California Instruments 12000L-1P, Instruction Manual

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INSTRUCTIONAL MANUAL 2750L-P/4500L-P/6000L-P
August, 2001 Rev. K
-88-
4.3 PERIODIC CALIBRATION
The following periodic calibration adjustments should be performed on a 1 year interval.
4.3.1 VOLTAGE CALIBRATION
Apply power top 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 *CLK = 02
*WVF = 03 RNG = 04
*May not be displayed. Depends on configuration.
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. Verify 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.l
If the output voltage is greater than the programmed output, depress and hold the
↓
key until the
correct output voltage 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 135.0 volts.
2. Depress the MNU key several times until the Menu screen is displayed as illustrated below:
SNC = 01 *CLK = 02
*WVF = 03 RNG = 04
*May not be displayed. Depends on configuration.
3. Enter the key sequence: 959 ENT.