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 Mercury Removal - But No replacement 
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 Post subject: Re: Mercury Removal - But No replacement
PostPosted: Thu Dec 07, 2017 10:49 am 
Assistant Professor
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Location: Drumburgh
Altitude: 7m
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Paul C wrote:
Battery failure


That's not good news - it states that if the battery runs dry there's a risk of ruining it.
This is now getting silly.

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 Post subject: Re: Mercury Removal - But No replacement
PostPosted: Thu Dec 07, 2017 12:27 pm 
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Joined: Mon Nov 02, 2009 10:23 pm
Posts: 1930
Location: Maulds Meaburn, Cumbria
Altitude: 183
Weather Station: Davis VPro2
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Paul - my understanding is that you only connect to the back-up battery when you are removing the primary one to charge, so the back-up will never kick in when the primary fails.
I was not told to have both connected at the same time and to turn the dial to top centre - so a battery failure on the primary means lost data.

there has to be a better way

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 Post subject: Re: Mercury Removal - But No replacement
PostPosted: Thu Dec 07, 2017 7:50 pm 
Professor
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Joined: Mon Nov 02, 2009 8:52 pm
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Location: Brampton
Altitude: 117m
Weather Station: Davis VP2
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Well was told to have both installed and have +1 and plus 2 dialed in. So if the main battery dies, it automatically switches to the smaller backup battery.

Clearly this didnt happen.

I left the smaller one connected and tried the switch in all settings, non worked. I removed the battery and brought it back to the house, put on charge it showed full !

I have contacted Matt and hopefully a spare smaller one being sent out soonest. What we need to do is to report any loss of battery/power to him, the more queries he gets the more Met Office HQ will have to do something about it - the cost of all this change must be huge !!
Matt is keen to get some kind of warning light added to the system to show low battery - hope this is the case.

I am in a fortunate position as I dont work and can change the battery. But I fear for other stations that reply on the goodwill of family and friends that an observer may go on on holidays and returns to find flat batteries, no data and a worried relative apologizing that they didnt know what to do.

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 Post subject: Re: Mercury Removal - But No replacement
PostPosted: Thu Dec 28, 2017 4:41 pm 
Professor
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Joined: Mon Nov 02, 2009 8:52 pm
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Location: Brampton
Altitude: 117m
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OK - another issue this morning

The Unit at 0900hrs was displaying -0.1c - easy, recorded.

As I checked wet bulb etc, I noticed the Unit changed and then read -0.0c (minus 0.0c)

This is new for me, we can -0.1c and +0.1c we can also have just 0.0c, but surely we cant have a minus 0.0c

Can we ?

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Paul C
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 Post subject: Re: Mercury Removal - But No replacement
PostPosted: Thu Dec 28, 2017 6:56 pm 
Assistant Professor
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Joined: Mon Nov 02, 2009 9:25 pm
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Location: Drumburgh
Altitude: 7m
Weather Station: Davis VP2
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Paul C wrote:
This is new for me, we can -0.1c and +0.1c we can also have just 0.0c, but surely we cant have a minus 0.0c
Can we ?


No always written down as 0.0c

It's probably looking at the nearest decimal point -0.01 -0.02 -0.03 or -0.04 which it can't display hence the minus -0.0.
-0.05 -0.06 -0.07 etc would be -0.1c.

Of course I might be talking rubbish ;)

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 Post subject: Re: Mercury Removal - But No replacement
PostPosted: Thu Dec 28, 2017 8:04 pm 
Professor
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Joined: Mon Nov 02, 2009 8:52 pm
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Location: Brampton
Altitude: 117m
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Well that was my train of thought, but if that was the case why are the rest of the temps shown to two decimal points ?

Will fire off an email :P

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Paul C
Brampton. 117m ASL.
http://www.bramptonweather.co.uk
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 Post subject: Re: Mercury Removal - But No replacement
PostPosted: Fri Dec 29, 2017 10:26 am 
Professor
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Joined: Mon Nov 02, 2009 8:52 pm
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Location: Brampton
Altitude: 117m
Weather Station: Davis VP2
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Had feedback from Met Office - the unit records way past several decimal points so rounds it up on the screen

so if you see -0.0c - record it as just 0.0c

that was the message back

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Paul C
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