GW Instek GDM-8245 - DCA Calibration

GDM-8245 Service Manual
64
DCA Calibration
Accepted range
0±3 digits (all ranges)
Equipment
 Multimeter calibrator
 Test leads
Configurations
 GDM-8245: 500uA, 5.0mA, 50mA, 500mA, 2A, 20A
 Calibrator: 400uA, 4.0mA, 40mA, 400mA, 2A, 8A
≤2A
<20A
Verification
procedure
1. Enter CL50 Calibration mode.
Note
Ensure the correct current terminal is used for each
range.
2. Set the DMM to DCA mode. Press DCA. Ensure the
range is set to 500uA.
3. Input 400uA.
4. Check the DMM display. If the current is within
specification, go to the next calibration range.
Range: 400uA±3 digits
5. Press Auto/Man to re-calibrate the range. The mode
will change to CL51. Press Auto/Man again to save
when the calibration has settled. The mode will return
to CL50.
6. Repeat steps 2 to 6 for the following inputs and ranges.
Range
Input
Specification
5mA
4mA
4mA±3
50mA
40mA
40mA±3
500mA
400mA
400mA±3