Zander 941

[John Sullivan]

Hi, I have a Zander GP 941, one of the few in the US. It's recording
current flight dates to of occured in 1996.
"Where a FR has already lost the date facility, the solution is to return
the FR for modification to the manufacturer or his agent. The fault is
because the GPS receiver no longer registers the correct GPS date
Epoch, reverting to dates in 1 the first Epoch which started on 6
January 1980 when the US GPS system first went on line after its
development phase.
A GPS date Epoch consists of 1024 weeks (19 years and 36 weeks)
before the next Epoch starts. Where this fault exists the date recorded
is typically 1024 weeks too early, and in some FRs other faults may
also be present. We are now in the second GPS date Epoch. This
started in August 1999 and will change to the third Epoch in April
2019. If the GPS receiver or FR firmware recognizes that it is in the
second date Epoch, the correct date will appear on the IGC file."
Has anyone else been able to overcome this by simply charging the
unit or does the battery have to be replaced. if so who can do it since
Zander has shut down. I love this recorder and the Zander ZS1.
Someone should create a next gen with nice big moving map display.
John Sullivan - UFO

[Tim Newport-Peace[_2_]]

At 15:56 27 May 2015, John Sullivan wrote:
>Hi, I have a Zander GP 941, one of the few in the US. It's recording
>current flight dates to of occured in 1996.
>"Where a FR has already lost the date facility, the solution is to return

>the FR for modification to the manufacturer or his agent. The fault is
>because the GPS receiver no longer registers the correct GPS date
>Epoch, reverting to dates in 1 the first Epoch which started on 6
>January 1980 when the US GPS system first went on line after its
>development phase.
>A GPS date Epoch consists of 1024 weeks (19 years and 36 weeks)
>before the next Epoch starts. Where this fault exists the date recorded
>is typically 1024 weeks too early, and in some FRs other faults may
>also be present. We are now in the second GPS date Epoch. This
>started in August 1999 and will change to the third Epoch in April
>2019. If the GPS receiver or FR firmware recognizes that it is in the
>second date Epoch, the correct date will appear on the IGC file."
>Has anyone else been able to overcome this by simply charging the
>unit or does the battery have to be replaced. if so who can do it since
>Zander has shut down. I love this recorder and the Zander ZS1.
>Someone should create a next gen with nice big moving map display.
>John Sullivan - UFO
>
>
Have you tried cantacting Franz Pöschl at
http://www.sdi-variometer.de/user/kontakt.html

[Peter von Tresckow]

Tim Newport-Peace > wrote:
> At 15:56 27 May 2015, John Sullivan wrote:
>> Hi, I have a Zander GP 941, one of the few in the US. It's recording
>> current flight dates to of occured in 1996.
>> "Where a FR has already lost the date facility, the solution is to return
>
>> the FR for modification to the manufacturer or his agent. The fault is
>> because the GPS receiver no longer registers the correct GPS date
>> Epoch, reverting to dates in 1 the first Epoch which started on 6
>> January 1980 when the US GPS system first went on line after its
>> development phase.
>> A GPS date Epoch consists of 1024 weeks (19 years and 36 weeks)
>> before the next Epoch starts. Where this fault exists the date recorded
>> is typically 1024 weeks too early, and in some FRs other faults may
>> also be present. We are now in the second GPS date Epoch. This
>> started in August 1999 and will change to the third Epoch in April
>> 2019. If the GPS receiver or FR firmware recognizes that it is in the
>> second date Epoch, the correct date will appear on the IGC file."
>> Has anyone else been able to overcome this by simply charging the
>> unit or does the battery have to be replaced. if so who can do it since
>> Zander has shut down. I love this recorder and the Zander ZS1.
>> Someone should create a next gen with nice big moving map display.
>> John Sullivan - UFO
>>
>>
> Have you tried cantacting Franz Pöschl at
> http://www.sdi-variometer.de/user/kontakt.html

The same thing is happening it model20/25s as well as volkslogger schism is
a bug in the Garmin gps25 embedded in these devices. Probably your best bet
would be to invest in a nano or similar.

Peter owner of a functional model25 and a bricked volkslogger

[David Kinsell[_2_]]

On Wed, 27 May 2015 23:29:58 +0000, Peter von Tresckow wrote:

> Tim Newport-Peace > wrote:
>> At 15:56 27 May 2015, John Sullivan wrote:
>>> Hi, I have a Zander GP 941, one of the few in the US. It's recording
>>> current flight dates to of occured in 1996.
>>> "Where a FR has already lost the date facility, the solution is to
>>> return
>>
>>> the FR for modification to the manufacturer or his agent. The fault is
>>> because the GPS receiver no longer registers the correct GPS date
>>> Epoch, reverting to dates in 1 the first Epoch which started on 6
>>> January 1980 when the US GPS system first went on line after its
>>> development phase.
>>> A GPS date Epoch consists of 1024 weeks (19 years and 36 weeks)
>>> before the next Epoch starts. Where this fault exists the date
>>> recorded is typically 1024 weeks too early, and in some FRs other
>>> faults may also be present. We are now in the second GPS date Epoch.
>>> This started in August 1999 and will change to the third Epoch in
>>> April 2019. If the GPS receiver or FR firmware recognizes that it is
>>> in the second date Epoch, the correct date will appear on the IGC
>>> file."
>>> Has anyone else been able to overcome this by simply charging the unit
>>> or does the battery have to be replaced. if so who can do it since
>>> Zander has shut down. I love this recorder and the Zander ZS1.
>>> Someone should create a next gen with nice big moving map display.
>>> John Sullivan - UFO
>>>
>>>
>> Have you tried cantacting Franz Pöschl at
>> http://www.sdi-variometer.de/user/kontakt.html
>
> The same thing is happening it model20/25s as well as volkslogger schism
> is a bug in the Garmin gps25 embedded in these devices. Probably your
> best bet would be to invest in a nano or similar.
>
> Peter owner of a functional model25 and a bricked volkslogger

More charging won't fix the units, even a new battery wouldn't be
adequate since the units think they're in the previous epoch and need to
be reset.

The gps25 just wasn't adequately engineered to have such a long lifetime,
and the FR vendors could have done a better job of supporting the thing
in the application.

I always wince when people spend as much fixing up the old units as a new
unit with far superior specs would cost. Time to move on.

Dave

[krasw]

On Friday, 29 May 2015 14:45:42 UTC+3, David Kinsell wrote:
> I always wince when people spend as much fixing up the old units as a new
> unit with far superior specs would cost. Time to move on.
>
> Dave

Except variometer part in Zander SR940/GP941 system is still one of the best, and moving on might easily mean stepping down.

[David Kinsell[_2_]]

On Fri, 29 May 2015 05:12:20 -0700, krasw wrote:

> On Friday, 29 May 2015 14:45:42 UTC+3, David Kinsell wrote:
>> I always wince when people spend as much fixing up the old units as a
>> new unit with far superior specs would cost. Time to move on.
>>
>> Dave
>
> Except variometer part in Zander SR940/GP941 system is still one of the
> best, and moving on might easily mean stepping down.


That's fine. It's like the Cambridge 302, which I currently have, many
people like its variometer. If my logger goes out, I'll buy a Nano and
leave the 302 in place. Nano is tiny, it's not like it's a panel space
issue. I'll let the 302 gps still drive my moving map, which is a Nook
with TopHat.

I've been accused in the past of "hating all 302's", which was a stupid
comment (even for R.A.S.). Making rational decisions about obsolescent
hardware isn't anything to be ashamed of.

Dave

[Alexander Swagemakers[_2_]]

As far as I know the ZS1 was a joint venture between Zander and SDI from the start, so basically it still has full support from SDI. In any case, a fix is available from SDI. They replace the lithium batterie of the GPS module and make some software changes to the Garmin software. When returning the Logger it is also recommended to have the internal lithium battery replaced since it is usually well along the path of it's ten year lifetime.

I paid around 180 EUR for the fix and the internal battery replacement.

Since you need the GP941 to provide a GPS signal to the ZS1, reverting to a more modern logger is not really an option unless you want to replace the complete setup.

As an alternative an NMEA input mod is available for the ZS1 which will allow and NMEA source to be used to feed a GPS Signal - even though that will probably cost similar effort to having the logger fixed.