Basic Digital Multimeter Requirements
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Basic Digital Multimeter Requirements
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Digital Multimeter (DMM) Basic Requirements
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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
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2.
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Voltage, amperage, resistance, frequency, diode test settings, and min-max function
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3.
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Display positive and negative values
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Voltage
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1.
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Have at least 10 MΩ input impedance
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2.
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Test a DC voltage range of 0.1-1000 V.
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3.
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Test an AC voltage range of 0.1-1000 V.
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Amperage
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1.
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Test a DC amperage range of 0.1µA-10 A.
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2.
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Test an AC amperage range of 0.1µA-10 A.
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Resistance
Test a resistance range of 0.1 Ω-40 MΩ and displays infinite for a value greater than 40 MΩ (O.L. (Over-load))
Frequency
Test for a frequency range of 0.5 HZ-199 K HZ
Diode Test
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1.
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Apply at least 1 mA when performing the diode bias test
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2.
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Display the break over voltage drop (0-3 V) of a forward biased diode
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3.
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Display infinite (O.L. (Over-load)) when a diode is reverse biased
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Min-Max Readings
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1.
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Can update at a 1 ms sample rate
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2.
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Saves and displays minimum and maximum values
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