Shorting Plug Connectors - Wing Tanks
Figure 008
R 1EFF : 001-049, 051-061, 101-105, 201-203, 1 28-42-00Page 68 1301-399, 1May 01/05 1 1 1CES 1 The other probes have a mounting bracket at each end. The bottom bracket is attached to the probe and does not move. The top mounting bracket can move around the probe to include tolerance differences in the manufacture of the fuel tank. A terminal block is installed on the side of each probe to connect with the related tank harness. Fused plug connectors are installed between the probes and the wing tank harnesses. Fused adapters are installed between the probes and the center tank harnesses. (Ref. Fig. 008A, 009)
R **ON A/C 001-049, 051-099, 101-149, 151-199, 201-299, 401-499,
The electrical capacitance-value of the probe changes in relation to the depth of fuel in the tank. When the probe is dry, its capacitance value is low, but as fuel moves up the probe, its capacitance value increases. The FQIC continuously measures the capacitance value.
The FQI probes 22QT1(22QT2) and 33QT1(33QT2) have diodes that are used to measure the temperature of the adjacent fuel. The FQIC supplies a voltage to the diodes and monitors the voltage that returns from them. The voltage drop across the diodes is in relation to the temperature of the adjacent fuel. The FQIC calculates the temperature of the fuel and displays it on the System Display (SD) FUEL page of the ECAM.
**ON A/C 301-399,
The electrical capacitance-value of the probe changes in relation to the depth of fuel in the tank. When the probe is dry, its capacitance value is low, but as fuel moves up the probe, its capacitance value increases. The FQIC continuously measures the capacitance value.
The FQI probe 54QT1(54QT2) has a temperature sensor installed at its lower end. The temperature sensor has an electrical resistor, the value of which changes in relation to the temperature of the fuel. The FQIC continuously measures the resistance value and uses it to calculate the fuel temperature. The fuel temperature is displayed on the System Display (SD) FUEL page of the ECAM.
1EFF : ALL 1 28-42-00Page 69 1 1 Aug 01/05 1 1 1CES 1
Fused Plug Connectors - Wing Tanks
Figure 008A
R 1EFF : 001-049, 051-099, 101-149, 151-199, 1 28-42-00Page 70 1201-299, 401-499, 1Aug 01/05 1 1 1CES 1
Fused Adapters - Center Tank
Figure 009
R 1EFF : 001-049, 051-099, 101-149, 151-199, 1 28-42-00Page 71 1201-299, 401-499, 1Aug 01/05 1 1 1CES 1
R **ON A/C 001-049, 051-099, 101-149, 151-199, 201-299, 401-499,
The probes 24QT1(24QT2) and 39QT have a Capacitance Index Compensator (CIC) at their lower end. The CIC has two functions:
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when fully covered in fuel, to measure the dielectric constant (K)
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when not fully covered in fuel, as a probe.
The FQIC uses the dielectric constant (K) to calculate the fuel
density.
G. Cadensicon 19QT1(19QT2), 20QT
The cadensicon has:
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a capacitor assembly
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a detector assembly
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a circuit card assembly
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a base assembly
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a cover. The capacitor assembly, the detector assembly and the circuit card assembly are on the base assembly. The base assembly has seven spade-type connectors that connect the cadensicon to the related electrical harness in the fuel tank.
Fuel moves freely into and out of the cadensicon through holes in the cover. The fuel is the dielectric between the five parallel plates of the capacitor assembly. The FQIC calculates the charge on the plates from which K, the relative permittivity of the fuel is calculated. The detector assembly has:
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a float
-an axle assembly and weights
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a compensator circuit
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a detector.
The float and the detector core are connected to the axle assembly. Thus movement of the float will cause the detector to turn. Supports connect the detector and the counterweights. Thus any attitude movement (pitch and/or roll) will cause the detector to turn. The detector is a variable transformer the output of which is in relation to the detector core position.
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