HM 4.0 probe issues

[Ryan Evans]

I hate being such a PITA but I need some help again. I know this problem is brought on by my own modifications to Bryan's design.

In my hopes of creating a waterproof HM, I put everything in a different case. I took the standard probe wires, cut them, and soldered them to a cable which goes through a Cannon plug. This was to create a waterproof connection to the probes and to add length to the probes for my pit.

When I power up, probe 2 works but that's it. If I play around, probe 3 works and 2 drops out. Probe 1 has never worked. I have 3.3V on all wires. I have continuity between all shields of the probes and nothing seems wrong, even though there obviously is.

I have played around with how far I insert the plugs into the probe connectors on the HM board and that made no difference. I am at a loss.

Thanks,

Ryan

 

[Dave Smith]

I may be wrong, but I don't think you can add length to probes unless you use extra wire made just for probes. Regular wire will not work.

 

[RalphTrimble]

I may be wrong, but I don't think you can add length to probes unless you use extra wire made just for probes. Regular wire will not work.

The above is true for thermocouple probes, but regular wire will work for regular probes if done right....