YOKOGAWA WT332E User Manual
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YOKOGAWA WT332E User Manual

Digital power meter
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User's
Manual
WT310E/WT310EH/WT332E/WT333E
Digital Power Meter
Getting Started Guide
IM WT310E-02EN
4th Edition

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Summary of Contents for YOKOGAWA WT332E

  • Page 1 User’s Manual WT310E/WT310EH/WT332E/WT333E Digital Power Meter Getting Started Guide IM WT310E-02EN 4th Edition...
  • Page 2 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 website. http://tmi.yokogawa.com/ PIM 103-04E...
  • Page 3 Thank you for purchasing the WT310E, WT310EH, WT332E, or WT333E Digital Power Meter. This Instrument is a power measurement instrument that can measure parameters such as voltage, current, and power. This getting started guide primarily explains the handling precautions and basic operations of this instrument.

  • Page 4: Checking The Contents Of The Package

    Unpack the box and check the contents before operating the instrument. If the wrong items have been delivered, if items are missing, or if there is a problem with the appearance of the items, contact your nearest YOKOGAWA dealer. WT310E/WT310EH/WT332E/WT333E Check that the product that you received is what you ordered by referring to the model name and suffix code given on the name plate on the left side panel.
  • Page 5 /DA4 D/A output (4CH); for the WT310E or WT310EH /DA12 D/A output (12CH); for the WT332E or WT333E US Package 1 Make sure that the attached power cord meets the designated standards of the country and area that you are using it in.
  • Page 6 WT310E: One set with one hexagonal socket wrench WT310EH: One set with one hexagonal socket wrench WT332E: Two sets with one hexagonal socket wrench WT333E: Three sets with one hexagonal socket wrench For instructions on how to assemble the 758931, see section 2.6.
  • Page 7 PDFs of the User’s Manuals of This Instrument These manuals are in the Manuals folder. English File Name Manual Title Manual No. User's Manual.pdf WT310E/WT310EH/WT332E/WT333E Digital Power IM WT310E-01EN Meter User's Manual Getting Started Guide.pdf WT310E/WT310EH/WT332E/WT333E Digital Power IM WT310E-02EN Meter Getting Started Guide Communication Interface.pdf...
  • Page 8 Optional Accessories (Sold separately) The following optional accessories are available for purchase separately. Use the accessories specified in this manual. Moreover, use the accessories of this product only with Yokogawa products that specify them as accessories. For information about ordering accessories, contact your nearest YOKOGAWA dealer.

  • Page 9: Safety Precautions

    YOKOGAWA assumes no liability for the customer’s failure to comply with these requirements. This manual is part of the product and contains important information. Store this manual in a safe place close to the instrument so that you can refer to it immediately.
  • Page 10 Do Not Remove the Covers or Disassemble or Alter the Instrument Only qualified YOKOGAWA personnel may remove the covers and disassemble or alter the instrument. The inside of the instrument is dangerous because parts of it have high voltages.
  • Page 11 The amount of time that power remains in the item under measurement varies depending on the item. Accessories Use the accessories specified in this manual. Moreover, use the accessories of this product only with Yokogawa products that specify them as accessories. Do not use faulty accessories. IM WT310E-02EN...
  • Page 12 être extrêmement dangereux. Ne pas retirer le capot, ni démonter ou modifier l'instrument Seul le personnel YOKOGAWA qualifié est habilité à retirer le capot et à démonter ou modifier l'instrument. Certains composants à l'intérieur de l'instrument sont à haute tension et par conséquent, représentent un danger.
  • Page 13 Safety Precautions Catégorie de mesure Cet instrument appartient à la catégorie de mesure II. Ne pas l’utiliser pour réaliser des mesures de catégorie III ou IV. Installer et utiliser l'instrument aux emplacements appropriés • Ne pas installer, ni utiliser l'instrument à l'extérieur ou dans des lieux exposés à la pluie ou à l'eau. •...
  • Page 14 Safety Precautions Accessoires Utiliser les accessoires spécifiés dans ce manuel. En outre, utiliser les accessoires de ce produit uniquement avec des produits Yokogawa pour lesquels ils sont spécifiés comme accessoires. Ne pas utiliser d’accessoires défectueux. ATTENTION Limitations relatives à l’environnement opérationnel Ce produit est classé...

  • Page 15: Regulations And Sales In Each Country Or Region

    Yokogawa Europe B.V. office. Authorized Representative in the EEA Yokogawa Europe B.V. is the authorized representative of Yokogawa Test & Measurement Corporation for this product in the EEA. To contact Yokogawa Europe B.V., see the separate list of worldwide contacts, PIM 113-01Z2. 關於在台灣銷售...

  • Page 16: Symbols And Notation Used In This Manual

    Symbols and Notation Used in This Manual Prefixes k and K Prefixes k and K used before units are distinguished as follows: k: Denotes 1000. Example: 100 kHz (frequency) K: Denotes 1024. Example: 720 KB (file size) Notes The notes and cautions in this manual are categorized using the following symbols. Improper handling or use can lead to injury to the user or damage to the instrument.
  • Page 17 Symbols and Notation Used in This Manual Symbols and Conventions Used in Procedural Explanations The contents of the procedural explanations are indicated using the following symbols. This mark appears on the right side of the page to indicate features and settings that can be operated and configured using the WTViewerFreePlus application software, which comes with the instrument.

  • Page 18: Workflow

    Workflow The figure below is provided to familiarize the first-time user with the workflow of operation. For a description of an item, see the relevant section or chapter. In addition to the sections and chapters that are referenced in the figure below, this manual also contains safety precautions for handling and wiring the instrument.

  • Page 19: Table Of Contents

    Operating this instrument Setting the Measurement Ranges ..................4-1 Configuring the Wiring System Settings (Only on the WT332E/WT333E) ....... 4-4 Displaying the Voltage, Current, and Active Power on the WT310E/WT310EH ....4-5 Displaying Voltages, Currents, and Active Powers on the WT332E/WT333E ....4-6...
  • Page 20 Contents Chapter 6 Troubleshooting, Maintenance, and Inspection Troubleshooting ........................ 6-1 Error Code Descriptions and Corrective Actions .............. 6-2 Recommended Part Replacement ................... 6-3 Calibration and Adjustment ....................6-4 Chapter 7 Specifications Input ..........................7-1 Measurement Items ......................7-4 Accuracy ........................... 7-5 Features ...........................

  • Page 21: Chapter 1 Component Names And Functions

    Chapter 1 Component Names and Functions Front Panel, Rear Panel, and Top Panel WT310E/WT310EH Front Panel Function and unit indicators 7-segment LED → section 1.2 display Keys → section 1.2 → section 1.4 Handle Used to carry this instrument → section 2.1 Power switch →...
  • Page 22 1.1 Front Panel, Rear Panel, and Top Panel Top Panel Inlet holes → section 2.2 (There are also inlet holes on the bottom panel.) Vent holes → section 2.2 IM WT310E-02EN...
  • Page 23 1.1 Front Panel, Rear Panel, and Top Panel WT332E/WT333E Front Panel Function, unit, and element indicators 7-segment LED → section 1.2 display Keys → section 1.2 → section 1.4 Power switch → section 2.4 Handle Used to carry this instrument →...
  • Page 24 1.1 Front Panel, Rear Panel, and Top Panel Top Panel Inlet holes → section 2.2 (There are also inlet holes on the bottom panel.) Vent holes → section 2.2 IM WT310E-02EN...

  • Page 25: Displayed Items

    Displayed Items WT310E/WT310EH Data update indicator (UPDATE) Blinks when measurement data is being updated. Auto range monitor (CHECK RANGE) Lights when an input signal meets the conditions for auto range switching Measurement mode indicator (MODE) Indicates the voltage and current measurement modes MAX HOLD indicator (MAX HOLD) Lights when MAX HOLD is enabled 7-segment LED display...
  • Page 26 1.2 Displayed Items WT332E/WT333E Data update indicator (UPDATE) Blinks when measurement data is being updated. Auto range monitor (CHECK RANGE) Lights when an input signal meets the conditions for auto range switching Measurement mode indicator (MODE) Indicates the voltage and current measurement modes...

  • Page 27: Digital Numbers And Characters

    Digital Numbers and Characters Because this instrument uses a 7-segment LED display, numbers, letters, and mathematical symbols are displayed using special characters in the manner shown below. Some of the characters shown below are not used by this instrument. ^ (exponentiation) Lowercase c –...

  • Page 28: Keys

    Keys Switching the Display FUNCTION Key Choose which function to display. ELEMENT Key (Only on the WT332E/WT333E) Choose which input element to display. The indicator of the selected element lights. WT310E/WT310EH WT332E/WT333E Measurement Range and Mode VOLTAGE Key Displays the voltage range setting menu. The AUTO indicator lights when the range is set to AUTO.
  • Page 29 1.4 Keys Display Hold/MAX Hold SHIFT+CURRENT (MAX HOLD) Key Turns the MAX hold feature on and off. When the MAX hold feature is on, the MAX HOLD indicator lights. HOLD Key Switches from updating the display after each data update interval to stopping the series of display operations and holding the display of the numeric data.
  • Page 30 1.4 Keys Integrated Power (Watt hour) START Key Starts integration STOP Key Stops integration SHIFT+START (INTEG SET) Key Displays a menu for setting the integration mode, timer, and rated integration time SHIFT+STOP Key (RESET) Resets the integrated value and the elapsed integration time. Communication Interface INTERFACE Key Displays the communication interface setting menu and connection information...
  • Page 31 1.4 Keys Other Features SETUP Key Set the measurement synchronization source, input filter, scaling, external current sensor input, averaging, computation, data update interval, etc. SAVE/LOAD Key Save or load setup data. SHIFT+SETUP (UTILITY) Key Displays a menu for displaying system information (model information, suffix code, instrument number, and firmware version), initializing settings, setting the number of displayed digits, performing self-tests, and configuring crest factor, storage, network, and D/A output settings.

  • Page 32: Auto Range, Overrange, And Error Indications During Measurement

    If a computed value cannot be displayed using the specified decimal place or unit, the following indication appears. Auto Range Monitor Indications When an input signal meets the conditions for auto range switching, an indicator lights. WT310E/WT310EH WT332E/WT333E Colors and Meanings of Auto Range Monitor Indicators Color Description Peak overrange...
  • Page 33 1.5 Auto Range, Overrange, and Error Indications During Measurement Measurement Suspension/No Data Indication (Dashes) When the measurement range, function, or element is switched and the displayed contents change or when there is no data to display, the following dashes are displayed temporarily. Error Displayed in cases such as when a measured value is outside of its determined range.

  • Page 34: System Configuration

    System Configuration Load Power Supply Current sensor (optional) Voltage Current (Apply one of them.) (Apply one of them.) Remote control signal WT332E/WT333E (optional) WT310E/WT310EH Integration start Internal memory Integration stop Numeric data storage Hold/ single USB interface/ GP-IB interface RS-232 interface...

  • Page 35: Chapter 2 Making Preparations For Measurements

    Do Not Remove the Case Do not remove the case from the instrument. Some parts of the instrument use high voltages and are extremely dangerous. For internal inspection and adjustment, contact your nearest YOKOGAWA dealer. Unplug If Abnormal Behavior Occurs If you notice smoke or unusual odors coming from the instrument, immediately turn off the power and unplug the power cord.
  • Page 36 When carrying the instrument, use the handle as shown in the following figure, or use both hands to hold the instrument firmly. WT310E/WT310EH WT332E/WT333E WARNING • When you hold or put away the handle, be careful not to get your hand caught between the handle and the case.

  • Page 37: Installing The Instrument

    Installing the Instrument Installation Conditions WARNING • Do not install or use the instrument outdoors or in locations subject to rain or water. • Install the instrument so that you can immediately remove the power cord if an abnormal or dangerous condition occurs.
  • Page 38 2.2 Installing the Instrument Do Not Install the Instrument in the Following Places • Outdoors. • In direct sunlight or near heat sources. • Where the instrument is exposed to water or other liquids. • Where an excessive amount of soot, steam, dust, or corrosive gas is present. •...
  • Page 39 2 or 4.) Rotating base Pull this out approximately 2 mm to 3 mm, and rotate the handle. • WT332E/WT333E Movable legs WARNING • When adjusting the WT310E/WT310EH handle, be careful not to injure your hand with the edges of the handle.
  • Page 40 751533-J2 For JIS single mount Rack mount kit 751534-E2 For EIA dual mount Rack mount kit 751534-J2 For JIS dual mount • For the WT332E/WT333E Item Model Note Rack mount kit 751533-E3 For EIA single mount Rack mount kit 751533-J3...

  • Page 41: Connecting The Power Supply

    Connecting the Power Supply Before Connecting the Power Supply To prevent electric shock and damage to the instrument, follow the warnings below. WARNING • Make sure that the power supply voltage matches the instrument's rated supply voltage and that it does not exceed the maximum voltage range of the power cord to use. •...
  • Page 42 48 Hz to 63 Hz Maximum power consumption WT310E/WT310EH: 50 VA, WT332E/WT333E: 70 VA * This instrument can use a 100 V or a 200 V power supply. The maximum rated voltage differs according to the type of power cord. Check that the voltage supplied to the instrument is less than or equal to the maximum rated voltage of the power cord that you will be using before use.

  • Page 43: Turning The Power Switch On And Off

    For details about initializing the settings, see section 3.3, “Initializing Settings.” • If the instrument still does not work properly, contact your nearest YOKOGAWA dealer for repairs. • If an error code is displayed, see section 6.2, “Error Code Descriptions and Corrective Actions,” and take the appropriate actions.
  • Page 44 (see section 6.2, “Error Code Descriptions and Corrective Actions”). If this message appears frequently, you need to replace the battery soon. Do not try to replace the battery yourself. Contact your nearest YOKOGAWA dealer to have the battery replaced. Power-on Messages Power on All the LEDs light.

  • Page 45: Precautions When Wiring The Circuit Under Measurement

    Precautions When Wiring the Circuit under Measurement To prevent electric shock and damage to the instrument, follow the warnings below. WARNING • Ground the instrument before connecting measurement cables. The power cord to use is a three-prong type power cord. Insert the power cord into a grounded three-prong outlet. •...
  • Page 46 Peak value of 2.8 kV or rms value of 2 kV, whichever is less. Current input Direct input • WT310E and WT332E/WT333E When the crest factor is 3: 0.5 A to 20 A range When the crest factor is 6 or 6A: 0.25 A to 10 A range Peak value of 450 A or rms value of 300 A, whichever is less.
  • Page 47 Peak value of 1.5 kV or rms value of 1.0 kV, whichever is less. Current input Direct input • WT310E and WT332E/WT333E When the crest factor is 3: 0.5 A to 20 A range When the crest factor is 6 or 6A: 0.25 A to 10 A range Peak value of 100 A or rms value of 30 A, whichever is less.
  • Page 48 2.5 Precautions When Wiring the Circuit under Measurement French AVERTISSEMENT • Relier l’instrument à la terre avant de brancher les câbles de mesure. Le cordon d'alimentation à utiliser est un cordon d'alimentation à trois broches. Brancher le cordon d’alimentation sur une prise de courant à trois plots mise à la terre. •...
  • Page 49 Entrée de courant Entrée directe • WT310E et WT332E/WT333E Lorsque le facteur de crête est de 3 : de 0,5 A à 20 A gamme Lorsque le facteur de crête est de 6 : de 0,25 A à 10 A gamme Valeur crête de 450 A ou valeur efficace de 300 A, selon la valeur la plus basse.
  • Page 50 Entrée de courant Entrée directe • WT310E et WT332E/WT333E Lorsque le facteur de crête est de 3 : de 0,5 A à 20 A gamme Lorsque le facteur de crête est de 6 : de 0,25 A à 10 A gamme Valeur crête de 1000 A ou valeur efficace de 30 A, selon la valeur la plus basse.

  • Page 51: Assembling The Adapters For The Voltage Input Terminals

    Assembling the Adapters for the Voltage Input Terminals When connecting a measurement cable to the voltage input terminal of this instrument, use the included 758931 Safety Terminal Adapter or the 758923 Safety Terminal Adapter (sold separately). 758931 Safety Terminal Adapter Cover Internal insulator Plug...
  • Page 52 758921 758917 WT310E/WT310EH Voltage input terminals 758922 758923 758929 WT332E/WT333E Voltage input terminals 758931 Wiring to a Current Input Terminal Use the clamp-on probes (sold separately) as shown below. Current under measurement When you are connecting to the 96030, 96031, 96030 or 758924, remove the terminal sleeves.

  • Page 53: Wiring For Accurately Measuring A Single-Phase Device

    Wiring for Accurately Measuring a Single- phase Device When you are wiring a single-phase device, there are the four patterns of terminal wiring positions shown in the following figures for wiring the voltage input and current input terminals. Depending on the terminal wiring positions, the effects of stray capacitance and the effects of the measured voltage and current amplitudes may become large.

  • Page 54: Guide For Selecting The Method Used To Measure The Power

    Voltage transformer (VT) → section 2.11 Current Measurement Methods When the Voltage Is 600 V or Less When the Current When the Current WT310E/WT332E/WT333E When the Voltage Is 20 A or Less Exceeds 20 A Product Exceeds 600 V name...

  • Page 55: Wiring The Circuit Under Measurement For Direct Input

    Voltage input terminals 758931 WT310E/WT310EH WT332E/WT333E Current Input Terminals The terminals are binding posts, and the screws are M6. Either wind a wire around a screw or pass a crimped terminal through the screw axis, and then tighten firmly with the terminal knob.
  • Page 56 2.9 Wiring the Circuit under Measurement for Direct Input WARNING • When the voltage of the circuit under measurement is being applied to the current input terminals, do not touch the external current sensor input terminal. Doing so is dangerous because the terminals are electrically connected inside the instrument.
  • Page 57 2.9 Wiring the Circuit under Measurement for Direct Input Connecting to a Round Crimped Terminal To connect a cable with a round crimped terminal to a current input terminal, follow the procedure below. Note that once the stopper pressed into the knob is removed, it will easily come off if it is used again.
  • Page 58 2.9 Wiring the Circuit under Measurement for Direct Input Connecting to the WT310E/WT310EH In the wiring examples that follow, the WT310E/WT310EH input elements, voltage input terminals, and current input terminals are simplified as shown in the following figure. Input element Current input Voltage input terminals...
  • Page 59 2.9 Wiring the Circuit under Measurement for Direct Input Wiring Patterns When you are wiring a single-phase device, there are the four patterns of terminal wiring positions shown in the following figures for wiring the voltage input and current input terminals. To select which pattern to use, see section 2.7.
  • Page 60 2.9 Wiring the Circuit under Measurement for Direct Input Example Wiring Procedure This example will explain the procedure that you should use to configure the wiring when using the WT310E to measure the power of a single-phase, two-wire DUT. The procedure is the same when measuring using the WT310EH.
  • Page 61 2.9 Wiring the Circuit under Measurement for Direct Input Strip the insulation of the power cable that you cut, and attach round crimped terminals if necessary. Connect the power cable to the WT310E in the following ways. • Power-source-side cable: Connect to the ± current input terminal. •...
  • Page 62 2.9 Wiring the Circuit under Measurement for Direct Input Attach 758931 Safety Terminal Adapters to the voltage measurement cables. For details on how to assemble and attach the safety terminal adapters, see section 2.5. You can avoid wiring mistakes by connecting a red adapter to the high-voltage cable and a black adapter to the low-voltage cable.
  • Page 63 2.9 Wiring the Circuit under Measurement for Direct Input You can also connect to the circuit under measurement by placing a terminal block near the WT310E and connecting the power cables and voltage measurement cables to the terminal block. Terminal block Index 2-29 IM WT310E-02EN...
  • Page 64 2.9 Wiring the Circuit under Measurement for Direct Input Connecting to the WT332E/WT333E In the wiring examples that follow, the WT332E/WT333E input elements, voltage input terminals, and current input terminals are simplified as shown in the following figure. V: VOLTAGE terminal C: CURRENT terminal ±...
  • Page 65 2.9 Wiring the Circuit under Measurement for Direct Input Wiring Example of a Single-Phase, Three-Wire System (1P3W) The wiring is connected to input elements 1 and 3. LOAD SOURCE ± ± ± ± SOURCE LOAD ± ± ± ± Element 1 Element 3 (V1, A1) (V3, A3)
  • Page 66 2.9 Wiring the Circuit under Measurement for Direct Input Wiring Example with the Three-Voltage, Three-Current Method (3V3A) Applies to the WT333E. The wiring is connected to input elements 1, 2, and 3. ± SOURCE LOAD ± SOURCE LOAD ± ± ±...
  • Page 67 Generally, it is easier to follow the wiring diagram if you wire to the current input terminals first and Index then to the voltage input terminals. In this example as well, we will wire to the WT332E/WT333E current input terminals first and then to the voltage input terminals.
  • Page 68 ± Note Why You Do Not Have to Connect the WT332E/WT333E Current Input Terminals to the S-Phase Cable In a three-phase, three-wire wiring system, there is no neutral line. This means that either the R, S, or T phase is treated as a virtual neutral line when power is measured. In this example, the S-phase cable is treated as the virtual neutral line.
  • Page 69 2.9 Wiring the Circuit under Measurement for Direct Input Wiring to the Voltage Input Terminals Connect the voltage input terminals in parallel with the DUT. Using phase S as the reference, measure the line voltage between phase R and phase S and between phase T and phase S.
  • Page 70 2.9 Wiring the Circuit under Measurement for Direct Input Connect the safety terminal adapters to the WT332E/WT333E voltage input terminals. • Red R-phase adapter: Connect to the VOLTAGE voltage input terminal of element 1. • Red T-phase adapter: Connect to the VOLTAGE voltage input terminal of element 3.
  • Page 71 2.9 Wiring the Circuit under Measurement for Direct Input You can also connect to the circuit under measurement by placing a terminal block near the WT332E/WT333E and connecting the power cables and voltage measurement cables to the terminal block. Terminal block...

  • Page 72: Wiring The Circuit Under Measurement When Using Current Sensors

    If the maximum current of the circuit under measurement exceeds the maximum range of the input elements, you can measure the current of the circuit under measurement by connecting an external current sensor to the external current sensor input terminal. • WT310E and WT332E/WT333E When the maximum current exceeds 20 Arms • WT310EH...
  • Page 73 2.10 Wiring the Circuit under Measurement When Using Current Sensors CAUTION The thick lines on the wiring diagrams are the parts where the current flows. Use wires that are suitable for the current levels. French AVERTISSEMENT Lors du branchement d’un câble de mesure d’un capteur de courant externe sur un connecteur d’entrée de capteur de courant externe, retirer les câbles branchés sur les bornes d’entrée de courant.
  • Page 74 This instrument Voltage input terminals ± LOAD External current sensor input terminal Connecting the 96001 Clamp-on Probe When using the Yokogawa 96001 Clamp-on Probe, use the 758924 Conversion Adapter (optional accessory). 96001 (voltage output type) WT310E/WT310EH 758924 EXT input terminal WT332E/WT333E...
  • Page 75 2.10 Wiring the Circuit under Measurement When Using Current Sensors Connecting to the WT310E/WT310EH In the wiring examples that follow, the WT310E/WT310EH input elements, voltage input terminals, and current input terminals are simplified as shown in the following figure. Voltage input WT310E/WT310EH terminals External current sensor...
  • Page 76 2.10 Wiring the Circuit under Measurement When Using Current Sensors Connecting to the WT332E/WT333E In the wiring examples that follow, the WT332E/WT333E input elements, voltage input terminals, and current input terminals are simplified as shown in the following figure. ±...
  • Page 77 2.10 Wiring the Circuit under Measurement When Using Current Sensors Wiring Example of a Single-Phase, Three-Wire System (1P3W) with Shunt-Type Current Sensors The wiring is connected to input elements 1 and 3. SOURCE LOAD OUT H OUT L OUT H OUT L ±...
  • Page 78 2.10 Wiring the Circuit under Measurement When Using Current Sensors Wiring Example with the Three-Voltage, Three-Current Method (3V3A) and Shunt-Type Current Sensors Model: Applies to the WT333E. The wiring is connected to input elements 1, 2, and 3. SOURCE LOAD OUT H OUT L OUT H...

  • Page 79: Wiring The Circuit Under Measurement When Using A Voltage Or Current Transformer

    CT or a clamp-type sensor that outputs current to the current input terminal. • WT310E and WT332E/WT333E When the maximum current exceeds 20 Arms • WT310EH...
  • Page 80 2.11 Wiring the Circuit under Measurement When Using a Voltage or Current Transformer French AVERTISSEMENT • Lorsque la tension du circuit à mesurer est appliquée aux bornes d’entrée de courant, ne pas toucher les bornes d’entrée de capteur de courant externe, car elles sont connectées électroniquement à...
  • Page 81 To measure the apparent power and power factor more accurately on an unbalanced three-phase circuit, we recommend that you use the three-voltage, three-current method (3V3A). When using the Yokogawa 751552 Clamp-on Probe, use the 758917 Measurement Lead and the 758921 Fork Terminal Adapter Set (optional accessory).
  • Page 82 2.11 Wiring the Circuit under Measurement When Using a Voltage or Current Transformer Connecting to the WT310E/WT310EH In the wiring examples that follow, the WT310E/WT310EH input elements, voltage input terminals, and current input terminals are simplified as shown in the following figure. Input element Current input Voltage input...
  • Page 83 2.11 Wiring the Circuit under Measurement When Using a Voltage or Current Transformer Connecting to the WT332E/WT333E In the wiring examples that follow, the WT332E/WT333E input elements, voltage input terminals, and current input terminals are simplified as shown in the following figure.
  • Page 84 2.11 Wiring the Circuit under Measurement When Using a Voltage or Current Transformer Wiring Example of Single-Phase, Two-Wire Systems (1P2W) with a VT and CT The following wiring example shows how to configure the wiring to connect to input element 1. To configure the wiring for other input elements, substitute the numbers in the figures with the appropriate element numbers.
  • Page 85 2.11 Wiring the Circuit under Measurement When Using a Voltage or Current Transformer Wiring Example of a Three-Phase, Four-Wire System (3P4W) with VTs and CTs Model: Applies to the WT333E. The wiring is connected to input elements 1, 2, and 3. SOURCE LOAD L CT...

  • Page 86: Connecting To A Pc Via Usb (Installing Wtviewerfreeplus)

    PC. In addition, you can use WTViewerFreePlus, which is a software application supplied with this instrument, to save measured data to the PC and change the settings of this instrument, without having to create original communication control programs. PC monitor WT332E/WT333E WT310E/WT310EH Saved data Setting changes This instrument can be connected to a PC using the following communication interfaces.

  • Page 87: Index

    Click Allow or Yes to continue the installation. After the installation finishes, a new WTViewerFreePlus folder is added to the Start menu in Windows. You can open the folder by clicking the Start button, All Programs, YOKOGAWA, and then WTViewerFreePlus.
  • Page 88 2.12 Connecting to a PC via USB (Installing WTViewerFreePlus) For information on how to display measured data and change the settings of this instrument from WTViewerFreePlus, see chapters 5 and 6 in the WTViewerFreePlus User’s Manual, IM 760121-02E. Example of a Window for Configuring This Instrument You can change the settings of this instrument from a PC.

  • Page 89: Chapter 3 Common Operations

    MATH and THD are displayed on the left side of the 7-segment LED display. • Press SHIFT before pressing FUNCTION to change the displayed function in reverse order. Selecting Which Element to Display (Only on the WT332E/ WT333E) Press ELEMENT to select which element to display.
  • Page 90 3.1 Key Operation and Functions Setup and Execution Keys How to Use the Setup Menus That Appear When Setup Keys Are Pressed Press a setup key to display the setup menu that corresponds to that key. Use ▲ or ▼ to select an item. Press SET to confirm the item that you selected or set. If there are more items to set, those items will appear.

  • Page 91: Entering Values

    Entering Values Selecting a Value The digit that is blinking is the one that is currently being set. Use ▲ or ▼ to select a number. Moving the Digit That Is Being Set Press SHIFT+▼ ( ► ) to move the digit that is being set to the right. If you press SHIFT+▼ ( ►...

  • Page 92: Initializing The Settings

    Initializing the Settings This section explains how to reset the settings of this instrument to their factory default values. This feature is useful when you want to cancel all of the settings that you have entered or when you want to redo measurement from scratch.

  • Page 93: Chapter 4 Operating This Instrument

    For information about the other digital numbers and characters that are displayed in the 7-segment LED displays, see section 1.3. An illustration of the WT310E/WT310EH is used in this explanation, but this operation can be performed using the same keys on the WT332E/WT333E. Press The voltage range setup menu appears.
  • Page 94 For information about the other digital numbers and characters that are displayed in the 7-segment LED displays, see section 1.3. An illustration of the WT310E/WT310EH is used in this explanation, but this operation can be performed using the same keys on the WT332E/WT333E. Press The current range setup menu appears.
  • Page 95 There are more ranges to choose from on models with the /EX1 or /EX2 option. For details, see section 2.4 in the User’s Manual, IM WT310E-01EN. WT332E/WT333E Current Ranges When the Crest Factor Is Set to 3 When the Crest Factor Is Set to 6 or 6A...

  • Page 96: Configuring The Wiring System Settings (Only On The Wt332E/Wt333E)

    (Only on the WT332E/WT333E) For details, see section 2.2 in the User’s Manual, IMWT310E-01EN. On the WT332E/WT333E, you can set a wiring system that matches the connected circuit under measurement. The wiring system on the WT310E/WT310EH is a single-phase, two-wire system.

  • Page 97: Displaying The Voltage, Current, And Active Power On The Wt310E/Wt310Eh

    Displaying the Voltage, Current, and Active Power on the WT310E/WT310EH For details, see section 4.1 in the User’s Manual, IMWT310E-01EN. After you select the measurement ranges (the voltage and current ranges), select the measurement items that you want to show in each display. Displaying the Voltage in Display A on the WT310E/WT310EH Function keys Press the...

  • Page 98: Displaying Voltages, Currents, And Active Powers On The Wt332E/Wt333E

    , the element indicators for display A light in the following order. Display A * On the WT332E (the two input element model) element indicator 2 is skipped. For example, in a three-phase, three-wire system, the circuit under measurement will be connected to input elements 1 and 3 on the WT332E/WT333E.

  • Page 99: Chapter 5 External I/0 (Option)

    If you select the /DA4 or /DA12 option, D/A output and remote control features are installed in this instrument. You can use the external I/O connector on the rear panel to control this instrument remotely and produce D/A output. Recorder D/A output WT332E/WT333E Remote control Remote signal signal source WT310E/WT310EH...
  • Page 100 (output) Gray (Black 3) White (Red 3) Orange (Black 2) No Connection Gray (Red 2) White (Black 3) No Connection /DA12 (WT332E/WT333E) Pin No. Core Wire Color Signal Name Pin No. Core Wire Color Signal Name Orange (Red 1) Gray (Black 2)
  • Page 101 5.1 External I/O Connector Pin Arrangement and Pinout Remote Control I/O Circuit Input circuit Output circuit +5 V +5 V 10 kΩ 10 kΩ 100 Ω 0.01 μF 0.01 μF L level: 0 V to 1 V L level: 0 V to 1.5 V (8 mA) H level: 4 V to 5 V H level: 2.8 V to 5 V (–8 mA) Index...

  • Page 102: Controlling This Instrument Remotely

    Controlling This Instrument Remotely Through external control, you can hold values, perform single measurements, and start, stop, and reset integration. Controlling Integration Remotely Apply signals according to the following timing chart. Start Stop Reset Start Stop Approx. 25 ms or more EXT START Approx.

  • Page 103: Producing D/A Output

    Close menu. the setting. Press to set area A (the output function). On the WT332E/WT333E, select the element in the following steps 9 and 10. Press to move to area B. Press to select an element (you cannot select an element for 1 The number of channels varies depending on the specific option that is installed.
  • Page 104 The number of channels varies depending on the specific option that is installed. • /DA4 option on the WT310E/WT310EH: 4 channels • /DA12 option on the WT332E/WT333E: 12 channels Output Format You can select a preconfigured output format or configure your own original format.
  • Page 105 5.3 Producing D/A Output Default Values for Integration: dFLt-i Select this setting to output integrated values. The output settings are as follows: Suffix Code /DA4 /DA12 Product Name WT310E WT332E WT333E WT310EH Output Channel PΣ PΣ WPΣ WPΣ ch10 ch11 ch12 qΣ...
  • Page 106 5.3 Producing D/A Output Rated Integration Time In the D/A output of integrated values, 5.0 V FS represents the integrated value when the rated range value is applied for the rated integration time. The same is true if scaling is enabled or the value for Σ is being measured. The default setting is 1.00.00 (1 h, 0 min, 0 s). •...
  • Page 107 5.3 Producing D/A Output 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 Compare (Comparator Mode) By comparing with the comparator limits, this instrument outputs +5 V, 0 V, or –5 V. To replace the output with a relay contact output, like the WT210/WT230 comparator function, provide your own relay and relay driving circuit.
  • Page 108 5.3 Producing D/A Output Relationship between Output Items and D/A Output Voltage Frequency D/A output Approx. 7.5 V 5.0 V 0.5 V Displayed value 0.1 Hz 10 Hz 100 kHz 1 kHz 1 Hz 100 Hz 10 kHz Integrated Value D/A output Approx.
  • Page 109 1 For information about the power range of wiring unit Σ, see the table of Σ function expressions on the second page of the appendix in the User’s Manual, IM WT310E-01EN (PDF). This table shows the expressions that the WT332E/WT333E uses to internally calculate the measured values. This table also shows how to think about wiring unit measurement ranges. In this example, PΣ in the table corresponds to P1 + P3 in the three-phase, three-wire (3P3W) column.

  • Page 110: Chapter 6 Troubleshooting, Maintenance, And Inspection

    Confirm that the display is not being affected by noise. 2.1, 2.5 Check the measurement cable wiring. 2.8 to 2.11 Check the wiring system. (Applies to the WT332E/WT333E.) 2.8 to 2.11, Confirm that the line filter is off. Check the measurement period settings.

  • Page 111: Error Code Descriptions And Corrective Actions

    Error Code Descriptions and Corrective Actions Information That Is Displayed When the Power Is Turned On (Display: Code.##) Code Description Corrective Action Refer To You turned on the power while holding SET, so all the settings have been initialized. The system structure has changed, so all the settings ―...

  • Page 112: Recommended Part Replacement

    Recommended Part Replacement The life and replacement period for expendable items varies depending on the conditions of use. Refer to the table below as a general guideline. For part replacement and purchase, contact your nearest YOKOGAWA dealer. Part Name Recommended Replacement Interval Current input relay A relay for switching the current input circuit.

  • Page 113: Calibration And Adjustment

    Calibration and Adjustment For calibration and adjustment, contact your nearest YOKOGAWA dealer. IM WT310E-02EN...

  • Page 114: Chapter 7 Specifications

    • Direct input • Crest factor 3: • WT310E/WT332E/WT333E: 0.5 A, 1 A, 2 A, 5 A, 10 A, 20 A • WT310E Only: 5 mA, 10 mA, 20 mA, 50 mA, 100 mA, 200 mA • WT310EH: 1 A, 2 A, 5 A, 10 A, 20 A, 40 A •...
  • Page 115 (1 period, for 20 ms) Current • Direct input • WT310E/WT332E/WT333E Crest factor 3: 0.5 A, 1 A, 2 A, 5 A, 10 A, 20 A Crest factor 6 or 6A: 0.25 A, 0.5 A, 1 A, 2.5 A, 5 A, 10 A Peak value of 450 A or RMS value of 300 A, whichever is less •...
  • Page 116 • 15 V, 30 V, 60 V, 150 V, 300 V, 600 V ranges, 0.5 A, 1 A, 2 A, 5 A, 10 A, 20 A ranges of WT310E/ WT332E/WT333E, 1 A, 2 A, 5 A, 10 A, 20 A, 40A ranges of WT310EH and, external current sensor...

  • Page 117: Measurement Items

    PLL synchronization source A Hz frequency of the current set to be the PLL synchronization source Uthd THD V % total harmonic distortion of voltage Ithd THD A % total harmonic distortion of current Element Select the input element or Σ on the WT332E/WT333E. Displays the display item of the selected element. IM WT310E-02EN...

  • Page 118: Accuracy

    The effective input range is within ±300% of range (within ±600% for crest factor 6 or 6A) Voltage input: 1.5 × √(15/range) % of range Direct current input range: WT310E (5mA/10mA/20mA/50mA/100mA/200mA range): 3 ×√(0.005/range) % of range WT310E (0.5A/1A/2A/5A/10A/20A range) and WT332E/WT333E direct current input: 3 ×√(0.5/range) % of range WT310EH direct current input: 3 ×√(1/range) % of range External current sensor input range: /EX1 Option: 3 ×√(2.5/range) % of range /EX2 Option: 3 ×√(0.05/range) % of range...
  • Page 119 Add 0.00006 × I % of reading + 0.001 × I mA to the DC current accuracies. I is the current reading (A). WT332E/WT333E: Add 0.00013 × I % of reading to the AC current accuracies. Add 0.00013 × I % of reading + 0.002 ×...
  • Page 120 Accuracy (at 12 months) (The accuracy shown below is the sum of reading and range errors.) * f in the read error equation is the input signal frequency in kHz. WT310E/WT332E/WT333E WT310EH (Direct current input) WT310EH (Current EXT sensor input) ±(0.1% of reading + 0.2% of range)
  • Page 121 7.3 Accuracy Item Specifications Power factor influence When power factor (λ) = 0 (S: apparent power) • ±0.1% of S for 45 Hz ≤ f ≤ 66 Hz. • ±{(0.1 + 0.15 × f)% of S} for up to 100 kHz as reference data. f is frequency of input signal in kHz. When 0 < λ < 1 (φ: phase angle of the voltage and current) (power reading) × [(power reading error %) + (power range error %) × (power range/indicated apparent power value) + {tanφ × (influence when λ = 0)%}] When the line filter is turned...

  • Page 122: Features

    Upk , Ipk value of the input signal exceeds 600% of the currently set measurement range. On the WT332E/WT333E, when all of the input elements meet the above conditions, the range is decreased the next time the measured value is updated.
  • Page 123 Specifications Measured item Voltage and current frequencies applied to the selected input element can be measured. WT332E (two element model) Select voltage (U1)/current (I1) of input element 1 or voltage (U3)/current (I3) of input element 3. WT333E (three element model) Select voltage (U1)/current (I1) of input element 1, voltage (U2)/current (I2) of input element 2 or voltage (U3)/current (I3) of input element 3.
  • Page 124 Select the attenuation constant for exponential averaging; select the sample number from 8, 16, 32,and 64 for moving average. Efficiency Computation of efficiency is possible on the WT332E/WT333E. Crest factor Computes the crest factor (peak value/RMS value) of voltage and current.
  • Page 125 * The upper limit of harmonic order can be decreased. Accuracy (The accuracy shown below is the sum of reading and range errors.) When Line Filter is OFF <WT310E/WT332E/WT333E> Frequency Voltage Current Power 10 Hz ≤ f < 45 Hz...
  • Page 126 100 hours to 9999 hours 59 100.00 to 1 minute minutes 59 seconds 9999.59 10000 hours 10000 1 hour Efficiency (WT332E/WT333E 0.000 to 99.999 to 0.00 to 99.99 to only) 100.00 to 999.99% 100.0 to 999.9% Crest factor 99999 9999...

  • Page 127: External Current Sensor Input (/Ex1 And /Ex2 Options)

    Saves/Loads four patterns of setup information. Number of blocks which can be stored Model normal measurement normal +harmonic measurement WT310E/WT310EH 9000 WT332E 4000 WT333E 3000 * Harmonic Measurement (/G5 Option) Harmonic measurement function is turned ON. External Current Sensor Input...

  • Page 128: Remote Control Input/Output Signal (/Da4, /Da12 Options)

    Remote Control Input/Output Signal (/DA4, /DA12 Options) Item Specifications Remote control input signal EXT HOLD, EXT TRIG, EXT START, EXT STOP, EXT RESET Remote control output signal INTEG BUSY I/O level I/O logic format Negative logic, falling edge GP-IB Interface (Standard on -C1) Item Specifications Usable devices...

  • Page 129: Ethernet Interface(/C7 Option)

    7.11 Ethernet Interface(/C7 Option) Item Specifications Ports Connector type RJ-45 Electrical and mechanical Complies with IEEE802.3 specifications Transmission system Ethernet (100BASE-TX/10BASE-T) Transfer rate 100 Mbps max. Communication protocol TCP/IP Supported services DHCP, remote control (VXI-11, Modbus/TCP) 7.12 Safety Terminal Adapter Item Specifications Maximum allowable current...

  • Page 130: General Specifications

    External dimensions WT310E, WT310EH: Approx. 213 (W) × 88 (H) × 379 (D) mm (excluding protrusions) WT332E/WT333E: Approx. 213 (W) × 132 (H) × 379 (D) mm Weight WT310E, WT310EH: Approx. 3 kg WT332E/WT333E: Approx. 5 kg Battery backup Setup parameters are backed up with a lithium battery.
  • Page 131 EN 50581 Monitoring and control instruments including industrial monitoring and control instruments Applies to products with CE marks. For information on other products, contact your nearest YOKOGAWA dealer. The overvoltage category (installation category) is a value used to define the transient overvoltage condition and includes the rated impulse withstand voltage.

  • Page 132: External Dimensions

    7.14 External Dimensions Unit: mm Rear view 73 23 ±1 JIS rack mount dimensions ±1 Mounting surface ±1 Index ±1 Mounting surface 482.6 ±1 EIA rack mount dimensions ±1 Mounting surface 482.6 ±1 ±1 Mounting surface Unless otherwise specified, tolerances are ±3% (however, tolerances are ±0.3 mm when below 10 mm).
  • Page 133 7.14 External Dimensions Unit: mm Rear view 28.5 JIS rack mount dimensions ±1 ±1 Mounting surface ±1 ±1 Mounting surface EIA rack mount dimensions 482.6 ±1 ±1 Mounting surface 482.6 ±1 ±1 Mounting surface Unless otherwise specified, tolerances are ±3% (however, tolerances are ±0.3 mm when below 10 mm).

  • Page 134: Appendix

    Only e reduces measurement accuracy. For example, the input resistance of the current measurement circuit of the WT332E/WT333E is approximately 6 mΩ. If the load resistance is 600 Ω, the effect on the measurement accuracy is approximately 0.001% (6 mΩ/600 Ω). For the input resistances of the WT310E and WT310EH, see chapter 7. SOURCE LOAD ±...
  • Page 135 Appendix 1 How to Make Accurate Measurements Effects of Stray Capacitance The effects of stray capacitance on measurement accuracy can be minimized by connecting the current input terminal of this instrument to the side of the power supply (SOURCE) that is closest to its earth potential.
  • Page 136 Appendix 1 How to Make Accurate Measurements Because this instrument measures high frequencies, the effects of i s cannot be ignored. If you connect the current input terminal of this instrument to the side of the power supply (SOURCE) that is close to its earth potential, the current measurement circuit of this instrument positive and negative terminals are close to the earth potential, so V s becomes approximately zero and very little s flows.

This manual is also suitable for:

Wt310ehWt310eWt333eWt300e

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