KEPCO BOP 5-20DL, Operator'S Manual

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BOP 5-20DL 081915
4-3
4.2.2 UNCOMMITTED AMPLIFIER “A” ZERO ADJUSTMENT (A1R41)
1. Without a load connected at the output, set MODE switch to VOLTAGE and VOLTAGE CON-
TROL switch to OFF.
2. Place a short circuit across the front panel VOLTAGE PROGRAMMING INPUT terminals.
3. Connect a Digital Voltmeter (DVM) to Rear Programming connector pin 5, referenced to pin
29 (signal common).
4. Locate the PREAMP “A” ZERO control (see Figure 4-2, A1R41), then turn the BOP on and
adjust control for 0V ±0.1mV, as read on DVM.
4.2.3 UNCOMMITTED AMPLIFIER “B” ZERO ADJUSTMENT (A1R42)
1. Without a load connected at the output, set MODE switch to VOLTAGE and VOLTAGE CON-
TROL switch to OFF.
2. Place a short circuit across the front panel CURRENT PROGRAMMING INPUT terminals.
3. Connect a Digital Voltmeter (DVM) to Rear Programming connector pin 2, referenced to pin
29 (signal common).
4. Locate the PREAMP “B” ZERO control (see Figure 4-2, A1R42), then turn the BOP on and
adjust control for 0V ±0.1mV, as read on DVM.
4.2.4 ADJUSTMENT OF AMMETER ZERO CONTROL (A1R50)
1. Without a load connected to the BOP output, and MODE switch set to VOLTAGE, connect a
digital voltmeter (DVM) to terminal 10 of the Rear Programming Connector referenced to
Common (terminal 23, 25, 27, 29, 31 or 33).
2. Turn the BOP on and locate the Ammeter Zero control (A1R50, Figure 4-2).
3. Adjust control to 0V ±0.1mV as read on DVM.