Winter project

Eric Greenwell wrote:
The 302 manual makes no mention of an internal battery, so I assume
there is no need to change it. I don't know how they handle trashing the
security seal if the box is opened.

There is an internal long-life lithium battery, it just doesn't need to
be replaced on a routine basis. Eventually, I suspect, it will need
replacement (perhaps after 10 years or so), in which case the 302 will
need to be returned to Cambridge or one of its agents...

Marc

Do you know that for sure or could it be some type of non-volatile memory?
That Dittle FSG71M has a built-in Lithium battery for it's memory which is
soldered into the PC board and looks like a capacitor. Dittle recommends
changing every 5-6 years. Not a job for amateurs.

--
Hartley Falbaum
"Marc Ramsey" wrote in message
...
Eric Greenwell wrote:
The 302 manual makes no mention of an internal battery, so I assume there
is no need to change it. I don't know how they handle trashing the
security seal if the box is opened.

There is an internal long-life lithium battery, it just doesn't need to be
replaced on a routine basis. Eventually, I suspect, it will need
replacement (perhaps after 10 years or so), in which case the 302 will
need to be returned to Cambridge or one of its agents...

Marc

HL Falbaum wrote:
Do you know that for sure or could it be some type of non-volatile memory?
That Dittle FSG71M has a built-in Lithium battery for it's memory which is
soldered into the PC board and looks like a capacitor. Dittle recommends
changing every 5-6 years. Not a job for amateurs.

Yes, the 302 has a lithium battery to provide backup for an internal
volatile memory (I believe the flight logs are store in flash memory,
however). It can't be replaced by the owner, as it requires opening the
case, which will break the security seal. In a few years I'm sure we'll
be hearing on r.a.s. just how long this battery lasts...

Marc

Thanks---
I have a 302 and not a word in the manual about it! No "page" of the 302
divulges the condition of the battery to warn of impending failure. Perhaps
we should all email Cambridge to request a firmware change or some direction
in the manual.

How did you learn of this situation?

Thanks again for the info
--
Hartley Falbaum
ASW27B "KF" USA

"Marc Ramsey" wrote in message
...
HL Falbaum wrote:
Do you know that for sure or could it be some type of non-volatile
memory?
That Dittle FSG71M has a built-in Lithium battery for it's memory which
is soldered into the PC board and looks like a capacitor. Dittle
recommends changing every 5-6 years. Not a job for amateurs.

Yes, the 302 has a lithium battery to provide backup for an internal
volatile memory (I believe the flight logs are store in flash memory,
however). It can't be replaced by the owner, as it requires opening the
case, which will break the security seal. In a few years I'm sure we'll
be hearing on r.a.s. just how long this battery lasts...

Marc