4.3
CHT - Resistive Sensors
Daqu — Manual
Engine
block
Engine GND
splitter
A
11
12
6
10
6
7
8
9
5
3
4
1
2
A
A
A
5
3
4
A
A
+
-
2
1
CHT
1
CHT
2
CHT
3
CHT
4
AUX
1
AUX
2
+
-
+
-
+
-
+
-
+
-
1
CHT
CHT
2
VDO 150
VDO 150
AWG 17 or less
Figure 17:
Typical connection of CHT sensors on Rotax 912 engines.
4.3.2
Configuration
The configuration is shown on table 5.
Option
Selection/Setting
Channel
Any A, but A13
Function
CHT 1, CHT 2, . . .
Sensor
VDO 150C
Report time
0.5 – 1.0 s
Filter
2.0 s
Table 5:
VDO 150 sensor configuration for CHT, Rotax 912.
4.3.3
Other Sensor Types
The same principles apply for other resistive temperature sensors types. When
they are grounded via engine block (majority), connect them according to
Figure 4 and when they use two wires (isolated return line), connect them
according to Figure 6.
At the time of the writing, the following sensors are supported. They differ
only in temperature – resistance curves. This means that proper
sensor type
must be selected in the configuration.
PTC, platinum based sensors: PT 100 and PT 1000.
©
Kanardia
2019
28
