MAN# 650530:A
3
FLYWHEEL TACH INTERFACE UNIT
SET
:
FLY
Convert a signal from a flywheel gear-tooth sensor to an ignition tachometer signal.
For using a standard 4-6-8 cylinder tachometer on a diesel engine, the DSL-1 E can
convert a flywheel sensor signal into a standard gas ignition signal. Calibration is
accomplished by determining the number of teeth on the flywheel or using another tachometer
as a reference. An inductive, gear-tooth sensor such as Dakota Digital, Inc. part # 620008
should be mounted so the teeth pass by the end of the sensor. The GROUND terminal on the
DSL-1 E should be connected to a good ground. The SIGNAL IN terminal will connect to one
terminal from the sensor and the SENSOR GND terminal will connect to the other. Connect
the POWER terminal to 12V accessory power. NORMAL terminal will provide the standard
signal to the tachometer. If your tachometer will not read from this then try the HI VOLT
terminal.
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DSL-1 E
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12V Accessory Power
GROUND
standard tach output
1/2 rate tach output
high voltage tach output
jumper to HI VOLT output for some
early Toyota tachometers
Gear tooth sensor
Calibration
Adjust with engine running: To increase the tachometer reading, press and hold the
+ push button switch. To decrease the tachometer reading, press and hold the - push button
switch.
Preset or adjust: The calibration value (tooth count) can be set from 32 – 254.
1. Begin with the key off.
2. Press and hold the SET switch while turning the key on. The display will show the current
version code.
3. Release the SET switch. The display will show “
SEt
”.
4. Press and release the INC switch until “
FLY
” is displayed, then press and release the SET
switch.
5. The display will show the hundreds digit of the currently stored calibration value. Press
and release the INC switch to set this from 0-2 for your desired calibration value.
6. Once finished press and release the SET switch to move to the tens digit. Press and
release the INC switch until your desired value is shown.
7. Press and release the SET switch to move to the ones digit. Press and release the INC
switch until your desired value is shown.
8. Press and release the SET switch to save the ones digit and finish.
9. The display should now show the next menu option, “
SIG
”. Turn the key off.
