YOKOGAWA WT110 User Manual page 15

Integrator Functions
Frequency Measurement Function
Harmonic Analysis Function (option)
Storage/Recalling of Measured data and Setting Parameters
D/A Output Function (option)
Comparator Function (option)
IM 253401-01E
Four Arithmetic Operation Function (Applies to WT110/WT130 with ROM
Version 2.01 or later)
Results from six types of arithmetic operations can be displayed. (A+B, A-B, A * B, A/B, A2/B,
A/B2)
Crest Factor Computing Function (Applies to WT110/WT130 with ROM
Version 2.01 or later)
Crest factor is determined by peak value/RMS value. Crest factor of the voltage and current are
computed and displayed on models that have the peak measurement function.
Peak Measurement Function (Applies to WT110/WT130 with ROM Version
2.01 or later)
This function measures the peak value of the voltage and current. Crest factor (peak value/RMS
value) can also be computed and displayed.
This function enables integration of active power and current. All measurement values (and
computed values) can be displayed, even when integration is in progress, except for the
integrated values (watt hour and ampere hour) and elapsed integration time. Since also
integrated values of negative polarity can be displayed, the consumed watt hour (ampere hour)
value of the positive side and the watt hour value returning to the power supply of the negative
side can be displayed seperately.
This function enables measurement of the frequency of input voltage and current.
Measuring range is from 10Hz to 50kHz (however, depending on the internal timing of the
instrument, measurement might be carried out in the range from 4Hz to 10Hz also).
This function enables computation of voltage, current, active power and so forth of up to the
50th order, the relative harmonic content of harmonic orders and the phase angle of each order
compared to the fundamental (first order). This is for one selected input element. Furthermore,
the total rms value (fundamental + harmonic) of the voltage, current and active power, and the
harmonic distortion factor (THD) can be calculated.
This function enables the storage of measured data and setting parameters into the internal
memory. Furthermore, after recalling measured data or setting parameters, these data can be
displayed or output by communication interface.
This function enables output of measured values of voltage, current, active power, apparent
power, reactive power, power factor and phase angle as a DC analog signal with full scale of
±5V. Output items up to 12 output channels (253401: 4 channels) can be selected.
This function compares the measured values of voltage, current, active power, apparent power,
reactive power, power factor and phase angle and such with preset limit values. When the
measured values cross those preset limits, a contact output relay will be activated. Output items
up to 4 channels can be set.
1.2 Functions
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