3 Calibration Procedures
82 Keysight E3633A and E3634A Service Guide
10 Read the DVM and change the high voltage value on the display to match
the measured voltage.
For example, if the DVM reads 19.495 V, adjust the voltage to 19.495 V using
the knob and arrow keys.
11 Pressing (Calibrate) key saves the new voltage calibration constants,
and goes to the OVP calibration mode.
A “CALIBRATING” message appears for one second to indicate that the
voltage calibration is progressing and new voltage calibration constants of
“SETUP 1” are stored. Then, the display shows above message to indicate that
the power supply is ready for the OVP calibration.
If the calibration fails, a “DAC CAL FAIL” or “ADC CAL FAIL” message appears
for one second and the display shows the “CAL SETUP 1” for voltage
calibration again.
Current and OCP calibration
12 Pressing (Calibrate) key saves the new calibration constants for OVP
circuit and goes to the current calibration mode.
A “CALIBRATING” message appears for about several seconds to indicate that
the OVP calibration is progressing and new calibration constants of “SETUP 2”
are stored. Then, the display shows the above message to indicate that the
power supply is ready for the current calibration.
If the calibration fails, a “OVP CAL FAIL” message appears for one second and
the display shows the “CAL SETUP 2” for OVP calibration again.
V HI 19.495 V
CAL SETUP 2
CAL SETUP 3
Connect an appropriate shunt 0.01 Ω across the output terminals, and connect a
digital voltmeter across the shunt resistor for the current calibration.
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