YOKOGAWA WT333E User Manual

IM WT310E-01EN
2nd Edition
User’s Manual
WT310E/WT310EH/WT332E/WT333E
Digital Power Meter

YOKOGAWA WT333E Specifications

General

Type	Digital Power Meter
Channels	3
Power Measurement	Active, Reactive, Apparent Power
Display	LCD
Basic Accuracy	0.1%
Communication Interface	USB, Ethernet
Measurement Category	CAT II 600V

Summary

Chapter 1 Features

1.1 Items That This Instrument Can Measure (Measurement functions)

Lists measurable items and explains functions for WT310E/WT310EH and WT332E/WT333E.

Measurement Functions Used in Harmonic Measurement (Option)

Lists harmonic measurement functions and their applicability for optional harmonic analysis.

1.2 Measurement Conditions

Explains essential settings for accurate measurements, including modes, wiring, and ranges.

Voltage and Current Measurement Modes

Explains RMS, MEAN, and DC modes for voltage and current measurements.

Wiring Systems

Details wiring system configurations for different instrument models (WT332E/WT333E).

Measurement Ranges

Explains fixed and auto range settings for voltage and current measurements.

Crest Factor

Defines crest factor and its impact on measurement range settings.

1.3 Holding Measured Values and Performing Single Measurements

Explains features for freezing displayed values and taking single measurements.

1.4 Measuring Power

Covers displaying and calculating power-related measurements.

1.5 Integrated Power (Watt hour)

Explains how to integrate active power and current over time.

1.6 Harmonic Measurement (Option)

Describes optional harmonic analysis capabilities.

Saving and Loading Setup Parameters

Explains how to save and load instrument setup configurations.

1.8 Communication Functions

Details how to connect and communicate with the instrument via PC.

Chapter 2 Measurement Conditions

2.1 Setting the Measurement Mode

Explains how to select measurement modes for voltage and current.

2.2 Configuring the Wiring System Settings (WT332E/WT333E only)

2.3 Setting the Measurement Range When Using Direct Input

Explains how to set measurement ranges for direct input signals.

Fixed (Manual) Ranges and Auto Range

Explains setting fixed manual ranges versus automatic range selection.

2.4 Setting the Measurement Ranges When Using an External Current Sensor (Option)

External Current Sensor Scaling Constant

Explains how to set the scaling constant for external current sensors.

2.5 Setting the Scaling Feature When Using a VT or CT

Explains how to configure scaling coefficients for voltage/current transformers.

Scaling Coefficients

Details setting VT ratio, CT ratio, and power coefficient for scaling.

2.7 Setting the Crest Factor

Explains how to set the crest factor for waveform analysis.

2.8 Setting the Measurement Period

Synchronization Source

2.10 Setting the Data Update Interval

Chapter 3 Holding Measured Values and Performing Single Measurements

Chapter 4 Measuring Power

4.1 Displaying Voltages, Currents, and Active Powers

4.2 Displaying Apparent Powers, Reactive Powers, and Power Factors

4.3 Displaying Phase Angles and Frequencies

4.4 Displaying Peak Values

4.5 Displaying the Efficiency (WT332E/WT333E only), Crest Factors, the Results of Computations Using Basic Arithmetic, and Average Active Powers

Covers advanced calculations like efficiency, crest factor, and basic arithmetic.

Computation Functions

Lists and explains the available computation functions.

4.6 Setting the MAX Hold Feature

Chapter 5 Integration

5.1 Integration Feature

5.2 Setting the Integration Mode and Timer

Explains how to set the integration mode and timer values.

Integration Mode

Integration Timer

5.3 Displaying Integrated Values

Starting and Stopping Integration

Chapter 6 Harmonic Measurement (Option)

6.1 Harmonic Measurement Feature

6.3 Setting the PLL Source, Measured Harmonic Order, and THD Equation

Covers key settings for harmonic analysis: PLL source, order, and THD equation.

PLL Source

Chapter 7 Storing Measured Data and Saving and Loading Setup Parameters

Turning Measured Data Storage On and Off

7.2 Saving and Loading Setup Parameters

Saving Setup Parameters

Appendix 3 Power Range

Appendix 4 Setting the Measurement Period

Appendix 5 Measurement Accuracy and Measurement Error