Digital Power Meter
WT
DIGITAL POWER METER
300 Series
THE 5TH GENERATION OF THE WORLD'S
BEST SELLING POWER METER
High Performance and Reliability
Basic Accuracy of 0.1% of Reading
Low Current Measurement down to 50 micro-Amps
DC, 0.5 Hz to 100 kHz Frequency Range
Standard USB, and GPIB or RS232 Interfaces
Bulletin WT300-01EN
Yokogawa’s new compact WT300 series for reliable power measurement
The WT300 series is the 5th generation of
Yokogawa’s compact power meter portfolio.
The world’ s best selling power meter is the
power meter of choice in multiple industries
from production lines to R&D applications.
WT310HC(1ch, MAX40A) WT332(2ch)/WT333(3ch)WT310(1ch)
Wide current input range with high performance and reliability PC, Data Logger and External Sensors connectivity
Key Features Applications Software & Tool Specification
Wide current input ranges
The WT300 series offers customers a wide range of current inputs from a
few mA right up to 40Arms.
It can measure both AC and DC.
Current range by model
WT332 WT333
WT310
WT310HC
50uA
5mA 10mA 20A 26A 40A
Ranges
15.000 to 600.00V
0.5000A to 20.000A
5.0000mA to 20.000A
1.0000A to 40.000A
DC to 100kHz, 20A
DC to 100kHz, 20A
DC to 20kHz, 40A
Fast display and data update rate
The fast display and 100ms maximum data update rate of the WT300 series
offers customers a short tact time in their testing procedures.
Consistent Basic Measurement Accuracy for all input ranges.
0.1% of reading + 0.1% of range (50Hz/60Hz)
Simultaneous measurement of all parameters
A WT300 series can measure all DC and AC parameters. It can also measure
harmonics and perform integration simultaneously without changing the
measurement mode. The WTViewerFreePlus software is used to monitor and
save all these parameters.
Example of WTViewerFreePlus display
Convenient measurement functions
- MAX hold function
The maximum values of RMS/PEAK voltage & current active power, reactive
power and apparent power can be held.
- Line filter and frequency filter capability
These filter functions will cut off unnecessary noise & harmonic
components for fundamental waveform measurements.
The WT300 series offers a wide range of communication interfaces such as USB, GP-IB or RS-232 (Selectable) and
Ethernet (Optional).
Customers therefore have the flexibility to choose
according to their application needs e.g. from
production lines to engineering test benches.
Customers can use WTViewerFreePlus software to
set up all kinds of measurements. Additionally, the
numeric values, waveform display* and trend
graphs of the measurement data can be displayed
and saved.
* Waveform display requires the /G5 Harmonic option
D/A output for measurement recording
The D/A option is used to output Voltage,
Current, Power and other measured data
for recording to data loggers (+/-5Vdc
outputs).
(WT310/WT310HC 4CH, WT332/WT333
12CH)
Test bench Air conditioner evaluation Production line test system
Current sensor input
Customers have the option to
select either 2.5V to 10V
range (/EX1 option) or 50mV
to 2V range (/EX2 option)
inputs for measuring large
currents using current
clamps or current sensors
with voltage outputs.
Motor’s Megawatts
External input for current
sensor
First in Class* and First in Industry*
First in class : Auto ranging function available in selected ranges
The auto-range function is used to select/change the range automatically in specific ranges.
This results in shorter range changing times and thus quicker and more efficient testing.
Image of Range skip (configuration) function operation
02
Input signal changes
Action of Yokogawa’s previous model
Range
Change available ranges stepwise
Action of WT310/WT330 series
Range change ends
* According to YOKOGAWA survey by Dec, 2012
change ends
Change to selected
next range
First in industry : Integration measurement auto ranging function
Conventionally, when power meters operate in an integration mode to measure power consumption and standby power, the measuring ranges need to be fixed.
However, if the level of the input exceeds the maximum of the selected range, the results will be incorrect and the test will need to be repeated with higher ranges
applied.
The WT300 series has a high speed automatic ranging capability in integration mode which removes this need to repeat the test and integration is continuous and
accurate.
This function is not only available for +/- Wh but also for Ah and DC current.
03
WT300 power meters are easy to use, cost effective and accurate for
a wide range of applications in Production, Testing, Evaluation and R&D.
For Home appliances and Office equipment For Industrial equipment and Transportation
Production line or QA testing of
electric Devices
- Compact half rack mount size helps customers build smaller
test systems with a better Return on Investment (ROI).
- D/A output function for data recording
- Multiple communication interfaces. USB, RS-232 or GP-IB and
Ethernet capability.
The simultaneous measurement of power consumption parameters such as
U, I, P, frequency, Power Factor and Harmonics for production line or QA
testing results in reduced tact times. Thus testing is faster and cheaper. The
DA output and communication interfaces enable data to be remotely and
flexibly captured.
system
Development and evaluation tool for
home appliances
- 5mA range helps small current measurement (WT310)
- Auto ranging function under Integration mode
- Range skip (range configuration) function provides the ability
to select the usable ranges in advance. Auto ranging enables
the WT300 series to rapidly adapt to changing input
conditions.
The range skip function reduces the range change transition period. The
WT310 can measure both large and small currents accurately in a single test.
This can reduce the total evaluation period or removes the need to use two
rather than one power meters for the application, thereby saving capital cost.
Image of
range configuration function
for WT300 series
Input signal changes
* Comparison with Yokogawa’s previous model WT210/WT230
Action of Yokogawa’ s previous model*
Range
Change available ranges stepwise
Action of WT310/WT330 series range configration
Range change ends
change ends
Change to selected
next range
Automotive - Battery or DC driven
device evaluation
- Accurate DC measurement: 0.3% total (WT310HC: 0.5% total)
- Direct high current measurement up to 40A without any
external current sensor (WT310HC).
- Charge/Discharge (+/-Wh, +/-Ah) energy measurement for
batteries
The WT310HC can measure currents up to 40A directly.
This provides a cost effective and accurate method for testing DC driven
devices in vehicles without having to use extra sensors.
Navigation device
Audio Visual device for vehicle
Duration testing and efficiency
measurement for industrial motors
and rotating machinery
- Integration measurement for long period
- D/A output function for data recording
- DC, 0.5Hz to 100kHz broad bandwidth capability
The WT300 series provides reliable current integration (Ah) and Energy (Wh)
measurement for up to 10,000 hours (approx. 1 year). The D/A option is used
to save and monitor the measurement results (WT310/WT310HC: 4ch,
WT332/WT333: 12ch). An external recorder or data logger like, a ScopeCorder,
can be used to save this D/A function data along with other parameters such
as temperatures, torque and rotation speed.
Voltage
Motor’s Megawatts
Key Features Applications Software & Tool Specification
External input for
current sensor
Testing to international standards,
such as IEC62301,
Energy Star and SPECpower
- The WT310 has a high measurement resolution of Max.
100µW under the 5mA range setting.
- Simultaneous measurement of normal power parameters,
harmonic components and THD.
- Dynamic input capability of crest factor Max 300 (Peak value
/ minimum effective RMS value)
- Free PCM software for IEC62301 testing
The WT310 together with the power consumption measurement (PCM)
software enables users to perform standby power testing according to
international standard.
WTViewerFreePlus
PCM software
DUT
Evaluation of large current equipment
such as Induction Heaters/Cookers
- Direct high current measurement up to 40Arms without using
external current sensors (WT310HC).
- Auto ranging function for Integration mode
The WT310HC allows 40Arms to be directly inputted without the requirement to
use current clamps or current sensors. This not only provides more precise
measurement but also saves on investment costs. The wide current ranges are
from 1A to 40A and voltage ranges are from 15 V to 600 V.
Customers can use it for the evaluation of special waveform driven devices
such as IH cookers and heaters.
Single Phase voltage
IH Cooking Heater
Evaluation testing of special waveform
driven devices and distorted
waveforms (including DC component)
- DC, 0.5Hz to 100kHz broad bandwidth capability
- Average active power measurement under integration mode
The WT300 series has a broad frequency capability of DC and from 0.5Hz to
100kHz. It can measure the RMS value of distorted waveforms like square
waveforms or special waveform driven devices. The average active power
measurement function gives accurate power consumption data for fluctuating
power devices such as burst waveform operated devices. Therefore the
customer can perform accurate distorted waveform measurements without
using special mode settings.
UI
tt
Burst Waveform Square Waveform
Conformance and evaluation testing
of uninterruptable power supplies
(UPS)
- Maximum order setting for THD calculations
- Efficiency measurements using a single power meter
- Average active power measurement under integration Mode
The WT300 series enables users to conduct conformity tests according to UPS
performance testing standards. The WT300 series is used to measure and
calculate input & output levels, the efficiency, frequency and THD. The average
active power data also provides accurate values of power consumption. The
WT300 series along with the WTViewerFreePlus software helps to
simultaneously measure all the necessary parameters required to test a UPS
thereby reducing the evaluation time.
UPS
WTViewerFreePlus : PC Software
Please visit the URL below which shows many applications and examples. It will be regularly updated with the latest applications.
04
http://tmi.yokogawa.com/technical-library/application-notes/
05
Loading...