DOC AIRBUS | AMM A320FOIL PRESSURE/TEMPERATURE INDICATING SYSTEM - DESCRIPTION AND OPERATION
** ON A/C NOT FOR ALL
1. General
The Oil-Pressure Temperature sensor (OPT) is part of the indicating system. Its function is to measure:
** ON A/C NOT FOR ALL The Oil-Pressure Temperature sensor (OPT) is part of the indicating system. Its function is to measure:
- The differential pressure between the Accessory Gearbox (AGB) oil supply and the oil-air mixture within AGB sump.
- The oil temperature at engine oil inlet.
- The OPT sensor is mounted on the oil supply line at the AGB inlet, two O-rings are installed on the OPT sensor to prevent oil leakage.
2. Component Description
The OPT is a dual channel sensor composed of a body including:
** ON A/C NOT FOR ALL The OPT is a dual channel sensor composed of a body including:
- A dual differential-pressure measurement-system (strain gauge)
- A dual temperature measurement-system
- Two electrical connectors
- A mounting flange with intrusive pressure ports.
3. System Description
The dual temperature sensing-elements are made of platinum, which resistance varies as function of the temperature.
The dual-differential pressure-measurement system is composed of a membrane whose shape can change if different pressures are applied on its two sides.
One side of the membrane is set at the pressure upstream the AGB inlet, the other side at the AGB internal air pressure. The distortion caused by the pressure difference is then measured by a strain gauge which provides a voltage proportional to the differential pressure.
The dual temperature sensing-elements are made of platinum, which resistance varies as function of the temperature.
Oil Temperature Indicating System (Temperature Probe)The dual-differential pressure-measurement system is composed of a membrane whose shape can change if different pressures are applied on its two sides.
One side of the membrane is set at the pressure upstream the AGB inlet, the other side at the AGB internal air pressure. The distortion caused by the pressure difference is then measured by a strain gauge which provides a voltage proportional to the differential pressure.