11
Pulse Width Measurements
1.
Insert the black test lead banana plug into the negative
COM
jack and the red test lead banana
plug into the positive
+
jack.
2.
Turn the rotary switch to the
Pulse Width
position.
3.
Connect the back test probe to ground and connect the red test probe to the signal wire that
connects to the component to be measured
Note: the applied time for most fuel injectors is displayed on the negative (-) slope
RPM (TACH) Measurements
1.
Select the RPM range with the rotary switch
2.
Select the X10 RPM range with rotary switch (1,000 to 12,000 RPM). Multiply the displayed
reading times by ten to get actual RPM
3.
Press STROKE 4/2 (DIS) button toward select through RPM 4 for 4-stroke, RPM 2 For 2-stroke
and DIS The wire connection diagram pleases ref. Fig.4.
4.
Insert the inductive pickup connecting terminal into the meter
5.
Ground lead in COM terminal.
6.
Output lead in RPM terminal.
7.
Connect the inductive pickup to a spark plug wire. If no reading is received, unhook the clamp,
turn it over and connect again.
Note:
Position the inductive pick-up as far away from the distributor and the exhaust manifold
as possible.
Position the inductive pick-up to within six inches of the spark plug or move it to another
plug wire if no reading or an erratic reading is received
RPM4: For RPM of 4-stroke engines which have 1 ignition on every 4 engine strokes
RPM2: For RPM of DIS (Distributorless Ignition System) & 2-stroke engines which Have 1
ignition on every 2 engine strokes
DWELL ANGLE Measurement
1.
Insert the black test lead banana plug into the negative
COM
jack and the red test lead banana
plug into the positive
+
jack.
2.
Turn the rotary switch to the corresponding position of
4CYL, 5CYL, 6CYL, 8CYL
on the “DWELL”
range.
3.
Connect red test probe into “
breaker points
” or “
-
“terminal of battery.
4.
Crank engine. The display will show RPM reading.
