AMETEK i-iX Series II - Manual (Page 148)

User Manual California Instruments
148 i Series II / iX Series II / iM Series II
6.6.3 Power Source Gain Adjustment:
To make this adjustment the top cover must be removed and voltages must be monitored at
various test points. The test point used depends upon the phase (chassis) to be adjusted. The
adjustment is R14 on the Current Limit Board. Refer to Figure 6-3 for the location R14 on the
Current Limit Board.
1. Monitor the AC output of the Phase A power source using a DMM in VAC mode.
2. Turn the ALC mode OFF in the UTILITY, VOLTAGE CURRENT control screen of the master
power source. The ALC mode would interfere with this adjustment if left ON.
3. Select AC mode, high voltage range and program 240 VAC.
4. Program the frequency to 60 Hz.
5. Record the output voltage with the external AC DVM. Make no adjustment at this point.
6. Now program 400 Hz and adjust R14 to the AC output recorded in step 5.
7. Repeat steps 4 through 6 until the voltage at 400 Hz is within ± 1.0 VAC of the voltage at 60
Hz.
For multiphase power systems with one controller, 9003i/iX, 10002i/iX or 15003i/iX, the
adjustment for Phase B and C must be made to R14 on the Current Limit Board for the power
source chassis of the respective phase.
For 30003i/iX systems, the adjustment must be made to all six chassis’ current limit boards.
6.6.4 Output Adjustment:
Connect the test equipment to the power source as shown in Figure 6-2. The AC output
calibration does not require an AC DVM operating with the highest accuracy. Either a Fluke
8506A or a HP 34401A may be used. If a HP 34401A is used it must be put into the slow filter
mode.
Proceed as follows:
1. Program the power source to the AC mode, ALC OFF,
2. Select the Low AC voltage range (150VAC range)
3. Program 10VAC and 60 Hz.
4. Connect the AC DVM across the Phase A output terminals.
5. Close the output relay (Output ON)
6. Adjust R234 on the Controller to obtain a 10 VAC reading on the DVM.
7. Repeat this test for the Phase B and C output terminals but adjust R235 for Phase B and
R236 for Phase C. The DMM connections must be moved to phase B and phase C
respectively.
Next, perform the output calibration as shown in 6.4.