Ver 2.7

9

07/10/03

ES51925

3000 Counts Smart DMM

1.3 Resistance Measurement

A re-configurable divider automatically provides a suitable full-scale range in

resistance measurement mode. The following table summarizes the full-scale

ranges and the reference resistors in each configuration.

Configuration

Full Scale Range

Relative Resistor

Equivalent value

OR1

300.0Ω*OR1

100Ω

OR2

3.000KΩ

VR5

1KΩ

OR3

30.00KΩ

VR4

10KΩ

OR4

300.0KΩ

VR3‖VR1

100KΩ

OR5

3.000MΩ

VR2‖VR1

1MΩ

OR6

30.00MΩ**

VR1

10MΩ

Note: * When auto scan mode is set, continuity check is implemented in this range

** When auto scan mode is set, the 30.00MΩ range is omitted

1.3.1 Continuity check

Continuity check shares the same configuration with 300.0Ω manual resistance

measurement mode and has buzzer output to indicate continuity. The buzzer

generates 2KHz beep whenever the reading is less than 30Ω.

1.4 Diode Measurement

Diode measurement mode shares the same configuration with 3.000V manual

voltage measurement mode and has buzzer output to indicate continuity. The

buzzer generates a 2KHz sound whenever the reading is less than 30mV. 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”.