Radio Shack 22-168A - Measuring Voltages

© If polarity is negative, — appears on the left
of display.
¢ For the most accurate measurement, select
the lowest possible voltage range without
getting an overload reading.
Measuring an AC Voltage
on a DC Bias
To measure an AC voltage superimposed on a
DC voltage source bias, follow the steps for mea-
suring AC voltage.
Caution: Never try to measure an AC voltage
that is riding on a DC voltage level where the
peak AC voltage exceeds 1000V with respect
to earth ground.
MEASURING 3-PHASE AC
VOLTAGES
We designed this meter to measure household
AC voltage. It is not intended for commercial or
industrial use. If you want to measure 3-phase,
line-to-line voltages, please note the following.
‘Waming: Because of the dangers inherent in
measuring three-phase circuits, we strongly re-
commend that you do not use this meter for such
applications.