Diode Test - Innova 3340 El Manual Del Propietario

B. RESISTANCE MEASUREMENT Ω Ω (OHMS)
Resistance measurements must be made on "de-ener-
gized" (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 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 accur ate readings, disconnect at least one
side of the item under test from the circuit or circuit board bef o re
measuring resistance.
4. Place the RED test lead onto one side of the item being test-
ed 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.
NOTE: A diode is a semiconductor de vice that lets current flo w in
one direction only. If the diode to be tested is par t of a circuit
(with other electronic components), you must isolate it from the
other components by disconnecting at least one side of it from
the circuit before testing. A good diode will sho w a low voltage
drop across its junction (0.5-0.8 volts for a silicon diode or about
0.3V for a germanium diode) when the leads are connected in
one polarity and a v ery high resistance (or open circuit) when
the leads are reversed (connected in the opposite polar ity).
1. Plug the RED test lead into the
the BLACK test lead into the " COM" jack.
2. Set the tester's Function/Range Selector Switch to the
11
WARNING
position (see Controls and Indicators, Item 3).
WARNING
position (see Controls and Indicators, Item 3).
jack of the tester; plug