Calibrate
Chapter 3 Calibration Procedures
General Calibration/Adjustment Procedure
12Pressing 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.
13Select the low current calibration point.
Calibrate
i lo 0.200 a
The display shows the low current calibration point.
14Read the DVM and change the low current value on the display to match the computed current (DVM reading ¸ 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.
Notice that you should wait for the DVM reading to stabilize for accurate calibration.
i lo +0.199 a
15Pressing the "Calibrate" key saves the change and selects the middle current calibration point.
i mi 3.500 a
If the entered number is within an acceptable range, an "ENTERED" message appears for one second. If the entered number is not correct, an "MIN VALUE" or "MAX VALUE" message appears for one second and the display shows the low current calibration point again. The display now shows the middle current calibration point.
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