KEPCO BOP-MG, Operator'S Manual

Page: 146 / 194

4-14
BOP-1K 031912
16.Refer to Figure 4-2 to connect the C terminals of the Kelvin type sense resistor to the BOP
and connect the DVM to the P (probe) terminals of the sense resistor ((LO terminal of DVM
to common P terminal). Table 4-4 provides recommended sense resistor values for various
BOP current outputs, as well as the formula for calculating expected measured values and
tolerances for any sense resistor other than those recommended. Table 4-2 lists Kepco and
Manufacturer part numbers for those sense resistors recommended.
The sense resistor will be dissipating full rated current of the BOP. If
it is hot to the touch, the sense resistor value, power rating and/or
cooling are incorrect; refer to PAR. 4.4 and Table 4-2.
17.Press
@
- CURRENT,
!
- INTERNAL,
!
- ZERO to set the BOP to zero volts across the
sense resistor (corresponding to zero current). Adjust as needed until the reading is as close
to zero as possible within the limits specified in Table 4-4 for CURRENT ZERO. Press
%
once.
18.Press
@
- POSITIVE to set the BOP to maximum positive output current. Measure the cur-
rent by reading the voltage across the sense resistor. Adjust as needed 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. Press
%
once.
19.Press
#
- NEGATIVE to set the BOP to maximum negative output current. Continue to
measure the output current of the supply using the DVM connected to the sense resistor.
Adjust as needed 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. Press
%
twice.
20.Press
$
- PROTECT,
@
- POSITIVE to set to adjust the maximum positive current protec-
tion limit of the power supply in voltage mode. Adjust as needed until the DVM reads as
close as possible above the nominal full scale value within tolerance specified in Table 4-4
for +FULL SCALE CPR LIMIT. Press
%
once.
21.Press
#
- NEGATIVE to adjust the minimum (maximum negative) current protection limit of
the power supply. Adjust as needed until the DVM reads as close as possible above the
nominal full scale value within tolerance specified in Table 4-4 for –FULL SCALE CPR LIMIT.
Press
%
twice.
22.Connect a +0V ±0.1mV d-c reference voltage to external reference, A2A5J6 pin 11, refer-
enced to pin 10 (SGND) of the BOP analog I/O port.
23.Press
#
- EXTERNAL,
!
- ZERO to set the BOP to zero volts across the sense resistor
(corresponding to zero current). Adjust as needed until the DVM reads as close to zero as
possible within the limits specified in Table 4-4 for CURRENT ZERO. Press
%
twice.
24.Press
@
- GAIN,
!
- ZERO to set the BOP to zero volts across the sense resistor (corre-
sponding to zero current). Adjust as needed until the DVM reads as close to zero as possible
within the limits specified in Table 4-4 for CURRENT ZERO. Press
%
twice.
25.C10.0V ±0.1mV d-c reference voltage from the external voltage source to External
reference, pin 11, referenced to pin 10 (SGND) of the BOP Analog I/O Port connector
(A2A5J6), Press
@
- GAIN,
@
- POSITIVE. Measure the current by reading the voltage
across the sense resistor. Adjust as needed until the DVM reads as close to zero as possible
within the limits specified in Table 4-4 for CURRENT ZERO. Press
%
twice.
WARNING