Sorry Jim – my mistake. I was talking about Cambridge 20 problems where the internal battery often causes erratic behaviour.
OzFlarms don’t have an internal battery – which is why if the power goes off they die instantly. Flarms, like other loggers, record both pressure altitude and gps altitude, and transmit an NMEA sentence to the PDA which contains the altitude readings, so that the PDA then has pressure altitude to use for glide calculations. I don’t think the Flarm would “switch” altitudes in the way you suggest. Cheers Tim Tra dire e fare c’è mezzo il mare From: [email protected] [mailto:[email protected]] On Behalf Of Jim crowhurst Sent: Monday, 9 September 2013 11:52 To: [email protected] Subject: Re: [Aus-soaring] Cambridge 20 problem But i dont have the cambridge just the flarm and the pda. Do either of these have a internal battery? Sent from Samsung Mobile Tim Shirley <[email protected]> wrote: It is almost certainly the internal battery. I have seen this type of erratic behaviour quite a few times. I’m not saying that with 100% certainty, because much else can go wrong. But it is the first thing to try. Cheers Tim Tra dire e fare c’è mezzo il mare From: [email protected] [mailto:[email protected]] On Behalf Of Jim crowhurst Sent: Monday, 9 September 2013 11:41 To: [email protected]; [email protected] Subject: Re: [Aus-soaring] Cambridge 20 problem I have a feeling the my problem may be the flarm switching rapidly between gps and barometric pressure. I will try my other pda and then the volkslogger. Could it be a winpilot thing? Jim [email protected] wrote: Hi Jim, Tim Shirley suggested changing the Cambridge internal battery. I did this (the voltage jumped from 3.0V to 3.3V) as a precaution but will have to wait until the next flying day to see if it made any difference. Regards Jarek BTW I run WinPilot 9 on a HX4700 JM ----- Original Message ----- From: "Discussion of issues relating to Soaring in Australia" <[email protected]> To: <[email protected]> Cc: Sent: Mon, 9 Sep 2013 06:37:55 +1000 Subject: Re: [Aus-soaring] Cambridge 20 problem Jarek. I run winpilot on my ipaq 3890 and it gets data from the flarm (ozflarm) I get the same steps on the trace from winpilot. I have checked this with 2 different flarm systems in 2 different gliders and it is the same problem. So unlikely to be lose wires etc. I have no idea why it does this. I am troubleshooting atm and am going to try the volkslogger to feed winpilot instead. The strange L/D info is the program trying to adjust the calculation from the steps. Its odd because on my traces the stepping is intermittent. If you find a solution let me know. Jim Jarek Mosiejewski <[email protected]> wrote: Hi, I’ve already emailed Ian McPhee about this but perhaps someone has an idea what could be the problem. - No trace in the Cambridge recorder. - The PDA connected to the Cambridge recorded the flight (WinPilot) but with the date of 23/01/1994. - In flight, I experienced some strange final glide and L/D required calculation by WinPilot. - The barogram when loaded to SeeYou appears as a series of up-and-downs of about 200+ ft. vertical range: http://www.onlinecontest.org/olc-2.0/gliding/flightinfo.html?dsId=3375473 (the flight is invalid because I manually changed the HFDTE record to the actual flight date) - HFFXA100 record - fix accuracy is 100m, should it be better than this? I’ve checked the internal battery voltage, Cambridge Aero Explorer reports 3.0V. I’ve been using this instrument for a few years but never seen anything like this. Regards Jarek _____ Email sent using Optus Webmail _____ No virus found in this message. Checked by AVG - www.avg.com <http://www.avg.com/> Version: 2013.0.3392 / Virus Database: 3211/6601 - Release Date: 08/23/13 Internal Virus Database is out of date. _____ No virus found in this message. Checked by AVG - www.avg.com Version: 2013.0.3392 / Virus Database: 3211/6601 - Release Date: 08/23/13 Internal Virus Database is out of date.
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