YOKOGAWA WT110 User Manual

IM 253401-01E
8
Contents
Foreword ............................................................................................................................................................................. 1
Checking the Contents of the Package..................................................................................................... 2
Safety Precautions...................................................................................................................................................... 4
How to Use this Manual .......................................................................................................................................... 6
Conventions Used in this Manual .................................................................................................................. 7
Chapter 1 What this Instrument Can Do
1.1 System Configuration and Block Diagram ..................................................................................1-1
1.2 Functions ......................................................................................................................................1-2
1.3 Digital Numbers/Characters, and Initial Menus ..........................................................................1-5
Chapter 2 Nomenclature, Keys and Displays
2.1 Front Panel, Rear Panel and Top View........................................................................................ 2-1
2.2 Operation Keys and Function/Element Display ..........................................................................2-2
2.3 Displays in case of Overrange/Error during Measurement ......................................................... 2-4
Chapter 3 Before Operation
3.1 Usage Precautions ........................................................................................................................ 3-1
3.2 Installing the Instrument ..............................................................................................................3-2
3.3 Wiring Precautions ......................................................................................................................3-4
3.4 Wiring the Measurement Circuit .................................................................................................3-5
3.5 Wiring the Measurement Circuit when Using External PT/CT ...................................................3-7
3.6 Wiring the Measurement Circuit when Using the External Sensor ............................................. 3-9
3.7 Connecting the Power Supply.................................................................................................... 3-12
3.8 Turning the Power ON/OFF ...................................................................................................... 3-13
3.9 Selecting the Wiring Method (for WT130) ..............................................................................3-15
3.10 Improving the Measurement Accuracy......................................................................................3-16
Chapter 4 Setting Measurement Conditions
4.1 Selecting the Measurement Mode................................................................................................ 4-1
4.2 Turning the Filter ON/OFF .......................................................................................................... 4-3
4.3 Selecting the Measurement Range in case of Direct Input ..........................................................4-4
4.4 Setting the Scaling Value when External PT/CT is Used ............................................................4-6
4.5 Selecting the Measurement Range and Setting the Scaling Value when External Sensor is
Used (option) ...............................................................................................................................4-8
4.6 Using the Averaging Function ................................................................................................... 4-10
4.7 Using the Four Arithmetical Operation Function (Applies to WT110/WT130 with ROM
Version 2.01 or later) .................................................................................................................4-12
4.8 Computing the Crest Factor (Applies to WT110/WT130 with ROM Version 2.01 or later) ....4-15
4.9 Computing the Efficiency (Applies to WT130 with ROM Version 2.01 or later) ....................4-16
Chapter 5 Measuring/Displaying Voltage, Current, Active Power, Frequency,
Four Arithmetic Operation Value, Crest Factor and Peak Value
5.1 Measuring/Displaying Voltage, Current and Active Power ........................................................ 5-1
5.2 Measuring/Displaying Frequency ................................................................................................ 5-3
5.3 Measuring/Displaying Four Arithmetic Operation Value, Crest Factor and Peak Value ...........5-4

YOKOGAWA WT110 Specifications

General

Brand	YOKOGAWA
Model	WT110
Category	Measuring Instruments
Language	English