On Sun, 04 Mar 2012 16:55:27 -0000, Harry Bloomfield wrote:
DerekG formulated on Sunday :
On Sun, 04 Mar 2012 14:42:26 +0000, Lieutenant Scott wrote:
Can someone explain the use of a heater INSIDE a mechanical (bimetal
strip) room thermostat? (It usually just seems to be a resistor placed
near the bi-metallic strip).
All it seems to do for me is make the thermostat very inaccurate.
[ ... ]
I've replaced the offending pile of crap with a digital one anyway, but
I wanted to know why they design them like this.
It's an anticipator, and should be set so as to introduce exactly the
right amount of heat inside the thermostat casing so that it doesn't have
to wait for the heat to percolate from a radiator across the other side
of the room, thereby tailoring the response so that it stabilises sooner.
It's a bit like trying to throw a Yo-Yo away whilst still holding onto
the string. And yes it's a crap plumbers idea.
DerekG
A plumber could not come up up with such a clever idea :')
It was a widely used idea to prevent over reaction of the heating
system, due to the wide hysteresis of a mechanical thermostat in the
days before modern electronic stats. The stat switches on, which then
powers a resistor, which warms the bi-metal sensing element, so the
stat gets both the warmth of the heating system and the warmth from the
resistor.
But it's wildly inaccurate. And there seems to be no adjustment for them.
--
http://petersparrots.com
http://petersphotos.com
Some "chinese english" instructions (with software for a camera card). This is the contents of a file named "English installs the elucidation.doc", quoted in its entirety:
The high regard's customer:
How are you!
Thank youing can use the pico product of my company, and please press below the operation order install, and thank!
A,The software installs in proper order
1, install the good WIN2000 system;
2, open the software light the dish;
3, double click the SETUP.EXE
4, the model number of the choice gearing
a)PICO2000_104( PALApplication) this model number can at most support 4 roads see the frequency signal the importation
b)PICO2000_208( PALApplication) this model number can at most support 8 roads see the frequency signal the importation
c)PICO2000_416( PALApplication) this model number can at most support 16 roads see the frequency signal the importation
5, after finishing installing, three documents that light patch in the dish the catalogue descend: The msdxm.ocx, odbc32.dll, odbcint.dll beat arrives the c:\ windows\ system inside.
6, square version of usage hero , please double click the light the English Pack in the dish the document.
7, the copy resemble the regulating of appearance tone must install the VideoSetup software to proceed to regulate, install the procedure under the light dish root the catalogue VideoSetup the blank page clip setup.exe.
Plank card gearing
1.Insert the plank card arrive the main plank PCI the slot;
2.Start the calculator, and the auto install the plank card the drive to move the procedure( position:Light dish driver catalogue bottom)
Change the compression method
Beginning the ? circulate the ? the importation the " REGEDIT", and make sure the ?? enter the registration watch the editor, and open the HKEY ? CURRENT ? the USER\ software\ univision Canada Linited\ the pico2000 double click the " CODEC" can is worth this key to change to" MP42" or" IV50"
Note:
MP42 the MPEG4 compress the way (suggestion adoption MPEG4 compress way, should compress the way the compression the rate to is high)
IV50 the INDEO compress the way