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2.
SPECIFICATION
No wires, no cables and no fragile antennae - simply clamps around HT lead. Ideal for setting
engine idle speed. Shows engine speed on large LCD display. Includes hold function. Reads
RPM on DIS/2-stroke and 4-stroke engines. Powered by 9V cell (not included).
4-Stroke: . . . . . . . . . . . . . . . . .600–12000rpm.
DIS/2-Stroke: . . . . . . . . . . . . . .300–6000rpm.
Jaw Opening: . . . . . . . . . . . . .16mm.
Battery: . . . . . . . . . . . . . . . . . .1 x 9V.
Ranges (RPM4): . . . . . . . . . . .600-2000, 2000-12000(x10RPM).
Ranges (RPM2/DIS): . . . . . . . .300-2000, 2000-6000(x10RPM).
Resolution: . . . . . . . . . . . . . . .1RPM.
Effect Reading: . . . . . . . . . . . .>600RPM for RPM4, >300RPM for RPM2/DIS.
Accuracy: . . . . . . . . . . . . . . . .± 2.0% + 5.
Display: . . . . . . . . . . . . . . . . . .1999 counts LCD with battery indication.
Overange Indication: . . . . . . . .'1'shown on display.
Low Battery Indication: . . . . . .'
' shown on display.
Measurement Rare: . . . . . . . . .2.5 times per second nominal.
Storage Temperature: . . . . . . .-10°C - 50°C at <80%RH.
Power: . . . . . . . . . . . . . . . . . .Single 9V battery.
3.
DESCRIPTION
2
1
1.
Inductive pickup. RPM measurement for automotive engines up to 8 cylinders.
2.
LCD display.
3.
Data hold.
a. Press data hold once to hold the current reading.
b. Press the data hold again to exit and resume reading.
4.
Power/function/range switch. Turns power on or off and selects measurement
function and range.
3
4
2
SWITCH POSITIONS (FIG.1).
1. 'OFF'
2. x10 (Stroke (4) RPM): For RPM of 4-stroke engines which have 1 ignition on every 2
revolutions.
3. x1 (Stroke (4) RPM): For RPM of 4-stroke engines which have 1 ignition on every 2
revolutions.
4. x10 (Stroke (2) RPM): For RPM of DIS (Distributor-less Ignition System) and 2 -stroke
engines which have 1 ignition on every 1 revolution.
5. x1 (Stroke (2) RPM): For RPM of DIS (Distributor-less Ignition System) and 2 -stroke
engines which have 1 ignition on every 1 revolution.
6. 'HOLD' button.
4.
OPERATION
4.1. Select a suitable RPM range with the function switch (see
switch positions above).
" WARNING! Potential Shock Hazard:
HT leads produce high voltages. If the leads appear worn or
cracked; replace them. Avoid inadvertently touching the
leads. Turn engine off before connecting or removing the
inductive pickup.
4.2. Clamp the inductive pickup over a spark plug HT lead and
start the vehicle, If no reading is observed, stop the vehicle,
unhook the clamp, turn it over and connect again. Re-start
the vehicle and check reading.
Note: Position the pickup to within six inches of the spark plug or
move it to another plug HT lead if no reading or an erratic reading
is obtained.
4.3. If the '
' symbol appears, the battery should be replaced.
Remove the screw on the battery cover. Replace the battery
and reinstall the battery cover and screw.
FIG.1
HT LEAD
3
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