Matco Tools ADMM50 Operating Instructions Manual page 12

1.
Plug the BLACK test lead into "COM" jack of the tester; plug
the RED test lead into the "V" jack.
NOTE: If alligator clip adapters (not included with tester) are to
be used on the test leads, use suitable rated and UL certified
alligator clips.
2.
Set the tester's Function/Range Selector Switch to the
appropriate
Controls and Indicators, Items 1 and 2).
3.
Place the RED test lead onto the positive (+) side of the
item being tested and the BLACK test lead onto the
negative (-) (across the source/load) side of the item. BE
CAREFUL not to touch any energized conductors with
any part of your body.
4.
Read the results on the display.
B. RESISTANCE MEASUREMENT Ω (OHMS)
Resistance measurements must be made on "de-
energized" (dead) circuits ONLY. Impressing a voltage
across the multimeter's terminals while set to any
resistance range may result in electric shock, instrument
damage and/or damage to equipment under test. MAKE
SURE equipment is completely de-energized before taking
any resistance measurements.
1.
Plug the RED test lead into the "Ω" jack of the tester; plug
the BLACK test lead into the "COM" jack.
2.
Set the tester's Function/Range Selector Switch to the
3.
Press the SEL button, as necessary, until the (AUTO) icon
is shown on the display.
NOTE: To obtain accurate readings, disconnect at least one side
of the item under test from the circuit or circuit board before
measuring resistance.
4.
Place the RED test lead onto one side of the item being
tested and the BLACK test lead onto the other side of the
item. (Polarity does not matter when checking resistance).
5.
Read the results on the display.
C. DIODE TEST
To avoid electrical shock and/or damage to the multimeter,
ensure the power is removed from the circuit before any
DIODE testing procedure is conducted. Test diodes on de-
energized (dead) circuits only, never on live circuits.
11
DCV or
position (see Controls and Indicators, Item 3).
ACV position as desired (see
WARNING
WARNING