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10
Using the Multimeter
3. Use the screw to secure the
ammeter to the multimeter, then
put the top cover you removed in
Step 1 in a safe place.
ZERO ADJUSTMENT
If the needle does not normally rest
exactly over 0 on the left side of the
ACVA/DCVA
scale, use a flat screw-
driver to adjust the plastic screw on
the center of the multimeter’s face to
set the needle to 0.
ˆ
Using the Multimeter
WARNING:
DO NOT TRY TO MEA-
SURE ANY VOLTAGE GREATER
THAN 500 VOLTS DC/500 VOLTS
RMS AC.
Caution:
When the multimeter is not
in use, always leave the function se-
lector set to
OFF
.
To use the multimeter, use the func-
tion selector to switch between the
multimeter’s functions. Then connect
the test leads to the circuit you want
to measure.
MAKING
MEASUREMENTS
For the most accurate readings, the
temperature should be between 43
°
F
and 74
°
F (6
°
C and 23
°
C), with a max-
imum of 80% relative humidity.
Keep the multimeter lying flat on a
non-metallic surface. Also, use a
range setting that results in a reading
in the upper third of the multimeter’s
scale.
For exact readings, look at the scale
from an angle where the needle and
its reflection in the mirror come to-
gether.
Caution:
Be sure to select the correct
function before you touch the test
leads to the circuit or component to
be tested.
O
H
M
S