>Any of you folks have a way to measure temperature semi-accurately w/o
>expensive thermometers?  Within a few degrees would be nice, and in the range
>of 0 to 300 deg F.  I'm trying to test the calibration of a temp sensor for
>my car.
>
>I can use ice and hot water to get the 32- and 212-deg F points.  But is
>there
>a way to get 1 or 2 points between that, and a couple other points up to
>about 300 deg F?  Is there any other liquid I could boil that has some known
>boiling point perhaps?
>
>Cheers,
>-Neil.
>
>--
>http://www.piclist.com#nomail Going offline? Don't AutoReply us!
>email listservKILLspammitvma.mit.edu with SET PICList DIGEST in the body

> > Any of you folks have a way to measure temperature
> > semi-accurately w/o
> > expensive thermometers?
>
> What's wrong with digital temperature sensors? TC77 is accurate to one
> degree out of the box. LM75, DS1820 etc to within afew degrees (don't
> confuse accuracy and resolution!).
>
> Wouter van Ooijen
>
> -- -------------------------------------------
> Van Ooijen Technische Informatica: http://www.voti.nl
> consultancy, development, PICmicro products

> Best way is to get / buy / borrow a Fluke Thermocouple attachment for Fluke
> DVM. They are 0.5C accurate.
>
> --Bob
>
> At 12:37 AM 7/19/2003 -0500, you wrote:
> >Any of you folks have a way to measure temperature semi-accurately w/o
> >expensive thermometers?  Within a few degrees would be nice, and in the
> > range of 0 to 300 deg F.  I'm trying to test the calibration of a temp
> > sensor for my car.
> >
> >I can use ice and hot water to get the 32- and 212-deg F points.  But is
> >there
> >a way to get 1 or 2 points between that, and a couple other points up to
> >about 300 deg F?  Is there any other liquid I could boil that has some
> > known boiling point perhaps?
> >
> >Cheers,
> >-Neil.
> >
> >--
> >http://www.piclist.com#nomail Going offline? Don't AutoReply us!
> >email listservspam_OUTmitvma.mit.edu with SET PICList DIGEST in the body
>
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> Picdude wrote:
> > Any of you folks have a way to measure temperature semi-accurately w/o
> > expensive thermometers?  Within a few degrees would be nice, and in the
> > range of 0 to 300 deg F.  I'm trying to test the calibration of a temp
> > sensor for my car.
>
> Recently I had good results with the LM74 (National Semi), -50 to +150
> deg. C, resolution 1/16 of a degree). See also at my homepage:
> http://www.robh/nl/picsoft.htm#thermo
>
> Regards, Rob.

> > Recently I had good results with the LM74 (National Semi), -50 to +150
> > deg. C, resolution 1/16 of a degree). See also at my homepage:
> > http://www.robh/nl/picsoft.htm#thermo
>
> Almost the same as uChip's TC77, but
> - TC77 has slightly better accuracy (1 versus 1.25, but that maight be
> due to the range over which this is spec'd)
> - LM74 has higher range (up to 150 C intead of 125)
>
> Wouter van Ooijen
>
> -- -------------------------------------------
> Van Ooijen Technische Informatica: http://www.voti.nl
> consultancy, development, PICmicro products

> For an easy solution, us a LM34cz temperature sensor ($5.00) and
> connect it to 5 volts.  Then connect the output pin to a digital
> multimeter.  The voltage is proportial to the temperature and
> calibrated at the factory for 10mv/degree F.
> So:
>
> 0.00V = 0 degrees F
> 0.01V = 1 F
> 0.10V = 10 F
> 0.75V = 75 F
> 1.00V = 100 F
> 3.00v = 300 F (The top rated temperature).
>
> That's it.  You don't need any other components unless you want
> to measure negative temperatures in which case you need to shift
> the ground reference with a couple of diodes and a resistor (as
> outined in the spec sheet).
>
> Cheers,
> Andrew
>
>
> From: "Picdude" <EraseMEpicdudespamspamBeGoneNARWANI.ORG>
> To: <RemoveMEPICLISTKILLspamMITVMA.MIT.EDU>
> Sent: Saturday, July 19, 2003 1:37 AM
> Subject: [OT]: Measuring temperature...
>
>
> Any of you folks have a way to measure temperature
> semi-accurately w/o
> expensive thermometers?  Within a few degrees would be nice, and
> in the
> range
> of 0 to 300 deg F.  I'm trying to test the calibration of a temp
> sensor for
> my car.
>
> I can use ice and hot water to get the 32- and 212-deg F points.
>  But is
> there
> a way to get 1 or 2 points between that, and a couple other
> points up to
> about 300 deg F?  Is there any other liquid I could boil that
> has some known
> boiling point perhaps?
>
> Cheers,
> -Neil.
>
> ________________________________________________
> Get your own "800" number
> Voicemail, fax, email, and a lot more
> http://www.ureach.com/reg/tag

> Any of you folks have a way to measure temperature
> semi-accurately w/o expensive thermometers?  Within
> a few degrees would be nice, and in the range of 0
> to 300 deg F.  I'm trying to test the calibration of
> a temp sensor for my car.
>
> I can use ice and hot water to get the 32- and
> 212-deg F points.  But is there a way to get 1 or 2
> points between that, and a couple other points up
> to about 300 deg F?  Is there any other liquid I
> could boil that has some known boiling point perhaps?
>
> Cheers,
> -Neil.