KEPCO KLP 10-150-2, User Manual

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4-2
KLP 070312
4.3 CALIBRATION USING FRONT PANEL CONTROLS IN LOCAL MODE
For voltage calibration all loads must be disconnected and the sense terminals connected to the
corresponding output terminals. The digital voltmeter will be connected to the output of the
power supply. For current calibration after disconnecting all loads an appropriate shunt resistor
will be connected across the output terminals and the digital voltmeter will be connected across
the sense terminals of the shunt resistor.
1. Turn off power supply and disconnect load from output terminals at the rear of the unit.
2. Verify that power supply is configured for local error sensing (PAR. 2.7.5.1).
3. For voltage calibration connect DVM to (M+, S+) and (M-, S-) of terminal block at the rear of
power supply.
4. For current calibration connect an appropriate shunt resistor (see PAR 4.2) across the output
terminals and connect DVM to shunt resistor terminals.
5. Turn on power supply, exit SET mode by tapping either VOLTAGE or CURRENT control and
using a thin tool (e.g., a paper clip), press the FUNCTION switch once until the status display
reads
VIRT
, then rotate either the VOLTAGE or CURRENT control in either direction until
status display reads
UTIL
.
6. Tap the DC OUTPUT switch once, then rotate either the VOLTAGE or CURRENT control in
either direction until status display reads
CAL
. The last calibration date is displayed (see
PAR. 4.3.4 for details) and the DC AMPERES display reads 0000 with the left-most digit
blinking.
7. Tap DC OUTPUT switch to enter calibration mode. The status display shows
PASS
. Enter
the password (see PAR. 3.2.7) and tap DC OUTPUT switch to accept the number.
8. When the password is accepted, status display reads
V ?
. Tapping either VOLTAGE or
CURRENT control continuously cycles through all the calibration choices. The status display
reads:
V ?
for voltage calibration
C ?
for current calibration,
EXT?
for remote analog cali-
bration, and
EXIT
to save the calibrated results. Tap the FUNCTION switch to exit calibra-
tion WITHOUT saving any calibration data (see PAR. 4.3.4). Tap the DC OUTPUT switch to
select the displayed choice.
NOTE: Calibrations may be done in any order.
9. Proceed to PAR. 4.3.1 for voltage calibration, PAR 4.3.2 for current calibration, PAR. 4.3.3
for external calibration or PAR. 4.3.4 to exit calibration
4.3.1 VOLTAGE CALIBRATION (LOCAL)
During voltage calibration, the voltage, voltage readback and remote analog voltage readback
are calibrated.
1. Minimum voltage is first. To start, tap the DC OUTPUT switch while
V?
appears in the status
display: the status display then reads
V_0
. Monitor DVM and rotate the VOLTAGE control to
increase or decrease the output voltage until the DVM reads minimum positive or zero Volts.
2. Tap the DC OUTPUT switch to accept the value. The status display then reads
VMAX
. Moni-
tor DVM and rotate the VOLTAGE control to increase or decrease the output voltage until