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Temp measurement - Page 2

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Posted by Morris Dovey on August 21, 2005, 3:13 pm
 
David L. Jones (in
1124590922.995260.110790@f14g2000cwb.googlegroups.com) said:

| Do yourself a favour and get some Thermochron iButton temperature
| loggers:
| http://www.maxim-ic.com/products/ibutton/ibuttons/thermochron.cfm
| I use these for (among other things) measuring my solar heater
| design and they are fantastic. You can stick them onto the
| collector surface, stick them on the outside of the polycarb front
| panel and get the reflected heat, hang them in the middle of
| ducting to get air flow temps, put them all throughout the house to
| get thermal profiles etc etc
| It gives me temp plots like this:
| http://boondaburra.com/images/SolarSpongeExample.gif

Dave...

I took a quick tour of your web site (and visited the Maxim site) -
and liked what I saw both places.

Would you please provide some how-to info on setting up these things
so that temperature readings can be captured in a PC? I'd like to be
able to "walk in your footsteps" rather than "re-invent the wheel".

--
Morris Dovey



Posted by David L. Jones on August 21, 2005, 10:04 pm
 

Morris Dovey wrote:

Hi Morris,
Easy peasy:
1) Get yourself some DS1921G sensors (others are avialable, but this
one is general purpose)
http://www.maxim-ic.com/quick_view2.cfm?qv_pk@23

2) Get yourself one of these "Blue-Dot" readers for the serial port (or
USB port) so your can program and read the devices
http://www.maxim-ic.com/products/ibutton/ibuttons/blue_dot.cfm#touchhold
You can also get a starter kit with both the above:
http://www.maxim-ic.com/quick_view2.cfm?qv_pk (20

3) Get yourself the free control TMEX software here:
ftp://ftp.dalsemi.com/pub/auto_id/licensed/tm322_32.exe

Software is easy to use and you can set the buttons to log temperature
at pre-set intervals in 1min/sample intervals minimum, giving 1.4days
of logging at one sample per minute. Longer if you choose a lower
sample rate.
You can also do histogramming, set min/max alarms, and set sampling to
start at a pre-set time. The softare has a "wizard" to make it real
easy. I can "mission" 5 buttons in under a minute. Each sample is
time/date stamped.
Data can be read back with the same software and exported into a
spreadsheet format for analysis.

Battery life is 10 years, and the devices are waterproof and almost
indestructable. I also attach them to my shoelaces and take them on
canyoning adventures to log water temperature!

You can buy everything on-line from the Maxim website, just click on
the "Buy" links.

Have fun.

Regards
Dave :)


Posted by Morris Dovey on August 21, 2005, 11:37 pm
 David L. Jones (in
1124661893.154025.232570@g44g2000cwa.googlegroups.com) said:

| 1) Get yourself some DS1921G sensors (others are avialable, but this
| one is general purpose)
| http://www.maxim-ic.com/quick_view2.cfm?qv_pk@23
|
| 2) Get yourself one of these "Blue-Dot" readers for the serial port
| (or USB port) so your can program and read the devices
|
http://www.maxim-ic.com/products/ibutton/ibuttons/blue_dot.cfm#touchho
ld
| You can also get a starter kit with both the above:
| http://www.maxim-ic.com/quick_view2.cfm?qv_pk (20
|
| 3) Get yourself the free control TMEX software here:
| ftp://ftp.dalsemi.com/pub/auto_id/licensed/tm322_32.exe
|
| Software is easy to use and you can set the buttons to log
| temperature at pre-set intervals in 1min/sample intervals minimum,
| giving 1.4days of logging at one sample per minute. Longer if you
| choose a lower sample rate.
| You can also do histogramming, set min/max alarms, and set sampling
| to start at a pre-set time. The softare has a "wizard" to make it
| real easy. I can "mission" 5 buttons in under a minute. Each sample
| is time/date stamped.
| Data can be read back with the same software and exported into a
| spreadsheet format for analysis.
|
| Battery life is 10 years, and the devices are waterproof and almost
| indestructable. I also attach them to my shoelaces and take them on
| canyoning adventures to log water temperature!
|
| You can buy everything on-line from the Maxim website, just click on
| the "Buy" links.

Dave...

*Thank you!*

--
Morris Dovey
DeSoto Solar
DeSoto, Iowa USA
http://www.iedu.com/DeSoto/solar.html



Posted by Christian Kaiser on August 22, 2005, 7:38 am
 @David: thank you too. I did not know these devices, and they look very
promising.

Christian.



Posted by Fabrizio Cattaneo on August 24, 2005, 8:49 pm
 David L. Jones wrote:

Thanks, for link; good project..

This is another project with TC74 ( from Microchip )
http://www.portalsole.it/sezione.php?dY


And this  prject use analog probe ( LM35 ), pic processor for data
conversion and Siteplayer for web features :

http://www.portalsole.it/liveplant.php

Ciao,
Fabrizio.



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