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Pyrometer Jumping?

9937 Views 10 Replies 7 Participants Last post by  Blackcloud2k
Hey I got a question, I helped a buddy install his gauges on Thursday. Today his pyrometer needle started jumping around, back and forth.

Is that a ground issue? Or something else? I'm just trying track down the problem before I tear into it to fix it.
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Pyrometer circuits are sensitive instruments that amplify uV/mV signals into something the gauge can read...Electrical noise, grounding issues, partial circuit failures can all be to blame.

I would start troubleshooting in this order.

1.Change the ground/check the ground.
2. Look for things in the wiring that can give off noise and give your pyro a fit. If you see something obvious move the wires or install some chokes on the line to help suppress noise. in this instance, near the gauge would be better.

3. if all else fails ask the manuf if it's possibly a bad gauge.
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