SECTION 8 CALIBRATION
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8.3.1 K FACTOR DISPLAY
The correction factors (kFactors) created during EXTERNALLY REFERENCED CALIBRATION may be
displayed or modified directly, from the kFactors display screen. Activate the CALIBRATION Menu (fn,
4), press 3 and the kFactor display appears as shown below.
Kin A:1.0000 B:1.0000 C:1.0000
Kex A:1.0000 B:1.0000 C:1.0000
Ki A:1.0000 B:1.0000 C:1.0000 1P:1.0000
Kin - are the kFactors for internal voltage sensing of phase A, B and C.
Kex - are the kFactors for external voltage sensing of phase A, B and C.
Ki - are the kFactors for current sensing of phase A, B and C.
1P - is the kFactor for single phase current sensing.
It is recommended that the kFactors are reset to 1.000 before calibration. The new kFactor is then the ratio
of the external metered value to the UPC meter display value. This minimizes error and will provide the best
results.
To manually calculate and enter a particular kFactor,
1. observe the UPC meter display value
2. use the following equation to calculate the new k factor:
8.3.2 RESET ALL KFACTORS
Reset all kFactors to the factory default value (1.000).
Activate the CALIBRATION Menu (fn, 4), press 1 and the kFactor reset warning appears as shown
below.
WARNING: RECALIBRATION REQUIRED
PRESS "EXECUTE" TO CONTINUE
PRESS "CLEAR" TO CANCEL
NOTE: The UPC and Power Source will continue to operate properly but accuracy will be only about
2%. You will have to recalibrate your power source for accurate output and metering.
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