Digital Multimeter (DMM) Basic Requirements: Notes
Service information is validated using digital multimeters that meet or exceed the following requirements. Using a multimeter that does not meet these basic requirements may give inaccurate readings which could lead to an incorrect diagnosis.
Display and Settings
- Four digits displayed
- Voltage, current, resistance, frequency, diode test settings, and min-max function
- Display positive and negative values
Voltage
- Have at least 10 MΩ input impedance
- Test a DC voltage range of 0.1-1000 V.
- Test an AC voltage range of 0.1-1000 V.
Current
- Test a DC current range of 0.1 μA-10 A.
- Test an AC current range of 0.1 μA-10 A.