My tests were more complex then you would typically encounter. This was because I was testing a custom design before general public release. The firt set of softeware coefficients gave results that ...
When I calibrated my CHT's I set up about a pint of engine oil in a flat bottomed pot. Heat was provided by a fondu warmer. I got the pot a 'Bed Bathe & Beyond as a lidded canister for about $5. ...
You might be experiencing a ground problem rather then a noise voltage. A single point ground is recommended. CHT's and EGT's output millivolts which make them sensitive to ground current loops and ...