MGL Avionics Stratomaster Ultra “L” Owner’s manual
Page 57
Notes on Slope error
Sender value is a value determined by the Stratomaster Ultra. It is used to calculate e.g. fuel
level, fuel bingo estimate and current range estimate. The fuel tank setup sender value can
either increase in value as fuel is added on decrease in value if fuel is added. This is
dependant on the type of fuel level sender used. However should the second reading be
larger than the first reading all readings will have to be larger than the previous reading.
Likewise should the second reading be smaller than the first reading all readings will have to
be smaller than the previous reading. If this is not the case the wording "Slope error" will be
displayed. This could happen when fuel was removed instead of added between steps, no
fuel was added between steps or when the fuel level sender was moved in the wrong
direction e.g. moving the fuel level sender manually when it is not inserted in to the fuel tank.
Should you get a slope error message determine the cause of the error. If you do not know
the cause of your error it is best to start from scratch. It should be remembered that accuracy
is the fuel tank calibration is Ultraly important to enable your Stratomaster Ultra to display the
correct data.
CARING FOR THE STRATOMASTER ULTRA
Pitot tube
Dust etc. can cause a blockage in the pitot tube. Such blockage will effect the operation of
the pitot tube which will in turn affect the accuracy of the ASI/TAS readings. We recommend
that the pitot tube be covered when the aircraft is not in operation.
Cleaning
The Stratomaster Ultra can be cleaned by wiping it with a damp cloth. A mild soap may be
used if necessary.
Take care not to wet the instrument excessively.
Do not use chemicals e.g. petrol, spirits, turpentine when cleaning the instrument.
Calibration
The Stratomaster Ultra instrument does not require re-calibration if it is used in normal
operation.
Stratomaster Instruments used as references to calibrate other instruments may be sent in
for periodic calibration to MGL Avionics. For this application we recommend a two year
calibration interval. Please contact MGL Avionics for details.
Altimetry
This section is intended to clarify how an altimeter works and what determines its accuracy in
simple terms.
As you know an altimeter is a simple absolute pressure gauge. This means it measures the
pressure of the surrounding air relative to absolute vacuum as you would find in outer space.
Ordinary, well made altimeters are intricate mechanical devices that can achieve very good
performance. However, these are subject to a whole host of influences that introduce errors
in the readings. Vibrations tend to wear out the tiny gears, temperature has an effect on the
To Next Page
Loading...
