[T3] CHT sensor

[Daniel Nohejl]

If you're interested, the last post on this page shows how the temp and resistance specs from a chart in the "K" manual can be graphed according to an equation. Using a scientific calculator and Microsoft Excel, you can compare the readings of your sensor to factory specs. If you're not a math guy, the issue is discussed further on the following page.

http://www.thesamba.com/vw/forum/viewtopic.php?t=514048&postdays=0&postorder=asc&start=900

And here's the temp/resistance chart itself:

http://classicvw.org/gallery2/v/Fuel-Injection-Manual/Fuel_Injection_035.jpg.html

Dan. 


On Apr 11, 2013, at 10:55 AM, Daniel K. Du Vall wrote:

> Thanks Jim was not sure if I should post it there or not.
> Good to know it's not too far off. 
> Where did you get your chart to compare the readings too?
> 
> On 10 Apr 2013 at 22:57, Daniel K. Du Vall wrote:
> 
>> What sort of readings should I see on the CHT sensor?
>> I know you said it was off but I am just trying to get an idea of what I am seeing.
>> I know it changes with temp and right now I am getting a reading of 
>> roughly 3.55k ohm @ 66F
> 
> It will go down as the temp rises, and your number sounded high to me, but when I checked my chart and converted to C, you're just a little high. However, there's a pretty wide tolerance on this, so I'd say you're probably fine.
> 
> Questions like this are always welcome on the list.
> 
> --
> *******************************
> Jim Adney, jadney at vwtype3.org
> Madison, Wisconsin, USA
> *******************************
> 
> _______________________________________________
> VWType3.Org mailing list - type3 at vwtype3.org
> http://lists.vwtype3.org/listinfo.cgi/type3-vwtype3.org
> Contact gregm at vwtype3.org if you need help with the list.