64 U8001A/U8002A User’s and Service Guide
5Service Guide
Current Calibration
For current calibration, connect an appropriate shunt 0.01 Ω
across the output terminals, and connect a digital voltmeter
(DVM) across the shunt resistor. Same as voltage calibration,
you will also be calibrating for low current, middle current and
high current calibration point respectively. Make sure that the
power supply is in constant current (CC) mode along the
current calibration.
1 Current Calibration mode
• Display will show "C" blinking.
• The CC annunciator will be turned on.
• Ensure that the power supply is in CC mode. Otherwise
the CV annunciator will fast- blink.
2 Low current calibration point.
• Display will show "C" blinking.
• The M1 annunciator will be turned on.
• Use the knob to enter the computed value (DVM reading
divided by shunt resistance).
• Press the "Memory" button to save the changes and move
to the next calibration point. You will be able to perform
this if the power supply is in CC mode.
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