Equus 3340 - Automotive DMM (10 MegOhm / UL) User Manual
Page 14
2.
Set the tester’s Function/Range Selector Switch to the ms
position (see Controls and Indicators, Item 5).
3.
Place the RED test lead onto the signal output wire of the
sensor or circuit under test and the BLACK test lead onto a
good chassis ground (consult the wiring diagram in the
vehicle’s Service Manual for proper connections).
4.
Read the results on the display.
G. DUTY CYCLE MEASUREMENT
Duty Cycle is the percentage of time that a solenoid or actuator
is energized (“ON” time) during a one-cycle time period. Duty
Cycle is measured in percent (%).
1.
Plug the RED test lead into the
jack of the tester;
plug the BLACK test lead into the "COM" jack.
2.
Set the tester’s Function/Range Selector Switch to the
DUTY% position (see Controls and Indicators, Item 6).
3.
Place the RED test lead onto the signal wire of the sensor
or circuit under test and the BLACK test lead onto a good
chassis ground (consult the wiring diagram in the vehicle’s
Service Manual for proper connections).
4.
Read the results on the display.
H. TEMPERATURE MEASUREMENT
NOTE: Temperature measurement requires use of an optional
“K-type” thermocouple.
1.
Plug the Positive (+) test lead of the “K-type” thermocouple
into the °C / °F jack of the tester; plug the Negative (-) test
lead into the “15A” jack.
2.
Set the tester’s Function/Range Selector Switch to the °C or
°F position, as desired (see Controls and Indicators, Items 7
and 8).
3.
Read the results on the display.
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WARNING
To avoid fire and/or electrical shock hazards, DO NOT con-
nect the thermocouples to circuits greater than 30 Vrms, 42.4
Vpk or 60 Vdc.