MikeSharp01

Thanks Jeremy lots to think about there but specifically, from above, I was trying to understand the cooling effect due to motion of the air around the probe. I seem to recall, and as I said Thermo 1 & 2 were not my favourite classes when studying, that the cooling effect of wind is about breaking through the boundary layer of air around the sensor and that the sensor cools more quickly but I cannot, for the life of me, quite see how the temperature can go below the ambient temperature of the air around it no matter how fast it is travelling although a pressure drop caused by the air rushing by might explain it.

Thanks Jeremy that feels a bit slow and I wonder how long it takes to react / rate of reaction to a temperature change in the air around it?

As I was driving around Kent today I was musing on the car's exterior air temperature sensor and how fast it was, or was not, reacting to actual air temp changes outside the car. I know where it is in the car, down under / behind the front fairing and it must have some signal processing to smooth out the delta T's - observations seemed to say that the reading would update every 20s or so. I then started to wonder about the challenges of designing a very fast reacting air temperature sensor and logger that would display the curve of temperature as you drove into and out of valleys, across hill tops and through frost hollows. I then mused about 'wind chill' (Don't panic I know its not a problem for things without 'internal heat') and how the humidity / density of the air might cause a problem as it passed across the sensor as heat transfer, in theory anyway I think, will vary depending upon the density - If you think about it a bucket of water around the sensor will have more effect that a single warm molecule otherwise in a vacuum. I also dimly recalled my thermo dynamics studies (mostly asleep I think I was) and, way back at the turn of the century, noticing that side impact in cars was being measured by temperature changes, driven by the old PVT (Pressure Volume & Temperature) gas laws, in the door air, with only a fractional (1ms) lag behind what a pressure sensor could achieve. (I found a ref HERE). In then end, many of these effects and constraints demand a sensor with very low mass (I did not say thermal) in order that the work required to raise and low its temperature is very small. So I am now on the look out for a very low mass, and hence fast reacting sensor - any ideas?

+1 to use plastic everywhere unseen - it is easy and although soldering copper is fun it is not as safe - you will need a heat resistant matt to protect any woodwork near where you are soldering, unless you would like the insurance company to replace the house along with the plumbing should it catch fire, as well as some flux along with the Torch and cutters @PeterW mentions. I, personally, don't necessarily feel that the Hep20 is the ONLY choice but if you go that way don't forget to get the unlocking tools - The John Guest (Speedfit) does not need a tool but does have locking collars which clip in if you want to be sure the fitting is locked.

In the drivers directory of the windows directory might have win32 directory in between can't recall exact structure and away from my pc. It will find them for itself and yiu can get the them via the control panel / systems memu. Make sure your don't connect a raw XP machine without the fire wall turned on, to your network in case it gets compromised.

Not a great deal of help but only halfway through - got to the jumper CMOS reset. Oops cross posted - well done.

Should detect it but otherwise try the key Combi is there a manual for these devices?

Should get an rgb output though if integrated screen dead.

That's a good one Terry !

Ooops - too many oooooos..

Nothing to loose.

Looks like they will.make great door stops but as computers they seem not to be upto.much. The sync system is standard stuff on real time systems and might be the wake up your system needs but given they were replaced you might assume they are broken rather than waiting for a sync command up the RS232 port or some such.

It won't boot from the dvd if it's not enabled in the bios. Might boot froM a USB device or maybe even the network. Can yiu get to the bios screen?

It won't boot from a live disc if the bios does not have it on the boot list so you need to get to the bios and that might mean holding a couple of keys on the keyboard but it needs the screen live.

Do you know what system these were used in / on. My experiance of Allen Bradley is as part of process control systems which might explain why they don't start as the BIOS might be awaiting an input from an external system. Just a thought.

Good to see that you are over your self deprocating of this morning. How about this one. https://www.appliancesdirect.co.uk/p/f170h/white-knight-f170h-freestanding-freezer

8 minutes - on the TUBE!

what did you have on the front end to pull in the signals?

With your handy spectrum analyser one supposes. I have an old HP unit, weighs about 50Kg but it only goes up to 2GHz perhaps I could transvert it

Ok - so an interesting evening with the Cleeve Hill project team. I know a little bit more about the project, a lot more about my neighbours and the pros and cons as they see it. and something of the driving force businesses behind it. I met with the ecology team and they took me through quite a lot of the work they have been doing and it is clear that the wildlife will, assuming they do what they say they will do, will be fine and perhaps better off than they are now. While I was having this discussion we got a little waylaid by one of my neighbours who said that the one good thing about the scheme, she was in favour of no other aspect, would be that there would be no more nitrate run off from the 890 acres as it would no longer be farmed. Sheep will not graze because the panels will be too low and as they are arranged - see below they will provide too much shade so little will grow other than along the ditch margins of which there is about 2 miles in the scheme. I spoke with the technical team who had not done an energy compare between the energy from the crops and / or the solar farm. Interestingly another neighbour had written a note on the large map which said surely we should not be giving over the food potential just to get solar energy! The arrangement of the panels is interesting: They will be arranged in rows of ridges running north south with panels facing East and west on either side with a low angle of 8deg. This allows then to get more panels in as they can touch at the ridge and at the gully with almost no gap. This also gives a flatter output curve but without the midday peak! The battery technology is yet to be announced but their reasoning is that they will want to use the latest technology and they assume that by 2019 - when the battery goes in, the technology will be twice as good as it is now. The low angle and east / west orientation allays my fears about glare during the low sun periods. I then spoke to the developer - the MD of HIVE, on the matter of community involvement. He said he thought that my suggestion of allowing the locals to buy into the panels at their bulk price was a good one and he felt that the panel price would be well under £100 per panel (33p/W). I agreed to follow it up with him. That price roughly aligns with my reading of the trends in panels over the last couple of years.

just clearing up on site and off to the consultation event in the village hall - will let you all know what they have to say for themselves!

Oh-er where does that leave your stuff - back in their repository or on the type 1 - ready to be snowed on

Inclusions or incursions?

We decided to have a second panel that split the power between the two buildings as there was not room in the meter panel for the distribution switches (IMO) it could have been squeezed in but the switch fuse idea that @ProDave suggests might not make it into your box either. So our meter panel looks a bit likes yours but without the very smart meter and the second panel distributes the power to the main house CU and the garden room CU in your case you could substitute the piggery CU for the garden room. PS the excel panel (will eventually) provides a few additional outputs including the garden lighting, a car charger point and a local commando socket for outdoor power.

In ours - when it is built, the water will rush down the wetroom shower trap, 20mm lower than the floor, what with the water and the UFH I expect the house would become a steam room!