Hi all,
Although typically this can be resolved by replacement of the internal
battery (and then keeping it charged), the reality is that this will be
an ongoing and random problem - because the failure occurs after the
internal battery fails or is allowed to run flat.
It is possible that the IGC Sporting Code will be amended to allow this
date change to be accepted for some levels of validation, though I doubt
it would be changed sufficiently to allow the validation of a record
claim, and changes do take some time.
However, the bottom line is that it is really time to consider an
upgrade. I don't think anyone can expect an item of electronic
equipment to last for ever, and these have lasted far longer than most.
Cheers
/Tim Shirley/
/tra dire é fare c' é mezzo il mare/
On 1/12/2014 1:17 AM, Ron Sanders wrote:
Regards how widespread this is Pam i do not know but i have two
volksloggers that tell me it is 1995.
ron S
On 29 November 2014 at 16:11, pam <p...@kurstjens.com> wrote:
Please be aware that some older Flight Recorders have a problem with the
DATE – they think it is 1995.
This is coming from the older Garmin engines in some FRs- so far Cambridge
20, 25, older 302s, Volksloggers, Zander models have been identified.
Ask the agent for your FR if they can fix the problem.
Ian Macphee can fix Cambridge untis – call him.
Here is something from a recent thread on Aus-Soaring:
Ian Mc Phee Tue, 11 Nov 2014 12:49:51 -0800
All the model 20 Cambridge camera box loggers have this garmin gps 25
engine as well as early aluminium case 302 vario (not the newer black case
ones). Many now are displaying this March 1995 date yet are still
acquiring satellites & navigating which I find strange.
At this stage I am replacing 302s with a garmin GPS15 engine which is
smaller but with adapter fits.
I can replace the GPS25 battery and then reset the clock (adding UTC time
and lat and long approx & maybe they will kick start again) but is a real
pain.
Anyhow if you have a Cambridge mod 20 or non black case 302 then check date
and if 1995 you WILL have issues.
I ask the question how many electronic items do you have 20 years old? Not
many I suspect. The model 10 brick box is over 20 yrs old and most model 20
loggers are over 15 years old.
So maybe upgrade time is coming and remember all vario makers have made
significant improvements in varios over the years.
Ian Mcphee
You will need to send the Volkslogger to some-one who can reset the memory
inside the GPS and at the same time replace the internal battery or upgrade
to a new logger.
See post from several years ago from on Aus-Soaring.
I found this post which indicates that the engine is a Garmin GPS25.
Just to wrap things up, this problem has beep traced to the Garmin GPS
Engine. The GPS25 engine has a battery which maintains some memory and
also runs the Real Time Clock when the device is not in use, recharging
during normal operation.
When the GPS25 battery is low (which happens more often the older the
logger is), memory in the GPS engine sometimes gets partially corrupted,
in a way that the GPS is not able to detect.
Therefore, the GPS thinks it is 1,024 weeks (about 19.6 years) before
present date.
The solution is to replace the GPS battery (in order to reduce the
probability of a re-occurrence), and reset the memory inside the GPS so
that it knows in which 19.6 year epoch it is. This is not something the
user can do.
It has nothing to do with the Volkslogger Internal Battery, but it is
perhaps worth thinking about taking the opportunity of replacing it
during the repair.
Sounds like the GPS date rollover problem affecting older GPS units, where
the date wraps around every 1024 weeks. Here, 8 Nov 2014 minus 1024 weeks
is 25 March 1995. The problem should have first appeared on 21 August 1999.
See http://en.wikipedia.org/wiki/Time_formatting_and_storage_bugs
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