16-7
IM 760401-01E
Specifications
16
Item Specifications
Scaling When performing voltage or current measurements with items such as external PT, CT, shunt, and
external sensor (clamp), set a scaling factor to the primary/secondary ratio.
• Significant digits: Selected automatically according to significant digits in the voltage and current
ranges.
• Selectable range: 0.001 to 9999
Averaging Select the method from the following two types.
• Exponential averaging method
• Moving average method
Select the attenuation constant for exponential averaging; select the sample number from 8, 16, 32,
and 64 for moving average.
Efficiency Computation of efficiency is possible on the WT230.
Crest factor Computes the crest factor (peak value/RMS value) of voltage and current.
Four arithmetic operation Six types of four arithmetic operations possible
(A+B, A–B, A*B, A/B, A
2
/B, and A/B
2
)
Average active power Computes the average active power within the integrated period.
during integration
Integration
Item Specifications
Mode Select manual integration mode, standard integration mode, or repetitive integration mode.
Timer Automatically stop integration by setting a timer.
Selectable range: 0 hours 00 minutes 00 seconds to 10000 hours 00 minutes 00 seconds
(Set automatically to manual integration mode for 0 hours 00 minutes 00 seconds)
Count overflow Holds the elapsed integration time and integration value and stops integration when the elapsed
time of integration reaches the maximum integration time of 10000 hours or when the integrated
value reaches the maximum displayable integration value (999999M or –99999M).
Accuracy ±(Power accuracy (or current accuracy) + 0.1% of reading)
Timer accuracy ±0.02%
Remote control Start, stop, reset possible using an external remote signal.
(applies to products with the /DA4, /DA12, or /CMP option)
16.3 Functions
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