Kev sib koom ua ke thoob ntiaj teb Thermocouple Qib Tolerance Standard Comparison rau Kub Runner Procurement

Kev sib xyaw ntawm kev siv tus ntoo khaub lig- hom khoom tuaj txawv teb chaws thiab cov thermocouples hauv tsev ua rau kev ntsuas qhov sib txawv tsis sib haum vim qhov txawv ntawm cov qauv kev sib txawv ntawm ntau lub tuam txhab. Peb lub ntiaj teb cov qauv tseem ceeb, ASTM E230 (Asmeskas), IEC 60584 (International) thiab GB / T 16839 (Suav lub teb chaws tus qauv), qhia meej qhov kev ua yuam kev sib txawv rau K, N, E, J hom thermocouples ntawm qhov sib txawv ntawm qhov kub thiab txias. Kev nkag siab txog qhov tsis sib xws ntawm kev kam rau siab yuav pab koj tsis lees txais cov sensors qis dua thiab tsim qauv kev kos duab rau kev ua siab ntev rau kev yuav khoom.

1. ASTM E230 (North American kub khiav hom: Husky, Pwm-Masters, DME)

Ob theem ntawm kev kam rau siab: Standard Qib thiab Tshwj xeeb txwv kev ua yuam kev (SLE).
• K hom: Li qub ± 2.2℃lossis ± 0.75% T, SLE ± 1.1℃lossis ± 0.4% T
• N- hom: Txheem ± 2.2℃lossis ± 0.75%T SLE ± 1.1℃lossis ± 0.4%T
• E- hom: Txheem ± 1.7℃lossis ± 0.5 %T SLE ± 0.9℃lossis ± 0.3 %T
• J hom: txheem ± 2.2℃lossis ± 0.75% T; SLE ± 1.1℃lossis ± 0.4% T

T txoj cai: T yog qhov kub khiav ceev uas muaj qhov ntsuas kub ntawm qhov degree. North American thawj thermocouple SLE qib meej yog feem ntau siv rau lub tsheb pwm thiab cov pwm kho mob.

2. IEC 60584 (Tebchaws Europe hom Günther, Hasco, Synventive; siab tshaj -kawg hauv tsev xa tawm thermocouples)

Chav Kawm 1 (high precision) Chav Kawm 2 (kev lag luam dav dav)
• Hom K/N: Chav Kawm 1 ± 1.5℃(tsawg dua lossis sib npaug li 400 degree); Chav Kawm 2 ± 2.5℃(tsawg dua lossis sib npaug li 400 degree)
• E Hom: Chav Kawm 1 ± 1.0℃( Tsawg dua lossis sib npaug 400℃) Chav Kawm 2 ± 2.0℃( Tsawg dua lossis sib npaug 400℃)
• J hom: Chav Kawm 1 ± 1.5℃(Tsawg dua lossis sib npaug 300 degree) Chav Kawm 2 ± 2.5℃(tsawg dua lossis sib npaug 300 degree)

European kub khiav txhawb nqa thermocouples yog Class 1 meej raws li lub neej ntawd rau txhua qhov kev kho mob thiab kub pwm tsim.

3. GB / T 16839 (Suav teb chaws tus qauv, IEC kev faib tawm sib npaug)

Chav Kawm I thiab Chav Kawm II, zoo ib yam li IEC Chav Kawm 1/Class 2, tus lej kam rau ua qhov tseem ceeb zoo ib yam rau IEC 60584. Cov pwm tuaj txawv teb chaws siv Class I hauv tsev siab -kawg lwm yam thermocouples; qis- cov khoom lag luam raug nqi feem ntau muab Chav Kawm II, tsis muaj cov neeg siv khoom tshwj xeeb.

Cov ntsiab lus tseem ceeb ntawm tus ntoo khaub lig- tus qauv sib piv tsis sib haum xeeb hauv kev siv hom khoom sib xyaw.

1. Ib qho SLE qib ASTM K- hom sensor (± 1.1℃max yuam kev) ua ke nrog IEC Chav Kawm 2 K- hom (± 2.5℃max yuam kev) ua rau tag nrho cov kev sib txawv ntawm mus txog 3.6℃hla ob kab noj hniav ntawm tib qhov ntau yam - kab noj hniav ua rau cov khoom sib xws.

2. Kev kam rau siab ntawm E- hom thermocouple yog qhov siab tshaj plaws ntawm cov qauv: ASTM SLE E- hom ± 0.9℃vs IEC Class 2 E- hom ± 2.0 degree, yooj yim ua rau pob tshab ib feem haze thiab rooj vag hlau kos duab flaws thaum sib tov ntawm valve gate pwm.

3. Qhov kub thiab txias qhov sib txawv: J- hom ASTM tus qauv kev ua haujlwm tau zoo yog siab li 750 degree, thaum IEC / GB J- hom kev txwv siab tshaj plaws tsuas yog 300 degree. Siv IEC J- hom sensors tshaj 320℃yuav ua rau muaj kev cuam tshuam loj dhau ntawm tus qauv kam rau ua.

Unified kos duab specification hauv kev yuav khoom kom tsis txhob yuam kev ntawm tus qauv mismatch. Thaum xaj cov thermocouples, nco ntsoov qhia cov qauv kev sib koom ua ke thiab qib siab, tsis yog tawm hauv qhov kev zam txim:
• Rau cov pwm ua raws li European / xa tawm siab- kev tsim khoom muaj tseeb: Qhia IEC 60584 Chav Kawm 1 (los yog GB / T 16839 Chav Kawm I)
• Rau kev hloov cov pwm qub hauv North America: Siv ASTM E230 SLE qib
• Rau qis-cov pwm pwm ntawm cov khoom siv hauv tsev: Tso cai rau IEC Class 2 / GB Class II

Cov qauv kev txwv tsis pub dhau tej zaum yuav txawv ntawm qhov sib txawv, thiab tsis siv los ntsuas qhov dhau / tsis ua haujlwm, tag nrho cov ntaub ntawv tuaj txog Thermocouple calibration yuav tsum muaj feem cuam tshuam rau cov txheej txheem. Yog tias cov thermocouples nrog cov qauv sib txawv sib xyaw ua ke hauv ib qho kub khiav manifold, muab tib tus qauv tib qib sensors ntawm cov kab noj hniav symmetric hauv kev sib zog kom tsis txhob muaj qhov kub thiab txias sib txawv ntawm sab laug thiab sab xis pwm kab noj hniav, ntsuas cov viscosity sib xws ntawm txhua qhov pwm.