Instruction manual

89
4.3. PERIODIC CALIBRATION
The following periodic calibration adjustments should be performed on a 1 year interval.
4.3.1. VOLTAGE CALIBRATION
Apply power to the AC Power System and allow at least fifteen minutes for temperature
stabilization. Program the output to 60 Hz , 135 volts and perform the following steps:
1) Connect the AC voltmeter to the phase to be calibrated.
2) Depress the MNU key several times until the first menu screen is displayed as
illustrated below.
SNC = 01 RNG = 04
3) Enter the key sequence: 959 ENT
4) Depress the MNU key several times until the configuration menu screen is displayed
as illustrated below:
CFG = 16 ALM = 17
FLM = 18 CLM = 19
5) Select the CAL screen with the key sequence: 12 ENT
6) Depress the A, B or C key for the output phase to be calibrated. Verfiy that the
other phases are in the MON mode. The a, B, or C keys will switch the respective
phase between the MON and PRG mode. If the output voltage is greater than the
programmed output, depress and hold the ↓ key until the correct output volrage has
been reached. The ↑ key is used if the output is less than the programmed value.
7) Repeat step 6 for other outputs to be calibrated..
4.3.2. VOLTAGE MEASUREMENT CALIBRATION
For calibration of voltage measurement first perform the output voltage calibration and then
perform the followings steps:
1. Remove the load from the AC Power System and program 60 Hz and the 135.0
volts.