Checking Continuity - Radio Shack 22-178 Owner's Manual

22-178.fm Page 29 Friday, August 6, 1999 11:38 AM
Caution: The meter has a circuit to protect the resistance
range from over-voltage (450 volts RMS AC, 1 minute).
However, to prevent accidentally exceeding the protec-
tion circuit's rating and to ensure a correct measurement,
NEVER CONNECT THE PROBES TO A SOURCE OF
VOLTAGE when you set the selector to
Notes:
• When you short the test leads, the meter displays a
small value (less than 0.7 ohms). This is due to the
meter's and test lead's internal resistance. You might
need to take note of this value and subtract it from
the measured value when you measure a very small
resistance.
• For resistance of about 1 megohm and above, the
display might take a few seconds to stabilize. This is
normal for high-resistance readings.

CHECKING CONTINUITY

This measurement helps you check electrical circuits,
such as house wiring or a speaker cable, for short or
open circuits.
1. Set the selector to
sets to 320 ohms.
.
W
. The range automatically
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