GW Instek GDM-8245 - DCV Verification (Short); DCV Verification (Part 1)

GDM-8245 Service Manual
76
Verification
procedure
1. Set the range to 5V (GDM-8245).
2. Input 4.9V/20Hz. Verify the results.
3. Repeat for the remaining ranges and frequencies.
Note
There is no adjustment point for the 1kV range.
However, the 1kV/50Hz range can be downward
calibrated. After the downward calibration, the 1kHz
frequency can then be tested again.
ACV verification (Part 2) is complete
DCV Verification (Short)
Accepted range
1000V ± 7 digits, all other ranges ± 3 digits
Equipment
 Test leads
Configurations
 GDM-8245 range: 500mV, 5V, 50V, 500V, 1000V
Verification
procedure
1. Set the range to 500mV (DC mV).
2. Short the terminals. Verify the results.
3. Repeat for the remaining ranges (DCV mode).
DCV Verification (short) is complete
DCV Verification (Part 1)
Accepted range
(Digits): +490mV±14, -490mV±14, 4.9V±14
Equipment
 Multimeter calibrator
 Test leads
Configurations
 GDM-8245: 500mV, 5V
 Calibrator: -490mV, +490mV, 4.9V