Pwrf Test - Voltech AT5600 User Manual

C H A P T E R 1 0 – S P E C I F I C A T I O N S
10.2.33.
The measurement accuracy is based on the chosen test conditions and power
factor, and is given by:
At = Ar + Ac + Av + Ai + Apf
where:
where:
where:
AT5600 User Manual 98-119 issue 30

PWRF Test

At is the total accuracy (%)
Ar is the basic relative accuracy (%)
Ac is the calibration accuracy (%)
Av is the correction for voltage level (%)
Ai is the correction for current level (%)
Apf is the correction for power factor (%)
Ar = 0.50 %
Ac = 0.24 % + (0.003 % * F)
Av = 0.08 % + (0.02 % / V)
Ai = 0.08 % + (0.02 % / I ) + (3.00 % * I)
Apf = 1.00 % * ( (SQRT (1-PF^2) ) / PF)
is the test frequency (Hz)
F
V is the measured voltage (V)
is the measured current (A)
I
is the power factor of the load.
PF
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