KEPCO BOP 1KW-MG Operator Manual, Firmware Ver.2.38 to 2.47 - Manual (Page 137)

BOP-1K 080709
4-9
possible above the nominal full scale value within tolerance specified in Table 4-4 for +FULL
SCALE CURRENT.
19.Set the BOP to maximum negative output current by sending CAL:CURR MIN. Continue to
measure the output current of the supply using the DVM connected to the sense resistor. To
adjust, send CAL:DATA commands as needed (see PAR. 4.3b) to adjust the BOP output
until the DVM reads as close as possible above (absolute value) the nominal full scale value
within tolerance specified in Table 4-4 for –FULL SCALE CURRENT.
20.Send CAL:CPR MAX to adjust the maximum positive current protection limit of the power
supply. To adjust, send CAL:DATA commands as needed (see PAR. 4.3c) to adjust the BOP
output until the DVM reads as close as possible above the nominal full scale value within tol-
erance specified in Table 4-4 for +FULL SCALE CPR LIMIT.
21.Send CAL:CPR MIN to adjust the minimum (maximum negative) current protection limit of
the power supply. To adjust, send CAL:DATA commands as needed (see PAR. 4.3c) to
adjust the BOP output until the DVM reads as close as possible above (absolute value) the
nominal full scale value within tolerance specified in Table 4-4 for –FULL SCALE CPR LIMIT.
22.Send CAL:ZERO to set the BOP output to zero. Connect 0V ±0.1mV d-c reference voltage to
external reference pin 11 referenced to pin 4 (SGND) of the BOP analog I/O port (A2A5J6).
Set the BOP to zero volts across the sense resistor (corresponding to zero current) by send-
ing CAL:CEXT ZERO. Send CAL:DATA commands as needed (see PAR. 4.3a) until the
reading is as close to zero as possible within the limits specified in Table 4-4 for CURRENT
ZERO.
23.Replace the 0V d-c reference applied to analog I/O port A2A5J6 pin 11 with a +10V ±0.1mV
d-c reference voltage. Set the BOP to maximum positive output current by sending
CAL:CEXT MAX. Measure the current by reading the voltage across the sense resistor. To
adjust, send CAL:DATA commands as needed (see PAR. 4.3b) to adjust the BOP output
until the DVM reads as close as possible above the nominal full scale value within tolerance
specified in Table 4-4 for +FULL SCALE CURRENT.
24.Replace the +10V d-c reference applied to analog I/O port A2A5J6 pin 11 with a 0V ±0.1mV
d-c reference voltage. Set the BOP to zero volts across the sense resistor (corresponding to
zero current) by sending CAL:CGA ZERO. Send CAL:DATA commands as needed (see
PAR. 4.3a) until the reading is as close to zero as possible within the limits specified in Table
4-4 for CURRENT ZERO.
25.Replace the 0V d-c reference applied to analog I/O port A2A5J6 pin 11 with a +10V ±0.1mV
d-c reference voltage. Set the BOP to maximum positive output current by sending CAL:CGA
MAX. Measure the current by reading the voltage across the sense resistor. To adjust, send
CAL:DATA commands as needed (see PAR. 4.3b) to adjust the BOP output until the DVM
reads as close as close to zero as possible within the limits specified in Table 4-4 for CUR-
RENT ZERO.
26.Set the BOP to zero amperes output by sending CAL:CLIM ZERO., then connect 0V ±0.1mV
d-c reference voltage from the external voltage source to ILIM+_EXTERNAL and
ILIM-_EXTERNAL pins, pins 5 and 13, referenced to pin 12 (GND1) of the BOP analog I/O
connector (A2A5J6). Then send the CAL:ZERO command. This enables the BOP to recog-
nize that the voltage at the ILIM_EXTERNAL pins is 0V.