Electronics International MVP-50P - Manual (Page 64)

* A Reference junction is provided to accommodate TC probes. Temp channel 8 is closest to the “Ref
Diode” and is best used for measuring OAT.
Resistive Fuel Level:
The resistive and capacitive inputs share channels. Only one input type should be used per channel.
Input Range: 0 to 18 Volts single-ended input.
Input Impedance: 14.4K Ohms.
Sensitivity: .07169mV per count when set for non ratiometric measurement.
Notes:
* The Resistive Fuel Level inputs may be used to monitor other functions or annunciators.
* When monitoring a resistive probe a RFLM-4-12 or -24 module will be required (see E.I. price
sheets). Also, measurements are made ratiometric to the bus voltage.
Capacitive Fuel Level:
The resistive and capacitive inputs share channels. Only one input type should be used per channel.
Input Trigger Level: 2.1 Volts
Frequency Range: 0 to 6 KHz.
Input Impedance: 33.2K Ohms
Sensitivity: 14 counts per Hz..
Notes: The Capacitive Fuel Level inputs may be used to monitor other functions.
OAT and IAT: OAT and IAT: OAT and IAT: OAT and IAT: OAT and IAT:
OAT will be displayed as Corrected OAT when the following is true:
1. Pressure Alt is provided.
2. Airspeed is provided
3. Recovery Factor is set for > 0.0
Pressure Altitude:
Pressure Altitude is calculated from the input of a PT-30ALT transducer by means of a lookup table
entered in the “Pressure Altitude Calibration” screen. Also, this screen provides a temperature compen-
sation value specific for an individual transducer. The normal value is 35. Note: A NACA 2nd order
polynomial interpolation is used between calibration points.
VSI:
VSI calculations are derived from averaging changes in altitude over time. If the altitude function is
selected, VSI will be available.