Keysight E3632A, Service Manual

Page: 44 / 73

1 Calibration Procedures
46 Keysight E3632A Service Guide
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 the Calibrate key saves the new calibration constants for OVP circuit
and goes to the current calibration mode.
CAL SETUP 3
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.
13 Select the low current calibration point.
I LO 0.2000 A
The display shows the low current calibration point.
14 Read the DVM and change the low current value on the display to match the
computed current (DVM reading divided by shunt resistance).
For example, if the computed value is 0.199 A, adjust the current to 0.199 A
using the knob and arrow keys.
I LO +0.1990 A
15 Pressing the Calibrate key saves the change and selects the middle current
calibration point.
NOTE
Connect an appropriate shunt (0.01 Ω ) across the output terminals, and connect
a digital voltmeter across the shunt resistor for the current calibration.
NOTE
Notice that you should wait for the DVM reading to stabilize for accurate
calibration.