8 adjustment of the output current zero (r83), 10 current reading zero calibration (r36), Adjustment of the output current zero (r83) -4 – KEPCO BIT 232F User Manual
Page 20: Current reading zero calibration (r36) -4
3-4
BIT 232 022800
4. Continue to ‘MEASURE’ (‘FETCH’ in CIIL syntax) the VOLTAGE READING while adjusting
control R19, until the ‘MEASUREd’ (‘FETCHed’ in CIIL syntax) value matches the pro-
grammed value.
5. Turn the BOP Power Supply “OFF”.
3.8
ADJUSTMENT OF THE OUTPUT CURRENT ZERO (R83)
1. With the BOP Power Supply “OFF”, connect a precision current shunt between the FRONT
PANEL OUTPUT TERMINALS.
2. Connect the DVM to the REAR PROGRAMMING CONNECTOR (PC 12); between COM-
MON and pin 10.
3. Turn the BOP “ON” and program the BOP Power Supply to ZERO CURRENT and MAXI-
MUM VOLTAGE LIMIT.
4. Locate Io COMP AMP ZERO control R83 (see Figure 3-1, refer to Table 3-1).
5. Adjust control R83 for zero, ±0.5 millivolts.
6. Turn the BOP Power Supply “OFF”.
3.9
ADJUSTMENT OF THE FULL SCALE OUTPUT CURRENT (R22)
1. With the BOP Power Supply “OFF”, connect the DVM to the PRECISION 4-TERMINAL
SHUNT (see Figure 3-2)
2. Turn the BOP Power Supply “ON” and program the BOP Power Supply for PLUS FULL
SCALE CURRENT and MAXIMUM VOLTAGE LIMIT.
3. Locate CURRENT FULL SCALE control R22 (see Figures 2-1 and 3-1, refer to Table 3-1).
4. Adjust control R22 for exactly FULL SCALE CURRENT.
5. Program the BOP Power Supply for MINUS FULL SCALE CURRENT. The output should be
NEGATIVE FULL SCALE within ±0.024% (±1 LSB or ±1 mA [which ever is greater] ) of the
POSITIVE VALUE.
3.10
CURRENT READING ZERO CALIBRATION (R36)
1. Program the BOP Power Supply for ZERO CURRENT and MAXIMUM VOLTAGE LIMIT.
2. ‘MEASURE’ (‘FETCH’ in CIIL syntax) the OUTPUT CURRENT of the BOP Power Supply.
3. Locate CURRENT READBACK ZERO control R36 (see Figures 2-1 and 3-1, refer to Table
3-1).
4. Continue to ‘MEASURE’ (‘FETCH’ in CIIL syntax) the CURRENT, while adjusting control
R36, until the ‘MEASUREd’ (‘FETCHed’ in CIIL syntax) value is not 0.0.
5. Continue to ‘MEASURE’ (‘FETCH’ in CIIL syntax) the OUTPUT CURRENT while adjusting
control R36 until the ‘MEASUREd’ (‘FETCHed’ in CIIL syntax) value is 0.0. Once a stable
value of 0.0 is reached, continue rotating R36 four full (360 °) turns in the same direction. Ver-
ify OUTPUT CURRRENT is 0.0.