K-Factor; Contrast; Bl; Alarm - MGL Avionics Stratomaster Smart Single Manual

With the selection to "No", no fuel flow related functions are available.

K-Factor

The K-Factor is the number of pulses generated by the fuel flow sender for one liter of fuel. The
dual range fuel flow sender supplied by MGL Avionics has a K-Factor of 7000 in the low flow
mode (jet installed) and 1330 for the high flow mode (no jet installed).
You can use the K-Factor to calibrate your fuel flow sender.
The recommended procedure would be:
Fill your tank to an approximate known level (perhaps marked using a felt pen). Set the FF-1 to
calculate fuel level from fuel flow (disable the fuel level sender using the menu function
"LevelSend").
Set the fuel level to read 40 liters – the exact value is not important.
Now fly of a quantity of fuel, perhaps 25 liters as example (very roughly – it does not need to be
exact). Note the reading of the fuel level after you switch off the engine. Assume we are reading
28 liters now (we used 22 liters according to the instrument).
Now fill the tank again, exactly to the previous level. Measure how much fuel you need to get to
this previous level using a measuring jug.
For example, assume we need 26 liters to get back to the previously marked fuel level. This
means the the fuel level should have been at 24 liters as we started with a value of 40 liters.
This example would mean that our fuel flow sender is under reading by four liters as it has not
measured the correct quantity of fuel.
Now start adjusting the K-Factor so your tank level changes from 28 liters to 24 liters. You would
adjust the K-factor down in this case (fewer pulses per liter of fuel).
Using this calibration method you can get to very accurate fuel flow readings. The initial accuracy
of fuel flow readings is dependant on the viscosity or type of fuel you use, added oils, installation
and finally the temperature of the fuel.
A good installation can achieve about a +/- 3% accuracy with as little as 1% error after calibration.

Contrast ...

This function allows you to change the display contrast to your liking. You can select values from
about 20 to 45. (can vary depending on display type).

BL ...

This function allows you to switch the display backlight on or off.

Alarm ...

Enter your desired minimum fuel value that you would like to trigger the fuel low alarm. The fuel
low alarm will result in flashing of the fuel level display and remaining fuel readout. You can also
connect a warning lamp to the external alarm output (see installation diagram).
Note that the fuel low level will be displayed as a vertical line on your fuel level display. This level
is over and above your "silent" fuel reserve.

Units ...

Select your required units for distance and fuel quantity. The following options are available:
L/M: Liters and statute miles