DOC AIRBUS | AMM A320FOIL TEMPERATURE INDICATING SYSTEM - DESCRIPTION AND OPERATION
** ON A/C NOT FOR ALL
1. Scavenge Oil Temperature Thermocouple
The scavenge oil temperature thermocouple is located in the combined scavenge line between the master magnetic chip detector and the scavenge filter for indication in the cockpit.
The oil temperature is sensed by a dual resistor unit. The unit consists of a sealed, wire-wound resistance element. This element causes a linear change in the DC resistance when exposed to a temperature change.
Temperature measurement range:
** ON A/C NOT FOR ALL The scavenge oil temperature thermocouple is located in the combined scavenge line between the master magnetic chip detector and the scavenge filter for indication in the cockpit.
Scavenge Oil Temperature ThermocoupleThe oil temperature is sensed by a dual resistor unit. The unit consists of a sealed, wire-wound resistance element. This element causes a linear change in the DC resistance when exposed to a temperature change.
Temperature measurement range:
- 60 deg. C to 250 deg. C.
2. Oil Temperature Indicating
The analog signal from the scavenge oil temperature thermocouple is transmitted to the EIU. The EIU transforms this signal into a digital signal.
This digital signal is then transmitted to the lower ECAM display unit through the FWCs and the DMC.
Advisory level : the oil temperature indication flashes green when the temperature is higher or equal to 156 deg. C and becomes steady amber beyond 165 deg. C.
The warning message ENG 1(2) OIL HI TEMP is displayed on the upper ECAM display unit associated with the amber MASTER CAUT light and the single chime when:
The analog signal from the scavenge oil temperature thermocouple is transmitted to the EIU. The EIU transforms this signal into a digital signal.
This digital signal is then transmitted to the lower ECAM display unit through the FWCs and the DMC.
Advisory level : the oil temperature indication flashes green when the temperature is higher or equal to 156 deg. C and becomes steady amber beyond 165 deg. C.
The warning message ENG 1(2) OIL HI TEMP is displayed on the upper ECAM display unit associated with the amber MASTER CAUT light and the single chime when:
- The oil temperature is higher than 155 deg. C for 15 min,
- The oil temperature is higher than 165 deg. C.