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Tank alarms
An alarm can be raised for each tank if the tank level goes above
or below a specified level. Turn the alarm on or off by pressing
the Turn Alarm on/off menu key.
When the alarm is turned on, you can set the level at which the
alarm is sounded. For fuel and water tanks, the alarm sounds
when the level stays consistently below the specified limit. For
the waste tank, the alarm sounds when the level consistently
exceeds the specified amount.
Calibrating the tanks
Since tanks often have irregular shapes, it is strongly recom-
mended that each tank sensor be calibrated using the following
procedure.
Start with a completely empty tank, and add 25% of the capacity
at a time. Wait 30 seconds for the level reading to stabilize, and
then press Next after each step. The screen displays how much
fluid is required at each step.
1. Select a tank on the Tank setup screen and press Calibrate Tank
to begin the process. On-screen instructions give detailed
information.
2. Empty the tank, and press Next.
3. Add the number of gallons (or liters) shown to fill the tank to 25%
capacity, and press Next.
4. Add the number of gallons shown (or fill to the total number of gal-
lons shown) to fill the tank to 50% capacity, and press Next.
5. Repeat for 75% and 100%.
6. The system displays a calibration graph so you can verify that the
calibration curve is reasonable. An experienced installer may be
GMSMCRFT Rev A
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