Continuity Test; Frequency Measurement - Innova 3340 El Manual Del Propietario

3. Press the SEL button, as necessar y, until the
shown on the display.
4. Place the RED test lead onto one side of the diode being
tested and the BLACK test lead onto the other side .
5. Read the results on the display.
6. Reverse the test leads and again read the results on the dis-
play. Compare the tw o readings. One reading should indi-
cate a voltage drop value; the other reading should indicate
an overrange (OL) condition. See note above .
D. CONTINUITY TEST
To avoid electric shock, shut off the power to the test arti-
cle before testing it for continuity.
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
position (see Controls and Indicators, Item 3).
3. Press the SEL button, as necessar y, until the
shown on the display.
4. Place the RED Test Lead to one end of the wire or de vice
being tested for continuity and the BLACK Test Lead to the
opposite end.
5. Listen to the sound of the beeper and confirm the results by
reading the display.
NOTE: The beeper will sound only if the continuity of the item
under test (resistance betw een the tw o test leads) measures
less than 120 ohms.
E. FREQUENCY MEASUREMENT
Frequency is the number of times that an event repeats itself during
a one-second time period. Frequency is measured in Her tz (Hz).
1. Plug the RED test lead into the "Hz" jack of the tester ; plug
the BLACK test lead into the " COM" jack.
2. Set the tester's Function/Range Selector Switch to the Hz
position (see Controls and Indicators, Item 4).
3. Place the RED test lead onto the signal output wire of the
sensor or circuit under test and the BLA CK test lead onto a
good chassis ground (consult the wiring diagram in the vehi-
cle's Service Manual for proper connections).
4. Read the results on the display.
WARNING
jack of the tester ; plug
icon is
icon is
12