Radio Shack 22-168A Owner's Manual page 35

Manual dual-display digital multimeter
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USING THE RELATIVE
MEASUREMENT FEATURE
70g
The relative measurement feature lets you mea-
sure values relative to a' reference value that you
set. For example, you can set a reference voltage
and then measure the difference between the
actual voltage and the reference voltage. Follow
these steps to set a reference value.
1. Repeatedly press
FUNCTION
until REL ap-
pears at the top of the display.
2. Press UP or DOWN to set the reference value's
polarity.
(— appears
for negative values.)
Press SET/RESET.
3. Press UP or DOWN to set the reference value's
first digit. Press SET/RESET.
Note: The first digit can be either 1 or nothing.
© does not appear on the display for the first
digit.
Repeat Step 3 for the other three digits. After you
enter the last digit, the meter begins making rela-
tive measurements. The main display shows the
actual
measurement.
The
secondary
display
shows
the difference between
the measured
value and the reference value.
35

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