Electronics International MVP-50T - Manual (Page 47)

6.12 “Flaps, Trim and Special Function Calibration” Screen:
This screen allows you to calibrate Flaps, Trims and special
functions. A voltage signal is received from a control pot connected
to the flaps (or trim tab). The value of this signal is called “Raw
Counts.” The Raw Counts should change as the flap position
changes. To scale these Raw Counts to a meaningful value perform
the following:
“1. Select the function and its voltage source.”
“Function”: Select the function to be calibrated. The
function must be mapped into the MVP to be available (see the
“EDC Inputs, Functions, and Screen Setup” section of this
manual).
“Powered By”: The control pot can be powered by the aircraft bus (preferred) or the by the EDC. If the
control pot is powered by the aircraft bus, the MVP must do a ratio metric calculation to insure the flap
readings do not change when the bus voltage changes.
“2. Set the maximum Display values below.”
“Max Upper (or Right) Value:” Enter the maximum up or right value. This would be “0” degrees for flaps.
“Max Lower (or Left) Value:” Enter the maximum down or left value. This may be “40” degrees for flaps.
Note: For Trims these values may be +30 degrees to -30 Degrees.
“The display value (INCREASES / DECREASES) when the “Raw Counts” increase.” Determine
whether you want the “Displayed Value” to increase or decrease as the Raw Counts (as shown to the right of
the Horizontal Strip Gauge) increase. You may want to watch the Raw Counts as you cycle the control.
“3. Select “Calibration” below, then cycle the control through its full range a few times.”
The MVP performs an automatic calibration by scaling the maximum and minimum Raw Counts to the “Max
Upper” and Max Lower” values you previously selected. As you cycle the control through its range a few
times the max and min reading on the Horizontal Strip Gauge should match your programmed values.
“Gain” and “Offset” The automatically calibrated gain and offset values can be changed manually to achieve a
specific Displayed Value for a specific control setting.
6.13 “MVP Input/Output Tests” Screen:
This screen allows you to test the various MVP input and output lines. This screen can be very useful in
troubleshooting system problems.
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