Amprobe DM73C Digital-Multimeter - Manual (Page 8)

2
MEASURING PROCEDURES
Note: When connecting or disconnecting test leads to or from a
circuit, always first turn off power to the circuit under test and
discharge all capacitors.
DC / AC Voltage Measurement
Set the Function switch to “V”. Select AC or DC by pressing the
mode selector button (AC or DC is displayed). Connect the
instrument to the circuit and read the measured voltage in the
display.
Resistance Measurement
Set the Function switch to “ Ω ”. Connect the instrument across the
resistance and read the value in the display. When measuring high
resistance values, take care not to touch the test leads.
Continuity Measurement
Set the Function switch to Ω . Press the mode selector button once,
so that appears (
) in the LCD. Connect the instrument across the
device or wire to be tested. Beeper will sound when continuity is
established. The beeper also sounds when changing functions,
modes, or for Probe Hold.
Diode Measurement
Set the Function switch to Ω . Press the mode selector button twice,
so that appears (
) in the LCD. Connect the instrument across
the device to be tested. The forward voltage drop of a good diode is
about 0.6V. An open or reverse biased diode will read “OL”.
Data Hold
Push the HOLD button to “freeze” the measurement reading and
then remove the test leads while the reading remains displayed.
HOLD is useful when it is necessary to pay very close attention to
your work. Pushing the HOLD button again releases the display.