Great news....

I suggest you replace the internal battery inside the L-Nav. When this
gets low the unit will do all sorts of funny things. The L-Nav needs
this voltage to retain the proper settings. It's just a watch battery
that you can get at most drug stores.

Regards,
Pat Russette "CQ"

Mike Ash wrote:
In article
,
Papa3 wrote:

I'm sure an email to Gary Kamerer at Nielsen Kellerman will yield the
right answer, but in my experience, this is usually the sign of Bad
Things to come. You can start with the Calibrate function and try
to get the offset back to zero, by my guess is that you will run out
of adjustment. Here's the text from the manual on this:

e. [Variometer]
This screen shows the Variometer A/D reading. With no lift or sink,
the reading should be 511.
If is not, you may add or subtract an offset with the UP or DOWN arrow
keys. If the offset is
more than 40 counts, consider sending your unit to Cambridge over the
winter.

When this happened to me in the past, it required swapping out of one
of the main bits of magic.

I'm Jim's partner, and I just wanted to let you know that this was it. I
popped into this screen and the offset was set to about -50 and the A/D
reading was way down in the 400s somewhere. Bringing the offset back up
to 0 got the A/D reading right to the intended 511 mark and the vario
subsequently worked just great all day today. We have no idea how it got
set to -50 in the first place, but that it works now is the important
part. Thank you very much for this suggestion!