Chevrolet ranger rt Owner's Manual page 77

HOWTO: Monitor Panel
74
Tank Levels and Battery Charge Indicator
To the right of the monitor panel switches are the indicator lights
for the battery charge level, the propane tank level, the fresh
water tank level, and the black and gray water tank levels. Press
the button for each to see the display. These will give you an
approximate reading, to the nearest third, of how much is in
each tank.
Roadtrek recommends that you keep a small amount of water in
your gray and black tanks at all times. This will reduce the
likelihood of material sticking to the inside of the tank.
The four indicator lights for the battery are low, fair, good, and
charging. Battery voltage dips under load; the greater the load
the greater the voltage dip. A battery under heavy load will show
much lower state than one at rest.
Tank level indicators
The propane indicators will show full when the tank is at it
maximum capacity. Because of the safety-related need for a
vapor space at the top of the propane tank, the maximum fill capacity is 80% of the volume of the tank. Your 38 liter/10
gallon propane tank is full when it holds 30.4 liters/8 gallons of propane. There is another gauge directly on the tank that you
can see behind the propane fill door on the side of the van. This gauge has finer gradations and will give you more
information about your propane level than the indicator light display will.
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