1. SAFE TY RULES
•
This instrument is designed for indoor use at temperatures
between 32°F to 122°F (0°C to 50°C), altitudes up to 6500 ft.
(2,000 m), and 10% to 90% relative humidity.
•
To ensure that the instrument is used safely, follow all safety and
operating instructions in this manual. If the instrument is not used
as described in this operation manual, the safety features of this
device may be impaired.
•
To avoid personal injuries and damage to the instrument, use
extreme caution when working around hot machine or engine
parts, such as radiators, exhaust manifolds, catalytic converters,
etc.
2. INTERNATIONAL SYMBOLS
Important information
Refer to the User’s Manual
3. TECHNICAL SPECIFICATIONS
3.1 General Specifi cations
Display:
LCD 4½ digit main measurement, number
of cycles, number of cylinders, and units.
Update rate:
3 updates per second
Ignition system comp.: All
Engine cycles:
2 and 4 cycles
Number of cylinders:
1,2,3,4,5,6,8,10 or 12
Engine type:
Internal combustion piston engines
equipped with an alternator
Input connector:
BNC jack
Cable and connectors: 79” (2 m) BNC cable with battery alligator
clips, 59” (1.5 m) BNC cable with cigarette
lighter connector and 118” (3 m) BNC
extension cable
Power:
9 to 42 Volt DC, 100 mA
Dimensions:
6.4” x 4.0” x 1.5” (160 x 100 x 37 mm)
Weight:
Approximately 9 oz. or 255 g
Included accessories:
Cables and connectors, padded hard
carrying case, user’s manual, and rubber
holster.
3.2 Measurement Specifi cations
•
Accuracies are ±(% of r number of least signifi cant digits)
at 23°C ±3°C (73°F ± 6°F) ambient temperature, with less than 75%
relative humidity.
Range
1
: 200 to 9999
RPM
Resolution: 1 RPM
Accuracy
2
: ± 0.5% + 2 LSD
Note 1: The minimum and maximum possible readings are a function
of the number of poles of the alternator, and the ratio between
the crankshaft and alternator speeds, and is typically 6000
RPM or higher.
Note 2: Accuracy is also dependent on the stability of the engine
and electrical noise at the time of calibration.
4. OPERATION
4.1 Instrument Description
1) BNC jack connector
2) Protective rubber holster
3) LCD display
4) Cylinder increase button
5) AUX button
6) Cylinder decrease button
7) Calibrate button
8) Engine Cycles button
4.2 Display Description
4.3 Adapter Cable Descriptions
!
Diesel & Gasoline Engine Tachometer
Calibrate
General
Technolog
ies
Corp.
Engine
Cycles
SmarTach
3
3
AUX
Cylinder
Cylinder
2 - 4
Instructions:
1- Connect terminals to engine’s alternator (battery, cigarette lighter, etc.)
2- Turn off all electrical accessories and turn on the headlights
3- Select number of cylinders and cycles for the engine
4- Press the ‘Calibrate’ button
Made in Canada
1
2
3
5
4
7
6
8
Number of cycles
Number of cylinders
Measurement reading
BNC plug connector
Battery alligator clips
Cigarette lighter connector
Battery cable
BNC plug connector
Extension cable
BNC plug connector
BNC jack connector
BNC cable with cigarette lighter connector
TA
303
