  • Page 64 7 Numeric Data Display Saving the Display Configuration (Save Custom Items) You can save the display configuration that you have created to the specified storage medium. The extension is .TXT. • Displaying a File List and Specifying the Save Destination (File List) On the file list, specify the save destination.

  • Page 65: Computation

    8 Computation Computation (MEASURE) You can set the following items. • User-defined functions (User Defined Function) • Measuring the Average Active Power • MAX hold (Max Hold) • User-defined events (User Defined Event) • Apparent power, reactive power, and corrected power equations (Formula) •...
  • Page 66 8 Computation Expression (Expression) Operation Type You can use combinations of measurement functions and element numbers (e.g., Urms1) as operands to configure up to 20 equations (F1 to F20). There can be up to 16 operands in 1 equation. The different types of operands are listed below (measurement function: operand). •...
  • Page 67 8 Computation • Delta Computation (Option) Δ Δ Δ U1( ): DELTAU1( ) I( ): DELTAI( ) P1( ): DELTAP1( ) Δ Δ ––– U2( ): DELTAU2( ) P2( ): DELTAP2( ) Δ ––– Δ U3( ): DELTAU3( ) P3( ): DELTAP3( ) Δ...
  • Page 68 8 Computation Values Substituted in Operands • The unit of TI values is seconds. • η1 to η4 are displayed as percentages (see in appendix 1 in the getting started guide, IM WT1801-03EN). However, in this section ETA1 to ETA4 are described as ratios. Example When η1 is 80%, ETA1 is 0.8 •...

  • Page 69: Measuring The Average Active Power

    8 Computation If an operand in an equation is undetermined, the computed result is displayed as “-------” (no data). This occurs when a delta computation measurement function is in the equation, but delta computation is turned OFF, or when a measurement function of an element that is not installed is in the equation. Measuring the Average Active Power The average active power can be computed for devices, such as intermittent control devices, whose power fluctuates.

  • Page 70: User-Defined Events (User Defined Event)

    8 Computation User-Defined Events (User Defined Event) User-defined events can be used to trigger data storage and automatic printing (option). You can define up to eight user-defined events. User-Defined Event Number (Event No.) Select a user-defined event number from 1 to 8. Turning User-Defined Events On and Off Select whether to enable user-defined events.
  • Page 71 8 Computation For example, a condition that is true when 150 < the measured power value of element 1 < 160 W and false otherwise would be configured as shown below. Condition (Condition) Specify the judgment condition here when you have set the judgment condition specification method to Condition.

  • Page 72: Apparent Power, Reactive Power, And Corrected Power Equations (Formula)

    8 Computation Apparent Power, Reactive Power, and Corrected Power Equations (Formula) Equation for Apparent Power (S Formula) You can select the voltage and current to use to compute the apparent power (voltage × current) from the following options. • Urms*Irms The product of the true rms values of the voltage and current •...

  • Page 73: Sampling Frequency (Sampling Frequency)

    8 Computation Type 3 (The method used in the harmonic measurement modes of the WT1600, WT3000 and PZ4000) The WT1800 calculates the reactive power of each phase using equation 2 and calculates the three-phase apparent power using equation 4. This equation is available on models with the harmonic measurement option or the simultaneous dual harmonic measurement option.

  • Page 74: Phase Difference Display Format (Phase)

    8 Computation Phase Difference Display Format (Phase) The phase difference Φ between the voltage and current indicates the current phase relative to the voltage of each element. Set the display format to one of the options below. • 180 degrees If the current phase is in the counterclockwise direction with respect to voltage, the current is leading (D) the voltage.

  • Page 75: Voltages Or Currents Whose Frequencies Will Be Measured (Freq Measure)

    8 Computation Voltages or Currents Whose Frequencies Will Be Measured (FREQ MEASURE) Select the three voltages or currents to measure the frequencies of from the options below. The available options vary depending on the installed elements. U1, I1, U2, I2, U3, I3, U4, I4, U5, I5, U6, and I6 On models with the add-on frequency measurement option, the frequencies of the voltages and currents of all elements can be measured, so there is no need to set which frequencies to measure.

  • Page 76: Integrated Power (Watt Hours)

    9 Integrated Power (Watt hours) The WT1800 can integrate the active power (watt hour), the current (ampere hour), the apparent power (volt- ampere hour), and the reactive power (var hour) values. For a list of the measurement functions related to integrated power (watt hours) and their descriptions, see “Items That This Instrument Can Measure.”...

  • Page 77: Number Of Displayed Digits (Display Resolution)

    9 Integrated Power (Watt hours) Example of the Display When Independent Integration Is Enabled The integration status of the input Integration status element or wiring unit selected with of each element the ELEMENT key for setting ranges. When a wiring unit is selected, the element number at the top is the number of the smallest input element in the wiring unit.
  • Page 78 9 Integrated Power (Watt hours) Sample Rate, and Valid Frequency Ranges for Integration The sample rate is approximately 2 MHz. The voltage/current signal frequencies that are valid for integration are as follows: Integrated Item Valid Frequency Range for Integration Active power DC to approximately 1 MHz Current When integrating Irms...

  • Page 79: Enabling Or Disabling Independent Integration (Independent Control)

    9 Integrated Power (Watt hours) Enabling or Disabling Independent Integration (Independent Control) You can select whether to start, stop, and reset integration on all elements simultaneously or separately. • OFF: Integration starts, stops, and is reset simultaneously on all elements. •...

  • Page 80: Starting, Stopping, And Resetting Integration (Start/Stop/Reset)

    9 Integrated Power (Watt hours) Starting, Stopping, and Resetting Integration (Start/Stop/Reset) You can start, stop, and reset integration using the soft keys on the front panel or communication commands. The relationships between integration and starting, stopping, and resetting are indicated below. Time up Integrated value...
  • Page 81 9 Integrated Power (Watt hours) Resetting Integration (Reset) The integration time and integrated value are reset. The STOP indicator turns off. The displays for integration- related functions change to “-----------” (no data). When an integration error occurs, the START and STOP indicators blink, and the integration status indication is “Error.”...

  • Page 82: Integration Conditions (Integ Set)

    9 Integrated Power (Watt hours) Integration Conditions (Integ Set) You can configure the following integration conditions. • Integration mode (Mode) • Integration timer (Integ Timer) • Scheduled times for real-time integration (Real-time Control) • Integration auto calibration on/off (Auto Cal) •...
  • Page 83 9 Integrated Power (Watt hours) Normal Integration Mode (Normal) You can set a relative integration time (set a timer). Integration starts when you press Start. When one of the conditions below is met, integration is stopped, and the integration time and integrated value are held. •...
  • Page 84 9 Integrated Power (Watt hours) Real-Time Normal Integration Mode (R–Normal) Set the date and time when integration starts and stops and the duration of integration. Integration starts at the scheduled start time. When one of the conditions below is met, integration is stopped, and the integration time and integrated value are held.

  • Page 85: Integration Timer (Integ Timer)

    9 Integrated Power (Watt hours) Integration Timer (Integ Timer) You can set the hour, minute, and second within the following range. 00000:00:00 to 10000:00:00 When Independent Integration Is Disabled The integration timer that you specified above applies to every element. When Independent Integration Is Enabled •...

  • Page 86: Integration Auto Calibration On/Off (Auto Cal)

    9 Integrated Power (Watt hours) Integration Auto Calibration On/Off (Auto Cal) Ordinary zero-level compensation takes place when the measurement range or line filter is changed, but you can also automatically calibrate the zero level during integration. • ON: Zero-level compensation takes place approximately once every hour during integration. •...

  • Page 87: Rated Time Of Integrated D/A Output (D/A Output Rated Time; Option)

    9 Integrated Power (Watt hours) Rated Time of Integrated D/A Output (D/A Output Rated Time; Option) This setting appears on models with the 20-channel D/A output option. When integrated values are output through output, a rating value (the same value as the measurement range) is continuously applied, the integrated value after the specified amount of time has elapsed is taken to be 100%, and the D/A output at that point is 5 V.

  • Page 88: Waveform Display

    10 Waveform Display Waveform Display (WAVE) You can press WAVE to make the waveform displays of the following types of input signals. • Input element voltage and current • Motor evaluation function (option) speed and torque • Auxiliary inputs (option) Aux1 and Aux2 Each time you press WAVE, the number of split screens switches in order between none, 2, 3, 4, and 6.

  • Page 89: Display Format (Form)

    10 Waveform Display Display Format (FORM) You can configure the following display format settings. • Number of windows (Format) • Time axis (Time/div) • Trigger (Trigger Settings) • Advanced waveform display settings (Display Settings) • Waveform mapping (Wave Mapping) Number of Windows (Format) You can divide the screen equally into windows, and assign waveforms to those windows.
  • Page 90 10 Waveform Display Difference between Waveform Sampling Data and Waveform Display Data Waveform sampling data and waveform display data are both measured waveform data, but they differ as described below. • Waveform sampling data: Data derived through A/D conversion of the input signal The WT1800 A/D conversion rate is approximately 2 MS/s.

  • Page 91: Vertical Axis (Amplitude)

    10 Waveform Display Aliasing When the sample rate is low compared to the frequency of the input signal, the high frequency components of the signal are lost. In accordance with the Nyquist sampling theorem, the high frequency components in the signal are misread as low frequency components.

  • Page 92: Trigger (Trigger Settings)

    10 Waveform Display Trigger (Trigger Settings) The trigger determines when a waveform is displayed. A trigger is said to “occur” when the trigger condition is met and a waveform is displayed. Trigger Mode (Mode) The trigger mode determines the conditions for updating the display. Select from the following options. •...
  • Page 93 10 Waveform Display Trigger level Trigger source The WT1800 triggers here (the trigger point) when the trigger edge is set to rising ( ). • Measurement range: 100 Vrms or 50 Vrms when the crest factor is set to CF3 or CF6, respectively. •...

  • Page 94: Advanced Waveform Display Settings (Display Settings)

    10 Waveform Display Advanced Waveform Display Settings (Display Settings) Display Interpolation (Interpolate) When there are less than 800 points of sampled data on the time axis, the displayed points (rasters) do not connect with each other. Numbers of sampled points below 800 are said to be within the interpolation range. Display interpolation is a feature that connects the points linearly so that the waveform display is smooth.

  • Page 95: Waveform Mapping (Wave Mapping)

    10 Waveform Display Waveform Mapping (Wave Mapping) Assignment Method (Mode) You can assign waveforms to windows on the screen. Choose one of the following methods for assigning the waveforms to the windows. • Auto The waveforms whose displays are turned on are assigned in order according to their element numbers, with an element’s voltage waveform (U) coming first, followed by its current (I), speed, torque, Aux1, and then 1, 2 Aux2 waveform.
  • Page 96 10 Waveform Display Vertical Position (Vertical Position) You can vertically shift the displayed position (vertical position) of a waveform. This is useful when you want to view the relationship between voltage and current waveforms, or when the section of the waveform that you want to view does not fit into the display frame.

  • Page 97: Trend Display

    11 Trend Display Other Displays (OTHERS) You can press OTHERS to make the following displays appear. • Trend display (Trend) • Bar graph display (Bar) • Vector display (Vector) • Split display (with the numeric value display; Numeric+***) • Split display (with the waveform display; Wave+***) •...

  • Page 98: Display Format (Form)

    11 Trend Display Display Format (FORM) Number of Trend Display Windows (Format) You can choose the number of windows from one of the following options: • Single: No windows • Dual: Two windows • Triad: Three windows • Quad: Four windows Depending on the number of windows, the number of displayed points in each window changes as described below.

  • Page 99: Display Item (Item)

    11 Trend Display Display Item (ITEM) Turning Trend Displays On and Off Display (The upper left of the list) You can set whether to display (All ON) or hide (All OFF) all trends, from trend 1 (T1) to trend 16 (T16). Trend Numbers (T1 to T16) You can select whether to display each trend, from trend 1 (T1) to trend 16 (T16), by selecting or clearing its check box.

  • Page 100: Bar Graph Display (Option)

    12 Bar Graph Display (Option) Bar Graph Display (OTHERS (Bar)) On models with the harmonic measurement option or the simultaneous dual harmonic measurement option, you can display harmonics using bar graphs. The harmonic orders are lined up on the horizontal axis, and the vertical axis represents the amplitude of each harmonic.

  • Page 101: Display Item (Item)

    12 Bar Graph Display (Option) Bar Graph Display Range (Start Order/End Order) • You can configure the range of harmonic orders to show in a bar graph. • The range is the same for bar graphs 1 to 3. Starting Harmonic Order (Start Order) •...

  • Page 102: Vector Display (Option)

    13 Vector Display (Option) Vector Display (OTHERS (Vector)) On models with the harmonic measurement option or the simultaneous dual harmonic measurement option, you can select a wiring unit to display vectors of the phase differences and amplitudes (rms values) of the fundamental signals, U(1) and I(1), in each element in the unit.

  • Page 103: Display Format (Form)

    13 Vector Display (Option) Display Format (FORM) Number of Vector Display Windows (Format) You can choose the number of windows from one of the following options: • Single: No windows. The data of vector (Item No.) 1 is displayed. • Dual: Two windows. The data of vectors (Item No.) 1 and 2 is displayed. However, in the split display, the data of vector 1 is displayed.

  • Page 104: Split Display

    14 Split Display Split Display (OTHERS) You can split the screen into top and bottom halves, and select a display to show in each half. You can select the following items. • Split displays with the numeric display (Numeric+***) • Split displays with the waveform display (Wave+***) •...

  • Page 105: Cursor Measurement

    15 Cursor Measurement Cursor Measurement (CURSOR) You can place cursors on displayed waveforms, trends, and bar graphs and display the values at the cursor locations. Example of cursors in the waveform display Cursor 2 Cursor 1 You can set the following items. •...

  • Page 106: Cursor Path (Cursor Path)

    15 Cursor Measurement Cursor Path (Cursor Path) Because the WT1800 uses P-P compression on sampled data, two values (a maximum and a minimum value) are displayed at each time-axis point. You can choose the path that the cursors move through and the data points that are measured by the cursors from one of the options below.
  • Page 107 15 Cursor Measurement In the Trend Display The vertical-axis (Y-axis) value of cursor 1 (+) The vertical-axis (Y-axis) value of cursor 2 (x) ΔY The difference between the vertical-axis (Y-axis) values of cursor 1 (+) and cursor 2 (x) The horizontal-axis (X-axis) value of cursor 1 (+) With the left edge of the screen being 0 seconds, the time from the left edge of the screen is indicated.

  • Page 108: Cursor Movement

    15 Cursor Measurement Cursor Movement In the Waveform Display • Cursors move along the selected waveform. • The unit of cursor movement is the amount of time contained in one screen ÷ 800. • If immeasurable data exists, “***” is displayed in the measured value display area. •...

  • Page 109: 16 High Speed Data Capturing

    16 High Speed Data Capturing High Speed Data Capturing (OTHERS(High Speed Data Capturing)) Models with the high speed data capturing option can measure every 5 ms and save the measured data to a file. Also, you can synchronize the WT1800 with another device during measurement by applying an external sync signal to the external start signal I/O (MEAS START) connector.
  • Page 110 16 High Speed Data Capturing File Recording State This indication appears when you set Record to File to ON. • Ready • “Ready” appears when recording to a file is possible and the WT1800 is ready to begin high speed data capturing.
  • Page 111 16 High Speed Data Capturing Data Capturing Interval The interval at which data is captured varies as shown below depending on how External Sync is set. • When External Sync is set to OFF: 5 ms • When External Sync is set to ON: The interval at which data is captured depends on the sync signal that is applied to the external start signal I/O (MEAS START) connector.

  • Page 112: High Speed Data Capturing (Hs) Settings (Form)

    16 High Speed Data Capturing Line Filter for High Speed Data Capturing • You can also set a line filter for high speed data capturing. The setting is not shared with normal measurement. Even if you change the line filter setting during high speed data capturing, the line filter setting for normal measurement will remain unchanged.

  • Page 113: Capture Control Settings (Control Settings)

    16 High Speed Data Capturing Capture Control Settings (Control Settings) Voltage and Current Measurement Modes (U/I Measuring Mode) Select the modes for measuring voltage and current. Setting Select the method for setting the voltage and current measurement modes from the following options. •...
  • Page 114 16 High Speed Data Capturing Trigger (Trigger Settings) The trigger is what starts high speed data capturing. The act of starting high speed data capturing when the trigger conditions are met is referred to as “triggering.” All the trigger settings for high speed data capturing are shared with those for displaying waveforms. If you change these settings in the menu for high speed data capturing, the waveform display trigger settings will also change.

  • Page 115: Recording To A File (Record To File)

    16 High Speed Data Capturing Recording to a File (Record to File) • If you set Record to File to ON, when high speed data capturing starts, the WT1800 saves the following two files in binary format. • High speed data capturing data file (.WTS): The measured data is saved to this file. •...

  • Page 116: Save Conditions (File Settings)

    The WT1800 will not create a CSV file whose size exceeds 2 GB but will instead create a CSV file for 2 GB worth of captured data. To convert the data into a CSV file whose size exceeds 2 GB, use the file reader software available from the following Yokogawa webpage. http://www.yokogawa.com/jp-ymi/tm/F-SOFT/wtfs/wtfs1.htm Saved Items (Item Settings) Select whether to store a numeric data item by selecting or clearing its check box.

  • Page 117: Starting And Stopping High Speed Data Capturing (Start/Stop)

    16 High Speed Data Capturing Manually Converting to CSV Format (CSV Convert) You can convert the selected high speed data capturing data to ASCII format (.csv). This menu item appears when you press File List to display the file list. •...
  • Page 118 16 High Speed Data Capturing High Speed Data Capturing Operations Examples for when the trigger mode is Auto or Normal. Trigger Data wait capturing High speed data capturing Ready Start Ready state (HS State) File recording state Ready Ready (File State) Time Completion of Start key...

  • Page 119: Display Items (Item)

    16 High Speed Data Capturing Display Items (ITEM) Number of Columns (Column Num) You can select four or six columns. Column Number (Column No.) Select the number of the column that you want to configure. Element (Element/Σ) This is the same as the element (Element/Σ) item in the Matrix display. Click here.

  • Page 120: 17 Data Storage

    17 Data Storage You can store numeric data in binary format to the internal RAM disk or a USB memory device. You can store the data at the data update interval or at a specified time interval (if the waveform display is enabled and the trigger mode is set to Auto or Normal, the data update interval depends on the trigger operation).

  • Page 121: Storage Control (Control Settings)

    17 Data Storage Storage Control (Control Settings) Storage Mode (Store Mode) You can choose from one of the following methods for starting and stopping storage. • Manual (Manual storage mode) When you press STORE START, numeric data is stored at the storage interval for the number of times specified by the storage count.
  • Page 122 17 Data Storage • If you enable automatic CSV conversion (Auto CSV Conversion) and set the storage destination to a USB memory device, the maximum storage count is computed with 20% of the available USB memory designated as valid for stored data (*.WTS and *.HDS files). •...

  • Page 123: Stored Items (Item Settings)

    17 Data Storage Stored Items (Item Settings) You can set which numeric data items to store. You can choose to store the displayed numeric items (Displayed Numeric Items) or the selected items (Selected Items). Displayed Numeric Items (Displayed Numeric Items) The numeric data items displayed on the screen are stored.

  • Page 124: Save Conditions (File Settings)

    17 Data Storage Save Conditions (File Settings) • Stored measurement data is saved to files in binary format (with .wts extensions). • Measurement conditions, settings, and storage information are saved in binary format to header files (with .hds extensions). • File name extensions are added automatically. •...

  • Page 125: Starting, Stopping, And Resetting Storage (Store Start, Store Stop, And Store Reset)

    17 Data Storage • Data storage may fail under the following circumstances. When this happens, an asterisk appears in the storage state indication. The storage count includes the missing stored data. • When you perform consecutive operations in the setup menu. •...
  • Page 126 17 Data Storage Stopping Storage (STORE STOP) • You can temporarily stop storage by pressing STORE STOP. • When storage stops, the STORE STOP key blinks, and “Store:Stop” appears in the upper left of the screen. • When the storage count is zero and the WT1800 is in a storage-ready state (Ready) and you press STORE STOP, storage is reset.

  • Page 127: Storage Operations In Each Storage Mode

    17 Data Storage Storage Operations in Each Storage Mode Manual (Manual storage mode) STORE STOP STORE START State Start Cmpl Time STORE START Storage count STORE RESET Real Time (Real-time storage mode) STORE START STORE STOP STORE START blinking State Cmpl Ready Start...
  • Page 128 17 Data Storage Single Shot (Single-shot storage mode) STORE STOP STORE START State Cmpl Start Time STORE RESET Storage count STORE START Storage Operations Performed When You Press STORE STOP After Storage Has Been Started Restarting Storage When you press STORE START, STORE STOP, and then STORE START STORE STOP STORE START STORE START...
  • Page 129 17 Data Storage When the Storage Mode Is Integ Sync and the Integration Mode Is Continuous or R-Continuous Storage is performed at the first data update after the storage interval passes. Storage continues even when integration is reset by the integration timer. When the integration timer is reset, the storage interval timer is also reset.

  • Page 130: 18 Saving And Loading Data

    18 Saving and Loading Data You can save numeric data, waveform display data, screen image data, and setup parameters to USB memory or a network drive. For information about saving screen image data, see “Saving Screen Images” Click here. You can load the setup data from a storage medium into the WT1800. You can also rename, copy, and delete data files.

  • Page 131: Saving Setup Data (Save Setup)

    18 Saving and Loading Data Notes about Using USB Devices • Connect the USB memory device to the USB port for peripherals (type A) directly, not through a USB hub. • Use portable USB storage media that are compatible with USB Mass Storage Class version 1.1. •...

  • Page 132: File Save Conditions

    18 Saving and Loading Data File Save Conditions Displaying a File List and Specifying the Save Destination (File List) On the file list, specify the save destination. For information about how to configure the file list display and how to operate files and folders, see “File Operations (Utility).” Click here.
  • Page 133 18 Saving and Loading Data Automatic File Naming (Auto Naming) Numbering (Numbering) The WT1800 automatically adds a four-digit number from 0000 to 0999 after the common name specified using the File Name setting and saves files. Date (Date) The date and time when the file is saved are used as its name. The file name specified for the File Name setting is ignored.

  • Page 134: Loading Setup Data (Load Setup)

    Because the header files saved by the WT1800 use a format that is common to YOKOGAWA measurement devices, they contain some data that is not used by the WT1800.

  • Page 135: File Operations (Utility)

    18 Saving and Loading Data File Operations (Utility) You can perform file operations such as creating folders on the storage medium, deleting and copying files, and changing file names. Us the up and down cursor keys to select from the file list the file or folder that you want to perform an operation Storage Media Displayed in the File List Click here.
  • Page 136 18 Saving and Loading Data File Selection (Set/Reset) Select or deselect files and folders. Selecting multiple files is useful when you want to copy or delete multiple files at the same time. Simultaneous File Selection (All Set/All Reset) • Selecting All Files (ALL Set) When the cursor is on a drive or folder in the file list, select ALL Set to select all of the files and folders within the drive or folder that the cursor is on.

  • Page 137: 19 Saving Screen Images

    19 Saving Screen Images You can save screen image data to files in BMP, PNG, and JPEG formats. Conditions for Saving Screen Image Data (IMAGE SAVE MENU) File List Display and Save Destination Settings (File List) On the file list, specify the save destination. For information about how to configure the file list display and how to operate files and folders, see “File Operations (Utility).”...

  • Page 138: Printing Screen Images And Numeric Data (Option)

    20 Printing Screen Images and Numeric Data (Option) You can use the built-in printer to print screen images and numeric data lists. You can also add comments to screen images. If you use automatic printing, screen images and numeric data lists are printed automatically at the specified print interval.

  • Page 139: Automatic Printing Execution (Auto Print On)

    20 Printing Screen Images and Numeric Data (Option) Automatic Printing Execution (Auto Print ON) Enable automatic printing. When you enable automatic printing, the timing at which printing occurs and at which the PRINT key illuminates varied depending on the print mode. For details, see “Print Timing for Different Print Modes.”...

  • Page 140: Comment (Comment)

    20 Printing Screen Images and Numeric Data (Option) • If you specify a number of measurement functions as items to be printed, it may take a long time to print the data. Set the print interval to a time that is longer than the time required to print the data. •...

  • Page 141: Print Timing For Different Print Modes

    20 Printing Screen Images and Numeric Data (Option) Print Timing for Different Print Modes The timings at which automatic printing can be executed are indicated below. Interval Print Mode When the scheduled start time is before Auto Print ON Auto Print Auto Print PRINT key PRINT key...
  • Page 142 20 Printing Screen Images and Numeric Data (Option) Integration Synchronization Print Mode Printing is executed in sync with the integration start time. When integration starts before Auto Print ON Integration Auto Print Forced Auto Print integration stop start PRINT key PRINT key PRINT key blinking...

  • Page 143: Printing (Print)

    20 Printing Screen Images and Numeric Data (Option) Event Synchronization Print Mode Printing is executed whenever a user-defined event occurs. When the time it takes to print is shorter than the data update interval Auto Print Auto Print PRINT key PRINT key Event occurrence...

  • Page 144: Ethernet Communication (Network)

    21 Ethernet Communication (Network) You can configure TCP/IP parameters and use the optional Ethernet interface to perform the following tasks. TCP/IP TCP/IP settings for connecting to an Ethernet network. Set the IP address, subnet mask, and default gateway. Click here. FTP Server (FTP Server) You can connect the WT1800 as an FTP server to a network.

  • Page 145: Tcp/Ip (Tcp/Ip)

    21 Ethernet Communication (Network) TCP/IP (TCP/IP) Configure the settings that the WT1800 needs to connect to a network. DHCP DHCP is a protocol that temporarily allocates settings that a PC needs to connect to the Internet. To connect to a network that has a DHCP server, turn the DHCP setting on. When DHCP is turned on, the IP address can be automatically obtained when the WT1800 is connected to a network.

  • Page 146: Ftp Server (Ftp Server)

    21 Ethernet Communication (Network) FTP Server (FTP Server) You can connect the WT1800 as an FTP server to a network. Set the user name and password that will be used by devices on the network to access the WT1800. Also, set the access timeout value.

  • Page 147: Network Drive (Net Drive)

    21 Ethernet Communication (Network) Network Drive (Net Drive) You can save the WT1800’s setup data, numeric data, waveform display data, and screen image data to a network drive. You can also load the setup data from a network drive into the WT1800. FTP Server (FTP Server) Specify the IP address of an FTP server on the network.

  • Page 148: Sntp (Sntp)

    21 Ethernet Communication (Network) SNTP (SNTP) The WT1800 clock can be set using Simple Network Time Protocol (SNTP). When the WT1800 is turned on, the date and time are set automatically. SNTP Server (SNTP Server) Specify the IP address of the SNTP server that the WT1800 will use. In a network with a DNS server, you can specify the host name and domain name instead of the IP address.

  • Page 149: Utility

    22 Utility Utility (UTILITY) You can specify the following settings. Overview (System Overview) You can view the WT1800 system and setup information. Click here. Initializing the Settings (Initialize Settings) You can reset the WT1800 settings to their factory default values. Click here.

  • Page 150: Overview (System Overview)

    22 Utility Overview (System Overview) You can display the following information about the WT1800. Item Description Model The model number Suffix The suffix code The instrument number Version The firmware version Element Configuration The input element type Options The options Link Date The firmware date Product ID...

  • Page 151: Remote Control (Remote Control)

    To remotely control the WT1800 using communication commands through the USB port, select USBTMC, and then carry out the following procedure. • Install the YOKOGAWA USB TMC (Test and Measurement Class) driver on your PC. For information about how to obtain the YOKOGAWA USB TMC driver, contact your nearest YOKOGAWA dealer. You can also access the YOKOGAWA USB driver download webpage and download the driver (http://tmi.yokogawa.com/...
  • Page 152 22 Utility Network Connects the WT1800 to a PC using Ethernet. IP Address (IP Address) Displays the TCP/IP setting that you specified in the Ethernet communication settings. Click here. Timeout (Time Out) If a connection cannot be established between the WT1800 and the PC within the amount of time specified here, the WT1800 aborts the connection process.

  • Page 153: System Configuration (System Config)

    22 Utility System Configuration (System Config) You can specify the following settings. • WT1800 date and time • Language • LCD adjustment • USB keyboard language • Environment settings (Preference) • Crest factor Date and Time Settings (Date/Time) The WT1800 date and time. Turning the Display On and Off (Display) Set whether to show the date and time on the WT1800.
  • Page 154 22 Utility Language (Language) Set the language that is used in the setup menus and messages. Menu Language (Menu Language) You can choose to display menus using one of the following languages. • English • Japanese • Chinese • German Message Language (Message Language) Error messages appear when errors occur.
  • Page 155 22 Utility The display data that corresponds to CH1 to CH16 in the waveform, trend, and vector displays is indicated below. Waveform Display Trend Display Vector Display CH10 CH11 CH12 CH13 Speed/Aux1 ––– CH14 Torque/Aux2 ––– CH15 ––– ––– CH16 –––...

  • Page 156: D/A Output (D/A Output Items; Option)

    22 Utility D/A Output (D/A Output Items; option) You can generate numeric data as ±5 V FS DC voltage signals from the rear panel D/A output connector. You can set up to 20 items (channels). Output Items (Item) The measurement functions that you select under Function and Element/Σ appear here. Function (Function) •...
  • Page 157 22 Utility Fixed range mode Manual range mode (DA zoom) Measured current D/A output D/A output 1.0 A 5.0 V 5.0 V 0.8 A 4.0 V 0.6 A 3.0 V Time Time –5.0 V Maximum (Max) and Minimum (Min) Range Values When the range mode is Manual, you can set the maximum (Max) and minimum (Min) values within the following range.
  • Page 158 22 Utility Integrated Values D/A output Approx. 7.0 V At 140% of the rated input 5.0 V At the rated input Integration time t0: The rated time of integrated D/A output in manual integration mode. The timer time in normal or continuous integration mode. Other Items Displayed Output...

  • Page 159: Self-Test (Selftest)

    If the characters that you type appear correctly in the keyboard’s input box, the keyboard is functioning properly. Executing a Test (Test Exec) The selected self-test starts. If an Error Occurs during a Self-Test If an error occurs even after you perform self-tests numerous times, contact your nearest YOKOGAWA dealer. 22-11 IM WT1801-01EN...

  • Page 160: 23 Other Features

    23 Other Features You can set the following items. • Zero-level compensation (CAL) • NULL feature (NULL SET) • Enabling and Disabling the NULL Feature (NULL) • Clearing Remote Mode (LOCAL) • Key lock (KEY LOCK) Zero-Level Compensation (CAL) Zero-level compensation is the process of creating a zero-input condition using the WT1800 internal circuit and setting the level at that point to the zero level.
  • Page 161 23 Other Features Auxiliary Input (Aux) • All: You can enable or disable the NULL feature for the Aux1 and Aux2 signals at the same time. • Aux1, Aux2: You can enable or disable the NULL feature for the Aux1 and Aux2 signals separately. NULL Status (Status) Enable or disable the NULL feature for each input signal •...

  • Page 162: Enabling And Disabling The Null Feature (Null)

    23 Other Features Enabling and Disabling the NULL Feature (NULL) • Enable the NULL feature. The NULL key illuminates. The NULL indicator illuminates as described below depending on how the Target Element setting has been set. • All: The NULL indicator illuminates in the upper right of the screen. •...

  • Page 163: Index

    Index Symbols C1+ Trace ................15-1 Page C2x Position ............... 15-2 Δ Measure ................2-6 C2x Trace ................15-1 ΔMeasure Mode ..............2-8 CAL ..................23-1 ΔMeasure Type ..............2-6 calculation..............4-4, 5-2 η Formula ................2-4 capture control settings ............16-5 Σ...
  • Page 164 Index display format, bar graph ............ 12-1 FTP server ................21-3 display format, numeric data ......... 7-1, 7-4 FU/FI/η .................. 7-5 display format, trend ............11-2 display format, vector ............13-2 Page display format, waveform............ 10-2 GP-IB .................. 22-3 display frame ................ 7-6 graticule ................
  • Page 165 Index linear scale ..............4-3, 5-2 Page linear scale, motor evaluation ..........4-3 p-p compression ..............10-3 linear scaling, auxiliary input..........5-2 PAGE DOWN ............... 7-3 line filter ..............2-19, 4-4, 5-3 PAGE END ................7-3 line filter, auxiliary input ............5-3 PAGE TOP ................
  • Page 166 Index saved items ................ 16-8 sync speed ................4-7 save numeric ..............18-2 system config..............22-5 save setup ................18-2 system overview ..............22-2 save wave................18-2 system settings ..............22-5 saving numeric data ............18-2 scale mode ................. 12-2 Page scale value................
  • Page 167 Index vector zoom ................ 13-2 vertical axis ................. 10-4 vertical position ..............10-9 vertical scale ............... 12-2 vertical scale type ............... 12-2 vertical zoom ..............10-8 volt-ampere hours..............9-1 voltage and current measurement modes ......16-5 voltage auto range .............. 2-10 voltage range ................

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