ENERGY SAVING TOOLS
Digital Sampling Power Meters
with Superior Cost Performance
Digital Power Meters
WT210
● Basic power accuracy: 0.1% ● DC measurement, 0.5 Hz to 100 kHz power frequency range
● Compact design (half-rack size)
● 5 mA range for very low current measurements (model WT210 only)
● Line filter function ● High-speed data update (as fast as 10 readings per second)
● Harmonic measurement function available
● User calibration capability
/
WT230
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Bulletin 7604-00E
The WT230’s advanced specifications and its wide range of functions let you handle all your measurement applications from low-frequency
equipment to high frequency inverters using a single power meter.
One unit also handles standby low-power measurements and rated-power measurements
(functions available with the WT210 only).
WT230 WT210
●
Wide range of 5 mA to 20 A
The built-in 5 mA range lets you measure currents as low as 25 µA. This makes it possible to measure very
low currents on such things as intermittent control equipment. The wide current range (5 mA to 20 A) means a
single power meter can be used for applications such as Energy Star® measuremnts, to measure everything
from standby-power to rated-power.
Fr ee
Soft ware Soft ware
WTViewer for the WT210/WT230
Easily Acquire and Manage Power
Measurement Data from Your PC
See 8 pages or
Bulletin 7604- 32E for details.
NEW
Functions and Features of the WT210 and WT230
●
A Wide Frequency Range Lets You Work on a Variety of Different Applications
Low-frequency Equipment Commercial Power Supplies
NEW
NEW
Low-frequency measurements starting at 0.5 Hz
Low-frequency measurements starting at 0.5
Hz can be used with evaluations of
cycloconverter and when a motor are started.
●
Accuracy Is Assured between 1% and 130%
960 01 751552
NEW
NEW
Power accuracy is even better than in former WT
series.
0.1%
1: Maximum display is 140% of the rated input.
2: Conditions apply to accuracy from 110% to 130%.
NEW
NEW
Now you can obtain more precise
measurements on high-frequency equipment
such as inverters.
With 960 01 ➞ Max. 400 Arms
With 751552 ➞ Max. 1000 Arms
●
Capture a Variety of Signal Types
Surge current and maximum load state
NEW
MAX hold function for voltage, current, and power
This function lets you keep, on the display, voltage and current peak
values, voltage and current rms values, and maximum values for active
power, apparent power, and reactive power.
3
NEW
Quick response with display updating as fast as every 0.1 second
With measurement intervals as short as 0.1 second, you can capture
transient phenomena with a fine level of detail. You can also reduce the
time per measurement for increased through put in production testing.
Half-wave Rectification, Intermittent Control, Distortion Waves
NEW
Measurement of DC components
In addition to using DC inputs, you can obtain precise measurements of
signals containing DC components, such as intermittent signals and halfwave rectification signals.
Instead of taking notes, you can use the internal memory to store and recall
settings and field measurement data.
Information on the features and functions of Yokogawa's WT210, WT230, accessories, and related products is also available at our web site. http://www.yokogawa.com/tm/
NEW
This function lets you measure fundamental wave rms values for inverter
output voltages.
Constantly changing signals
Noisy Signals
Line filter function (fc = 500 Hz)
Inverters
100 kHz power frequency range
130% input1% input
26A
●
Powerful Tools for Energy Measurement
Extended Energy Measurement Applications
Maximum integration time: 10,000 hours
Time can be set between 1 second and 10,000 hours (416 days) in 1second increments.
3
Battery equipment applications
Integrating power measurement by polarity
Power and current values can be integrated separately for positive and
negative polarities. Integrated values are shown with the decimal point
12
moving according to the integrated value.
●
Applications for a Variety of Add-on Options
Large-current Measurement Using Current Clamps
External input for current sensor
Select either 50/100/200 mV or 2.5/5/10 V.
A current clamp lets you measure currents
without needing to disconnect the power supply
circuit wiring.
4: Please select /EX1 (2.5/
5/10 V) option when you
use 960 01.
4
Online Power Meter Control and Recording
GP-IB/serial (RS-232-C) interface
This option lets you control the power
meter through a PC, or save data to a
PC.
GP-IB/serial interface (RS-232-C)
Clamp
probe
External
input
D/A output
Recording to a Recorder
D/A output
This option lets you output a variety of measurement
data, such as voltage, current, and power measurements,
with ±5 V rating, for recording on a recorder. The recorder
can then be used to check changes in data over time.
Recorder
Intermittent Control Equipment Applications
Average active power display
The power of intermittent control
equipment changes significantly
over time. The average active power
in intermittent operations can be
displayed, which is highly effective
for consumed-power
measurements.
Average active power (W) =
Integrated power (Wh)
Integrated elapsed time (Hours)
3
Instantaneous power
Power
Average power
Time
Power Supply Harmonic Measurements
Calculate voltage, current, reactive power,
content ratio, and phase angle relative to
fundamental frequency for up to 50 orders. This
option is well-suited to power supply environment
evaluations. Measurement time is approximately
90% shorter than in former models.
Comparator output
GO/NO-GO Evaluations on Testing Lines
4-channel comparator function
A 4-channel relay contact output (normal-open and normal-close pair) lets
you do GO/NO-GO evaluations on production and testing lines.
3: Popular functions on the WT200 were incorporated into WT210 and WT230.
32
Basic Characteristics
Example of Frequency-power Accuracy Characteristics
10
WT230 15 V/1 A range
5
0
Tolerance (% of range)
-5
-10
0.1 1 10 100 1000 10000 100000
Spec and reference values
Frequency (Hz)
Example of WT210 Current Accuracy
10
8
6
4
2
0
-2
-4
-6
-8
Indicated value tolerance (% of reading)
-10
0.1 1 10 100
Input level relative to set range (% of range)
100 mA range: 60 Hz input
Current Input Surge Withstanding Ability Example of Influence of Common Mode Voltage
350
300
250
200
150
100
Surge current value (Arms)
50
0
0.01 0.1 1 10 100
5 mA-20 mA range
0.5 A-20 A range
Input current time width (seconds)
5
4
3
2
1
Tolerance (% of range)
0
-1
0.1 1 10 100 1000 10000 100000
WT230 150 V range
WT230 500 mA range
Spec and reference values
Frequency (Hz)
Example of D/A Output Response Comparison with Former Models
WT200/WT130 WT210/WT230
0.25% of rng 0.2% of rng
0.35% of rng (WT130)
5 digits (WT200)
Approximately 3 seconds 0.25/0.5/1/2/5 seconds
EXT STOP, EXT RESET, and INTEG BUSY are not added.
No Yes (need /HRM)
Yes No
4 digits 5 digits
All six signals listed to the left are added.
display update time
Voltage input terminal Binding post Plug-in terminal (safety terminal)
External input terminal Plug-in terminal (safety terminal) BNC
Voltage and current
basic accuracy
Power basic accuracy 0.3% of rng (WT200)
Frequency range DC, 10 Hz to 20 kHz DC, 0.5 Hz to 100 kHz
Assured accuracy range 10% to 130% of range rating 1% to 130% of range rating
Display updating interval 0.25 second (fixed) 0.1/0.25/0.5/1/2/5 seconds
V, A, W display digits 4 digits (WT130)
Line filter function No Yes (fc = 500 Hz)
Frequency filter function Yes (fc = 300 Hz) Yes (fc = 500 Hz)
Key lock No Yes
Harmonic measurement display
updating interval
Remote signals when EXT HOLD and EXT TRIG are added. EXT START,
comparator is installed
Online data format ASCII ASCII, binary
Waveform data communications output
Addressable mode B for
GP-IB communications
Display digits (factory default) 4 digits 5 digits
Online output data digits (factory default)
Functions Included with the WT200 (but Not Included with the WT130) and Included with the WT210/WT230
•
MAX hold function
•
•
10,000-hour maximum integration time • Integration with few data omissions • Average active power display
Moving decimal point display based on integrated power value
0.2% of rng
5 digits
Pin assign is changed.
4
WT230 WT2 10
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