KEPCO BIT 4882F - Manual (Page 24)

3-4
BIT 4882 030507
2. MEASURE the output voltage using programming commands, then check the readback
data.
• In SCPI send
MEAS:VOLT?
• In CIIL: send
FNC DCS:CH1 GAL
F0
INX VOLT
FTH VOLT
NOTE: For subsequent measurements using CIIL it is only necessary to send
INX
VOLT
and
FTH VOLT
commands.
3. Locate VOLTAGE READBACK ZERO control R35 (see Figures 2-1 and 3-1, refer to Table 3-
1).
4. Adjust control R35 until the readback value is not 0.0 using MEASURE commands (see step
2) as needed.
5. Adjust control R35 (opposite direction from step 4 above) until the readback value is 0.0
using MEASURE commands (see step 2) as needed. Once a stable value of 0.0 is reached,
continue rotating R35 four full (360°) turns in the same direction. Verify readback voltage is
0.0 using MEASURE commands (see step 2) as needed.
3.7 VOLTAGE READING CALIBRATION (R19)
1. Program the BOP power supply for PLUS FULL SCALE VOLTAGE, less one percent, e.g.,
for a 20V unit, program BOP to 19.8V (verify by reading external DVM).
• If using SCPI send
VOLT yy;CURR MAX
• If using CIIL send
FNC DCS:CH1 VOLT yy with CURL .5
where
yy
is the maximum rated output voltage of the BOP less one percent.
2. MEASURE the output voltage using programming commands, then check the readback
data.
• In SCPI send
MEAS:VOLT?
• In CIIL: send
FNC DCS:CH1 GAL
F0
INX VOLT
FTH VOLT
NOTE: For subsequent measurements using CIIL it is only necessary to send
INX
VOLT
and
FTH VOLT
commands.
3. Locate VOLTAGE READ. CAL. control R19 (see Figures 2-1 and 3-1, refer to Table 3-1).
4. Adjust control R19 until the readback value matches the programmed value using MEA-
SURE commands (see step 2) as needed.
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 (R
S
) between the
FRONT PANEL OUTPUT TERMINALS.
2. Connect the DVM to the other two terminals of the precision shunt as shown in Figure 3-2.