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</o:shapelayout></xml><![endif]--></head><body bgcolor=white lang=CS link=blue vlink=purple><div class=WordSection1><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D;mso-fareast-language:EN-US'>Zdravím,<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D;mso-fareast-language:EN-US'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D;mso-fareast-language:EN-US'>pan Hudeček už to popsal velmi dobře, v podstatě jde o to udělat zapojení tak, aby se vyloučili různé reference atd. Tedy nespoléhat na přesná napětí, ale měřit jen poměr k přesnému a stabilnímu odporu. Samozřejmě je nutné, aby zapojení bylo 4-vodičové. <o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D;mso-fareast-language:EN-US'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D;mso-fareast-language:EN-US'>Dělali jsme před dvěma roky laboratorní přístroj, který měl být co nejpřesnější. 16 kanálů, měřicí proud softwarově volitelný 50uA až 500uA, vzorkování 5sps až 80sps. Rozlišení bylo 0,0005C a přesnost v nejhorším případě 0,02C, typická 0,008C. Koukám na schéma a tam je i normál měřen 4-vodičově, měří se offset převodníku a jiná kouzla, jako měření při různých polaritách buzení. <o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D;mso-fareast-language:EN-US'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D;mso-fareast-language:EN-US'>Dobrá na tohle byly knížky od Analog Devices, dnes to bude vše na webu.<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D;mso-fareast-language:EN-US'><o:p> </o:p></span></p><div><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D;mso-fareast-language:EN-US'>S pozdravem<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D;mso-fareast-language:EN-US'>ing. Pavel Poucha<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D;mso-fareast-language:EN-US'>jednatel<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D;mso-fareast-language:EN-US'><a href="mailto:pavel.poucha@papouch.com"><span style='color:#0563C1'>pavel.poucha@papouch.com</span></a><o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D;mso-fareast-language:EN-US'>Tel. +420 777 232 485<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D;mso-fareast-language:EN-US'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D;mso-fareast-language:EN-US'>Papouch s.r.o.<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D;mso-fareast-language:EN-US'>Strašnická 1a, 102 00 Praha 10<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D;mso-fareast-language:EN-US'>Tel. +420 272 732 827<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D;mso-fareast-language:EN-US'>Fax +420 272 681 232<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D;mso-fareast-language:EN-US'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D;mso-fareast-language:EN-US'>Máte-li chuť, navštivte naše stránky <a href="http://www.papouch.com/"><span style='color:#0563C1'>http://www.papouch.com/</span></a><o:p></o:p></span></p></div><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D;mso-fareast-language:EN-US'><o:p> </o:p></span></p><div><div style='border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0cm 0cm 0cm'><p class=MsoNormal><b><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:windowtext'>From:</span></b><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:windowtext'> Hw-list [mailto:hw-list-bounces@list.hw.cz] <b>On Behalf Of </b>pm<br><b>Sent:</b> Tuesday, December 1, 2015 5:29 PM<br><b>To:</b> HW-news<br><b>Subject:</b> Re: multiplexovani PT1000<o:p></o:p></span></p></div></div><p class=MsoNormal><o:p> </o:p></p><div><p class=MsoNormal>podelite se o nejake osvedcene zapojeni PT100 /1000 s presnosti 0,1C ?<br><br>ma smysl si hrat s operakama nebo koupit nejaky hotovy IO ? <br><br>PM<br><br>Dne 1.12.2015 v 13:54 Pavel Poucha napsal(a):<o:p></o:p></p></div><blockquote style='margin-top:5.0pt;margin-bottom:5.0pt'><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D;mso-fareast-language:EN-US'>Termistor (dobrý termistor) má přesnost 1% z hodnoty odporu. Podle koeficientu se to pak promítne do teploty, ale nic zázračného to není.</span><o:p></o:p></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D;mso-fareast-language:EN-US'> </span><o:p></o:p></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D;mso-fareast-language:EN-US'>S Pt100 se při běžných zapojeních dá dostat na přesnost 0.5C zcela běžně, každá desetinka přesnosti pak ale stojí úsilí. Měření s přesností 0.1C také není nijak závratně složité. </span><o:p></o:p></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D;mso-fareast-language:EN-US'> </span><o:p></o:p></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D;mso-fareast-language:EN-US'>S pozdravem</span><o:p></o:p></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D;mso-fareast-language:EN-US'>ing. Pavel Poucha</span><o:p></o:p></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D;mso-fareast-language:EN-US'>jednatel</span><o:p></o:p></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D;mso-fareast-language:EN-US'><a href="mailto:pavel.poucha@papouch.com"><span style='color:#0563C1'>pavel.poucha@papouch.com</span></a></span><o:p></o:p></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D;mso-fareast-language:EN-US'>Tel. +420 777 232 485</span><o:p></o:p></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D;mso-fareast-language:EN-US'> </span><o:p></o:p></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D;mso-fareast-language:EN-US'>Papouch s.r.o.</span><o:p></o:p></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D;mso-fareast-language:EN-US'>Strašnická 1a, 102 00 Praha 10</span><o:p></o:p></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D;mso-fareast-language:EN-US'>Tel. +420 272 732 827</span><o:p></o:p></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D;mso-fareast-language:EN-US'>Fax +420 272 681 232</span><o:p></o:p></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D;mso-fareast-language:EN-US'> </span><o:p></o:p></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D;mso-fareast-language:EN-US'>Máte-li chuť, navštivte naše stránky <a href="http://www.papouch.com/"><span style='color:#0563C1'>http://www.papouch.com/</span></a></span><o:p></o:p></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D;mso-fareast-language:EN-US'> </span><o:p></o:p></p><p class=MsoNormal><b><span style='font-size:11.0pt;font-family:"Calibri","sans-serif"'>From:</span></b><span style='font-size:11.0pt;font-family:"Calibri","sans-serif"'> Hw-list [<a href="mailto:hw-list-bounces@list.hw.cz">mailto:hw-list-bounces@list.hw.cz</a>] <b>On Behalf Of </b><a href="mailto:marian.hubinsky@elso.sk">marian.hubinsky@elso.sk</a><br><b>Sent:</b> Tuesday, December 1, 2015 11:11 AM<br><b>To:</b> <a href="mailto:hw-list@list.hw.cz">hw-list@list.hw.cz</a><br><b>Subject:</b> Re: multiplexovani PT1000</span><o:p></o:p></p><p class=MsoNormal> <o:p></o:p></p><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>Co sa tyka PT100 / PT1000 a PTxx tak na izbove teploty su zbytocne drahe, v tomto rozsahu termistor alebo nejaky kalibrovany digital.</span> <br><br><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>Termistor je aj najpresnejsi ale ma nizky rozsah teplot preto sa stale este pouzivaju PT-cka.</span> <br><br><span style='font-size:10.0pt;font-family:"Verdana","sans-serif"'>s pozdravom<br>Marián Hubinský<br></span><span style='font-size:7.5pt;font-family:"Verdana","sans-serif";color:#2F2F2F'><br>e-mail: </span><a href="mailto:marian.hubinsky@elso.sk?Subject=Email"><span style='font-size:7.5pt;font-family:"Verdana","sans-serif";color:#2F2F2F'>marian.hubinsky@elso.sk</span></a><span style='font-size:7.5pt;font-family:"Verdana","sans-serif";color:#2F2F2F'> <br>mobil: +421 905 652001</span> <o:p></o:p></p><p class=MsoNormal align=center style='text-align:center'><span style='font-size:7.5pt;font-family:"Verdana","sans-serif";color:#2F2F2F'>Elso Philips Service, spol. s r.o.; Jilemnického 2/53, 911 01 Trenčín; Tel: +421 32 6582410, 7431690; Fax: +421 32 6582592; Web: </span><a href="http://www.elso.sk/"><span style='font-size:7.5pt;font-family:"Verdana","sans-serif";color:#2F2F2F'>www.elso.sk</span></a><span style='font-family:"Verdana","sans-serif"'> </span><o:p></o:p></p><p class=MsoNormal> <o:p></o:p></p><div class=MsoNormal align=center style='text-align:center'><hr size=2 width="100%" align=center></div><p class=MsoNormal><br><br><br><o:p></o:p></p><pre>_______________________________________________<o:p></o:p></pre><pre>HW-list mailing list - sponsored by <a href="http://www.HW.cz">www.HW.cz</a><o:p></o:p></pre><pre><a href="mailto:Hw-list@list.hw.cz">Hw-list@list.hw.cz</a><o:p></o:p></pre><pre><a href="http://list.hw.cz/mailman/listinfo/hw-list">http://list.hw.cz/mailman/listinfo/hw-list</a><o:p></o:p></pre></blockquote><p class=MsoNormal><o:p> </o:p></p></div></body></html>