koban KPAW-01 Manuel page 155

KPAW-01
TRUE RMS 1000A AC WATT Clamp Meter
OL will be displayed when the reading is over than that.
5. MAXMIN are not valid when measuring active energy.
6. Press CLEAR and hold for 1 seconds to reset the time
and energy.
Note
When there is no input signal, it cannot carry out active
energy measurement.
When testing has been completed, disconnect the
connection between the testing leads and the circuit under
test and remove testing leads from the input terminals.
True RMS Measurement and Average Value
Measurement
The True RMS measurement method can measure
accurately the effective value of non-sine wave input signal.
Average value measurement method can measure the
mean value of one sine wave input signal, and then displays
it as RMS value
When the input waveform has distortion, measuring
tolerance will be included. The total tolerance depends on
the total distortion. Below table 1 shows the waveform
coefficient and the relationship and the requested changing
factor of sine wave, square wave, pulse rectangle wave,
sawtooth triangle wave, RMS value and average value.
The clamp Meter software designning base on the following
formula:
KW = KVA × Cosθ
KVAr = KVA × Sinθ
KVA =
30
KW +
2
KVAr
2
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