Measuring Resistance - Radio Shack 22-178 Owner's Manual

22-178.fm Page 28 Friday, August 6, 1999 11:38 AM

MEASURING RESISTANCE

The resistance-measuring circuit compares the voltage
gained through a known resistance (internal) with the
voltage developed across an unknown resistance.
1. Remove all power from the circuit under test and dis-
charge all capacitors.
2. Set the selector to
Caution: NEVER CONNECT THE PROBES TO A
SOURCE OF VOLTAGE while the selector is set to
.
W
Note: With no resistance connected across the test
leads (resistance infinite),
the display when you set the selector to
normal.
3. Plug the red test lead into the
and the black lead into the
4. Connect the probes across the circuit or component
you want to measure.
5. The meter automatically moves to the proper range.
If you select manual range control, press
change the range.
28
.
W
OL. (overload) appears on
V •W• •m A • mA •
jack.
COM
. This is
W
jack
to
RANGE