YOKOGAWA WT1801E User manual

IM WT1801E-02EN
3rd Edition
Precision Power Analyzer
WT1801E, WT1802E, WT1803E,
WT1804E, WT1805E, WT1806E

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Thank you for purchasing the WT1801E, WT1802E, WT1803E, WT1804E, WT1805E, or WT1806E
Precision Power Analyzer. This User’s Manual explains how to use this instrument. 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 a question arises.
List of Manuals
The following manuals, including this one, are provided as manuals for this instrument. Please read all
the manuals.
Manual Title Manual No. Description
WT1801E, WT1802E, WT1803E,
WT1804E, WT1805E, WT1806E
Precision Power Analyzer
Features Guide
IM WT1801E-01EN
The supplied CD contains the PDF file of this manual.
This manual explains all the features of this instrument
other than the communication interface features.
WT1801E, WT1802E, WT1803E,
WT1804E, WT1805E, WT1806E
Precision Power Analyzer
User’s Manual
IM WT1801E-02EN This manual. The supplied CD contains the PDF
file of this manual. The manual explains how to
operate this instrument.
WT1801E, WT1802E, WT1803E,
WT1804E, WT1805E, WT1806E
Precision Power Analyzer
Getting Started Guide
IM WT1801E-03EN This guide explains the handling precautions and
basic operations of this instrument.
WT1801E, WT1802E, WT1803E,
WT1804E, WT1805E, WT1806E
Precision Power Analyzer
Communication Interface
User’s Manual
IM WT1801E-17EN
The supplied CD contains the PDF file of this manual.
This manual explains the communication interface
features of this instrument and how to use them.
WT1801E, WT1802E, WT1803E,
WT1804E, WT1805E, WT1806E
Precision Power Analyzer
IM WT1801E-92Z1 Document for China
The “EN” and “Z1” in the manual numbers are the language codes.
Contact information of Yokogawa offices worldwide is provided on the following sheet.
Document No. Description
PIM 113-01Z2 List of worldwide contacts
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 to ensure the accuracy of its
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
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.
3rd Edition: October 2017 (YMI)
All Rights Reserved, Copyright © 2016 Yokogawa Test & Measurement Corporation

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Trademarks
• Microsoft, Internet Explorer, MS-DOS, Windows, Windows Vista, Windows 7, Windows 8, Windows
8.1, and Windows 10 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 trademarks of Adobe Systems Incorporated.
• Modbus is a registered trademark of AEG Schneider.
• In this manual, the ® and TM 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
• 1st Edition: September 2016
• 2nd Edition: June 2017
• 3rd Edition: October 2017
List of Manuals

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Symbols and Notation Used in This Manual
Notes and Cautions
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 manual, the symbol is used in conjunction with the word “WARNING” or
“CAUTION.”
WARNING 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.
CAUTION Calls attention to actions or conditions that could cause light injury to the user or
damage to the instrument or user’s data, and precautions that can be taken to
prevent such occurrences.
French
AVERTISSEMENT Attire l’attention sur des gestes ou des conditions susceptibles
de provoquer des blessures graves (voire mortelles), et sur les
précautions de sécurité pouvant prévenir de tels accidents.
ATTENTION Attire l’attention sur des gestes ou des conditions susceptibles de
provoquer des blessures légères ou d’endommager l’instrument ou les
données de l’utilisateur, et sur les précautions de sécurité susceptibles
de prévenir de tels accidents.
Note Calls attention to information that is important for proper operation of the
instrument.
Units
k Denotes 1000. Example: 100 kHz
K Denotes 1024. Example: 720 KB (file size)

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Key Operation and Functions
Key Operation
How to Use Setup Menus That Appear When Keys Are Pressed
The operation after you press a key varies depending on the key that you press.
F
G
Line Filter Menu
A
B
C
H
D
E
Numeric (4) Menu Measure Menu Numeric Form Menu
A: Press the soft key to use the cursor keys to configure this setting. Use the cursor keys to set the
value or select an item.
B: A related setup menu appears when you press the soft key.
C: The selected setting switches each time you press the soft key.
D: A dialog box or the keyboard appears when you press the soft key.
Use the cursor keys and the SET key to configure the settings.
E: Press the soft key to display a selection menu.
Press the soft key that corresponds to the appropriate setting.
F: Press the soft key to use the cursor keys to configure this setting. After you configure the setting,
the status of the selected setting switches each time you press the soft key.
G: Press the soft key to execute the specified feature.
H: Press the soft key to apply the value assigned to the key.
How to Display the Setup Menus That Are Written in Purple below the Keys
In the explanations in this manual, “SHIFT+key name (written in purple)” is used to indicate the
following operation.
1. Press SHIFT. The SHIFT key lights to indicate that the keys are shifted.
Now you can select the setup menus written in purple below the keys.
2. Press the key that you want to display the setup menu of.
ESC Key Operation
If you press ESC when a setup menu or available options are displayed, the screen returns to the
menu level above the current one. If you press ESC when the highest level menu is displayed, the
setup menu disappears.

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RESET Key Operation
If you press RESET when you are using the cursor keys to set a value or select an item, the setting
is reset to its default value (depending on the operating state of this instrument, the setting may not
be reset).
SET Key Operations
The operation varies as indicated below depending on what you are setting.
• For a setup menu that has two values that you use the cursor keys to adjust
Press
SET to switch the value that the cursor keys adjust.
• For a menu that has the cursor keys + SET mark (
+
SET
) displayed on it
Press
SET to confirm the selected item.
Cursor Keys Operations
The operation varies as indicated below depending on what you are setting.
• When setting a value
Up and down cursor keys: Increases and decreases the value
Left and right cursor keys: Changes which digit to set
• When selecting the item to set
Up and down cursor keys: Moves the cursor between settings
How to Enter Values in Setup Dialog Boxes
1. Use the keys to display the appropriate setup dialog box.
2. Use the cursor keys to move the cursor to the item that you want to set.
3. Press SET. The operation varies as indicated below depending on what you are setting.
• A selection menu appears.
• A check box is selected or cleared.
• An item is selected.
• A table of settings is selected.
Displaying a Selection Menu and Selecting an Item
Select OFF or ON.
Displays the selection
menu
After selecting an item
with the cursor keys,
press SET to confirm it.
Setting Items in a Table
After moving the cursor to the table, press SET
to select the setting that you want to change.
Use the cursor keys and the SET key to
select a table entry.
How to Clear Setup Dialog Boxes
Press ESC to clear the setup dialog box from the screen.
Key Operation and Functions

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Entering Values and Strings
Entering Values
Using the Cursor Keys to Enter Values
Select the appropriate item using the soft keys, and change the value using the cursor keys and the
SET key. This manual sometimes describes this operation simply as “using the cursor keys.”
Note
Some items that you can set using the cursor keys are reset to their default values when you press the
RESET key.
Entering Character Strings
Use the keyboard that appears on the screen to enter character strings such as file names and
comments. Use the cursor keys and the SET key to operate the keyboard and enter a character string.
How to Operate the Keyboard
1. After bringing up the keyboard, use the cursor keys to move the cursor to the character that
you want to enter.
2. Press SET to enter the character.
• If a character string has already been entered, use the arrow soft keys (<and >) to move the cursor to
the position you want to insert characters into.
• To switch between uppercase and lowercase letters, move the cursor to CAPS on the keyboard, and
then press SET.
• To delete the previous character, press the Back Space soft key.
• To delete all the characters, press the All Clear soft key.
3. Repeat steps 1 and 2 to enter all the characters in the string.
• Select on the keyboard or press the History soft key to display a list of character strings that you
have entered previously. Use the cursor keys to select a character string, and press SET to enter the
selected character string.
• Select on the keyboard to display a list of preset character strings. The following operands and
equations, which are used with user-defined functions, are included as preset character strings.
ABS( PPK( HVF( RMS(
SQR( MPK( HCF( MN(
SQRT( CF KFACT( RMN(
LOG( TI( EAU( DC(
LOG10( THD( EAI( AC(
EXP( THF( PLLFRQ( PC(
NEG( TIF(
Use the cursor keys to select a character string, and press SET to enter the selected character string.
4. Press the ENTER soft key, or move the cursor to ENTER on the keyboard, and press SET to
confirm the character string and clear the keyboard.

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Character insertion position
Enter a character string from the history.
Confirms the characters that
you have entered
Deletes the previous character
Moves the character insertion
position
Deletes all characters
Enter a character string from
the history.
Input History: A List of Previously Entered Character Strings
After selecting an item with the cursor
keys, press SET to confirm it.
Enter a preset character string.
Note
• @ cannot be entered consecutively.
• File names are not case-sensitive. Comments are case-sensitive. The following file names cannot be
used due to MS-DOS limitations:
AUX, CON, PRN, NUL, CLOCK, COM1 to COM9, and LPT1 to LPT9
• For details on file name limitations, see the features guide, IM WT1801E-01EN.
Entering Values and Strings

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Contents
List of Manuals...................................................................................................................................i
Symbols and Notation Used in This Manual.................................................................................... iii
Key Operation and Functions ..........................................................................................................iv
Entering Values and Strings.............................................................................................................vi
Chapter 1 Basic Measurement Conditions
1.1 Configuring the Wiring System Settings........................................................................... 1-1
1.2 Setting the Voltage and Current Ranges.......................................................................... 1-2
1.3 Setting the External Current Sensor Range (Option) ....................................................... 1-4
1.4 Setting the External Current Sensor Conversion Ratio (Option) ...................................... 1-5
1.5 Setting the Display Format of the External Current Sensor Range (Option).................... 1-6
1.6 Setting the Scaling Feature When Using a VT or CT....................................................... 1-7
1.7 Setting the Valid Measurement Range ............................................................................. 1-9
1.8 Setting the Efficiency Equation....................................................................................... 1-12
1.9 Turning the Independent Input Element Configuration On and Off ................................ 1-13
1.10 Setting Delta Computation ............................................................................................. 1-14
1.11 Setting the Crest Factor ................................................................................................. 1-15
1.12 Setting Measurement Periods ........................................................................................ 1-16
1.13 Setting Line Filters.......................................................................................................... 1-17
1.14 Setting Frequency Filters ............................................................................................... 1-18
1.15 Setting the Data Update Interval .................................................................................... 1-19
1.16 Setting Averaging ........................................................................................................... 1-20
1.17 Displaying the Menu for Configuring All Elements ......................................................... 1-21
1.18 Displaying the Setup Parameter List .............................................................................. 1-22
Chapter 2 Harmonic Measurement Conditions (Option)
2.1 Setting Harmonic Measurement Conditions..................................................................... 2-1
Chapter 3 Motor Evaluation Conditions (Option)
3.1 Setting Motor Evaluation Conditions ................................................................................ 3-1
Chapter 4 Auxiliary Input Conditions (Option)
4.1 Setting Auxiliary Input Conditions..................................................................................... 4-1
Chapter 5 Holding Measured Values and Performing Single Measurements
5.1 Holding Measured Values................................................................................................. 5-1
5.2 Performing Single Measurements .................................................................................... 5-2
Chapter 6 Power Measurement (Numeric Data Display)
6.1 Setting the Display Format ............................................................................................... 6-1
6.2 Switching the Displayed Page.......................................................................................... 6-2
6.3 Changing the Displayed Items on the 4 Items, 8 Items, and 16 Items Displays .............. 6-4
6.4 Changing the Displayed Items on the Matrix Display....................................................... 6-6
6.5 Changing the All Items Display......................................................................................... 6-9
6.6 Changing the Harmonics List Display (Option) .............................................................. 6-10
6.7 Setting the Custom Display ............................................................................................ 6-12

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Alert mark 19.1
Chapter 7 Computations
7.1 Setting User-Defined Functions ....................................................................................... 7-1
7.2 Setting User-Defined Events ............................................................................................ 7-2
7.3 Setting Apparent Power, Reactive Power, and Corrected Power Equations.................... 7-3
7.4 Setting the Sampling Frequency ...................................................................................... 7-4
7.5 Setting the Phase Difference Display Format................................................................... 7-5
7.6 Setting Master and Slave Synchronized Measurement ................................................... 7-6
7.7 Setting the Voltages or Currents Whose Frequencies Will Be Measured ........................ 7-7
Chapter 8 Integrated Power (Watt hour)
8.1 Setting Independent Integration ....................................................................................... 8-1
8.2 Setting Integration Conditions .......................................................................................... 8-2
8.3 Starting, Stopping, and Resetting Integration................................................................... 8-5
8.4 Integration Resume Action at Power Failure Recovery.................................................... 8-6
Chapter 9 Waveform Display
9.1 Setting the Display Format ............................................................................................... 9-1
9.2 Turning the Display of Waveforms On and Off and Setting the Vertical Zoom Factors and
Vertical Positions .............................................................................................................. 9-3
Chapter 10 Trend Display
10.1 Setting the Display Format ............................................................................................. 10-1
10.2 Turning the Trend Display On and Off and Setting the Measurement Functions to Display
and the Vertical Scales................................................................................................... 10-3
Chapter 11 Bar Graph Display (Option)
11.1 Setting the Display Format ..............................................................................................11-1
11.2 Setting the Measurement Function to Display and the Vertical Scale.............................11-2
Chapter 12 Vector Display (Option)
12.1 Setting the Display Format ............................................................................................. 12-1
12.2 Setting the Element and Wiring Unit to Display and the Zoom Factor ........................... 12-2
Chapter 13 Split Display
13.1 Configuring the Split Display .......................................................................................... 13-1
Chapter 14 Cursor Measurements
14.1 Performing Cursor Measurements on Waveforms ......................................................... 14-1
14.2 Performing Cursor Measurements on Trends ................................................................ 14-2
14.3 Performing Cursor Measurements on Bar Graphs......................................................... 14-3
Chapter 15 High Speed Data Capturing
15.1 Setting the Number of Data Captures and Configuring the Capture Control Settings ... 15-1
15.2 Configuring the Save Conditions of Captured Numeric Data ......................................... 15-4
15.3 Changing the Displayed Items for High Speed Data Capturing ..................................... 15-6
15.4 Starting and Stopping High Speed Data Capturing........................................................ 15-9
Chapter 16 Storing Data
16.1 Configuring Storage Control........................................................................................... 16-1
16.2 Setting the Numeric Data Items to Store........................................................................ 16-4
16.3 Configuring the Save Conditions of Stored Numeric Data ............................................. 16-5
16.4 Starting, Stopping, and Resetting Storage ..................................................................... 16-6
Contents

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Contents
Chapter 17 Saving and Loading Data
17.1 Connecting USB Memory Devices ................................................................................. 17-1
17.2 Saving Setup Parameters .............................................................................................. 17-3
17.3 Saving Waveform Display Data...................................................................................... 17-5
17.4 Saving Numeric Data ..................................................................................................... 17-6
17.5 Loading Setup Parameters............................................................................................. 17-8
17.6 File Operations ............................................................................................................... 17-9
Chapter 18 Saving Screen Images
18.1 Saving Screen Images ................................................................................................... 18-1
Chapter 19 Printing Screen Images and Numeric Data (Option)
19.1 Loading Roll Paper into the Built-In Printer (Option) ...................................................... 19-1
19.2 Printing Using the Built-in Printer (Option) ..................................................................... 19-5
Chapter 20 Ethernet Communication
20.1 Connecting this instrument to a Network........................................................................ 20-1
20.2 Configuring TCP/IP Settings........................................................................................... 20-3
20.3 Accessing this instrument from a PC (FTP Server)........................................................ 20-4
20.4 Monitoring the display of this instrument from a PC (Web Server)................................. 20-5
20.5 Connecting to a Network Drive....................................................................................... 20-8
20.6 Using SNTP to Set the Date and Time........................................................................... 20-9
Chapter 21 Other Features
21.1 Viewing System Information (Overview)......................................................................... 21-1
21.2 Initializing Settings.......................................................................................................... 21-2
21.3 Setting the Message, Menu, and USB Keyboard Languages ........................................ 21-3
21.4 Setting the Screen Brightness and Configuring the Display Color Settings ................... 21-4
21.5 Configuring the Environment Settings............................................................................ 21-5
21.6 Configuring D/A Output Items (Option)........................................................................... 21-6
21.7 Carrying Out Self-Tests (Selftest)................................................................................... 21-7
21.8 Performing Zero-Level Compensation ........................................................................... 21-9
21.9 Using the NULL Feature............................................................................................... 21-10
21.10 Locking the Keys ...........................................................................................................21-11
Appendix
Appendix 1 Messages and Corrective Actions ........................................................................ App-1
Index

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1.1 Configuring the Wiring System Settings
This section explains the following settings for wiring systems:
• Wiring system
• Wiring unit
• Wiring pattern
►“Wiring System (Wiring)” in the features guide
Wiring Settings (Wiring Settings)
Press WIRING and then the Wiring soft key to display the following screen.
Set the wiring system (1P2W, 1P3W, 3P3W, 3P4W, 3P3W(3V3A)).
When you select an input element, the wiring systems that you can select are displayed. Select the wiring
system from those displayed.
Wiring System Pattern
• If you select 1P3W, 3P3W, 3P4W, or 3P3W(3V3A) for the wiring system, the wiring unit is set with the two
or three input elements adjacent to the selected element whose element numbers are larger than the
selected element.
• On models that have six input elements installed, up to three wiring units (ΣA, ΣB, and ΣC) are
automatically set. The wiring unit symbols ΣA, ΣB, and ΣC are attached to the element numbers in order,
starting with the smallest number.
Note
• Because the wiring system with the largest element number is automatically determined according to the
settings of the wiring systems with smaller element numbers, the element with the largest element number
cannot be selected.
• You cannot set the wiring units for larger element numbers before the wiring units for smaller element
numbers.
• Tomeasurevoltage,current,andactivepowerΣfunctionsusinghighspeeddatacapturing,setthewiring
system to 3P4W or 3P3W (3V3A). When the wiring system is set to 1P3W or 3P3W, voltage, current, and
activepowerΣfunctionsarenotmeasured.
Chapter 1 Basic Measurement Conditions

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1.2 Setting the Voltage and Current Ranges
This section explains the following settings for the voltage and current ranges:
• Input element
• Auto range
• Fixed range
►“Voltage Range (RANGE UP/DOWN (V))” and “Current Range (RANGE UP/DOWN (A))”
in the features guide
Voltage Range (VOLTAGE RANGE)
1. Press the ELEMENT key for setting ranges to select the input element or wiring unit that you
want to set the voltage range of.
• While the setup menu is displayed, press ESC. Information corresponding to the input elements or
wiring units will be displayed highlighted on the menu. You can also use the soft keys corresponding to
the highlighting to select the input element or wiring unit.
• Press SHIFT+the ELEMENT (ALL) key for setting ranges to collectively configure all the input elements
for which the following conditions are met.
The input element type (for 5 A or for 50 A) is the same.
The valid measurement range setting (see section 1.7) is the same.
2. Follow the instructions below to set the voltage range.
Auto Range Setting
Press the voltage range’s AUTO key.
Setting the Fixed Range
Press the voltage range’s fixed rangekeys(▲and▼)tosetthevoltagerange.
Available Voltage Range Options
When the crest factor is set to 3 When the crest factor is set to 6 or 6A
1.5 V, 3 V, 6 V, 10 V, 15 V, 30 V, 60 V, 100 V, 150 V,
300 V, 600 V, 1000 V
0.75 V, 1.5 V, 3 V, 5 V, 7.5 V, 15 V, 30 V, 50 V, 75 V,
150 V, 300 V, 500 V
Voltage range display
ELEMENT key for
setting ranges
Note
When Element Independent (see section 1.9) is set to OFF, the voltage ranges of input elements that are
assigned to the same wiring unit are set to the same range. When Element Independent is set to ON, you
can set the voltage range of input elements that are assigned to the same wiring unit separately.

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Current Range (CURRENT RANGE)
1. Press the ELEMENT key for setting ranges to select the input element or wiring unit that you
want to set the current range of.
• While the setup menu is displayed, press ESC. Information corresponding to the input elements or
wiring units will be displayed highlighted on the menu. You can also use the soft keys corresponding to
the highlighting to select the input element or wiring unit.
• Press SHIFT+the ELEMENT (ALL) key for setting ranges to collectively configure all the input elements
for which the following conditions are met.
The input element type (for 5 A or for 50 A) is the same.
The valid measurement range setting (see section 1.7) is the same.
2. Follow the instructions below to set the current range.
Auto Range Setting
Press the current range’s AUTO key.
Setting the Fixed Range
Press the current range’s fixed rangekeys(▲and▼)tosetthecurrentrange.
Available Current Range Options
• 5 A Input Element
When the crest factor is set to 3 When the crest factor is set to 6 or 6A
10 mA, 20 mA, 50 mA, 100 mA, 200 mA, 500 mA,
1 A, 2 A, 5 A
5 mA, 10 mA, 25 mA, 50 mA, 100 mA, 250 mA,
500 mA, 1 A, 2.5 A
• 50 A Input Element
When the crest factor is set to 3 When the crest factor is set to 6 or 6A
1 A, 2 A, 5 A, 10 A, 20 A, 50 A 500 mA, 1 A, 2.5 A, 5 A, 10 A, 25 A
Current range display
ELEMENT key for
setting ranges
Note
When Element Independent (see section 1.9) is set to OFF, the current ranges of input elements that are
assigned to the same wiring unit are set to the same range. When Element Independent is set to ON, you
can set the current range of input elements that are assigned to the same wiring unit separately.
1.2 Setting the Voltage and Current Ranges

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1.3 Setting the External Current Sensor Range
(Option)
This section explains the following settings for external current sensor ranges (current ranges that are
used when external current sensors are being used). This feature is available on models with the /EX1
to /EX6 option.
• Input element
• External current sensor
• Auto range
• Fixed range
►“External Current Sensor Range (EXT SENSOR; option)” in the features guide
1. Press the ELEMENT key for setting ranges to select the input element or wiring unit that you
want to set the external current sensor range of.
• While the setup menu is displayed, press ESC. Information corresponding to the input elements or
wiring units will be displayed highlighted on the menu. You can also use the soft keys corresponding to
the highlighting to select the input element or wiring unit.
• Press SHIFT+the ELEMENT (ALL) key for setting ranges to collectively configure all the input elements
for which the following conditions are met.
The input element type (for 5 A or for 50 A) is the same.
The valid measurement range setting (see section 1.7) is the same.
2. Press EXT SENSOR to illuminate the EXT SENSOR key.
Press EXT SENSOR again to turn the EXT SENSOR key off. In this state, you can set the current range
that is used when current is applied directly to this instrument (see section 1.2).
3. Follow the instructions below to set the external current sensor range.
Auto Range Setting
Press the current range’s AUTO key.
Setting the Fixed Range
Press the current range’s fixed rangekeys(▲and▼)tosettheexternalcurrentsensorrange.
Available External Current Sensor Range Options
When the display format of the external current sensor range is set to DIRECT, you can select
the range from the available options shown in the following table (the unit is mV or V). When the
display format is set to MEAS, the setup range is set to the value from the following table divided
by the external current sensor conversion ratio (the unit is A). For instructions on how to set the
display format of the external current sensor range, see section 1.5.
When the crest factor is set to 3 When the crest factor is set to 6 or 6A
50 mV, 100 mV, 200 mV, 500 mV, 1 V, 2 V, 5 V, 10 V 25 mV, 50 mV, 100 mV, 250 mV, 500 mV, 1 V, 2.5 V,
5 V
External current sensor range display
ELEMENT key for
setting ranges
Note
When Element Independent (see section 1.9) is set to OFF, the external current sensor ranges of input
elements that are assigned to the same wiring unit are set to the same range. When Element Independent
is set to ON, you can set the external current sensor range of input elements that are assigned to the same
wiring unit separately.

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1.4 Setting the External Current Sensor
Conversion Ratio (Option)
This section explains the following settings for the external current sensor conversion ratio. This
feature is available on models with the /EX1 to /EX6 option.
• Conversion ratio
• Copying the conversion ratio
►“External Current Sensor Conversion Ratio (SENSOR RATIO; option)” in the features guide
Sensor Ratio Menu
Press SHIFT+EXT SENSOR (SENSOR RATIO) to display the following menu.
Set the conversion ratio (0.0001 to 99999.9999).
Copies the conversion ratio
The conversion ratio of the input element that is indicated by the cursor is copied to all
the input elements in that element’s wiring unit.
Cursor (use the ◄► cursor keys to move it)
Note
When using the dedicated shunt box, you can select an external current sensor conversion ratio preset in the
menu for configuring all elements (see section 1.17).
External Current Sensor Range and Conversion Ratio Configuration Example
When measuring a current with a maximum value of 100 A using a current sensor that produces 10 mV when
1 A of current is flowing, the maximum voltage that the current sensor produces is 10 mV/A × 100 A = 1 V.
Therefore, configure the settings as indicated below.
• External current sensor range: 1 V
• External current sensor conversion ratio: 10 mV/A

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1.5 Setting the Display Format of the External
Current Sensor Range (Option)
This section explains the following setting for the external current sensor range. This feature is
available on models with the /EX1 to /EX6 option.
• Display format
►“External Current Sensor Range Display Format (DIRECT/MEASURE; option)”
in the features guide
1. Press the ELEMENT key for setting ranges to select the input element or wiring unit that you
want to set the external current sensor range of.
• If you press ESC to clear the setup menu from the screen, soft keys corresponding to the input elements
or wiring units will be displayed on the menu. You can use these soft keys to select the input element or
wiring unit.
• Press SHIFT+the ELEMENT (ALL) key for setting ranges to collectively configure all the input elements
for which the following conditions are met.
The input element type (for 5 A or for 50 A) is the same.
The valid measurement range setting (see section 1.7) is the same.
2. Press EXT SENSOR to illuminate the EXT SENSOR key.
Press EXT SENSOR again to turn the EXT SENSOR key off.
3. Press SHIFT+the current range’s CONFIG (DIRECT/MEASURE) key. The DIRECT indicator
or MEAS indicator, which indicates the display format, illuminates. The external current sensor
range is displayed in the indicated display format.
Press SHIFT+the current range’s CONFIG (DIRECT/MEASURE) key again to switch the display format.
The indicators illuminate and turn off appropriately.
External current sensor range display
(Display example of when the display format
is set to MEASURE.)
Display format indicators
(DIRECT, MEASURE)
ELEMENT key for
setting ranges

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1.6 Setting the Scaling Feature When Using a VT
or CT
This section explains the following settings for measuring voltage through an external VT (voltage
transformer) and current that through an external CT (current transformer):
• Turning the scaling feature on and off
• VT ratio
• CT ratio
• Power coefficient
►“Scaling (SCALING)” in the features guide
Scaling Menu
Press SCALING to display the following menu.
Turns the scaling feature on and off*
Set the VT ratio.
Set the CT ratio.
Set the power coefficient.
* When you want to multiply the external current sensor output by the
conversion ratio and read the current of the circuit under
measurement directly, turn the VT/CT scaling feature off. If it is
turned on, the value will be further multiplied by the CT ratio.
Display the menu for configuring all elements (see section 1.17).
Setting the VT Ratio (VT Scaling)
Press the VT Scaling soft key to display the following menu.
Set the VT ratio (0.0001 to 99999.9999).
Copies the VT ratio
The VT ratio of the input element that is indicated by the cursor is copied to all the input
elements in that element’s wiring unit.
Cursor (use the ◄► cursor keys to move it)

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Setting the CT Ratio (CT Scaling)
Press the CT Scaling soft key to display the following menu.
Set the CT ratio.
Copies the CT ratio
The CT ratio of the input element that is indicated by the cursor is copied to all the input
elements in that element’s wiring unit.
Cursor (use the ◄► cursor keys to move it)
Note
When using the dedicated CT, you can select a CT ratio preset in the menu for configuring all elements (see
section 1.17).
Setting the Power Coefficient (SF Scaling)
Press the SF Scaling soft key to display the following menu.
Set the power coefficient.
Copies the power coefficient
The power coefficient of the input element that is indicated by the cursor is copied to all the
input elements in that element’s wiring unit.
Cursor (use the ◄► cursor keys to move it)
1.6 Setting the Scaling Feature When Using a VT or CT

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1.7 Setting the Valid Measurement Range
This section explains the following settings for the valid measurement range:
• Valid measurement range
• Measurement ranges that this instrument can switch to when a peak over-range occurs
►“Valid Measurement Range (CONFIG (V)/CONFIG (A))” in the features guide
Setting the Valid Voltage Measurement Range (Voltage Range
Configuration)
Press the voltage range’s CONFIG key to display the following screen.
Valid measurement range
• The measurement range switches (in order) between the ranges whose check boxes
are selected.
• Ranges whose check boxes are not selected are skipped.
• When Element Independent (see section 1.9) is set to OFF, the input elements that are
assigned to the same wiring unit are set to the same status.
Available voltage range options
Measurement range to switch to when a peak over-range occurs
• When Element Independent is set to OFF, the input elements that are
assigned to the same wiring unit are set to the same range.
• If auto range is on (you can turn it on by pressing
AUTO), this instrument
operates as follows:
• When a peak over-range occurs, the measurement range increases to the
range specified here, skipping the ranges in between.
• When the measurement range to switch to when a peak over-range occurs
is set to OFF, the measurement range increases in the order specified by
the measurement ranges whose check boxes have been selected.
If the measurement range to switch to when a peak over-range occurs
has been selected, the range background is displayed in yellow.
For each input element or wiring unit,
you can set all ranges as valid
measurement ranges (All ON).
Available options for the measurement
ranges that this instrument can switch
to when a peak over-range occurs
For each range, you can
set whether the range is a
valid measurement range
for all input elements (All
ON) or not (All OFF).
Slot in which an input element is not installed