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7. Connect a 0V ±0.1mV d-c reference to pin 11 (EXT_REF) referenced to pin 4 (SGND) of the
Analog I/O Port connector (A2A5J6). Set the BOP to zero volts output by sending CAL:VEXT
ZERO. Connect the DVM to the BOP output and send CAL:DATA commands as needed (see
PAR. 4.3c) to adjust the BOP output until the DVM reads as close to zero as possible within
tolerance specified in Table 4-3 for VOLTAGE ZERO.
NOTE: Accuracy of the 10V d-c reference must be ±0.1mV in order for the calibrated unit to
meet published specifications.
8. Replace 0V reference at pin 11 (EXT_REF) of the Analog I/O Port connector (A2A5J6) with a
+10V d-c reference. Set the BOP to maximum positive output voltage by sending CAL:VEXT
MAX. Measure the voltage output using the DVM. To adjust, send CAL:DATA commands as
needed (see PAR. 4.3b) until the DVM reading is as close as possible above the nominal full
scale value within the tolerance specified in Table 4-3 for +FULL SCALE VOLTAGE.
9. Replace +10V reference at pin 11 (EXT_REF) of the Analog I/O Port connector (A2A5J6)
with a 0V ±0.1mV d-c reference. Set the BOP to zero volts output by sending CAL:VGA
ZERO. Connect DVM to the BOP OUT S and OUT COM terminals to measure the output volt-
age. Send CAL:DATA commands as needed (see PAR. 4.3c) to adjust the BOP output until
the DVM reads as close to zero as possible within tolerance specified in Table 4-3 for VOLT-
AGE ZERO.
10.Replace 0V reference at pin 11 (EXT_REF) of the Analog I/O Port connector (A2A5J6) with a
+10V d-c reference. Set the BOP to maximum positive output voltage by sending CAL:VGA
MAX. Measure the output voltage using the DVM. To adjust, send CAL:DATA commands as
needed (see PAR. 4.3b) until the DVM reading is as close to zero as possible within toler-
ance specified in Table 4-3 for VOLTAGE ZERO.
11. Set the BOP to zero volts output by sending CAL:VLIM ZERO. Disconnect the +10V d-c ref-
erence voltage from the analog I/O port external reference pin (A2A5J6 pin 11) of the BOP,
then connect 0V ±0.1mV d-c reference voltage from the external voltage source to
VLIM+_EXTERNAL and VLIM–_EXTERNAL (pins 14 and 6) referenced to pin 12 (GND1) of
the BOP analog I/O connector (A2A5J6), then send the CAL:ZERO command. This enables
the BOP to recognize that the voltage at the VLIM_EXTERNAL pins is 0V.
12.Connect +10.0V ±0.1mV d-c reference voltage from the external voltage source to
VLIM+_EXTERNAL and VLIM-_EXTERNAL (pins 14 and 6) referenced to pin 12 (GND1) of
the BOP analog I/O connector (A2A5J6), then send CAL:VLIM MAX, then CAL:ZERO com-
mands. This enables the BOP to recognize that the voltage at the VLIM+_EXTERNAL pin is
10.0V.
13.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.
14.Connect a 0V ±0.1mV d-c reference to pin 8 (S_IN_SERIAL) of the PAR/SER CONTROL IN
connector (A2A5J3) referenced to COM S terminal at the rear panel (use mating connector
supplied with the unit, P/N 142-0488 to gain access to PAR/SER CONTROL IN connector
pins). Set the BOP to zero volts output by sending CAL:SER ZERO. Connect the DVM to the
BOP OUT S and OUT COM terminals and send CAL:DATA commands as needed (see PAR.
4.3b) to adjust the BOP output until the DVM reads as close to zero as possible within toler-
ance specified in Table 4-3 for VOLTAGE ZERO.
NOTE: Accuracy of the 10V d-c reference must be ±0.1mV in order for the calibrated unit to
meet published specifications.
BOP-1K 080709
4-7
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