General Technologies TD101 SmarTach + D: Gas and Diesel Tachometer with Ignition Voltage Tester User Manual
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Note: When you insert the stereo jack plug into the
connector, the microprocessor in the SmarTach+ D
automatically switches into the diesel mode. This means
that settings needed for checking gasoline engines, such
the number of cylinders, are no longer required. Also,
operation of the PEAK button will be ignored.
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It follows that you must remove this jack plug before
using the unit to check gasoline engines.
5. Press the SmarTach+ button marked TACH. The screen
will display a rotating symbol with a number which will be
either a 2 or a 4 (these numbers refer to whether the diesel
is a 2-stroke or a 4-stroke) .
6. You must set these numbers correctly before taking RPM
readings. To change these cycle numbers, push the TACH
button again quickly while the rotating cycle symbol is
displayed. If the rotating symbol display has switched to
“0000” before you have made a correction , just press the
TACH button again to return to the cycle setting display.
7. After setting the cycles the display will switch to “0000”.
8. Locate the forked terminal at the end of the sensor wire
(near to the alligator ground clip) and push it under the flat
head of the connector pin at the corner of the piezo sensor
clamp. This connector pin is the one with a coil spring.
You will see that this spring presses a conical washer
against the flat pin head. The forked terminal must be
inserted between this washer and the flat pin head. Hook
up is now complete.
9. MAKE SURE THAT THE VEHICLE IS NOT IN GEAR AND
THAT THE EMERGENCY BRAKE IS SET. IF TESTING
IS BEING DONE INDOORS MAKE SURE THAT ALL
EXHAUST EMISSIONS ARE PIPED OUTSIDE. CHECK
THAT ALL PERSONNEL ARE CLEAR OF ROTATING
PARTS OR HOT AREAS.
10. You may now start the diesel engine.
11. Press the TACH button once briefly. Watch the screen to
confirm that the cycle setting is still correct. After showing
the cycle setting the screen will switch to showing engine
RPMs.
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The SmarTach+ D will continue to show RPMs as long as
pulses are being received from the piezo sensor.
The SmarTach+ D will switch off automatically if no signals
are received for one minute, for example, when the diesel
engine has stopped for more than one minute, or some fault in
the sensor system causes a loss of pulses for more than one
minute. To power up the SmarTach+ D again, just press the
TACH button.
NOTE: Incorrect setting of the “cycles” can result in RPM read-
ings that are half the correct speed or twice the correct speed
. When first setting up, listen to the diesel at idling speed
and compare with the RPM reading on the SmarTach+ D. If
the reading seems much too high or much too low, check the
“cycles” setting.
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