Innova 3340 Manuel Du Propriétaire page 14

F. PULSE WIDTH MEASUREMENT
Pulse Width is the length of time that a solenoid or actuator is
energized ("ON" time) during a one-cycle time per iod. Pulse
Width is measured in milliseconds (ms).
1. Plug the RED test lead into the "ms" jack of the tester; plug
the BLACK test lead into the " COM" jack.
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 BLA CK test lead onto a
good chassis g round (consult the wir ing 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 per iod. Duty
Cycle is measured in percent (%).
1. Plug the RED test lead into the
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 BLA CK test lead onto a good
chassis ground (consult the wir ing diagram in the v ehicle's
Service Manual for proper connections).
4. Read the results on the display.
H. TEMPERATURE MEASUREMENT
To avoid fire and/or electr ical shock hazards, DO NOT con-
nect the thermocouples to circuits greater than 30 Vrms, 42.4
Vpk or 60 Vdc.
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.
13
WARNING
jack of the tester ;