Atec WT1800 User Manual

High Performance Power Analyzer WT1800

WT1800

High Performance Power Analyzer

Broad Ranges Power Measurement

with One Unit

Basic Power Accuracy ±0.1% DC Power Accuracy ±0.05% Voltage/Current Bandwidth 5 MHz Sampling Rate Approx. 2 MS/s (16-bit) Input Elements Max. 6 Current Measurement 100 μ A to 55 A

Innovative Functions Help Improve Measurement Efficiency

Motor, Inverter, Lighting, EV/HEV, Battery, Power Supply,

Aircraft, New Energy, Power Conditioner

(-3 dB, Typical)

*1: Excluding direct current input with the 50 A input element

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Product Features Functions/Displays Applications Software Comparisons Explanations Specifications

Measurement

5-fold wider than

previous model

2/3 of

previous model

InheritanceInheritance

5-fold wider than

previous model

First in industryFirst in industry

* Comparison with Yokogawa’s previous model WT1600

High-precision, wide-range, fast-sampling, simultaneous harmonic measurement

oltage and current frequency bandwidth 5 MHz (-3 dB, typical)

Faster switching frequencies increasingly require measurements in a wider range. The WT1800 provides a voltage and current frequency bandwidth (5

MHz) 5-fold wider than the previous measurement range and is capable of more correctly capturing fast switching signals.

Reduction of low power-factor error to 0.1% of apparent power (2/3 of previous model

A power-factor error is one of the important elements to ensure high-accuracy measurements even at a low power factor. The WT1800 has achieved a

power-factor error (0.1%) that is 2/3 of the previous model, in addition to a high basic power accuracy of ±0.1%

Wide voltage and current range allowing direct input

Direct input of measurement signals makes it possible to measure very small current that can hardly be measured with a current sensor. The WT1800

provides a direct input voltage range from 1.5 V to 1000 V (12 ranges) and a direct input current range from 10 mA to 5 A (9 ranges) or from 1 A to 50 A

6 ranges

.1 Hz low-speed signal power measurement and max. 50 ms high-speed data collectio

The frequency lower limit has been reduced to 0.1 Hz from the previous 0.5 Hz (5-fold lower than the previous model) to meet the requirement for power

measurements at a low speed. Furthermore, high-speed data collection at a data update rate of up to 50 ms has been inherited. In addition to normal measurement data, up to the 500th order harmonic data can be measured and saved simultaneously. The data update rate can be selected from nine

tions from 50 ms to 20 s.

Particular voltage and current range selectabl

Wide voltage and current input ranges have the advantage of extending the measurement application range. However, the downside is

hat the response time of the auto range tends to slow down. A range configuration function solves this problem. Since only the selected

range (effective measurement range) can be used, the range can be changed up or down more quickly.

armonic measurement at the 50 ms data update rate is poss

*1: Applicable to a general-purpose high-precision three-phase power analyzer as of February 2011 (according to Yokogawa’s survey

e up to the 100th order

For details, see

Pages

First in industryFirst in industry First in industryFirst in industry

z or

easuring

Challenging the common wisdom that

armonic measurement is limited to a

also capable of measuring up to the 500th

order harmonic even at high fundamental frequencies such as a 400 Hz frequen

For details, see Pages 5 and 6 For details, see Pages 5

Dual Harmonic Measurement

power to DC pow

xcess power, and battery chargers/dischargers

grid connection controllers to control reverse power flow

ist

Customize Display Screen

as 4-value, 8-value, and 16-value view to display screens, so y

creen to view the desired parameter in the desired size and at the desire

capable of read

viewing data in a flexible format. Thus the

isplay screen can be customized in a

e user-frien

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-to

not

Many features are available that are a first in the power measurement industry

DA output (/DA option)lDA output (/DA option)

Rear panel

Voltage input terminallVoltage input terminal

External current sensor

lExternal current sensor

input terminal (/EX option)

Direct current input terminallDirect current input terminal

Blue: Standard

Red: Option

Functions

First in industryFirst in industry

NEWNEW

New functions greatly support power measurements

Dual harmonic measurement (option)

The industry’s first two-line simultaneous harmonic measurement is available, in addition to simultaneous measurement of harmonic and

normal measurement items such as voltage, current, and power values. Previously, harmonic measurements of input and output signals had to be performed separately. With the WT1800, harmonic measurements of input and output can be performed simultaneously.

wo-channel external signal input is available for power measurement and analog signal data

easurement (option available in combination with the motor evaluation function

Power measurements can be performed together with physical quantity data such as solar irradiance or wind power in wind generation

Electrical angle measurement is also supported. Motor evaluation function allowing A-phase, B-phase,

and Z-phase inputs (option available in combination with external signal input

Pulse or analog signals can be input for rotation speed and torque signal measurements. The motor evaluation function of the WT1800

makes it possible to detect the rotation direction and measure the electrical angle, which is not possible with Yokogawa’s previous model

Saving/Communication

First in industryFirst in industry

List of Available Functions

Standard feature

Option

Software (sold separately)

User-defined event function

For the first time in the high-precision power analyzer industry, an event trigger function is available to meet the requirement to capture

only a particular event. For example, a trigger can be set for measured values that fall out of the power value range from 99 W to 101 W and only data that meets the trigger condition can be stored, printed, or saved to a USB memory device.

P-IB, Ethernet, and USB communication functions available as standar

The photograph shows the model with the /MTR option.

A wide variety of communication and data saving functions

First in industry means functions and capabilities available for the first time in the high-precision three-phase power analyzers (according to Yokogawa’s survey).

Voltage

range

1.5-1000V

Delta

Computation

External

Current

sensor

range

1-50A

0.05-10V

10mA-5A

Add-on

Frequency

12ch

/DT

/EX

Motor

Evaluation

Speed

Torque

/FQ

/MTR

Power

Frequency

range

1MHz

Auxiliary

Inputs

Analog

2 inputs

Voltage/Current

/US

Torque and rotation speed (A-, B-, and Z-phase terminals, /MTR option)

lTorque and rotation speed (A-, B-, and Z-phase terminals, /MTR option)

or external signal input (/AUX option)

Frequency

Inputs

bandwidth

1,2,3,

5MHz

(typical)

4,5,6

USB

Internal

memory

Memory

32MB

Basic Power

Accuracy

±0.1%

Printer

GP-IB interfacelGP-IB interface

Crest factor

300(6)

RGB

/B5 /V1

lBNC terminal for external clocklBNC terminal for external clock

BNC terminal for

lBNC terminal for

synchronized measurement

RGB output (/V1 option)lRGB output (/V1 option)

Ethernet communication interfacelEthernet communication interface

USB communication interfacelUSB communication interface

Update

Display

8.4-XGA

Comm

USB

rate

50ms-20s

Comm

GP-IB

Harmonic

Comm

Ethernet

sition

For details, see

Pages

For details, see

Pages

Harmonics

/G5

Software

WT Viewer

Pages

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5 and 6

4 and 8

/G6

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Functions/DisplaysFunctions/Displays

Eng

lish hel

Functions/Displays

All Data of 6-input, Single/Three-phase Devices can be Viewed on a

All Data of 6-input, Single/Three-phase Devices can be Viewed on a Single Screen

Single Screen Important Information is Displayed in a Concentrated Format on

Important Information is Displayed in a Concentrated Format on High Resolution 8.4-inch XGA Display

High Resolution 8.4-inch XGA Display

A high resolution display with a resolution about 2.6-fold higher than Yokogawa’s previous

model

is employed. More setting information and measurement data can be displayed.

* Comparison with Yokogawa’s previous model WT1600

A lot of information can be displayed on a single screen

easurement data can be displayed on a single screen, along with the respective detailed setting information of 6 inputs, such as a voltage range, current range,

ynchronization source, wiring system, and filter. You do not need to switch display screens frequently to confirm the settings

Data update rate changeable

Computation range display

irect display of primary current value

he setting ranges of voltage and current are

usually displayed with voltage and current signa

evels that are input to the power analyzer

he WT1800 provides not only this direct display ut also added a new computation range display

unction to the external current sensor range.

his function allows you to display the primar

current range for the voltage output type current

ensor. It allows you to intuitively set a range that

is suited to the primary measurement signal

eve

Display example of

omputation ran

Display example of

irect input range

Innovative

function

1800, the data update rate can be selected

rom 9 options from the fastest data update rate of 50 ms

to an update rate of 20 s for low-speed measurements.

or example, if you want to save the average data at a

-minute interval and inappropriately set the update rate

of 50 ms, measurement results may be not correct

ecause data can be saved only at a 1-minute interva

once every 20 times)

uch a risk can be avoided by setting the update rate that

s suited to the interval at which you want to save data.

User-defined event function

ture only a particular event

The data saving function of the WT Series is capable of continuously saving data for a lon period of time. However, to check an irregular event, data must be retrieved using spreadsheet

oftware. The event trigger function allows you to set the high and low limits and only trigger data that

alls into or out of that range to be saved.

Innovative

function

Individual null function

unction to reset only a particular input signal to zero

A null function allows you to reset the offset value to zero in the connected state. Previously, all inputs could only be collectively set to ON or

FF. With the WT1800, the null value for each

input can be set to ON, HOLD, or OFF.

n a motor evaluation test, the offset value for

only a particular input can be reset to zero. This

akes it possible to perform a more accurate

n test.

Innovative

function

Help function

Display the manual on the screen

p menu supports meas

New functionNew function

isplay the manual on the screen

requently used functions (keys) can be

ormed without the instruction manual.

ou may, however, want to use a new

unction during evaluation. The WT1800 incl functions, so if a new operation is required, you can read the explanation of the function

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Functions/Displays

Product Features Functions/Displays Applications Software Comparisons Explanations Specifications

Line filter

apture an original signal masked by high frequency component

Range configration function

new range configuration function is available. It allows you to select a articular voltage and current input range (effective measurement

. Eliminating unnecessary ranges has made it possible to achieve optimal range setting that is faster than Yokogawa’s previous model*. This allows more quicker tracking of signal changes.

the peak goes over the limit, you can switch to a preset range. This is

ffective in reducing the production time for a repeat test, such as setting to OFF, 100 V, OFF and so on, which is performed frequently on the production line.

re available as standar

High-speed range setting suited to input signals

Input signal changes

* Comparison with Yokogawa’s previous model WT1600

t from 1

Action of Yokogawa’ s previous model*

Change available ranges stepwise

Action of WT1800 range configration

Range change ends

Hz in

Change to selected next range

NEWNEW

Range change ends

A Wide Variety of Display Formats Ranging from Numerical to Custom Display

Numerical and harmonic bar graphs

l harmonic m

harmonic measurement option (/G5) makes it

oss

e to display both numerical data and bar

raphs to help understand measurement data

sua

n a

a dual harmonic measurement

unction (/G6) makes it possible to measure

ay two-line harmonic bar graphs (dua

armonic) simultaneously.

he /G5 or /G6 option is required

Dual vector

Simultaneous two vector display

amental harmonic voltage and current

ignal phase vectors can be displayed. With

okogawa’s previous model, vector display is

to a single line. With the WT1800, Dua

ectors can be displayed.

n addition, combination display of vectors and

umerical values is also poss ou to view the numerical parameters and oltage and current phase status visually.

he /G5 or /G6 option is require

NEWNEW

s allows

Waveform

ort for 6 split screen displays

Trend

Capture efficiency changes visually

NEWNEWNEWNEW

resolution display makes is poss

lit the waveform display into up to 6 split creens. This makes it possible to split the isplay of signals between the input and output

a three-phase inverter and display them

imultaneously.

aveform display allows you to display

waveforms for the voltage alone or the current

lone, or arbitrarily set the display position, so

you can also display only the signals you want

o compare one above the other.

hen evaluating inverter efficiency, sometimes

mall efficiency changes can hardly be

recognized with just numerical values

rend display makes it poss m efficiency as trend data in time series to help capture even small changes visually. Trend data

nt val

ver several minutes or several days can be isplayed.

Trend display can be saved with the screen hardcopy function. To save numerical data, a store function is used.

e to display

e to

Setting information

ombination display of Information and Numerical screens

Custom

NEWNEWNEWNEW

Customize display screen

he screen can be split into two, with one bove the other, and two types of screens can e displayed simultaneously. Screen can be elected from Numerical, Waveform, Trend, Bar raph, and Vector displays. nother new function allows you to press the

NFO button on the Numerical screen to display

he setting information in the upper row and

utomatically scale down the numerical

nformation displayed in the lower row.

mage data can be loaded onto the screen an

he position and size of the numerical data can

e specified

e display screen can be customized so that

he corporate logo of your company is displayed

n the screen, or only the measurement items ou want to view, such as input and output

iciency or frequency, are displayed one above

he other.

The data for the created screen n

B storage device.

ApplicationsApplications

*Also refer to the features of other applications

Inveertrt

* With th

InInInpupu

M indi

Motor

Load

)

Applications

Converter section

KeywordKeyword

Keyword

Input/Output Efficiency Measurements of Inverters,

Input/Output Efficiency Measurements of Inverters, Matrix Converters, Motors, Fans, and Pumps

Matrix Converters, Motors, Fans, and Pumps

Torque

Inverter section

rotation

sens

rive circuit

onvert AC to DC signals

1 2

ree-phase input, power is

easured with the three-phase three-wire system

Overview

The WT1800 is capable of performing up to 6 power input measurements to make it possible to perform an inverter efficiency test between the input and output in inverter evaluation. In addition, a motor evaluation function (option) makes it possible to simultaneously monitor voltage, current, and power changes, as well as rotation speed and torque changes

Modulate DC signal and convert to any AC signal

3 4 5 6

* In this example, measurement is performed with the three-phase three-wire system (at 3V3A) to verify the (inter-phase)

oltage and current of each phase.

indicates measurement points and input to the power analyzer.

cates connecting the motor output to the

motor signal input (/MTR) of the power analyzer

Advantages of WT1800

n 5 MHz range and 2 MS/s high-speed sampling n Up to the 500th order harmonic measurement

The vertical resolution in power measurements is one of the important elements for high-precision measurements. The WT1800 is capable of 16-bit high resolution and approximately 2 MHz sampling to make it possible to measure faster signals with higher precision.

Voltage/

current range

5 MHz

Approx.

2 MS/s 16-bit

(/G5 and /G6 options)

Yokogawa’s previous model* provides two different measurement modes, called Normal and Harmonic, and each of the measurements is performed separately. The WT1800 makes it possible to simultaneously measure voltage, current fundamental wave, harmonic components, and harmonic distortion factor (THD) in the Harmonic measurement mode, along with the conventional voltage and current RMS values in the Normal measurement mode. You do not need to switch modes and can measure all data at high speed. In addition, up to the 500th order harmonic can be measured for fundamental frequencies.

Simultaneous

harmonic

Up to the

500th order

*Comparison with Yokogawa’s previous model WT1600

n Boost converter efficiency and inverter efficiency evaluation

To evaluate the inputs and outputs of inverters including boost converters, at least 5 power measurement inputs are required. The WT1800 provides 6 inputs to make it possible to evaluate all aspects of inverters. In addition, a new individual null function makes it possible to set the DC offset only on a particular input channel as the null value. This makes it possible to perform more accurate measurements.

6-input6-input

Efficiency

measurement

Individual

null function

n Dual harmonic measurement (/G6 option)

In previous models, harmonic measurement has been limited to a single line. The WT1800 is capable of performing two-line simultaneous harmonic measurements with one unit for the first time in the industry. The ability to simultaneously measure harmonics for the input and output signals not only reduces the switching time but also makes it possible to perform simultaneous data analysis for the input and output, which has not been possible with the previous models.

The following measurements can be performed for up to the 500th order Single harmonic measurement (/G5 option) Dual harmonic measurement (/G6 option)

Dual harmonic

measurement

Simultaneous

input/output

measurement

Up to the

500th order

ApplicationsApplications

Also refer to the features of other applications

Applications

Product Features Functions/Displays Applications Software Comparisons Explanations Specifications

n Delta computation function (/DT option) n Electrical angle/rotation direction measurements

Differential

voltage/current

Star-delta

conversion

Delta-star

conversion

T-phase S-phase

Figure 1 Line voltage/phase current

Typical Product Configuration

Direct input measurements at less than 50 A: WT1806-06-D-HE/B5/G6/DT/V1/MTR 6 power inputs, current measurement range 10 mA to 55 A, built-in printer, dual harmonic, delta computation, RGB output, motor evaluation function Measurements at more than 50 A using a current sensor: WT1806-60-D-HE/B5/G6/DT/V1/MTR 6 power inputs, current measurement range 100 μA to 5.5 A (measure AC/DC current sensor output), built-in printer, dual harmonic, delta computation, RGB output, motor evaluation function

It is possible to obtain the differential voltage, line voltage, phase voltage, etc. by obtaining the sums and differences of instantaneous measurement values of voltage and current in each element.

Differential voltage/current: Differential voltage and current between two elements are computed in the three-phase three-wire system.

lLine voltage/phase current: Line voltage and phase current that

are not measured are computed in the three-phase three-wire system (Figure 1).

lStar-delta conversion: Line voltage is computed from the phase

voltage using the three-phase four-wire system data. Delta-star conversion: Phase voltage is computed from the line voltage in the three-phase three-wire system (3V3A system) (Figure 2).

R-phase

Phase current

Computed value

Line voltage

*For detailed specifications, see the page on the specifications. You need to provide a cable for voltage measurements when wiring.

T-phase S-phase

R-phase

Phase

voltage

Phase

voltage

Figure 2 Delta-star conversion

Phase

voltage

Computed value

of motors

Electrical angle*Electrical angle*

A-, B-, and

Analog/pulse

DL850 ScopeCorder

*1: Detailed switching waveforms of inverters cannot

be viewed with the WT1800. If you need to verify the waveforms, you can use the DL850 ScopeCorder, which is capable of 100 MS/s, 12-bit isolated input. For details, please see Yokogawa’s website or catalog (Bulletin DL850-00EN).

(/G5 and /G6 options) (/MTR option)

A motor evaluation function makes it possible to measure the rotation speed, torque, and output (mechanical power) of motors from rotation sensor and torque meter signals. The input signal from the rotation sensor and torque meter can be selected from analog signal or pulse signal.

Z-phases

inputs

Furthermore, A-phase, B-phase, and Z-phase input terminals have been newly added. The A-phase and B-phase make it possible to detect the rotation direction of motors. In addition, electrical angle* can be measured using Z-phase signals.

* Electrical angle measurements require the /G5 or /G6 option. * Please purchase a torque sensor and rotation sensor separately. Pulse/analog inputs are available for the motor evaluation function of the WT1800.

Support for Performance Testing of

Multiple Home Appliances

1 to 6 home appliance

o perform high precision power evaluation on the production line, a single WT1800 unit does the work for up to six single-phase power analyzers to

Overview

measure voltage, current, power, frequency, power factor, and harmonic distortion factor*. Also an independent integration function is available for each input element to start and stop integration. Since data can be collected remotely by communicating with just a single WT1800 unit, it is easy to create programs.

Advantages of WT1800

n Standby and operation power measurements of up to six devices with a single unit

Power measurements of up to six devices can be performed with a single unit. In standby power measurement, 1 mA or less measurement is supported since measurements can be performed from an effective input of 1% of the small current range in the rated 10 mA range. Also, an average active power function allows you to calculate the mean power* by intermittent oscillation control signals.

*User-defined computation is used.

Standby powerStandby power

1 2 3 4 5 6

All-channel

frequency

measurement*

*The /G5 or /G6 option is required for the harmonic distortion factor measurement. Also, the /FQ option is required to measure four or more frequencies.

n Combined use with ScopeCorder for analog output

(/DA option)

A D/A output connector on the rear panel allows you to convert a

20-channel

output

16-bit resolution

DA zoomDA zoom

measurement value to ±5 V (rated value), 16-bit high resolution DC voltage value and output it. Up to 20 items can be output simultaneously. Also, the ability to set the upper and lower limits for an arbitrary range of input signals and scale up and down the D/A output in the range from -5 V to +5 V allows you to enlarge a changing part of the input signals to monitor it with a ScopeCorder, etc.

* 0 to 5 V is fixed for some items, such as frequency measurement.

Average

active power

Typical Product Configuration

WT1806-06-M-HE/EX6/B5/G6/FQ/V1/DA: 6 power inputs, current measurement range 10 mA to 55 A, or clamp measurement (with a clamp input terminal), built-in printer, all-channel frequency measurement (×12), RGB output, dual harmonic, DA output

*For detailed specifications, see the page on the specifications. You need to provide a cable for voltage measurements when wiring.

*An external input terminal (EX) allows you to perform both direct input measurement and clamp measurement. *Direct input and current sensor input cannot be connected Simultaneously.

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