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--></style></head><body lang=CS link=blue vlink="#954F72"><div class=WordSection1><p class=MsoNormal>Ten průběh je děsivej:-)</p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Je k tomu v DS polynom (jakého řádu), nebo velká tabulka ke stažení?</p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>PH</p><p class=MsoNormal><o:p> </o:p></p><div style='mso-element:para-border-div;border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0cm 0cm 0cm'><p class=MsoNormal style='border:none;padding:0cm'><b>Od: </b><a href="mailto:marian.hubinsky@elso.sk">Marián Hubinský</a><span style='font-size:10.0pt;font-family:"Arial",sans-serif'><o:p></o:p></span></p></div><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial",sans-serif'>termistory sa pouzivaju aj ako etalonove sondy - nahrada platiny. Su lacnejsie (relativne, vid 5641B :) a maju vacsiu citlivost ale mensi teplotny rozsah. Dosiahnes mK presnost.</span> <br><span style='font-size:10.0pt;font-family:"Arial",sans-serif'>Kedze sa presne sondy pouzivaju hlavne v rozsahu teplot prostredia (aj vacsina tych relativne lacnych teplomerov na doma) tak rozsah odporu nieje az taky extremny.</span> <br><span style='font-size:10.0pt;font-family:"Arial",sans-serif'>Pre 10k termistor 1M .. 1K pokryva teploty od -68 po 98 Celziovych.</span> <br><span style='font-size:10.0pt;font-family:"Arial",sans-serif'>Prepnutiu rozsahu (aj prudovych zdrojov) sa nevyhnes pokial chces trochu presnejsie. Pri takomto odpore nema zmysel komutacia, odpor je dost vysoky. Aj pri malom prude bude napatie meratelne.</span> <br><span style='font-size:10.0pt;font-family:"Arial",sans-serif'>Na grafe je priebeh T/R podla Steinhart-Hart, zratany na konkretnu sondu.</span> <br><br><br><span style='font-size:10.0pt;font-family:"Arial",sans-serif'>Pre info, ceny termistorov co sa pouzivaju v labakoch. posledny stlpec su sumy v Euro.</span> <br><span style='font-size:10.0pt;font-family:"Arial",sans-serif'>2611 Thermistor Probe 420</span> <br><span style='font-size:10.0pt;font-family:"Arial",sans-serif'>1504-256 1 Channel Thermometer for Thermistors 2155</span> <br><span style='font-size:10.0pt;font-family:"Arial",sans-serif'>5610-6-B Thermistor Probe, 1/8" x 6" Stainless Steel 811</span> <br><span style='font-size:10.0pt;font-family:"Arial",sans-serif'>5611A-11-B Secondary Reference Thermistor Probe, Silicone Bead 594</span> <br><span style='font-size:10.0pt;font-family:"Arial",sans-serif'>5611T-B Secondary Reference Thermistor Probe, Teflon 718</span> <br><span style='font-size:10.0pt;font-family:"Arial",sans-serif'>5640-B Thermistor Standard Probe, 0 - 60 degC 1745</span> <br><span style='font-size:10.0pt;font-family:"Arial",sans-serif'>5641-B Thermistor Standard Probe, 0 - 60 degC 2965</span> <br><span style='font-size:10.0pt;font-family:"Arial",sans-serif'>5643-B Thermistor Standard Probe, 0 - 100 degC 2605</span> <br><br><a href="https://www.elso.sk/teplotna-metrologia/hart-scientific-5641-standards-thermistor-probe-788.html"><span style='font-size:10.0pt;font-family:"Arial",sans-serif'>https://www.elso.sk/teplotna-metrologia/hart-scientific-5641-standards-thermistor-probe-788.html</span></a> <br><br><br><br><span style='font-size:10.0pt;font-family:"Arial",sans-serif'>></span> <br><span style='font-size:10.0pt;font-family:"Arial",sans-serif'>>Jan Waclawek konfera na efton.sk</span> <br><span style='font-size:10.0pt;font-family:"Arial",sans-serif'>>Pondělí Leden 20 11:27:19 CET 2020</span> <br><span style='font-size:10.0pt;font-family:"Arial",sans-serif'>></span> <br><span style='font-size:10.0pt;font-family:"Arial",sans-serif'>>[preposielam]</span> <br><span style='font-size:10.0pt;font-family:"Arial",sans-serif'>></span> <br><span style='font-size:10.0pt;font-family:"Arial",sans-serif'>>Ahoj Marian,</span> <br><span style='font-size:10.0pt;font-family:"Arial",sans-serif'>></span> <br><span style='font-size:10.0pt;font-family:"Arial",sans-serif'>>chcel by vediet, co je to to "presne merat"... Napr. ja by som v</span> <br><span style='font-size:10.0pt;font-family:"Arial",sans-serif'>>pripade termistora rozdelil ulohu na dve ciastkove, jedna je meranie</span> <br><span style='font-size:10.0pt;font-family:"Arial",sans-serif'>>odporu a druha transformacia odporu na teplotu. Kazda z nich ma svoje</span> <br><span style='font-size:10.0pt;font-family:"Arial",sans-serif'>>caro a svoje finesy a viacero moznych rieseni.</span> </p></div></body></html>