Wrong CHT values on EMS D10 installation

Bujor

I love flying!
Joined
Apr 1, 2019
Messages
1
Hi,

I’ve just installed an EMS D10 on my Rotax 912 ULS.
Since the EGT readings are fine, I have troubles with the
two CHT readings as folow:
Until now I had only one probe read , CHT 2 (right side) on an analogic instrument. The max temperature shown was 100 degrees, that was matching with the thermostat setting (thermostat opens at 100 degrees)
- probes are the ones from Rotax originals;
- I have used the 1.21 kilo ohms as indicated in installation manual, connection from 5V excitation circuit and input via 37 pin D Sub connector. CHT setup on GP1 and GP2 input on EMS.
Problems:
- indicated value on EMS from CHT raised much faster and ended up at much higher values (ex over 150 degrees Celsius)
- I tried to replace the resistor with a lower value, until zero ohms and still the values remained much greater than normal.

Can you please provide advices, was anything wrong in the installation ? What can I do to  get correct indications ?
 
Top