Meter Calibration - Agilent Technologies E3620A Manual De Funcionamiento Y Servicio

ADJUSTMENT AND CALIBRATION
Current Limit Adjustment
To adjust the current limit circuit in the V1 or V2 supply, pro-
ceed as follows:
a. Turn the current limit adjustment pot (R63 for V1 supply
or R34 for V2 supply) to fully counter clockwise.
b. Connect the test setup shown in Figure A-6 to the output
of the supply to be adjusted. Substitute a short for R
leave load circuit switch open.
c. Turn on the supply and set the VOLTAGE control for max-
imum output(fully clockwise).
d. Close load switch and adjust the current limit pot (R63 or
R34) until the DVM indicates a voltage drop across the
shunt of 0.1 V + 5% (0.105 V).

Meter Calibration

Voltmeters. To calibrate voltmeter, proceed as follows:
a. Connect DVM across V1 + and - output terminal.
b. Turn on the supply and push V1 METER switch in.
c. Set the output voltage to 17.00 volts, and adjust R16 on
the display board until front panel VOLTS display reads
exactly DVM value. Next, set the output voltage to 25.0
volts and adjust R17 on the display board until front panel
VOLTS display reads exactly DVM value.
d. To calibrate the voltmeter for V2 output, push V2 METER
switch in and connect DVM across V2 + and - output ter-
minal.
e. Set the output voltage to 15.00 V and then adjust R81 on
the main board until front panel VOLTS display reads
exactly DVM value.
Ammeters. To calibrate ammeter for V1 and V2 supplies,
proceed as follows:
a. Connect the test setup shown in Figure A-6 to the output
of the V1 supply. Substitute a short for R
circuit switch open.
b. Push V1 METER switch in and turn V1 VOLTAGE control
fully clockwise.
c. Close the load switch and adjust R5 on the display board
until front panel AMPS display reads exactly DVM value
divided by R .
S
d. To calibrate the ammeter for V2 output, repeat step (a) to
the V2 supply. Select V2 METER switch and turn V2
VOLTAGE control fully clockwise.
e. Adjust R80 on the main board until front panel AMPS dis-
play reads exactly DVM value divided by Rs.
and
L
and leave load
L
A-11