PZL Variometer Model WRs-5D

[LB1]

Takie pytanie pojawiło się na RAS:

Evening All, I have a problem with my vario reading 1 Knot down and I'd
like
to adjust it back to zero.
I've searched the web for hours looking for an instruction manual but
cannot
find anything about zeroing this particular vario.

Is their anyone out there that can help?

Thanks

Czy ktoś może zna odpowiedź?

Dzięki, Jacek