Temperature- And Pressure Measuring System; 1) Cylinder Head Temperature Sensor - Rotax 912 Series Maintenance Manual

13.5) Temperature- and pressure measuring system

On the ROTAX
Wiring Diagram in the aircraft manufacturer's Operating Manual.
13.5.1)
Effectivity: 912 Series
AIRCRAFT ENGINES
MAINTENANCE MANUAL II
engine 912 there are three temperature measuring points. See
®
Cylinder head temperature sensor
See fig. 108 and 109.
The two sensors Q for cylinders 2 and 3 are screwed into the bottom side
of the cylinder heads. On the cylinder head only the material temperature
of the head is measured and not the temperature of the cooling liquid. The
operational temperature is 90 - 120°C (194 - 250°F) and must not exceed
150°C (300°F). If temperature is exceeded, check the
— cooling system
— temperature sensor
— monitoring instrument
— cable connection
— sensor cable
See Maintenance Manual type 912 Series (Line Maintenance) Chapter
05-50-00 para 2.7.If using 100 % anti-freeze (without adding water),
coolant residues in the area of the sensor may result in too high material
temperature readings. As a remedy add 20 % water.
The sensor has its grounding connection directly via the cylinder head.
The sensor resistance values are shown in the resistance temperature
curve beside.
CAUTION: The resistance temperature curve was defined under
the following conditions and is valid only under these
circumstances.
Ambient temperature:
Deviation:
fig. 108
00327
1
20°C (68 °F)
max. ± 10%
(Ω)
1200
1000
800
600
400
200
0
20 40
00227
60 80 100 120 140 160
(°C)
fig.109
page 77
Initial issue, Jan. 01/2002