ohm sensor failure

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rodw
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25 Mar 2022 21:11 #238375 by rodw

Replied by rodw on topic ohm sensor failure

Looks pretty good. Its just the Ohmic threshold is set higher than your voltage being read so it will never trigger
In custom.hal

# --- Configure the ohmic component ---
setp ohmicsense.thcad-0-volt-freq 136500
setp ohmicsense.thcad-max-volt-freq 965900
setp ohmicsense.ohmic-threshold 22

First check the 0 volt and max-volt frequencies agree with the sticker on your THCAD card.
If you have a voltage adjustment on your power supply, see if you can adjust it to read exactly 24 volts with a multimeter (not a biggie)
Check the ohmic-volts in halshow again
Adjust ohmicsense.ohmic-threshold to be about 2 volts below it. eg. about 17.5 volts based on your readings.
It should work,

The following user(s) said Thank You: chuben

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