Re: LM35 Temperature Sensor Design Help - LM35 circuit.bmp (1/1) - Article 2348 - go-pugleaf

Article View: sci.electronics.design

Article #2348

Back to sci.electronics.design Previous Next

Re: LM35 Temperature Sensor Design Help - LM35 circuit.bmp (1/1)

#2348

From: Robert Baer
Date: Tue, 18 Feb 2003 09:04

21 lines
2422 bytes

David Lesher wrote:
> 
> "Antony N. Lord" <antony_lordX@hotmail.com> writes:
> 
> >>   Actually, the LM35 and variants are more accurate than most commercial
> >> thermometers; one has to shell out a fairly good chunk of change to get
> >> a calibrated thermometer as good as or better than these ICs.
> >>   No calculations, lines of best fit, or any other trash like that.
> 
> >I suppose that is true - but surely there has to be calculations /
> >adjustments made due to voltage loss etc. in the cable run between the
> >sensor and the interface.
> 
> I'm missing the original post, but I installed about a dozen LM35's
> several years ago. The data sheet had a spiffy current loop scheme
> that solved that issue. The price was some fixed error that you
> could easily offset in software if need be. (We ignored it as we were
> concerned about delta, not absolute, data.)
> 
  Actually, that was not required; all one needs is Kelvin connections
and a hi Z load like your DVM.

Technical Details

Message-ID: <3E51F7DF.B60CC10B@earthlink.net>

Path:

arc1-ca.pugleaf.net!archiver1.google.com!news1.google.com!newsfeed.stanford.edu!nntp.cs.ubc.ca!nntp-relay.ihug.net!ihug.co.nz!west.cox.net!cox.net!newsfeed1.earthlink.net!newsfeed.earthlink.net!stamper.news.pas.earthlink.net!newsread1.prod.itd.earthlink.net.POSTED!not-for-mail

References:

<antony_lordX-291B79.18134130122002@mec2.bigpond.net.au> <3E11569A.407F57C6@earthlink.net> <antony_lordX-383E5A.22443202012003@mec2.bigpond.net.au> <b2r75d$951$1@reader1.panix.com>

Show Full Headers

Complete Article Headers

X-Google-Language: ENGLISH,ASCII-7-bit
X-Google-Thread: 112d1e,c633630f27d8aa83
X-Google-Attributes: gid112d1e,public
X-Google-Thread: 103407,c633630f27d8aa83
X-Google-Attributes: gid103407,public
X-Google-ArrivalTime: 2003-02-18 01:06:32 PST
Path: arc1-ca.pugleaf.net!archiver1.google.com!news1.google.com!newsfeed.stanford.edu!nntp.cs.ubc.ca!nntp-relay.ihug.net!ihug.co.nz!west.cox.net!cox.net!newsfeed1.earthlink.net!newsfeed.earthlink.net!stamper.news.pas.earthlink.net!newsread1.prod.itd.earthlink.net.POSTED!not-for-mail
Message-ID: <3E51F7DF.B60CC10B@earthlink.net>
From: Robert Baer <robertbaer@earthlink.net>
X-Mailer: Mozilla 4.75 [en] (Win98; U)
X-Accept-Language: en,pdf
MIME-Version: 1.0
Newsgroups: sci.electronics.design,aus.electronics
Subject: Re: LM35 Temperature Sensor Design Help - LM35 circuit.bmp (1/1)
References: <antony_lordX-291B79.18134130122002@mec2.bigpond.net.au> <3E11569A.407F57C6@earthlink.net> <antony_lordX-383E5A.22443202012003@mec2.bigpond.net.au> <b2r75d$951$1@reader1.panix.com>
Content-Type: text/plain; charset=us-ascii
Content-Transfer-Encoding: 7bit
Lines: 21
Date: Tue, 18 Feb 2003 09:04:57 GMT
NNTP-Posting-Host: 216.26.4.111
X-Complaints-To: abuse@earthlink.net
X-Trace: newsread1.prod.itd.earthlink.net 1045559097 216.26.4.111 (Tue, 18 Feb 2003 01:04:57 PST)
NNTP-Posting-Date: Tue, 18 Feb 2003 01:04:57 PST
Organization: EarthLink Inc. -- http://www.EarthLink.net

Reply to Parent Message