KEPCO BIT 4886 Operator Manual - Manual (Page 23)

BIT 4886 120413
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 Interface Card installed in a
Kepco “BOP” Series Power Supply:
A. Precision digital voltmeter (DVM), minimum resolution 7 digits (suggested):
B. An IEEE 488 System Controller, (with appropriate software) connected to BOP Power
Supply with an IEEE 488 cable.
C. Precision four-terminal current shunt (sense resistor) with suitable power rating and tol-
erance for the currents to be measured.
D. Heat sink, capable of dissipating 10 times power rating of sense resistor
3.2 BOP POWER SUPPLY ADJUSTMENTS
3.2.1 ADJUSTMENT OF THE BOP ±10 VOLT CALIBRATION CONTROLS (R31, R32)
NOTE: BOP cover removal required for this step.
1. Connect the 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). Adjust
R31 for +10.00 ±0.01Vdc.
3. Turn the BOP Power Supply “OFF” and connect DVM between common and pin 22 (–10Vdc
REFERENCE) at the REAR PROGRAMMING CONNECTOR (PC 12).
4. Turn the BOP Power Supply “ON.” Adjust R32 for –10.00 ±0.01Vdc.
5. Turn the BOP Power Supply “OFF.”
3.2.2 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).
3. Adjust the AMMETER ZERO control R50 for zero, ±100 microvolts.
4. Turn the BOP Power Supply “OFF.”