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Diagnostic Testing
The basic power up and operation can be verified with the display on the DSL-1E. The dot in the
upper left corner will be on steady when the unit is powered up and not getting a speed signal. The dot will
be flashing when a tach signal is present. When the key if first turned on, the display will show the current
CAL value for a few seconds. If both switches are pressed at the same time the current, incoming tach
signal frequency will be displayed. If the frequency displayed has a decimal point, then the reading is kHz,
otherwise the reading is Hz.
Both the input and outputs can be tested with special diagnostic modes.
To test the outputs and tachometer reading with the engine off:
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 "OUT" is shown.
5. Press and release the SET switch. The display will show the current cylinder count and provide a
2000 RPM signal on OUT1 and OUT2.
6. Press and release the SET switch to quit.
To test the input while driving:
1. Begin with the key off.
2. Press and hold the INC switch while turning the key on. The display will show "tSt".
3. Release the SET switch. The display will show "---".
4. Anytime either switch is pressed the display will update and hold the frequency. This can be done
to determine the type of signal being fed to the DSL-1. This information can be supplied to tech
support to assist in setup and configuration of the unit.
5. The unit will remain in this mode until the key is turned off.
Advanced Setup
Change input signal settings: These settings are set automatically when the setup mode is
selected. If needed, they can be manually changed. The signal type can be changed between low
voltage and high voltage signal types. The input pullup can be turned on or off.
sig:
Lo or HI
P-U:
on or oFF
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 "IN" is shown.
5. Press and release the SET switch. Press and release the INC switch to select "SIG", "P-U", or
"END".
6. Press and release the SET switch. Press and release the INC switch to change the setting, press
and release the SET switch to save it.
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