Digital to Analog V8 Tachometer Driver
3
Diagnostic Testing
The basic power up and operation can be verified with the display on the
SGI-8E. The dot in the upper left corner will be on steady when the unit is
powered up and not getting a tachometer signal. The dot will be flashing when
a tachometer signal is present. When the key if first turned on, the display will
show the current fine adjust CAL value for a few seconds. If both switches are
pressed at the same time the current, incoming speed 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 “IN”.
4.
Press and release the INC switch until “OUT” is shown.
5.
Press and release the SET switch. The display will show the current
gauge cylinder setting and be supplying a 2000 RPM signal.
6.
Press and release the INC switch until the gauge reading is close to
2000 RPM. 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 SGI-8. 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.
Summary of Contents for Digital to Analog V8 Tachometer Driver
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