A wide variety of optional functions make it easy to perform sophisticated power evaluations.
When you purchase a WT3000E 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
Enables harmonic measurement over wide bandwidths. Supports measure-ment of harmonic signals beyond those of the harmonic measurement func-tion in normal measurement mode. This option allows for harmonic analysis on waveforms with a fundamental frequency range of 0.1 Hz–2.6 kHz (*1). You can measure up to the 50th order harmonic at 1 kHz fundamental.(*2).
*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
Harmonic and normal power parameters measurement at same time
This function enables simultaneous measurement of normal and harmonic data, which was impossible with previous Yokogawa models. Since with the WT3000E you can simultaneously confirm total voltage and current as well as the distortion factor and fundamental wave without switching modes, this allows for more accurate and efficient measurement of the power supply quality, the fundamental wave of motor drive voltage, and other factors.
IEC Harmonic Measurement Mode
Can perform tests conforming to international standards.
The IEC harmonic measurement mode meets the window width requirement of the latest IEC harmonic standard (10 cycles of 50 Hz and 12 cycles of 60 Hz). Also, this mode allows users to use the 761922 harmonic measurement software to perform tests conforming to IEC 61000-3-2 and IEC61000-3-12.
* These modes cannot be used at the same time.
FFT Calculation Mode
More detailed frequency analysis than with the harmonic measurement mode.
Two FFT calculations can be performed simultaneously on waveform data of measured voltage and current. You can select a resolution for FFT of 1 Hz or 10 Hz. FFT analysis of up to 100 kHz can be performed.
Waveform Calculation Mode
Monitoring of instantaneous power waveforms.
Up to two waveform calculations and other Waveform Calculation functions can be used at once. If you create a formula that multiplies voltage and current waveforms, you can confirm an instantaneous power waveform on screen. Waveform Calculation data can be saved in CSV or WVF format.
Waveform Sampling Data Saving Function
Saving of detailed waveform data for confirmation.
All captured voltage and current waveform data (200 kS/s), calculated wave-forms, and FFT calculated waveforms can be saved. You can choose to save in CSV or WVF format, and to save to PC card or USB memory (/C5 option).
Motor Evaluation Option (/MTR)
- Calculation of motor and total efficiency
In addition to the functions of the standard version, the new models offer powerful motor/inverter evaluation functions
- Voltage, current, and power measurement with torque and speed input
Measures torque meter and speed sensor output (analog or pulse output), and allows calculation of torque, revolution speed, mechanical power, synchronous speed, slip, motor efficiency, and total efficiency in a single unit.
Added Frequency Measurement (/FQ)
Checking the frequencies of all inputs
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 WT3000E 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 range is 0V to 5V for some functions, such as frequency measurement
Built-in printer (/B5)
Output graphics at the touch of a button
|The optional built-in printer is installed on the front side of the WT3000E, so it is easy to use even if the WT3000E is mounted on a rack. The printer can be used to print data and waveform memos.
Auto Print Function
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.
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) (/C1)
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 WT3000E allows data communications with a PC¹. Also, instruments with this option installed can be used in conjunction with the communication functions of PC application software 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 option conforms to 100BASE-TX and 10BASE-T and provides for data exchange via communications. The option supports file transfers via FTP server, as well as FTP client (network drives), LPR client (network printers), and e-mail (SMTP client) functions.
* The WT3000E 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.
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.
IEC61000-3-2, IEC61000-3-12, JIS C 31000-3-2
(Advanced Calculation Function /G6 and software for testing standards compliance)
(Voltage fluctuation/flicker measurement, with the /FL option)
Support for IEC and JIS Standards Testing