Chapter 3 Calibration Procedures
General Calibration/Adjustment Procedure
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17 Pressing the ‘‘Calibrate’’ key saves the chan ge and selects the high
current calibration point. (‘‘I HI 6.900 A’’ - E3634A model)
If the e ntered number is within an accepta ble range, an ‘‘ENTERED’’ messag e
appears for one second. If the entered number is not correct, an ‘‘MIN VALUE’’
or ‘‘MAX VALUE’’ message appears for one sec ond and the display shows the
middle current calibration point again. The display now shows the high current
calibration point
18 Read the DVM and change the high current value on the display to
match the computed current (DVM reading ¸ by shunt resistance).
For example, if the computed value is 19.499 A, adjust the current to 19.499 A
using the knob and arrow keys.
Notice that you should wait for the DV M reading to stabilize for accurate
calibration.
19 Pressing the ‘‘Calibrate’’ key saves the new calibration constants for
the output current and goes to the OCP calibration mode.
A ‘‘CALIBRATING’’ message appears for one second to indicate that the
current calibration is progressing and new c alibration constants of ‘‘SETUP 3’’
are stored. Then, the display shows the above message to indicate that the
power supply is ready for the OCP calibration.
If the calibration fails, an ‘‘DAC CAL FAIL’’ or ‘‘ADC CAL FAIL’’ message
appears for one second and the display shows t he ‘‘CAL SETUP 3’’ for current
calibration again.
I HI 19.500 A
(E3633A)
I HI 19.499 A
CAL SETUP 4
Error
Calibrate
Error
Calibrate
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