Electric Variometer reading backwards

I’d look for a restrictor in your pneumatic lines, they were used to slow down overactive various back in the day before we got good total energy probes. Another issue could be 3 various sharing one total energy input, a slight decrease in pressure seen in the first vario can cause a slight flow from the other various, in the opposite direction. Add a restrictor to this mess and you can get trapped pressures in the system. No more than 2 various should be sharing your total energy probe. I fly with a fairly fast electric vario with audio and a slow second vario, don’t feel I need any more.
Hope this helps,
JJ

Is the variometer integrated with the Computer or is it separate and connetced via a wire?

My old Zander SR940 had an separate Guage for the variometer and it was possible to reverse the polarity in the electrical wiring. That would result in the behavior you describe.

If it’s a Winter, it’s mechanical not electric. You have the TE and flask the wrong way around, don’t ask how I know......

On Friday, December 20, 2019 at 4:58:53 PM UTC-5, Per Carlin wrote:
Is the variometer integrated with the Computer or is it separate and connetced via a wire?

My old Zander SR940 had an separate Guage for the variometer and it was possible to reverse the polarity in the electrical wiring. That would result in the behavior you describe.

It is separate and from what I could see, it was connected by two electrical wires. These wires also seemed to have been (poorly) reconnected at some point by twisting the wires together and using electrical tape, so the reversed polarity seems very likely to me, especially after reading your post.

I'm still unsure of the vario model, but I confirmed the computer is a Zander SR 800. I think I will try swapping those two wires next chance I get (and soldering them properly while I'm at it).