YOKOGAWA WT310, WT330, WT310HC User Manual

User’s Manual

WT310/WT310HC/WT330 Digital Power Meter Getting Started Guide

IM WT310-02EN

1st Edition

Product Registration

Thank you for purchasing YOKOGAWA products.

YOKOGAWA provides registered users with a variety of information and services. Please allow us to serve you best by completing the product registration form accessible from our homepage.

http://tmi.yokogawa.com/

PIM 103-03E

Thank you for purchasing the WT310, WT310HC, or WT330 Digital Power Meter (hereinafter, “WT310/ WT310HC/WT330” will refer to all of these products). The WT310/WT310HC/WT330 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 the WT310/WT310HC/WT330. To ensure correct use, please read this manual thoroughly before beginning operation. Keep this manual in a safe place for quick reference in the event that a question arises. This manual is one of three WT310/WT310HC/WT330 manuals. Please read all manuals.

Manual Title Manual No. Description

WT310/WT310HC/WT330 Digital Power Meter User’s Manual

WT310/WT310HC/WT330 Digital Power Meter Getting Started Guide

WT310/WT310HC/WT330 Digital Power Meter Communication Interface User’s Manual

IM WT310-01EN The manual explains all the WT310/WT310HC/WT330

features, except for the communication interface features, and how to use them.

IM WT310-02EN This guide. Provided as a printed manual. The manual

explains the handling precautions and basic operations of the WT310/WT310HC/WT330 and provides an overview of its features.

IM WT310-17EN This manual explains the WT310/WT310HC/WT330

communication interface features and how to use them.

PDF files of all the manuals above are included in the accompanying CD.

Notes

• The contents of this manual are subject to change without prior notice as a result of continuing improvements to the instrument’s performance and functionality. The figures given in this manual may differ from those that actually appear on your screen.

•

Every effort has been made in the preparation of this manual t

contents. However, should you have any questions or find any errors, please contact your nearest YOKOGAWA dealer.

• Copying or reproducing all or any part of the contents of this manual without the permission of YOKOGA

• The TCP/IP

WA is strictly prohibited.

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.

o ensure the accuracy of its

Trademarks

• Microsoft, Internet Explorer, MS-DOS, Windows, Windows NT, Windows XP, Windows Vista, and Windows 7 are either registered trademarks or trademarks of Microsoft Corporation in the United States and/or other countries.

•

Adobe and Acrobat are either registered trademarks or tradem

• In this manual, the TM and

® symbols do not accompany their respective registered trademark or

trademark names.

• Other company and product names are registered trademarks or trademarks of their respective holders.

Revisions

• January 2013 1st Edition

IM WT310-02EN

arks of Adobe Systems Incorporated.

IM WT310-02EN

Checking the Contents of the Package

WT310/WT310HC WT330 (Model: WT332/WT333)

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.

WT310/WT310HC/WT330

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. The WT330 includes the WT332 and WT333.

Model Suffix Code Description

WT310 WT310 Digital Power Meter

One input element model

WT310HC WT310 Digital Power Meter

One input element/large current model

WT332 WT330 Digital Power Meter

Two input element model

WT333 WT330 Digital Power Meter

Power cord

Communication interface -C1 GP-IB interface (The instrument is equipped

with one of these.) Options /C7 Ethernet Communication

-D UL/CSA Standard power cord (Part No.: A1006WD)

-F VDE Standard power cord (Part No.: A1009WD)

-Q BS Standard power cord (Part No.: A1054WD)

-R AS Standard power cord (Part No.: A1024WD)

-H GB Standard power cord (Part No.: A1064WD)

-N NBR Standard power cord (Part No.: A1088WD)

-C2 RS-232 interface

/EX1 /EX2 /G5 Harmonic measurement /DA4 DA output (4CH); for the WT310 or WT310HC /DA12 DA output (12CH); for the WT332 or WT333

1 Make sure that the attached power cord meets the designated standards of the country and area

that you are using it in.

2 A single instrument cannot have both the /EX1 and /EX2 optio

Three input element model

Maximum rated voltage: 125 V

Maximum rated voltage: 250 V

2.5 V/5 V/10 V external input

50 mV/100 mV/200 mV/500 mV/1 V/2 V external input

ns.

No. (Instrument number)

When contacting the dealer from which you purchased the instrument, please give them the instrument number.

Standard Accessories

D/A cable

B9879SX

Current input protection cover

B8212BX

Current input protection cover

B8212FX

Rubber feet A9088ZM

One set of manuals

Safety terminal adapter set

758931

UL/CSA Standard A1006WD

VDE Standard A1009WD

BS Standard A1054WD

AS Standard A1024WD

Power cord (one cord that matches the suffix code is included)

GB Standard A1064WD

NBR Standard A1088WD

The instrument is shipped with the following accessories. Make sure that all accessories are present and undamaged.

Checking the Contents of the Package

1 Make sure that the attached power cord meets the designated standards of the country and area

that you are using it in. 2 Same number of sets as the number of installed input elements WT310: One set with one hexagonal socket wrench WT310HC: One set with one hexagonal socket wrench WT332: Two sets with one hexagonal socket wrench WT333: Three sets with one hexagonal socket wrench 3

Included with models that have D/A output and remote control (/DA4 or /DA12) 4 For the WT310/WT310HC 5 For the WT332/WT333 6 For information on the types of printed manuals and manuals on the CD that are provided, see

page i.

IM WT310-02EN

iii

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Checking the Contents of the Package

CD-R

The CD-R contains the data listed below. To view the PDF user’s manuals, you need Adobe Reader 5.0 or later.

PDFs of the WT310/WT310HC/WT330 User’s Manuals

These manuals are in the Manuals folder.

English

• WT310/WT310HC/WT330 Digital Power Meter User’s Manual IM WT310-01EN

• WT310/WT310HC/WT330 Digital Power Meter Getting Started Guide IM WT310-02EN

• WT310/WT310HC/WT330 Digital Power Meter Communication Interface User’s Manual IM WT310-17EN

Japanese

• WT310/WT310HC/WT330 Digital Power Meter User’s Manual IM WT310-01JA

• WT310/WT310HC/WT330 Digital Power Meter Getting Started Guide IM WT310-02JA

• WT310/WT310HC/WT330 Digital Power Meter Communication Interface User’s Manual IM WT310-17JA

Installer for the WTViewerFreePlus Application Software (For the WT310/WT310HC/WT330)

• WTViewerFreePlus_Installer.exe

• WTViewerFreePlus (folder)

• YKMUSB (folder)

PDF of the Manual for the WTViewerFreePlus Application Software

These manuals are in the Manuals folder.

English

• Application Software WTViewerFreePlus for WT310/WT310HC/WT330 User’s Manual IM 760121-02E

Japanese

• Application Software WTViewerFreePlus for WT310/WT310HC/WT330 User’s Manual IM 760121-02

WARNING

Never play this CD-R on an audio CD player. Doing so may cause loss of hearing or speaker damage due to the large sounds that may be produced.

Measurement lead 758917

Alligator clip adapter set 758922

Alligator clip adapter set 758929

Fork terminal adapter set 758921

Safety terminal adapter set 758923

External sensor cable B9284LK

Safety terminal adapter set 758931

Conversion adapter 758924

Checking the Contents of the Package

Optional Accessories (Sold separately)

The following optional accessories are available for purchase separately. For information about ordering accessories, contact your nearest YOKOGAWA dealer.

Item Model/ Min. Q’ty Note

Part No.

External sensor cable B9284LK 1 For connecting to the WT310/WT310HC/WT330’s

external current sensor input connector. Length: 0.5 m.

Measurement lead 758917 1 Two leads in one set. Used with the 758922 or

758929 adapter (sold separately). Length: 0.75 m. Rated voltage: 1000 V.*

Safety terminal adapter set 758923 1 Two pieces in one set. Rated voltage 600 V.*

758931 1 Two pieces in one set. Rated voltage 1000 V.*

Alligator clip adapter set 758922 1 Two pieces in one set. For use with measurement

lead 758917. Rated voltage 300 V.*

758929 1 Two pieces in one set. For use with measurement

lead 758917. Rated voltage 1000 V.*

Fork terminal adapter set 758921 1 Two pieces in one set. For use with measurement

lead 758917. Rated voltage 1000 V.* Rated current: 25 A.

Conversion adapter 758924 1 BNC-4 mm socket adapter. Rated voltage: 500 V.*

* The actual voltage that can be used is the lowest voltage of the WT310/WT310HC/WT330 and

cable specifications.

IM WT310-02EN

Safety Precautions

This instrument is an IEC safety class I instrument (provided with a terminal for protective earth grounding). The general safety precautions described herein must be observed during all phases of operation. If the instrument is used in a manner not specified in this manual, the protection provided by the instrument may be impaired. YOKOGAWA assumes no liability for the customer’s failure to comply with these requirements.

The WT310/WT310HC/WT330 is a power measurement instrument that can measure parameters such as voltage, current, and power. Do not use this instrument for anything other than its intended purpose.

The following symbols are used on this instrument.

Warning: handle with care. Refer to the user’s manual or service manual. This symbol appears

on dangerous locations on the instrument which require special instructions for proper handling

or use. The same symbol appears in the corresponding place in the manual to identify those

instructions.

Electric shock, danger

Ground (earth) or functional ground terminal (do not use this terminal as a protective ground

terminal.)

Alternating current

Both direct and alternating current

ON (power)

OFF (power)

Power-on state

Power-off state

Safety Precautions

Failure to comply with the precautions below could lead to injury or death.

WARNING

Use the Instrument Only for Its Intended Purpose

The WT310/WT310HC/WT330 is a power measurement instrument that can measure parameters such as voltage, current, and power. Do not use this instrument for anything other than as a power measurement instrument.

Check the Physical Appearance

Do not use the instrument if there is a problem with its physical appearance.

Use the Correct Power Supply

Make sure that the power supply voltage matches the instrument’s rated supply voltage and that it does not exceed the maximum voltage range specified for the power cord.

Use the Correct Power Cord and Plug

To prevent the possibility of electric shock or fire, be sure to use the power cord supplied by YOKOGAWA. The main power plug must be plugged into an outlet with a protective earth terminal. Do not invalidate this protection by using an extension cord without protective earth grounding. Additionally, do not use the power cord supplied with this instrument with another instrument.

Connect the Protective Grounding Terminal

Make sure to connect the protective earth to prevent electric shock before turning on the power. The power cord that comes with the instrument is a three-prong type power cord. Connect the power cord to a properly grounded three-prong outlet.

Do Not Impair the Protective Grounding

Never cut off the internal or external protective earth wire or disconnect the wiring of the protective earth terminal. Doing so may result in electric shock or damage to the instrument.

Do Not Operate with Defective Protective Grounding or Fuses

Do not operate the instrument if the protective earth or fuse might be defective. Check the grounding and the fuse before operating the instrument.

Do Not Operate in an Explosive Atmosphere

Do not operate the instrument in the presence of flammable gasses or vapors. Doing so is extremely dangerous.

Do Not Remove Covers

Only qualified YOKOGAWA personnel should remove the instrument’s covers. The inside of the instrument is dangerous because parts of it have high voltages.

Ground the Instrument before Making External Connections

Securely connect the protective grounding before connecting to the item under measurement or to an external control unit. Before touching a circuit, turn off its power and check that it has no voltage.

IM WT310-02EN

Measurement Category

This instrument is a measurement category II product. Do not use it for measurement category III or IV measurements.

Install or Use the Instrument in Appropriate Locations

•

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 dangerous condition occurs.

power cord if an abnormal or

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Safety Precautions

Connect Cables Correctly

Power meters can measure large voltages and currents directly. If you use a voltage transformer or a current transformer together with this power meter, you can measure even larger voltages or currents. When you are measuring a large voltage or current, the power capacity of the item under measurement becomes large. If you do not connect the cables correctly, an overvoltage or overcurrent may be generated in the circuit under measurement. This may lead to not only damage to the power meter and the item under measurement, but electric shock and fire as well. Be careful when you connect the cables, and be sure to check the following points.

Before you begin measuring (before you turn the item under measurement on), check that:

•

Cables have been connected to the power meter’s input terminals correctly.

Check that there are no voltage measurement cables that hav

current input terminals.

Check that there are no current measurement cables that have been connected to the

voltage input terminals.

If you are measuring multiphase power, check that there are no mistakes in the phase

wiring.

• Cables have been connected to the power supply and the item under measurement correctly.

Check that there are no short circuits between terminals or between connected cables.

•

The cables are connected firmly to the current input terminals.

• There are no problems with the current input terminals and the crimping terminals, such as the presence of foreign substances.

e been connected to the

During measurement (never touch the terminals and the connected cables when the item under measurement is on), check that:

There no problems with the input terminals and the crimping terminals, such as the

• presence of foreign substances.

• The input terminals are not abnormally hot.

• The cables are connected firmly to the input terminals.

The terminal connections may become loose over time. If this happens, heat may be

generated due to changes in contact resistance. If you are going to take measurements using the same setup for a long time, periodically check that the cables are firmly connected to the terminals. (Be sure to turn both the power meter and the item under measurement off before you check the connections.)

After measuring (immediately after you turn the item under measurement of After you measure a large voltage or current, power may rema

under measurement even after you turn it off. This remaining power may lead to electric shock, so do not touch the input terminals immediately after you turn the item under measurement off. varies depending on the item.

The amount of time that power remains in the item under measurement

in for some time in the item

See below for operating environment limitations.

f):

CAUTION

This is a class A instrument designed for an industrial environment. Operation of this product in a residential area may cause radio interference in which case the user will be required to correct the interference.

Waste Electrical and Electronic Equipment

Waste Electrical and Electronic Equipment (WEEE), DIRECTIVE 2002/96/EC

(This directive is valid only in the EU.)

This product complies with the WEEE Directive (2002/96/EC) marking requirement. This

marking indicates that you must not discard this electrical/electronic product in domestic

household waste.

Product Category

With reference to the equipment

as a “Monitoring and control instruments” product.

Do not dispose in domestic household waste. When disposing products in the EU, contact your

local Yokogawa Europe B. V. office.

types in the WEEE directive Annex I, this product is classified

New EU Battery Directive

New EU Battery Directive, DIRECTIVE 2006/66/EC

(This directive is valid only in the EU.)

Batteries are included in this product. This marking indicates they shall be sorted out and

collected as ordained in ANNEX II in DIRECTIVE 2006/66/EC.

Battery type: Lithium battery

You ca

nnot replace batteries by yourself. When you need to replace batteries, contact your

local Yokogawa Europe B.V.office.

IM WT310-02EN

Conventions Used in This Manual

Units

k: Denotes 1000. Example: 100 kS/s (sample rate) 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. This symbol appears on the instrument to indicate that the user must refer to the user’s manual for special instructions. The same symbol appears in the corresponding place in the user’s manual to identify those instructions. In the user’s manual, the symbol is used in conjunction with the word “WARNING” or “CAUTION.”

WARNING

CAUTION

Calls attention to information that is important for the proper operation of the

Note

Calls attention to actions or conditions that could cause serious or fatal injury to

the user, and precautions that can be taken to prevent such occurrences.

Calls attention to actions or conditions that could cause light injury to the user

or cause damage to the instrument or user’s data, and precautions that can be taken to prevent such occurrences.

software.

Characters That Appear on the 7-Segment LED

Because this instrument uses a 7-segment LED display, numbers, letters, and mathematical symbols are displayed using special characters. For details, see section 1.3, “Digital Numbers and Characters.”

(Display C)

Configure the storage feature. (Display B)

Confirm the setting.

Close menu.

Conventions 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.

Procedure

Operations are explained using flowcharts. See the example below for an

explanation of how various operations are indicated. All procedures are written

under the assumption that you are starting operation at the beginning of the

procedure, so you may not need to carry out all the steps in a procedure when

you are changing the settings.

Example: Operations for turning the storage feature on and off

The above flow chart indicates the following operations. You can configure items that are blinking.

Press the SHIFT key so that it illuminates, and then press SETUP (UTILITY).

A menu appears in display B.

Use ▲ or ▼ to select StorE.

Pressing either key cycles through 9 menu items.

Press SET to confirm the selection of StorE.

The StorE function menu that you selected in step 2 appears in display C.

Use ▲ or ▼ to select oFF or on.

Pressing either key cycles through 3 menu items.

Press SET to confirm the selection of oFF.

The selected or set item is confirmed when you press SET. A menu appears in display B.

Press HOLD (ESC) to return the menu display to the measurement data display.

• When you are making a number positive (no sign) or negative (–) or setting a number, when the digit in the display that the input will be added to is blank, an underscore flashes at the position of the digit.

• While you are performing menu operations, to leave the menu display, press HOLD (ESC). All setting changes that you have confirmed by pressing the SET

Explanation

This section describes the setup items and the limitations regarding the

key will be reflected in the settings.

procedures. It may not give a detailed explanation of the feature. For a detailed

IM WT310-02EN

explanation of the feature, see chapter 1 in the User’s Manual, IM WT310-01EN.

Workflow

Getting Started Guide Section 2.2 Sections 2.3 and 2.4 Section 2.8 Sections 2.9 to 2.11

Installation and Circuit Wiring

Install the WT310/WT310HC/WT330. Connect the power supply, and turn the power on. Select the measurement method. Wire the circuit under measurement.

Getting Started Guide Sections 3.1 and 3.2 Section 3.3

Common Operations

Perform key operations. Initialize settings.

User’s Manual Chapter 2

Set the Measurement Conditions

Measurement conditions

User’s Manual Section 4.1 Section 4.2 Section 4.3 Section 4.4 Section 4.5 Chapter 5 Chapter 6

Display Measured/Computed Results

Voltage, current, and active power Apparent power, reactive power, and power factor Phase angle and frequency Peak value Crest factor, etc. Integrated power (watt hour) Harmonic measurement

User’s Manual Chapter 7 Section 8.4 and chapter 5 of the Getting Started Guide Communication Interface User’s Manual

Acquire Data

Store data to internal memory. Transmit data using D/A output (option).

Transmit data through the USB, GP-IB, RS-232, or Ethernet interface.

Read the precautions in sections 2.5 and 2.7 thoroughly before connecting the wires. Also, if necessary, assemble the input terminal adapter that connects to the voltage input terminal (see section 2.6) before connecting the wires.

The figure below is provided to familiarize the first-time user with the workflow of WT310/WT310HC/ WT330 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. Be sure to observe the precautions.

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App

Checking the Contents of the Package.............................................................................................ii

Safety Precautions ...........................................................................................................................vi

Waste Electrical and Electronic Equipment ..................................................................................... ix

New EU Battery Directive ................................................................................................................ix

Conventions Used in This Manual ....................................................................................................x

Workflow ......................................................................................................................................... xii

Chapter 1 Component Names and Functions

1.1 Front Panel, Rear Panel, and Top Panel .......................................................................... 1-1

1.2 Displayed Items ................................................................................................................ 1-5

1.3 Digital Numbers and Characters ...................................................................................... 1-7

1.4 Keys

Auto Range, Overrange, and Error Indications During Measurement ............................ 1-12

1.5

1.6 System Configuration .....................................................................................................

Chapter 2 Making Preparations for Measurements

2.1 Handling Precautions ....................................................................................................... 2-1

2.2 Installing the Instrument ................................................................................................... 2-3

2.3 Connecting the Power Supply .......................................................................................... 2-6

2.4 Turning the Power Switch On and Off .............................................................................. 2-7

2.5 Precautions When Wiring the Circuit under Measurement .............................................. 2-9

2.6 Assembling the Adapters for the Voltage Input Terminals .............................................. 2-12

2.7 Wiring for Accurately Measuring a Single-phase Device ................................................ 2-14

2.8 Guide for Selecting the Method Used to Measure the Pow

2.9 Wiring the Circuit under Measurement for Direct Input .................................................. 2-16

2.10 Wiring the Circuit under Measurement When Using Current Sensors ........................... 2-31

2.11 Wiring the Circuit under Measurement When Using a Voltage or Current Transformer . 2-38

2.12 Connecting to a PC via USB (Installing WTViewerFreePlus) ......................................... 2-44

Chapter 3 Common Operations

3.1 Key Operation and Functions ........................................................................................... 3-1

3.2 Entering Values ................................................................................................................ 3-3

3.3 Initializing the Settings ...................................................................................................... 3-4

................................................................................................................................. 1-8

1-14

er ........................................ 2-15

Chapter 4 Operating the WT310/WT310HC/WT330

4.1 Setting the Measurement Ranges .................................................................................... 4-1

4.2 Configuring the Wiring System Settings (Only on the WT330) ........................................ 4-4

4.3 Displaying the Voltage, Current, and Active Power on the WT310/WT310HC

4.4 Displaying Voltages, Currents, and Active Powers on the WT330 ...................................

Chapter 5 External I/0 (Option)

5.1 External I/O Connector Pin Arrangement and Pinout ....................................................... 5-1

5.2 Controlling the WT310/WT310HC/WT330 Remotely ....................................................... 5-3

5.3 Producing D/A Output ....................................................................................................... 5-4

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................. 4-5

4-6

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Contents

Chapter 6 Troubleshooting, Maintenance, and Inspection

6.1 Troubleshooting ................................................................................................................ 6-1

6.2 Error Code Descriptions and Corrective Actions .............................................................. 6-2

6.3 Recommended Part Replacement ................................................................................... 6-3

6.4 Calibration and

Adjustment .............................................................................................. 6-4

Chapter 7 Specifications

7.1 Input ................................................................................................................................. 7-1

7.2 Measurement Items .......................................................................................................... 7-4

7.3 Accuracy ........................................................................................................................... 7-5

7.4

Functions .......................................................................................................................... 7-9

7.5

External Current Sensor Input (/EX1 and /EX2 options) ................................................ 7-14

7.6 D/A Output (/DA4, /DA12 Options)

Remote Control Input/Output Signal (/DA4, /DA12 Options) .......................................... 7-14

7.7

7.8 GP-IB Interface (Standard on -C1) ................................................................................. 7-15

7.9 Serial (RS-232) Interface (Standard on -C2) ..................................................................

7.10 USB PC Interface ........................................................................................................... 7-15

7.1

1 Ethernet Interface(/C7 Option) ....................................................................................... 7-15

7.12 Safety

7.13 General Specifications ................................................................................................... 7-17

7.14 External Dimensions ...................................................................................................... 7-19

Terminal Adapter .................................................................................................

................................................................................. 7-14

7-15

7-16

Appendix

Appendix 1 How to Make Accurate Measurements ..............................................................App-1

Power switch

→ section 2.4

Handle

Used to carry the

WT310/WT310HC/WT330

→ section 2.1

7-segment LED display

→ section 1.2

Function and unit indicators

→ section 1.2

Keys

→ section 1.4

Power inlet

Power connection → section 2.3

GP-IB or RS-232 connector

Used to communicate with the WT310/WT310HC/WT330 through the GP-IB or RS-232 interface → Communication Interface User’s Manual

External I/O connector

For connecting D/A output and remote control cables → chapter 5

For connecting voltage measurement cables → sections 2.8 to 2.11

Voltage input terminals

Current input terminal

For connecting current measurement cables → sections 2.8, 2.9, and 2.11

External current sensor input connector

For connecting cables from an external current sensor → section 2.10

Ethernet port

Used to connect the WT310/WT310HC/WT330 to a network → Communication Interface User’s Manual

USB port for PCs

Used to connect the WT310/WT310HC/WT330 to a PC that has a USB port → Communication Interface User’s Manual

Chapter 1 Component Names and Functions

1.1 Front Panel, Rear Panel, and Top Panel

WT310/WT310HC

Front Panel

Component Names and Functions

Rear Panel

IM WT310-02EN

1-1

1-2

IM WT310-02EN

Vent holes → section 2.2

Inlet holes → section 2.2

(There are also inlet holes on the bottom panel.)

1.1 Front Panel, Rear Panel, and Top Panel

Top Panel

Function, unit, and element indicators

→ section 1.2

Keys

→ section 1.4

Power switch

→ section 2.4

Handle

Used to carry the WT310/WT310HC/WT330 → section 2.1

7-segment LED display

→ section 1.2

Power inlet

Power connection → section 2.3

GP-IB or RS-232 connector

Used to communicate with the WT310/WT310HC/WT330 through the GP-IB or RS-232 interface → Communication Interface User’s Manual

External I/O connector

For connecting D/A output and remote control cables → chapter 5

For connecting voltage measurement cables → sections 2.8 to 2.11

Voltage input terminals

Current input terminal

For connecting current measurement cables → sections 2.8, 2.9, and 2.11

External current sensor input connector

For connecting cables from an external current sensor → section 2.10

Ethernet port

Used to connect the WT310/WT310HC/WT330 to a network → Communication Interface User’s Manual

USB port for PCs

Used to connect the WT310/WT310HC/WT330 to a PC that has a USB port → Communication Interface User’s Manual

WT330

Front Panel

1.1 Front Panel, Rear Panel, and Top Panel

Component Names and Functions

Rear Panel

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1-3

1-4

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Vent holes → section 2.2

Inlet holes → section 2.2

(There are also inlet holes on the bottom panel.)

1.1 Front Panel, Rear Panel, and Top Panel

Top Panel

1.2 Displayed Items

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

Data update indicator (UPDATE)

Blinks when measurement data is being updated.

MAX HOLD indicator (MAX HOLD)

Lights when MAX HOLD is enabled

Scaling indicator (SCALING)

Lights when scaling is enabled

Averaging indicator (AVG)

Lights when averaging is enabled

Line filter indicator (FILTER-LINE)

Lights when the line filter is enabled

Frequency filter indicator (FILTER-FREQ)

Lights when the frequency filter is enabled

Storage indicator (STORE)

When you start storage, this indicator blinks at the pace at which storage is taking place.

Remote indicator (REMOTE)

Lights when the WT310/WT310HC/WT330 is in remote mode

Harmonic measurement display indicator (HARMONICS)

Lights when the harmonic measurement display is on

Key protection indicator (KEY PROTECT)

Lights when the keys are locked

7-segment LED display

Displays the measured data for the function that you select using the function key and displays menus when you are using menus to configure the settings

Function and unit indicators

Indicates the type of function and unit that are being shown on the 7-segment LED display

WT310/WT310HC

Component Names and Functions

IM WT310-02EN

1-5

1-6

IM WT310-02EN

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

Data update indicator (UPDATE)

Blinks when measurement data is being updated.

MAX HOLD indicator (MAX HOLD)

Lights when MAX HOLD is enabled

Scaling indicator (SCALING)

Lights when scaling is enabled

Averaging indicator (AVG)

Lights when averaging is enabled

Line filter indicator (FILTER-LINE)

Lights when the line filter is enabled

Frequency filter indicator (FILTER-FREQ)

Lights when the frequency filter is enabled

Storage indicator (STORE)

When you start storage, this indicator blinks at the pace at which storage is taking place.

Remote indicator (REMOTE)

Lights when the WT310/WT310HC/WT330 is in remote mode

Harmonic measurement display indicator (HARMONICS)

Lights when the harmonic measurement display is on

Key protection indicator (KEY PROTECT)

Lights when the keys are locked

7-segment LED display

Displays the measured data for the function that you select using the function key and displays menus when you are using menus to configure the settings

Function and unit indicators

Indicates the type of function and unit that are being shown on the 7-segment LED display

Wiring method indicator

Indicates the wiring method

1.2 Displayed Items

WT330

1.3 Digital Numbers and Characters

0 1 2 3 4 5 6 7 8 9

A B C D E F G H I J

K L M N O P Q R S T

Lowercase c

Lowercase h

U V W X Y Z

+ –

× ÷

^ (exponentiation)

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.

Component Names and Functions

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1.4 Keys

WT310/WT310HC WT330

Switching the Display

FUNCTION Key

Choose which function to display.

ELEMENT Key (Only on the WT330)

Choose which input element to display. The indicator of the selected element lights.

Measurement Range and Mode

VOLTAGE Key

Displays the voltage range setting menu. The AUTO indicator lights when the range is set to AUTO.

CURRENT Key

Displays the current range setting menu. The AUTO indicator lights when the range is set to AUTO.

SHIFT+VOLTAGE (MODE) Key

Switches the measurement mode.

Wiring System

WIRING Key (Only on the WT330)

Select the wiring system that corresponds to the wiring system you are using to connect to the voltage and current terminals on the rear panel.

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. The HOLD key lights. If you press HOLD again, the data starts getting updated again, and the HOLD key light turns off.

SHIFT + HOLD Key

While the numeric data is held, press SINGLE to measure data only once at the set data update interval and then update and hold the displayed values.

General-Purpose Keys

▲ and ▼ Keys

Select features and set values.

SHIFT+▼ (►) Key

Moves the digit that is being set in a value to the right (or from the farthest right position back to the farthest left position)

1.4 Keys

Component Names and Functions

SHIFT+▲ (.) Key

Moves the decimal point to the right (or from the farthest right position back to the farthest left position)

SET Key

Confirms the specified range, feature, or value

Zero-Level Compensation

SHIFT+SET Key (CAL)

Executes zero-level compensation. When zero-level compensation is executed, the WT310/WT310HC/ WT330 creates a zero input condition in its internal circuitry and sets the zero level to the level at that point.

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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

Key Lock

SHIFT+INTERFACE (KEY PROTECT) Key

Turns key protection on and off. The key protection indicator lights, and the front panel keys are locked. Press this key combination again to unlock the keys.

Other Features

SETUP Key

Set the measurement synchronization source, input filter, scaling, external 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.

SHIFT+SAVE/LOAD (HARMONICS) Key

Displays a setting menu for turning the harmonic measurement display on and off, setting the PLL source, etc.

SHIFT Key

When you press the SHIFT key once, an indicator illuminates, and you can access the features that are written in purple below each key. Pressing the key again disables the shifted state. Holding the key for at least two seconds enables SHIFT lock.

SHIFT (LOCAL) Key

Press this key to switch from remote mode (in which the REMOTE indicator is illuminated) to local mode (in which front panel key operations are valid). This key is disabled when the WT310/WT310HC/ WT330 is in local lockout mode.

1.4 Keys

Component Names and Functions

ESC Key

Pressing this key when a setup menu is showing returns the screen to the waveform data display.

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1.5 Auto Range, Overrange, and Error Indications

WT310/WT310HC WT330

During Measurement

Overrange Indication

The measured voltage and rated current values are determined to be overrange when they exceed 140% of their rated range.* When auto range is enabled, the range is automatically increased, but if a values exceeds 140% of its maximum range, it is determined to be overrange, and the following indication appears.

* On the WT310HC, the current is determined to be overrange when it exceeds 110% of the

maximum current range (40 A range).

Computation Overflow Indication

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.

Colors and Meanings of Auto Range Monitor Indicators

Color Description

Red Peak overrange Magenta Greater than 140% of the rated range (overrange) Yellow Greater than 130% of the rated range and not more than 140% (condition for raising the auto range) Cyan 30% or less of the rated range (condition for reducing the auto range)

If the range is already at the minimum measurement range, this indicator will not light even when values are 30% or less of the rated range.

1 On the WT310HC, the current is determined to be overrange when it exceeds 110% of the maximum current

range (40 A range).

2 On the WT310HC, the current is determined to be overrange when it exceeds 100% of the maximum current

range (40 A range).

Indications When the Measured Value Is Too Small

When the measured voltage or current is 0.5% or less of the rated range (1% or less when the crest factor is set to 6), the following indications appear. These indications only appear when the measurement mode is RMS or VOTLAGE MEAN.

Function Indication

Voltage, current, apparent power, or reactive power A zero appears. Power factor or phase angle

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.

1.5 Auto Range, Overrange, and Error Indications During Measurement

Error

Displayed in cases such as when a measured value is outside of its determined range.

Component Names and Functions

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1.6 System Configuration

Power Supply

Load

Voltage

(Apply one of them.)

Current

(Apply one of them.)

Current sensor (optional)

Remote control signal (optional)

Internal memory

Numeric data storage

Recorder

Numeric data

Setup parameters

Printer

Integration start Integration stop Hold/ single

USB interface/ GP-IB interface

/ RS-232 interface*/ Ethernet interface (optional)

D/A output (option)

Measured values are transmitted as DC voltages.

WT310/WT310HC/WT330

* The WT310/WT310HC/WT330 is standard-equipped with a GP-IB or RS-232 interface (whichever

you choose).

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+ 92 hidden pages

YOKOGAWA WT310, WT330, WT310HC User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual

Checking the Contents of the Package

Safety Precautions

Waste Electrical and Electronic Equipment

New EU Battery Directive

Conventions Used in This Manual

Workflow

Contents

Chapter 1 Component Names and Functions

1.1 Front Panel, Rear Panel, and Top Panel

1.2 Displayed Items

1.3 Digital Numbers and Characters

1.4 Keys

1.6 System Configuration