Measuring Resistance Of EGT Probes (CF6)
Hi, folks.
I haven't done much work on this system and was asked to take measurements of each EGT probe on a CF6. The AMM asks you to take a resistance reading across the terminals of each probe, then swap over the pos/neg leads of the meter and measure again (then work out the average).
Some of the measurements were fairly standard, but then others were showing a higher than normal resistance in one direction and a negative resistance(???) in the other.
Is this normal?
Does it have something to do with the Chromel /Alumel (disimilar metals) junctions ... or was I doing something wrong?
Thanks.
Rgds.
NSEU