GW Instek GDM-8245 - Beeper Test; Frequency Measurement Verification

GDM-8245 Service Manual
78
Verification
procedure
1. Set the range to 5V (DCV).
2. Input -4.9V DC. Verify the results.
3. Repeat for the remaining ranges and voltages.
DCV Verification (part 2) is complete
Beeper Test
Accepted range
>7Ω, buzzer off; <5Ω, buzzer on
Equipment
 Multimeter calibrator
 Test leads
Configurations
 GDM-8245: Beeper mode
 Calibrator: 5Ω, 7Ω
Verification
procedure
1. Set the mode to beeper.
2. Set the calibrator to 5Ω. Verify the beeper sounds.
3. Set the calibrator to 7Ω. Verify the beeper does not
sound.
Beeper verification is complete
Frequency Measurement Verification
Accepted range
200kHz ±2digits at 1.1V.
Equipment
 Multimeter calibrator
 Test leads
Configurations
 GDM-8245 range: AC+Hz mode
 Calibrator: 1.1V/200kHz