GW Instek GDM-8245 - Preparation

GDM-8245 Service Manual
50
Preparation
WARNING
Servicing should only be performed by a qualified
technician. Before performing calibration, read the Safety
Requirements and Precautions Before Use section. Failure
to do so may damage the instrument or result in injury or
death.
Note
In order to ensure performance accuracy, we recommend
that all the following items be performed in the order
recommended in this manual.
Calibration and
verification items
 Operating Voltage-
Verification
 LED brightness-
Verification
 Power Supply-
Verification
 ACV Frequency
Response- Verification &
Adjustment
 Resistance Range
Verification- Calibration
 Diode- Adjustment
 Capacitance- Adjustment
 DCA- Adjustment
 ACA- Adjustment
 DCV- Adjustment
 Resistance Ranges
Shorting- Verification
 Resistance Range-
Verification
 Diode- Verification
 Capacitance Short-
Verification
 Capacitance- Verification
 DCA Short- Verification
 DCA- Verification
 ACA- Verification
 ACV- Short Verification
 ACV- Verification
 AC+DC- Verification
 DCV Short- Verification
 DCV- Verification
 DCV- Verification (dB)
 Buzzer Test
 Frequency- Verification
(AC+Hz)
When to Run
Calibration and
Verification
 When using the instrument in a new environment
 After replacing one of the major internal modules,
such as the front panel or instrument PCB
 To check whether the instrument is malfunctioning
or not