主要技術(shù)參數(shù) | 熱電阻類型 | 測(cè)溫范圍℃ | 分度號(hào) | 允許偏差△t℃ | wzp型鉑電阻 | -200~420 | Pt100 | B級(jí)(-200~800℃)允差±(0.30+0.005/t/) | *(-200~650 ℃ ) 允差±(0.15+0.002/t/) | WZC型銅電阻 | -150~100 | Cu50 | -50~100℃允差 | | | | | | | 工作原理 | 熱電阻是利用物質(zhì)在溫度變化時(shí)本身電阻也隨著發(fā)生變化的特性來測(cè)量溫度的。熱電阻的受熱部分(感溫元件)是用細(xì)金屬絲均勻地雙繞在絕緣材料制成的骨架上,當(dāng)被測(cè)介質(zhì)中有溫度梯度存在時(shí),所測(cè)得的溫度是感溫元件所在范圍內(nèi)介質(zhì)層中的平均溫度. | 特 點(diǎn) | 全國(guó)統(tǒng)一設(shè)計(jì)產(chǎn)品,接口尺寸通用,互換性好; | 采用裝配式結(jié)構(gòu),零件分解性好,維修方便; | 更換易損件成本低; | 規(guī)格齊全,性能穩(wěn)定可靠。 | 絕緣電阻 | 裝配鉑熱電阻的常溫絕緣電阻應(yīng)不小于100MΩ | 裝配銅熱電阻的常溫絕緣電阻應(yīng)不小于50MΩ | 常溫絕緣電阻的試驗(yàn)電壓為10~100V DC。 | 自熱影響:鉑電阻允許通過的zui大電流為5mA,由此產(chǎn)生的溫升不大于0.3℃。 | 熱響應(yīng)時(shí)間:在溫度出現(xiàn)階躍變化時(shí),熱電阻的輸出變化至相當(dāng)于該階躍變化的50%,所需要的時(shí)間,稱為熱響應(yīng)時(shí)間,用τ0.5表示。 | 熱電阻時(shí)間常數(shù) | 熱惰性級(jí)別 | 時(shí)間常數(shù)(秒) | 熱惰性級(jí)別 | 時(shí)間常數(shù)(秒) | Ⅰ | 90-180 | Ⅲ | 10-30 | Ⅱ | 30-90 | Ⅳ | 10 | | | 熱電阻的公稱壓力:一般是指在工作溫度下保護(hù)管所能承受的靜態(tài)外壓而不破裂。 | 熱電阻zui小插入深度:應(yīng)不小于其保護(hù)套管外徑的8-10倍。 | 絕緣電阻:當(dāng)周圍空氣溫度為15-35℃,相對(duì)濕度<80%時(shí),絕緣電阻 20兆歐(電壓100V) | 。具有防濺式接線盒的絕緣電阻應(yīng)2兆歐(電壓100V) | 熱電阻感溫元件在0℃ 時(shí)電阻值(R0)及其與在100℃ 時(shí)的電阻值(R100)比值: | 比值=R100/R | 分度號(hào)為Pt10、Pt100時(shí);R100 /R0 =1.3850±0.001 | 分度號(hào)為Cu50、Cu100時(shí);R100 /R0 =1.3850±0.0 | 裝配式不銹鋼接線盒鉑電阻WZPK-125U,WZPK-126U,.WZPK-223U,WZPK-224U,WZPK-225U,WZPK-226U,WZPK-323U,WZPK-324U,WZPK-325U,WZPK-326U,WZPK-423U,WZPK-424U,WZPK-425U,WZPK-426U,WZPK-523U,WZPK-524U,WZPK-525U,WZPK-526U,WZPK-163U,WZPK-164U,WZPK-165U,WZPK-166U,WZPK-263U,WZPK-264U,WZPK-265U,WZPK-266U,WZPK-363U,WZPK-364U,WZPK-365U,WZPK-366U,WZPK-463U,WZPK-464U,WZPK-465U,鎧裝鉑電阻WZPK-466U,WZPK-563U,WZPK-564U,WZPK-565U,WZPK-566U,.WZPK-173U,WZPK-174U,WZPK-175U,WZPK-176U,WZPK-273U,WZPK-274U,WZPK-275U,WZPK-276U,WZPK-373U,WZPK-374U,WZPK-375U,WZPK-376U,WZPK-473U,WZPK-474U,WZPK-475U,WZPK-476U,WZPK-573U,WZPK-574U,WZPK-575U,WZPK-576U,WZPK-103S,WZPK-104S,WZPK-105S,WZPK-106S,WZPK2-105SA,WZPK2-106SA,WZPK-203S,WZPK-204S,WZPK-205S,.WZPK-206S,WZPK2-205SA,WZPK2-206SA,WZPK-303S,化工隔爆型熱電阻WZPK-304S,WZPK-305S,WZPK-306S,WZPK2-305SA,.WZPK2306SA,WZPK-403S,WZPK-404S,WZPK-405S,WZPK-406S,WZPK2-405SA,WZPK2406SA,WZPK-503S,WZPK-504S,WZPK-505S,WZPK-506S,WZPK2-505SA,WZPK2506SA,WZPK-123S,WZPK-124S,WZPK-125S,WZPK-126S,WZPK2-125SA,WZPK2-126SA,WZPK-223S,WZPK-224S,WZPK-225S,WZPK-226S,WZPK2-225SA,WPK2-225SA,WZPK2-226SA,WZPK-323S,.WZPK-324S,WZPK-325S,WZPK-326S,WZPK2-325SA,WZPK2326SA,WZPK-423S,WZPK-424S,WZPK-425S,WZPK-426S,WZPK2-425SA,.WZPK2426SA,WZPK-523S, 試驗(yàn)器: SYP1001B-2, SYP1001B-5, SYP1002B-2, SYP1002-3, SYP1003-6, SYP1003-6A, SYP1003-6B, SYP1003-6E, SYP1003, SYP1003-7, SYP1003-7A, SYP1003-7B, SYP1003-7D, SYP1003-9, SYP1003-9A, SYP1003-9B, SYP1004-3, SYP1008-3C, SYP1008-3E, SYP1003-8, SYP1010-2, SYP1013, SYP1015-1, SYP1015-3, SYP1016-1B, SYP1016-1C, SYP1016-2C, SYP1016-2D, SYP1016-2E, SYP1016-2F, SYP1017-1,SYP1021, SYP2000-1, SYP1022-2A, SYP1022-2C, SYP1022-2D, SYP1022-1C, SYP1023, SYP1024, SYP1025, SYP1026, SYP1026-1, SYP1027, SYP1027-1, SYP20013A, SYP2001-3B, SYP2001-3C, SYP2007-1, SYP3006-1, SYP3007B-2, SYP3008, SYP3010-1, SYP3013, SYP4100-1, SYP4101, SYP4101-1, SYP4101-A, SYP4101-B, SYP4106-1, XSP, SYP4108, SYP4111-2, SYP4202-1, SYP4301-2, SYP7004-1, SYP7005, ZL-2, SYP9000, SYP9001A, SYP9001B, SYP9002B-1, SYP9002-1, SYP9003-2, SYP9010, SYP9012, SYP2102, 測(cè)汞儀: F732-V, F732-VJ, F732-S, F732-G, ZYG-11, DHL-2, DHL-3, DHL-4, DHL-100, DHL-200, DHL-300, HL-2D, HL-6D, HL-7D, HL-2B, HL-3B, HL-4B, HL-5B, HL-6B, HL-7B,HL-100B, HL-200B, HL-300B, HL-600B, HL-2, HL-3, HL-4, HL-5, HL-6, HL-7, HL-100, HL-200, HL-300, HL-600, DHL-A, HDL-B, HL-1, HL-1B, HL-1S, HL-2, HL-2B, HL-2D, HL-2S, HL-3, HL-3B, HL-4, HL-4B, HL-4D, HL-5, HL-5A, HL-5B, HL-6, HL-6B, HL-6D, BT-100, BT-100B, BT-100D, BT-200, BT-200B, BT-600, BT-600B, T-600C, HL-2N, BT-100N, 顆粒測(cè)定儀: LKY-2, PME1,PME, 粘度計(jì): NDJ-1,NDJ-4,NDJ-5,NDJ-8SN,NDJ-9SN,SNB-1,SNB-4,DV-1,NDJ-7,NDJ-5S,NDJ-8S,NDJ-79,NDJ-1B,NDJ-1B-1, NDJ-99, NDJ-1C, NDJ-1D, NDJ-1F, NDJ-1E, 水分測(cè)定儀: LHS16-A, DHS16-A, SH-10A, SC69-02C, EMA-100, EMA-50, EMA-20, SC-10, MA35, MA150, MA100, MB35, MB45, MB23, MB25, KF-1, KF-1A, KF-1, KF-1B, LDS-IG, LDS-IH, LDS-IF, LJDS-I, LDS-IY, LDS-IK, LDS-IS, LDS-2G, LDS-2A, LDS-2, LDS-3H, LJS-IA, LJS-IB, LMS-30, LTJM-2008, LTJM-8, LTJM-3, 電導(dǎo)率儀,: FE20K,FE20,FE30K,FE30,FG2-B,FG2-ELK,FG2-FK,FG3-B,FG3-ELK,FG3-FK,SG2-B,SG2-ELK,SG2-T,SG2-FK,SG2-ASK,SG3-B,SG3-ELK,SG3-ELK740SG,SGE-FK2,SG3-FK10,SG3-ASK,SG6-ELK,SG6-FK2,SG6-FK10,SG6-ASK,SG7-B,SG7-ELK,SG7-ELK740SG,SG7-FK2,SG7-FK10,SG7-ASK,SG8-B,SG8-ELK,SG8-FK,SG8-ASK,S20K,S20,S30K,S30,S40K,S40,S40N,PB-10,PB-21,PT-10,PT-10P,PP-15-P11,PP-20-P11,PP-25-P11,PP-50-P11,DDS-307,DDS-307A,DDSJ-308A,DDSJ-318,DDBJ-350,DDB-303A,DDS-11D,TM-03,DDS-11C,DDS-11A,DDG-5205A,DDG-33,DDG-330,DDD-32D ,DCG-760A,DDB-1,DDB-2,DDB-11A,DDC-11C, PH計(jì),酸度計(jì): PHS-3D,PHS-3C,PHS-3E,PHS-3B,PHSJ-3F,PHSJ-4A,PHSJ-5,PHS-25,PHS-2F,PHBJ-260,PHB-4,PHS-29A,PHS-4,PHS-3CT, PHS-2C, PHB-5,PHC-2,PHC-2000, 實(shí)驗(yàn)室溶解氧: JPB-607,JPB-607A,JPB-608,JPSJ-605,SJG-9435A, 實(shí)驗(yàn)室離子計(jì): PXS-270,PXSJ-216,PXSJ-226,PXS-215,DWS-51,DWS-51-1,DWS-295,DWS-296, 實(shí)驗(yàn)室滴定儀: ZDY-500,ZD-2,ZDJ-4A,ZDJ-5,ZYT-1,ZYT-2,ZSD-1,ZSD-2,ZSD-2J,ZD-3A, 分析儀: DZS-706,DZS-707,DZS-708,DZS-718,COD-571,COD-571-1,COD-572,KLS-411,ZDY-501,44B,ZF-2,ZF-2C,ZB-1C, GXG-201, 紫外分析儀: ZF-I, ZF-20C, ZF-20D, ZF-401A, ZF-401B, ZF-501A, ZF-501B, ZF-90A, ZF-90B, ZF-7A, ZF-7B, ZF-7C, ZF-7D, ZQJ-254, ZF-4, WFH-203B, WFH-204A, WFH-204B, WFH-204, WFH-201BJ, WFH-201B, WFH-202B, WFH-201A, WFH-202, WFH-205B, HD-9706, HD-9707, HD-9704, HD-9705, HD-1, HD-2, HD-3, HD-4, HD-5, HD-A, HA-B, HD-S, ZF-C, ZF-5, |