I.Kufotokozera

Thermometer ya Standard Platinum Resistance imagwiritsidwa ntchito poyesa kutentha kwapakati pa 13.8033k—961.8°C, ndipo imagwiritsidwa ntchito ngati muyezo poyesa ma thermometer osiyanasiyana ndi ma thermometer olondola kwambiri. M'dera lotentha lomwe lili pamwambapa, imagwiritsidwanso ntchito mwachindunji poyesa kutentha kwa kulondola kwambiri.

Thermometer ya Standard Platinum Resistance imayesa kutentha malinga ndi kusintha kwa kutentha kwa platinum.

Mogwirizana ndi malamulo a ITS90, T₉₀Zimatanthauzidwa ndi thermometer ya platinamu pamene mfundo zitatu (13.8033K) za nayitrogeni zifika pamlingo wa kutentha kwa siliva wozizira. Zimalembedwa pogwiritsa ntchito gulu la mfundo zofunika zozizira komanso ntchito yowunikira komanso ntchito yopatuka ya interpolation ya kutentha.

Kugawa kutentha komwe kwatchulidwa pamwambapa kwagawidwa m'magulu angapo ndipo kwasankhidwa kugwira ntchito bwino mkati mwa gawo locheperako kutentha pogwiritsa ntchito mitundu yosiyanasiyana ya kapangidwe ka ma thermometers.

Onani ma thermometers atsatanetsatane mu tebulo ili m'munsimu:

Dziwani: Rtp ya ma thermometer omwe ali pamwambapa ndi 25±1.0Ω. M'mimba mwake wakunja kwa machubu a quartz ndi φ7±0.6mm. Fakitale yathu imapanganso thermometer ya platinamu yokhala ndi malo otentha a 83.8058K~660.323℃ ngati chida choyambira chogwirira ntchito.

II.Gwiritsani Ntchito Zambiri

1. Musanagwiritse ntchito, choyamba, yang'anani nambala ya thermometer kuti igwirizane ndi satifiketi yoyesera.

2. Mukagwiritsa ntchito, malinga ndi chizindikiro cha lug cha thermometer wire terminal, lumikizani waya molondola. Lug① ya waya wofiira imalumikizidwa ku current positive terminal; lug③ ya waya wachikasu, ku current negative terminal; ndi lug② ya waya wakuda, ku potential positive terminal; lug④ ya waya wobiriwira, ku potential negative terminal.

Chithunzi cha thermometer chili pansipa:

3. Mphamvu yamagetsi iyenera kukhala 1MA malinga ndi muyeso wa gawo la kutentha la thermometer.

4. Pofuna kufananiza chipangizo choyezera magetsi cha thermometer poyezera kutentha, potentiometer yocheperako ya giredi 1 ndi kukana kokhazikika kwa coil ya giredi 0.1 kapena mlatho woyesera kutentha kolondola komanso zowonjezera ziyenera kugwiritsidwa ntchito. Seti yonse ya chipangizo choyezera magetsi iyenera kutsimikizika kuti ili ndi mphamvu yosiyanitsa kusintha kwa ohm imodzi ya chikwi khumi.

5. Pakugwiritsa ntchito, kusunga ndi kunyamula, yesetsani kupewa kugwedezeka kwakukulu kwa thermometer.

6. Mukagwiritsa ntchito Thermometer ya Standard Platinum Resistance ya giredi yoyamba poyesa kutentha kwa Thermometer ya Standard Platinum Resistance ya giredi yachiwiri, muyenera kutsatira njira zotsimikizira zomwe zavomerezedwa ndi National Measurement Bureau.

7. Kuyesa kwa thermometer kuyenera kuchitika motsatira njira ndi malamulo oyenera otsimikizira.