WT3000 PRECISION POWER ANALYZER
The WT3000 is the ideal measurement solution for applications such as product efficiency testing, engineering, R&D work on inverters, motor drives, lighting systems and electronic ballasts, UPS systems, aircraft power systems, transformer testing and other power conversion devices.
With basic power accuracy of ±0.02% reading, DC and 0.1 Hz-1 MHz measurement bandwidths, and up to four input elements, the WT3000 provides higher-accuracy measurement of I/O efficiency.
- Basic accuracy: 0.01% of reading
- Basic power accuracy: 0.02% of reading
- 2A current input element
- Good readability: The large, 8.4-inch LCD and the range indicator LEDs
- Simultaneous measurement with 2 units (8 power input elements)
- Store function: 50 ms data storing interval
- Interface: GP-IB, Ethernet, RS-232 and USB
- Advanced computation function: Waveform computation, FFT analysis, waveform sampling data saving.
- IEC61000-3-2 and IEC61000-3-12: Harmonic measurement
- IEC61000-3-3 and IEC61000-3-11: Voltage fluctuation / flicker measurement
- IEC61000-4-15 Ed2.0 (Support Flicker meter standard) Update!
More Precise. More Bandwidth. More Features.
- The WT3000 is a truly innovative measurement solution, combining top-level measurement accuracy with special functions.*
- The large, 8.4-inch liquid crystal display and the range indicator LEDs ensure good readability and make the system easy to use.
Have you had problems or questions such as these?
- When working with efficiency-improvement evaluation data for a high-efficiency motor, improvements cannot be seen unless measurements are taken with very high precision.
- Measurement efficiency is poor during power measurements and power supply quality measurements.
- You measure voltage using mean values out of habit, and are wondering if that is really the best approach.
Better Efficiency in Power Measurements
In developing the WT3000, Yokogawa focused on improving efficiency in two basic areas. One goal was to obtain highly precise and simultaneously measurements of the power conversion efficiency of a piece of equipment. The other objective was to improve equipment evaluation efficiency by making simultaneous power evaluations and tests easier and faster.
New Innovations to Enhance the Reliable Measurement Technology;The Yokogawa WT2000 was very popular with users and considered highly reliable because of its high precision and excellent stability. The WT3000 is based on a measurement system which combines the measurement technology used in the WT2000 as well as other WT Series models. With the WT3000, we made further improvements to the basic performance specifications for even better functionality and reliability. We are confident users will appreciate these improvements to power and efficiency measurements thanks to the new power control technologies we have introduced.
A Variety of External Interface Choices
The WT3000 is the first model in the WT Series which is standard- equipped with a PC card slot (ATA flash card slot). This interface allows data to be saved quickly, so data processing time is reduced. The WT3000 is also standard-equipped with a GP-IB port. In addition, a serial (RS-232) port, Ethernet port, and USB port are available as options. The variety of interface choices allows customers to use the best interfaces for a wide variety of equipment, media, and network environments.
Yokogawa's highest-precision power analyzer *1
The WT3000 has the highest precision of all the Yokogawa power analyzers in the WT series. The models in the WT series are designed to meet a wide variety of user needs. The WT300 series is a high price-performance series which is very popular in production line applications. The WT1800 allows measurement data to be viewed in a variety of ways, including numerical value display, waveform display, and trend display capabilities.
*1 As compared to Yokogawa's products
*2 Reading error
Select the model most suited to your measurement needs
High accuracy and wide frequency range
Basic power accuracy
±(0.02% of reading + 0.04% of range)
DC, 0.1 Hz to 1 MHz
Low power factor error
Power factor error when cosø=0
0.03% of S
S is reading value of apparent power
ø is phase angle between voltage and current
0.5/1/2/5/10/20/30 [A] or 5/10/20/50/100/200/500 [mA], 1/2 [A]
*Models with input elements supporting current output type current sensors are planned for release
* Voltage range and current range are for crest factor 3
- 1000 [Vrms] Continuous maximum common mode voltage (50/60 Hz)
- Data Update rate: 50 ms to 20 sec
- Effective input range: 1% to 130%
- Simultaneously measurement with 2 Units
- Standard PC card slot
|Standard Features||Optional Features|
Example of basic characteristics showing the WT3000’s high precision and excellent stability
Supports Crest Factor 6
|The crest factor is the ratio of the waveform
peak value and the RMS value.
* However, the peak value of the measured signal must be less than or equal to the continuous maximum allowed input
* The crest factor on a power meter is specified by how many times peak input value is allowed relative to rated input value. Even if some measured signals exist whose crest factors are larger than the specifications of the instrument (the crest factor standard at the rated input), you can measure signals having crest factors larger than the specifications by setting a measurement range that is large relative to the measured signal. For example, even if you set CF = 3, CF5 or higher measurements are possible as long as the measured value (RMS) is 60% or less than the measuring range. Also, for a setting of CF = 3, measurements of CF = 300 are possible with the minimum effective input (1% of measuring range).
Store Function (Comes Standard with WT3000)
Voltage, current, power, and other measured data can be stored to the unit's approximately thirty megabytes of internal memory. These data can be saved in binary or ASCII format on a PC card or USB memory*.
* The USB port (for peripherals) comes with the /C5 option.
Each measured item can be stored every data update interval. You can specify to store only the desired measured items, thus saving memory.
Files saved in ASCII format can be opened in general-purpose applications such as Excel allowing display of data in graphs.
* Please note that data saved in binary format can only be manipulated using dedicated software to be made available by Yokogawa.
WT3000 controls: simple to use, easy to viewThe WT3000 was designed with user-friendly functions and controls in response to user requests for a simpler range setting operation and more user-friendly parameter setting display process
- Range settings using direct key input
- Intuitive control using cursor keys
- Using item pages to set display preferences
- A Variety of display formats
- 50ms data; updating intervals; compensation functions
- A variety of integration funcitons: User-defined function, Efficiency Calculation Function.
Range settings using direct key input
Simpler range settings
|The range indicator on the WT3000 is a seven-segment green LED, so the set range can be monitored at all times. The range can easily be switched using the up and down arrows.|
Intuitive control using cursor keys
|Easier cursor navigation and numerical settings
Cursor keys can be used to move the screen cursor in four different directions, so it is easy and intuitive to set scaling factor and other settings.
Using item pages to set display preferences
Item pages make it easy to set the data you want to view for each experiment
The WT3000 has nine item pages for displaying measurement values. Once you set the measurement parameters you want displayed on a particular item page, you can easily switch between entire groups of displayed parameters. For example, the following settings make it easy to switch and compare data:
Page 1: Voltage, current, active power, and current frequency for input element 1
Page 2: Voltage, current, active power, and current frequency for input element 2
Page 3: Voltages for input elements 1, 2, 3, and 4
Page 4: Currents for input elements 1, 2, 3, and 4
Page 5: Power for input elements 1, 2, 3, and 4
A Variety of display formats
Formats for viewing waveforms as well as numerical values
|The WT3000 lets you display input signal waveforms in addition to numerical value data. This means you don't need to connect a special waveform analyzer just to check signal waveforms. 1
In addition, the optional advanced calculation function lets you display vectors and bar graphs for enhanced visual presentation. The information display shows voltage range, current range, filter, and scaling value all together, making it easy to check your settings.
1 Waveforms up to approximately 10 kHz can be displayed accurately.
2 760302, 760303 and 760304 model. Requires the optional advanced calculation function (/G6)
50ms data updating intervalsHigh-speed measurement to capture rapid data fluctuations
Fast updating allows you to precisely capture rapidly changing transient states in the measurement subject.
* The WT3000 switches between two different calculation systems depending on the data updating interval. See page other for details.
For increased measurement precision
The WT3000 has compensation functions for high-precision measurements. These functions can compensate for instrument-related losses resulting from the power meter’s internal impedance as well as losses related to wiring during measurement with two power meters. The following compensation functions are provided to compensate for instrument-related losses:
- Efficiency compensation: This function compensates for instrument-related losses occurring during efficiency calculation.
- Wiring compensation: This function compensates for instrument-related losses caused by wiring.
When measurements are performed using two power meters with three-phase three-wire wiring, errors may occur if current flows to the middle wire (or if there is a leakage current). The WT3000 has a function to compensate for such errors. Even when measurements are performed with two power meters (requires measurement with three-phase three-wire (3V3A) wiring), the current flowing to the middle wire is calculated, and a corresponding correction value can be added to the power measurement (requires /DT option). This improves the accuracy of power measurements.
A way to add user-defined measurement parameters
As many as twenty user-defined formulas can be set in the WT3000. These equations can be used to calculate various parameters, such as mean active power (see "A variety of integration functions" below).
Efficiency calculation function
An easier way to input efficiency calculation formulas
This function can be used to set up to four efficiency calculation formulas.
A Variety of integration functions
Apparent power integration and reactive power integration
- Active power, current, apparent power, reactive power
In addition to the active power integration function (WP) and current integration function (q) included in earlier models, the WT3000 also has a new apparent power integration function (WS) and reactive power integration function (WQ).
- A wide effective input range for high-precision integration
The WT3000 has a wide effective input range, from 1% to 130% of the measurement range. This enables higher-precision integration measurements on measurement subjects with current values that fluctuate widely from large currents down to faint currents in the standby state.
- Mean active power (using user-defined settings)
Mean active power can be calculated over an integration interval. This feature is useful for evaluating the power consumed by intermittent-control instruments in which the power value fluctuates.
When you purchase a WT3000 from Yokogawa, you get to select just the options you need. This approach lets you maximize performance at a lower cost.
Advanced Calculation Function (/G6 option)
The Advanced Calculation Function (/G6 option) provides for wide bandwidth harmonic measurement, IEC compliant harmonic measurement (requires harmonic measurement software), FFT calculation, waveform calculation functions, and saving of waveform sampling data.
Wide Bandwidth Harmonic Measurement Mode
Harmonic measurement for a frequency range of 0.1 Hz – 2.6 kHz
*1 0.1–10 Hz using an external sampling clock.
*2 Harmonic measurement of up to the 20th order possible in the 1 kHz to 2.6 kHz range.
Harmonic Measurement Function
Same as harmonic Measurement Function /G5
IEC Harmonic Measurement Mode
Can perform tests conforming to international standards.
* These modes cannot be used at the same time.
FFT Calculation Mode
More detailed frequency analysis than with the harmonic measurement mode.
Waveform Calculation Mode
Monitoring of instantaneous power waveforms.
Waveform Sampling Data Saving Function
Saving of detailed waveform data for confirmation.
Delta Calculation (/DT)
Checking phase voltage when you measure line to line voltage
|This function allows you to calculate individual phase voltages from the line voltage measured in a threephase, three-wire (3V3A) system. R-S line voltage can be calculated in systems measured from a three-phase, three-wire method (using two elements). This is useful when you want to determine the phase voltage in motors and other items under test with no neutral lines. Line to line voltage and phase current (measurements equivalent to 3V3A) can be estimated in systems not measured from a three-phase, three-wire configuration (using two elements).|
Added Frequency Measurement (/FQ)
In addition to the standard two channels of frequency measurement, a six-channel frequency measurement option is also available. This option provides frequency measurement of voltage and current on all eight channels (with input elements 1 through 4 installed). This is necessary when you want to measure voltage and current frequency from the instrument’s I/O as well as voltage and current frequencies of multiple items under test at the same time.
D/A Output (/DA)
Outputting measurement values as analog signals to other devices
- 20 channels
Measured valuescan be output as ±5V 5V FS DC voltages from the D/A output connector on the rear panel. Measured parameters can be output on up to twenty channels simultaneously. Even with four input elements installed, you can send up to five types of data per element to D/A output.
- D/A zoom
Normally the D/A output function outputs DC voltage scaled to a range of -5V to 5V* with respect to the measurement range. For this reason, it may not be possible to observe fluctuations in a nearly constant signal if the D/A output is set to go to ±5V at the measurement range rated value. One case in which this could happen is when a 100V measurement voltage fluctuates in the range of ±3V.
The WT3000 has a D/A zoom function to solve such problems. This function allows the any input signal range to be scaled to between -5V and 5V* in the D/A output as Upper and Lower ranges. This makes it possible to enlarge input signal fluctuations for observation using a recorder or logger.
|The optional built-in printer is installed on the front side of the WT3000, so it is easy to use even if the WT3000 is mounted on a rack. The printer can be used to print data and waveform memos.|
The Auto Print function allows you to set a time interval at which measured values are automatically printed on the built-in printer. You can also set a start and stop time in order to record data over a desired time period. You can also specify to print only the desired measured items.
VGA output (/V1)
Video output for viewing on a larger screen
The VGA port can be used to connect an external monitor in order to view numerical value data and waveforms on a larger screen. This capability is useful if you want to simultaneously check large amounts of data on a separate screen, or view data in a separate location.
Serial (RS-232) (/C2)
USB Port for Peripherals (/C5 Option)
|A USB port for peripherals with type A connectors can be included with the WT. The various kinds of data stored in the main unit such as voltage, current, and power, can be saved in binary or ASCII format on a peripheral such as a USB memory. You can also connect a keyboard for easy input of user-defined math expressions.|
USB Port for Connection to PC (/C12 Option)
The USB port (type B connector) on the rear panel of the WT3000 allows data communications with a PC¹. Also, instruments with this option installed can be used in conjunction with the communication functions of WTViewer (model 760122, sold separately) for data acquisition via USB².
- USB driver required for USB communications. A USB driver is available for download from our Web site.
- USB cable for connection to PC not included.
* USB stands for universal serial bus. USB is a standard designed to provide connectivity across a wide range of PC peripherals and other devices through the use of a common communication mechanism.
Ethernet Communication Function (/C7 Option)
* The WT3000 does not have a built-in hard disk. The FTP server function is available when a PC card or USB memory is inserted or connected to the PC.
Cycle-by-cycle function (/CC)
|With fluctuating data occurring when connecting to interconnected systems, or with motor evaluation*, in certain circumstances you may need to capture rapidly changing phenomena (such as during load fluctuations in a motor). These tasks can be handled effectively with the cycle-by-cycle measurement function. The function takes measurements of parameters such as voltage, current, and active power for each cycle, then lists the data on screen in a time series. Up to 3000 data (measurements of signals from 0.1 Hz to 1000 Hz) can be saved in CSV format.
* Requires the motor version (-MV)
Example of calculation with the cycle-by-cycle function
Flicker measurement (/FL)
This function enables measurement of voltage fluctuations/flicker in compliance with EN61000-3-3 and IEC61000-3-11. It can measure relative working voltage change, maximum relative voltage change (dmax), relative voltage change time (dt), short-term flicker value (Pst), and long-term flicker value (Plt). The initial limit values for the individual parameters are set in accordance with the IEC standard.
(Advanced Calculation Function /G6 and software for testing standards compliance)
IEC61000-3-3 Ed1.1 :2002, IEC61000-3-11
(Voltage fluctuation/flicker measurement, with the /FL option)
Support for IEC and JIS Standards Testing
|760301||WT3000 1 input element model|
|760302||WT3000 2 input element model|
|760303||WT3000 3 input element model|
|760304||WT3000 4 input element model|
|How Green is your Software?||Want to know how green is your Software? Intel® Energy Checker and Yokogawa can help you! The Intel® Energy Checker SDK provides software developers a simple way to measure the energy efficiency (greenness) of their Software by exposing the necessary and basic measurements made by Yokogawa’s highly accurate and reliable Power Analyzers.
|Evaluation of Lighting Devices||Simultaneous measurement of voltage, current, and THD (distortion factor||Learn More|
|Harmonic measurements||Harmonic measurements||Learn More|
|Measurement of Inverter Efficiency||Measuring efficiency with high precision: simultaneous measurement of input and output
|Measurement of Power Consumption in Mobile Phones||
Measurement of Power Consumption in Mobile Phones
|Measuring Conversion Efficiency of Power Conditioner||Measuring Conversion Efficiency of Power Conditioner||Learn More|
|Reference equipment for power calibration||Reference equipment for power calibration||Learn More|
|761922 Harmonic Analysis Software for WT3000 (Learn More)||The measurement procedures and settings for harmonic/flicker standards testing have been precisely defined.||Learn More|
|LabVIEW Drivers for WT3000||LabVIEW drivers for WT3000||y-Link|
|Power Consumption Measuring Software||For use with WT3000, WT1800,WT1600*1, WT500, WT210*1 and WT310. Conforms to IEC62301 Ed2.0(2011) and EN 50564:2011 testing methods. *1 The WT1600 and WT210 discontinued sales||y-Link|
|TMCTL||TMCTL is a DLL to support development of custom software. By using this DLL, users can write original programs to control instruments from a PC.||y-Link|
|USB Driver||The USB Driver is needed when required by the software.||y-Link|
|WT File Reader for WT500/WT1600/WT1800/WT3000||This software allows you to display data saved in WT500/WT1600/WT1800/WT3000 on your PC and change it to .csv format.||y-Link|
|WT3000 Sample Program - Visual Basic||This is a Visual Basic sample program of GP-IB/RS232/Ethernet/USB for WT3000||y-Link|
|WT3000 Sample Program - Visual Basic net||This is a Visual Basic net sample program of GP-IB/RS232/Ethernet/USB for WT3000||y-Link|
|WT3000 Sample Program - Visual C#||This is a Visual C# program of GP-IB/RS232/Ethernet/USB for WT3000||y-Link|
|WT3000 Sample Program - Visual C++||This is a Visual Basic C++ program of GP-IB/RS232/Ethernet/USB for WT3000||y-Link|
|WTViewer 760122 - Update||WTViewer acquires numeric, waveform, and harmonic data from the WT3000/WT1800/WT500 Digital Power Analyzer via Ethernet, GP-IB or serial communications (RS-232).||Learn More|
A 1 m long (366924) and
BNC-BNC 2m. For connection to simultaneously measurement with 2 units, or for input external trigger signal.
Compact instrument cart.
Deluxe instrument cart with adjustable shelf positioning.
All-purpose rolling instrument cart.
A set of 0.8m long red and black test leads, used in combination with a pair of optional 758922 or 758929 alligator-clip adapters.
Adapters for fitting a 4mm banana plug to a fork terminal. Set contains one black and one red clip
1000 Vrms-CAT II.
Rated at 300 V. Attaches to the 758917 test leads. Sold in pairs.
Safety Terminal Adapter Set
For conversion between BNC and female banana plug
Rated at 1000V. Attaches to the 758917 test leads. Sold in pairs.
For connection the external input of the WT3000 to the current sensor.
Printer Paper Roll
Thermal paper (10m) for WT1600, WT3000 - 1 roll