Agilent Technologies E3610A Manual Del Usuario página 61

an ac voltage superimposed on the dc output. Constant Current
PARD is specified as the root-mean-square(rms) output current in e
frequency range of 20 Hz to 20 MHz with the unit in CC operation.
PARD(RMS) Measurement
Test Parameter:
Measured Variable: Output Current(rms)
Expected Results: Less than 200 uA rms
Test Procedure:
a. Connect the test equipment as shown in Figure A-6.
b. Turn the unit's power on and turn the VOLTAGE control fully
clockwise.
c. Turn up output current to the full rated value. Check that the CC
indicator remains lighted. Reduce CURRENT control if not
lighted.
d. Record rms voltage across R
dividing by R .
s
e. Check that the rms noise current is no more than 200 uA.
PARD(Peak-to-Peak) Measurement
Test Parameter:
Measured Variable: Output Current(peak-to-peak)
Expected Results: Less than 1 mA p-p
Test Procedure:
a. Connect the test equipment as shown in Figure A-6, but
replace the RMS voltmeter with oscilloscope.
b. Set the oscilloscope to AC mode and bandwidth to 20 MHz.
c. Turn the unit's power on and turn the VOLTAGE control fully
clockwise.
d. Turn up output current to the full rated value. Check that the CC
indicator remains lighted. Reduce CURRENT control if not
lighted.
e. Record peak-to-peak voltage across R
rent through dividing by R
current is no more than 1 mA.
Figure A-6. RMS Measurement Test setup
and convert it to current through
s
and convert it to cur-
s
. Check that the peak-to-peak noise
s
CALIBRATION PROCEDURE
To calibrate ammeter and full scale current, connect test equipments
as shown in Figure A-7.
Figure A-7. Calibration in High Current Range
Calibration in High Current Range
a. Turn VOLTAGE and CURRENT control fully clockwise.
b. Set RANGE push button to high current range.
c. Turn on power supply and adjust R31 so that DVM indicates
exactly as follows (5% over rated current):
E3610A: 0.315 V
d. Adjust R3 on the display board so that the displayed value on
the front panel is equal to DVM value divided by R
e. While depressing CC SET push button, adjust R20 so that the
displayed value on the front panel is equal to DVM value
divided by R
Calibration in Low Current Range
a. Set RANGE push button to low current range.
b. Adjust R32 so that DVM indicates exactly as follows (5% over
rated current).
E3610A: 0.21 V
Calibration of VOLTS Meter
a. Disconnect the current shunt(R
put of supply.
b. Set RANGE push button to low current range at no load.
c. Adjust VOLTAGE control till DVM indicates exactly as follows
(full rated voltage):
E3610A: 15 V
d. Adjust R10 on the display board so that the value of the front
panel display is the same as the value of DVM.
A-5
E3611A: 0.158 V E3612A: 0.053 V
.
s
E3611A: 0.089 V E3612A: 0.026 V
) and connect DVM across out-
s
E3611A: 35 V E3612A: 120 V
.
s