Connections For Instrumentation; Sensor For Cylinder Head Temperature - Rotax 914 series Installation Manual

23) Connections for instrumentation

These connections to be established in accordance to certification and/or national specifica-
tions.
The certification for connections and connection lines have to be conducted by the aircraft
manufacturer to the latest requirements like FAR and EASA.
For notes regarding the electric rev counter consult the chapter 19.4.13.

23.1) Sensor for cylinder head temperature

See Fig. 4, 89, and 90.
◆ NOTE:
The temperature sensor (1) is directly fitted into cylinder head i.e. a direct temperature
reading of the cylinder head material is taken. This allows the exact measuring of the
cylinder head temperature even in the case of coolant loss.
◆ NOTE:
- location: in the cylinder head of the cylinders 2 and 3, see Fig. 4.
- connection:
- grounding:
- graph of sensor resistance over temperature
(Ω)
1200
1000
800
600
400
Fig. 89
200
00227
0
■ CAUTION:
Effectivity: 914 Series
Edition 2 / Rev. 0
INSTALLATION MANUAL
A direct reading of the coolant temperature is not provided for.
Readings are taken on the hottest cylinder, depending on engine
installation.
spade terminal 6,3x0,8 to DIN 46247
via engine block
20 40 60 80 100 120
The graph resistance over temperature has been determined, and is
effective at the following conditions only.
ambient temperature: 20 °C (68 °F)
tolerance:
BRP-Rotax
04868
cylinder head
2
3
140 160
(°C)
± 10%
Axes
x axis y axis z axis
mm mm mm
-200,0 241,0 -157,0
-387,0 -241,0 -157,0
Fig. 90
00327
page 133
July 01/2008
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