KEPCO BOP 1KW-MG Operator Manual, Firmware Ver.2.38 to 2.47 - Manual (Page 138)

4-10
BOP-1K 080709
27.Connect +10.0V ±0.1mV d-c reference voltage from the external voltage source to
ILIM+_EXTERNAL and ILIM-_EXTERNAL, pins 5 and 13, referenced to pin 12 (GND1) of
the BOP analog I/O connector (A2A5J6). Then send CAL:CLIM MAX, then CAL:ZERO com-
mands. This enables the BOP to recognize that the voltage at the ILIM+_EXTERNAL pin is
10.0V.
28.Set the BOP to minimum (maximum negative) output by sending CAL:VLIM MIN, then send
the CAL:ZERO command. This enables the BOP to recognize that the voltage at the VLIM-
_EXTERNAL pin is 10.0V.
29.Send CAL:ZERO to prepare for calibration of IOUT_M_UNIT (master output) control signal.
Connect the DVM to pin 6 (IOUT_M_UNIT) referenced to pin 1 (SGND) of the PAR/SER
CONTROL IN connector (A2A5J3). Set the BOP to zero output current by sending
CAL:IOUT ZERO. Send CAL:DATA commands as needed (see PAR. 4.3b) to adjust the
BOP output until the DVM reads 0V ±1mV.
30.Set the BOP to maximum positive output current by sending CAL:IOUT MAX. With the DVM
still connected to pin 6 (IOUT_M_UNIT) referenced to pin 1 (SGND) of the PAR/SER CON-
TROL IN connector measure the voltage output using the DVM. Send CAL:DATA commands
as needed (see PAR. 4.2.1a) until the DVM reading is +10V ±1.0mV.
31.Send CAL:ZERO to prepare for calibration of S_IN_PARALLEL (slave input) control signal.
Connect a 0V ±0.1mV d-c reference to pin 3 (S_IN_PARALLEL) referenced to pin 1 (SGND)
of the PAR/SER CONTROL IN connector (A2A5J3). Set the BOP to zero output current by
sending CAL:PAR ZERO. Connect the DVM across the sense resistor to measure the BOP
output current and send CAL:DATA commands as needed (see PAR. 4.3b) to adjust the
BOP output current until the DVM reads as close to zero as possible within tolerance speci-
fied in Table 4-4 for CURRENT ZERO.
NOTE: Accuracy of the 10V d-c reference must be ±0.1mV in order for the calibrated unit to
meet published specifications.
32.Connect a +10V ±0.1mV d-c reference to pin 3 (S_IN_PARALLEL) referenced to pin 1
(SGND) of the PAR/SER CONTROL IN connector (A2A5J3). Set the BOP to maximum posi-
tive output current by sending CAL:PAR MAX. Measure the output current using the DVM.
Send CAL:DATA commands as needed (see PAR. 4.3a) until the DVM reading is as speci-
fied in Table 4-3 for +FULL SCALE CURRENT.
33.Save the calibration levels by sending CAL:SAVE 12/21/2003. The characters at the end
are optional and represent the calibration date of the power supply. The date entered in this
manner is reported in the *idn? query.
4.4 CALIBRATION USING FRONT PANEL KEYPAD IN LOCAL MODE
The following paragraphs describe the screens and keys used in the calibration process.
4.4.1 UNDERSTANDING THE CALIBRATION PROCESS
The following steps describe the calibration screens, and associated keys active during the cali-
bration process. Refer to PAR. 4.4.2 for full calibration procedure.
1. From the power-up screen, press % to enter the General Setup menu, then highlight Cali-
bration and press
!
.