11/01/05

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ES51981

3 1/2 AUTO DMM

1.4 Continuity Check

Continuity check shares the same configuration with 200.0Ω manual resistance

measurement mode, but with buzzer output to indicate continuity. The buzzer generates a

2KHz sound whenever the digit number less than 25Ω. Because the cycle time of

measurement is only 50ms, the least significant digit will not display.

1.5 Diode Measurement

Diode measurement mode shares the same configuration with 2.000V manual voltage

measurement mode. If the test circuit is open or the voltage drop between the two ports

of the device (diode) under test is larger than 2V, the LCD panel will show “OL”. The

buzzer generates a 2KHz sound whenever the digit number is less than 0.25V. Because

the cycle time of measurement is only 50ms, the least significant digit will not display.