8 Service and Maintenance
228 E364xA User’s and Service Guide
10 Run the OVP calibration
The above message is displayed to indicate that the calibration is in progress.
It takes approximately 10 seconds to complete the calibration. If the
calibration fails, an error message will be displayed for a second and you will
hear a beep, and then return to the OVP calibration mode again.
Current calibration
11 Select the low-end current calibration point.
12 Enter the computed value (DVM reading divided by the shunt resistance) by
using the knob and resolution selection keys. Notice that you should wait for
the DVM reading to stabilize for accurate calibration during the current
calibration.
13 Save the changes and select the middle current calibration point.
If the entered number is within an acceptable range, an ENTERED message
appears for a second. If the entered number is not correct, an error message
will be displayed for a second and you will hear a beep, and then return to the
low, middle, or high current calibration point again.
CALibrating
Connect an appropriate shunt 0.01 Ω across the output terminals, and connect a
digital voltmeter across the shunt resistor for the current calibration.
CURRENT CAL
I LO 0.2000
I LO 0.1900
I MI 1.5000
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