6600 COUNTS DIGITAL MULTIMETER
USER'S MANUAL
16
3.2.3 Resistance measurement
To avoid electrical shock and/or damage to the
instrument, disconnect circuit power and discharge
all high-voltage capacitors before measuring
resistance.
Resistance is an opposition to current flow.
The unit of resistance is the ohm (
:
). The Meter measures
resistance by sending a small current through the circuit.
Because this current flows through all possible paths between
the probes, an in-circuit resistance reading represents the total
resistance of all paths between the probes.
To measure resistance (set up the Meter as shown in figure
3-3):
1. Set the rotary switch to
:
range.
2. Connect the black and red test leads to the COM and V
:
terminals respectively.
3. Connect the test leads tip to the circuit being measured.
4. Read the displayed value.
NOTE:
In case of performing resistance test on circuit board, it is
necessary firstly to turn off the power of the circuit board and
then perform the measurement. As there may be other parallel
circuits, so the displayed value of test is not surely the actual
value of the resistor.
A
mA
uA
C
¡ £
Hz
V
OFF
F
¡ £
COM
A
V
Hz
mA
uA
Figure 3-3 Measuring Resistance
