Table of Contents
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Item
Scaling
Averaging
Efficiency
Crest factor
Four arithmetic operation
Average active power
during integration
Integration
Item
Mode
Timer
Count overflow
Accuracy
Timer accuracy
Remote control
IM 760401-01E
Specifications
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
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.
Computation of efficiency is possible on the WT230.
Computes the crest factor (peak value/RMS value) of voltage and current.
Six types of four arithmetic operations possible
2
(A+B, A–B, A*B, A/B, A
/B, and A/B
Computes the average active power within the integrated period.
Specifications
Select manual integration mode, standard integration mode, or repetitive integration mode.
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)
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).
±(Power accuracy (or current accuracy) + 0.1% of reading)
±0.02%
Start, stop, reset possible using an external remote signal.
(applies to products with the /DA4, /DA12, or /CMP option)
2
)
16.3 Functions
16
16-7
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