主要技術參數(shù) | 熱電阻類型 | 測溫范圍℃ | 分度號 | 允許偏差△t℃ | wzp型鉑電阻 | -200~420 | Pt100 | B級(-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 | 熱電阻是利用物質在溫度變化時本身電阻也隨著發(fā)生變化的特性來測量溫度的。熱電阻的受熱部分(感溫元件)是用細金屬絲均勻地雙繞在絕緣材料制成的骨架上,當被測介質中有溫度梯度存在時,所測得的溫度是感溫元件所在范圍內介質層中的平均溫度. | 特 點 | 全國統(tǒng)一設計產品,接口尺寸通用,互換性好; | 采用裝配式結構,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不小于100MΩ | 裝配銅熱電阻的常溫絕緣電阻應不小于50MΩ | 常溫絕緣電阻的試驗電壓為10~100V DC。 | 自熱影響:鉑電阻允許通過的zui大電流為5mA,由此產生的溫升不大于0.3℃。 | 熱響應時間:在溫度出現(xiàn)階躍變化時,熱電阻的輸出變化至相當于該階躍變化的50%,所需要的時間,稱為熱響應時間,用τ0.5表示。 | 熱電阻時間常數(shù) | 熱惰性級別 | 時間常數(shù)(秒) | 熱惰性級別 | 時間常數(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:應不小于其保護套管外徑的8-10倍。 | 絕緣電阻:當周圍空氣溫度為15-35℃,相對濕度<80%時,絕緣電阻 20兆歐(電壓100V) | 。具有防濺式接線盒的絕緣電阻應2兆歐(電壓100V) | 熱電阻感溫元件在0℃ 時電阻值(R0)及其與在100℃ 時的電阻值(R100)比值: | 比值=R100/R | 分度號為Pt10、Pt100時;R100 /R0 =1.3850±0.001 | 分度號為Cu50、Cu100時;R100 /R0 =1.3850±0.0 | 熱電偶 WRE-230, WRE2-230, WRE-330, WRE2-330, WRE-430, WRE2-430, WREK-1313, WREK-1314, WREK-1315, WREK-1316, WREK-1323,. WREK-1324, WREK-1325, WREK-1326, WRNK-1313, WRNK-1314, WRNK-1315, WRNK-1316, WRNK-1323, WRNK-1324, WRNK-1325, WRNK-1326, WRN-001, WRE-001. WRN-002, WRE-002, WRN-235T, WRN2-235T, WRE-235T, WRE2-235T, WRN-130-F, WRN-230-F, WRN-330-F, WRN-430-F, WRN2-130-F, WRN2-330-F, WRN2-430-F, WRE-130-F, WRE-230-F, .WRE-330-F, WRE-430-F,WRE2-130-F,WRE2-230-F,WRE2-330-F.WRE2-430-F.WRN-130(*),WRN-230(*),WN-330(*),WN-430(*).,WRNN2-130(*),WNN2-230(*),WRNN2-330(*),WNN2-430(*),WREN-130, WREN-230, WREN-330, WREN-430, .WREN2-130, WREN2-230, WREN2-330, WREN2-430, WRNN-530(*),WRNN2-530(*),WREN-530,WREN2-530,WRNN-631(*),WRNN2-631(*),WREN-631, WREN2-631, WRN-12B, WRE-12B, WRN2-12B, 裝配式熱電偶WRE2-12B, WRN-13B, WRE-13B, WRN2-13B, WRE2-13B, WRN-14B, WRE-14B, WRN2-14B, WRE2-14B, WRN-15B, WRE-15B, WRN2-15B, WRE2-15B, WRN-15AB,. WRE-15AB, WRN2-15AB, WRE2-15AB, WRN-4318, WRE-4318,,WN2-4318, WRE2-4318, WRN-43C, WRE-43C, WRN2-43C, WRE2-43C, WRR-120, WRR-121, WRR2-120, WRR2-121, WRP-120, WRP-121, WRP2-120,, 熱電偶 WRP2-121, WRN-122, WRN-123, WRN2-123, WRR-130, WRR-131, WRR2-130, WRR2-131, WRP-130, WRP-131, WRP2-130, WRP2-131, WRN-133, WRN2-133, WRN-120, WRN2-120. WRE-120, WRE2-120, WRN-130, WRN2-130, WRE-130, WRE2-130, WRN-220, WRN-220A, WRN2-220, .WRN2-220A, WRE-220, WRE-220A,, WRE2-220A, WRN-230, WRN2-230, WRE-230, WRE2-230, WRN-220, WRN-220A, WRN2-220, WRN2-220A, WRE-220, WRE-220A, WRE2-220, WRE2-220A, WRN-230, WRN2-230, WRE-230, WRE2-230, WRN-320, WRN2-320, WRE-320, WRE2-320, WRN-330, WRN2-330, WRE-330, WRE2-330, 電壓繼電器 JY-40UC, JY-40C,JY-40UB,JY-40B,JY-40UA,JY-40A,DY-38,DY-37,DY-36,DY-35,DY-34,DY-33,DY-32,DY-31,DJ-132,DJ-122,DJ-112,DJ-131,DJ-121,DJ-111,BZY-1,BFY-10A,JY-3/2,JY-3/1,DY-4,LY-1A,JCDY-2A,JCDY-2, JY-40, HY-30,HY-20,HY-10,JY-30,JY-20,JY-10,LY-30,DY-30,DY-20CE,DY-20D,DY-20C,DJ-130/60CN,DJ-131/60C,JY-31B,JY-32B,JY-31A,JY-32A,JY-21B,JY-22B,JY-21A,JY-22A,JY-12B,JY-11B,JY-12A,JY-11A,JD-2C,JD-1C,JD-3A, JD-2A,JD-1A,JD-3B, JD-2B,JD-1B,BFY-13A,BFY-12A,BFY-11A,LY-37,LY-36,LY-35,LY-34,LY-33,LY-32,LY-31,DY-25C,DY-24C,DY-23C,DY-22C,DY-21C, 電流繼電器 DL-34,DL-33,DL-32,DL-31,DL-13,DL-12,DL-11,JL-30,JL-20,JL-10,DL-30,DL-20CE,DL-10,JL-2A,JL-2B, JL-2C, JL-1A,JL-1B, JL-1C, JL-33A,JL-33B, JL-33C, JL-32A,JL-32B, JL-32C, JL-31A,JL-31B, JL-31C, JL-23A,JL-23B, JL-23C, JL-22A,JL-22B, JL-22C, JL-21A,JL-21B, JL-21C, JL-13A,JL-13B, JL-13C,JL-12A,JL-12B, JL-12C,JL-11A,JL-11B, JL-11C,DL-20C, DLS-40,JT3-12L,JT3-31/5,JT3-22/5,JT3-03/3, JT3-13/3,JT3-22/3,JT3-40/1,JT3-12/1,JT3-22/1,JT3-21/5,JT3-20/5,JT3-11/5,JT3-02/3,JT3-20/3,JT3-11/3,JT3-04/1,JT3-30/1, 電磁繼電器 LY4,LY3,LY2,LY1,MY4,MY3,MY2, JQX-10F/3Z,JQX-10F/2Z,JTX-3C,JTX-2C,JQX-13F/4Z, JQX-13F/3Z, JQX-13F/2Z,HH-54P,HH-53P,HH-52P,HH-64P,HH-62P,F(xiàn)K-2P-I,MK-3P-I,MK-2P-I, |