Lingenfelter NCC-001, Installation And Operating Instructions Manual

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Setup Menu 94
Access from the Computer Program:
From the Status screen , press the "Timer" button. The "Output RPM Off" option is found in the "RPM Based
Setup" dialog box under the "Options" Tab. Click the "UP" and "DOWN" arrow buttons or type in any numeric
value in the valid ranges shown above.
RPM Hysteresis Percentage
This setting controls the percentage of hysteresis for the engine RPM if the timer is setup as a RPM window
switch controlled output. The hysteresis percentage is based off of the full scale range (16000 RPM). For
example, you set the RPM On to 4000 and the RPM Off to 8000. The following chart shows the effect of a 1%
hysteresis on those values (1% of 16000 = 160 RPM):
Hysteresis RPM On Setting = 4000 RPM Off setting = 8000
0% ON at 4000 RPM OFF at 4000 RPM OFF at 8000 RPM ON at 8000 RPM
1% ON at 4000 RPM OFF at 3840 RPM OFF at 8000 RPM ON at 7840 RPM
In the above example with a 0% hysteresis, as the engine RPM rises above 4000 RPM, the Timer Output is turned
on. Then, when engine speed exceeds 8000 RPM, the Timer Output is turned off. As the engine RPM drops, the
Timer Output is turned on when the engine speed drops below 8000 RPM and is then turned off when the engine
speed drops below 4000 RPM. With a 1% hysteresis, the values would be the same when the engine speed is
increasing, but as the engine RPM drops, the Timer Output is turned on when the engine speed drops below 7840
RPM and is turned off when the engine speed drops below 3840 RPM.
For more information on hysteresis values, refer to
Appendix D: Glossary of Terms .
The valid range is 0.0-5.0 in 0.1% increments.
Access from the Controller:
From the Main screen press the “SETUP” button and then press the “ENTER” button. Press the "DOWN" button
continuously until the "Timer Setup Menu" is selected, then press "ENTER". Press the "DOWN" button
continuously until the "RPM Hysteresis%" setting is highlighted, then press "ENTER". Using the “LEFT” and
”RIGHT” arrow buttons, adjust the setting. Press the “SAVE” button to accept the new setting or press the “ESC”
button to exit with no change.
Access from the Computer Program: