Page 6 of 6

Re: Mercury Removal - But No replacement

Posted: Thu Dec 07, 2017 10:49 am
by Carl M
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.

Re: Mercury Removal - But No replacement

Posted: Thu Dec 07, 2017 12:27 pm
by darrog
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

Re: Mercury Removal - But No replacement

Posted: Thu Dec 07, 2017 7:50 pm
by Paul C
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.

Re: Mercury Removal - But No replacement

Posted: Thu Dec 28, 2017 4:41 pm
by Paul C
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 ?

Re: Mercury Removal - But No replacement

Posted: Thu Dec 28, 2017 6:56 pm
by Carl M
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 ;)

Re: Mercury Removal - But No replacement

Posted: Thu Dec 28, 2017 8:04 pm
by Paul C
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

Re: Mercury Removal - But No replacement

Posted: Fri Dec 29, 2017 10:26 am
by Paul C
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