PilotAware

British Forum => Technical Support => Topic started by: Paul_Sengupta on June 10, 2016, 12:33:00 am

Title: QNH 1305mb
Post by: Paul_Sengupta on June 10, 2016, 12:33:00 am

I received my bridge today (cheers Dave!) and have just put the whole PilotAware together on my RP2. I updated the software to 20160530.

However, when I look at the web page, I'm seeing strange values for QNH and QNE. The QNH is currently showing 1305mb! I don't think this is right. Either my barometric sensor is a bit out or there are some sums being done incorrectly somewhere.

Hmm, just looked, now showing QNH 1313mb, QNE=-8156ft, GNSS=154ft.

The GPS altitude looks fairly sensible for here.

Can I ask those who have the Bridge to have a look at what values it gives for QNH?

Title: Re: QNH 1305mb
Post by: AlanG on June 10, 2016, 09:38:28 am

Hi Paul

Pi2 with bridge sitting on window sill reporting 1016 QNH against local (EGPH) ATIS reporing 1015QNH.

It does wander a mb or two when it is inside but usually pretty consistent.

Regards
Alan

Title: Re: QNH 1305mb
Post by: EricC on June 10, 2016, 09:48:37 am

Bridge been very good here +/- 1 mb using Blackpool and Warton QNH.

I have notice if the pressure change is very slow, electronic sensors
are slow to react, compaired to a quality manufactured mercury barometer.

Title: Re: QNH 1305mb
Post by: exfirepro on June 10, 2016, 10:15:55 am

Paul,

Mine's reading 1017mb at present which is about right for EGPH. Haven't heard of any other reports of dodgy readings, so unlikely to be software. Looks like you've got a dodgy unit.

Regards

Peter

Title: Re: QNH 1305mb
Post by: GarethHorne on June 10, 2016, 11:16:48 am

Installed my new bridge last night and its reporting QNH=1016mb QNE=230ft GNSS=322ft, pretty much as expected (Doncaster showing 1014).

Title: Re: QNH 1305mb
Post by: Admin on June 10, 2016, 01:45:39 pm

Quote from: Paul_Sengupta on June 10, 2016, 12:33:00 am

I received my bridge today (cheers Dave!) and have just put the whole PilotAware together on my RP2. I updated the software to 20160530.

However, when I look at the web page, I'm seeing strange values for QNH and QNE. The QNH is currently showing 1305mb! I don't think this is right. Either my barometric sensor is a bit out or there are some sums being done incorrectly somewhere.

Hmm, just looked, now showing QNH 1313mb, QNE=-8156ft, GNSS=154ft.

The GPS altitude looks fairly sensible for here.

Can I ask those who have the Bridge to have a look at what values it gives for QNH?

Sounds like a hardware fault doesnt it ?
I presume a cold restart (power disconnect) does not cure it ?

Title: Re: QNH 1305mb
Post by: DaveStyles on June 10, 2016, 01:57:33 pm

Hi Paul,

PM sent, could you drop me an email at the pilotawarehardware email address if you've not received it.

cheers

Dave.

Title: Re: QNH 1305mb
Post by: Paul_Sengupta on June 10, 2016, 02:08:27 pm

Got it, thanks Dave.

No, a power reset doesn't fix the issue. I'd be up for soldering on a new baro sensor, but I might leave that bit up to you!  :D