KEPCO BIT 232F - Manual (Page 17)

BIT 232 022800 3-1
SECTION 3 - CALIBRATION
NOTE: The calibration procedures below are for the purpose of recalibration and for the case
where the BIT card is installed by the user. Unless otherwise noted, syntax is in SCPI.
3.1 EQUIPMENT REQUIRED
The following is a listing of equipment required for calibration of the BIT Card installed in a
Kepco “BOP” Series Power Supply:
A. Precision digital voltmeter (DVM), 5 digit minimum resolution (suggested).
B. An RS232 compatible Controller, (with appropriate software) connected to BOP Power Sup-
ply with an RS232 cable.
C. Precision four-terminal current shunt (with suitable power rating and tolerance for the cur-
rents to be measured).
3.2 ADJUSTMENT OF THE BOP ±10 VOLT CALIBRATION CONTROLS (R31, R32)
NOTE: BOP cover removal required for this procedure.
1. Connect a DVM to the REAR PROGRAMMING CONNECTOR (PC-12); between common
and pin 28 (+10Vdc REFERENCE).
2. Turn the BOP Power Supply “ON” and locate the calibration controls (see Figure 3-1, refer to
Table 3-1). Adjust R31 for +10.000Vdc.
3. Turn the BOP Power Supply “OFF” and connect DVM between common and pin 22 (–10Vdc
REFERENCE).
4. Turn the BOP Power Supply “ON”. Adjust R32 for –10.000Vdc.
5. Turn the BOP Power Supply “OFF”.
3.3 ADJUSTMENT OF THE AMMETER ZERO (R50)
1. Without a load connected to the BOP output, connect the DVM to the REAR PROGRAM-
MING CONNECTOR (PC-12); between COMMON and pin 10.
2. Turn the BOP Power Supply “ON” and locate AMMETER ZERO control R50 (see Figure 3-1,
refer to Table 3-1).
3. Adjust the control for zero, ±100 microvolts.
4. Turn the BOP Power Supply “OFF”.