Specifications
55
OPTIONS
The advanced calculation function (/G6 option) meets these measuring needs with
advanced, powerful features for making power analysis measurements more efficient.
Advanced Computation (/G6)
Checking harmonic components and total harmonic distortion (THD)
Harmonic measurement software* can be used in this dedicated mode for harmonic
measurement that supports international standards. This allows confirmation of
whether or not home electronics, office automation equipment, or other devices
conform with harmonic standards.
* IEC standard compliant harmonic measurement requires the model 761922 harmonic
measurement software.
IEC harmonic measurement mode (/G6)
Performing IEC harmonic standards tests
Enables voltage fluctuation/flicker measurement conforming to IEC61000-3-3.
The following values related to voltage fluctuation that are stipulated by the IEC61000-
3-3 standard can be calculated from the measured data: dc (relative steady-state
voltage change), dmax (maximum relative voltage change), dt (relative voltage
change time), short-term flicker value Pst, long-term flicker value Plt, instantaneous
flicker sensation, and others. In this mode, you can judge whether voltage fluctuations
in the item under test relative to a specified minimum value are within the standard.
* The flicker test can also be performed with the WT3000 alone. Using the model 761922
harmonic/flicker measurement software (sold separately), you can display trend graphs,
CPF graphs, or reports of the dc, dmax, and IFS (instantaneous flicker sensation) values
in addition to the WT3000 judgment results.
Voltage Fluctuation and Flicker Measurement (/FL)
Input signal and FFT data Input signal and power waveform
Measurement data display
This function allows you to calculate individual phase
voltages from the line voltage measured in a three-phase,
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.
Note: This function cannot be used for products with only one
element.
• Harmonic Measurement in Normal Measurement Mode
You can measure harmonic data while in normal measurement mode. This is effective
for observing values from normal measurements and harmonic data at the same time.
• Wide Bandwidth Harmonic Measurement
This dedicated harmonic measurement function is distinct from the harmonic
measurements that can be taken in normal measurement mode. The function is
useful for ascertaining the distortion factor and harmonic components in strain
measurements of fundamental frequencies from 0.1 Hz to 2.6 kHz. It allows wide
bandwidth measurements of signals that include high frequency waves, such as from
power supplies and acceleration of motor revolution.
• Waveform Computation
You can perform computations on measured waveforms, and display power
(instantaneous voltage × instantaneous current) and other waveforms on screen.
• FFT
You can analyze and display a waveform’s individual frequency components. You can
also check signal components other than the integer multiples of the fundamental wave.
• Waveform Sampling Data Saving
You can save sampling data of input waveforms, waveform computations, and FFT
computations. The data is available for any kind of computation by PC software.
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.
Delta Calculation (/DT)
Built-in printer (/B5)
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.
USB Port (Peripheral) Option (/C5)
You can save voltage, current, power, and other kinds of data that are stored in the
WT3000 to a USB Memory. The data can be saved in binary or ASCII format. You
can also connect a keyboard for easy input of user-defined math expressions.
Checking phase voltage when you measure line voltage
• 20 Channels
Measured values and calculated value by user-defined function can be output as ± 5V
FS DC voltages from the D/A output connector on the rear panel.
• D/A zoom
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.
D/A Output (/DA)
Outputting measurement values as analog signals
Output graphics at the touch of a button
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. Input frequencies from
0.1 Hz to 1000 Hz can be measured. Up to
3000 data can be saved in CSV format. Also,
with the WTViewer software (model 760122,
sold separately), data can be displayed in
graphs by cycle.
Cycle by Cycle Measurement (/CC)
Capturing cycle-by-cycle fluctuations
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.
VGA output (/V1)
Video output for viewing on a larger screen
Checking the frequencies of all inputs
T phase
R phase
S phase
Note: When taking measurements that incorporate measuring instrument options, certain functions, displays, and measuring functions may be limited depending on the measurement mode.
For example, waveform and FFT computations may not be used simultaneously.
䉴 A wide variety of optional functions make it easy to perform
sophisticated power evaluations.
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.