Instruction manual

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4.4.3. OUTPUT PHASE ANGLE CALIBRATION
The phase calibration values for phases B and C are entered on the Phase Offset (POF) screen.
To calibrate the output phase angle, connect either a Phase Meter or an oscilloscope between the
phase to be calibrated and the phase A output. Program the phase B or C value to be calibrated
from the Phase screen (PHZ). If an oscilloscope is used the calibration is best performed with a
programmed angle of 0 degrees.
To calibrate the output phase angle, program 120.0 volts and 60 Hz.
To access the POF screen perform the following key sequences:
1. Access the Phase screen (PHZ).
2. Depress the MNU key several times until the following screen is displayed:
SNC = 01 CLK = 02
WFV = 03 RNG = 04
3. Enter the key sequence: 959 ENT
4. Depress the MNU key several times until the Configuration menu screen is
displayed:
CFG = 16 ALM = 17
FLM = 18 CLM = 19
5. To display the POF screen enter the key sequence: 20 ENT
If an oscilloscope is used and the respective phase is programmed to 0 degrees and 200 Hz, a 3
degree error is represented by 41 microseconds of the 0 volt point of the two signals.
The POF values may be either a positive or negative value. A negative value is entered by
depressing the period key (.) two times after the numerical value is entered before the PRG key is
depressed.