Are Pins 27/28 and 35/36 Internally Connected???

[Dynon101]

I have wired up my EMS-220 pins 27/28 to be a Type J thermocouple for TURBINE INLET TEMPERATURE and named that pair "TIT" and then I also wired up pins 35/36 to be an engine cowl temperature sensor using a Type K thermocouple and named that pair "COWL".

The problem is that when I put a heat gun to the cowl temperature probe BOTH the TIT and the COWL temperature indications begin to rise to the exact same indicated temperature (I have not yet heated up the TIT probe to see if the COWL will also rise but will conduct that test when I get home).

Why would they both rise at the same time even though the two probes are nowhere close to each other?

Is there some kind of programming/mapping that I need to do to the EMS?

THANKS!!! :-[

 

[Dynon101]

Can somebody please help me with this?

For some reason the two pairs of thermocouple wires are acting like they are connected together even though they are wired separately.

Any reason why this would be the case?

THANKS

 

[Dynon]

So thermocouples work by generating a small voltage differential when a temperature is applied across the sensor. The only "obvious" thing that immediately comes to mind here is if you'd hooked up one thermocouple to half of each input (ie, the TIT sensor to say pins 28/36). One other thought - the EMS module itself isn't being heated at the same time, is it?

 

[Dynon101]

> One other thought - the EMS module itself isn't being heated at the same time, is it?

I will check the wires. The two sensors are about 2 feet apart and I am confident that one was heated and the other was room temperature

Thanks