Urrea UD226 Manual De Usuario Y Garantía página 40

E N G L I S H
RED (+)
BLACK (-)
• Select the mS-Pulse range with the rotary
switch.
• Press the ± TRIG button for 2 seconds until
the negative (–) trigger slope is displayed
on the lower left side of the display.
NOTE:
The applied time for most fuel injectors is
dis-played on the negative (–) slope.
Inserte:
• Black lead in COM jack.
• Red lead in RPM, V, Ω jack.
Connect:
• Jumper wires between the fuel injector
and the harness connector.
• Black test probe to a good ground at the
fuel injector or the negative (–) vehicle
battery post.
• Red test probe to the fuel injector
solenoid driver input on the jumper cable.
Start the engine is too high or unstable,
adjust the trigger level pressing the ± TRIG
button repeatedly.
Dwell Measurements.
40
JUMP OR LEADS
FROM PORT FULL
INJECTOR
GOOD
GROUND
Dwell is the number of degrees of
distributor rotation where the points
remain closed. Dwell can be measured for
1, 2, 3, 4, 5, 6, 8 cylinder engines using the
Meter so you need to determine how many
cylinders are in the engine to measure
Dwell.
In the Dwell mode, the Meter defaults to
4 cylinders and the negative (–) slope so
DWL°, CYL, TRIG, and – appear on the
display. If you want to select the other
number of cylinder, press the CYL (RANGE)
button repeatedly to select the required
number of cylinders.
This exercise shows how to measure Dwell.
To measure Dwell:
• Select the mS-Pulse range with the rotary
switch.
• Press the HOLD (DWELL) button until
DWL°, CYL, TRIG, and – appear on the
display.
RED (+)
BLACK (-)
Insert:
• Black lead in COM jack.
• Red lead in RPM, V, Ω jack.
Connect:
BREAKER
POINTS
IGNITION
MODULE
GOOD
GROUND