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 | 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,, 測(cè)距儀 激光測(cè)距儀:TM1500,TM1000,TM800,TM600,DLE50,DLE150,LRM1200,LRM-1500,F(xiàn)421D,F(xiàn)411D,PD4,PD40,PRO1500,PRO600,PRO440,PRO6000,PR20,PML32-R,PMP34,PRI2,RL350GL,RL250GL,S2,D2,D3,A5,D5,A6,A8 ,Prexiso X2 ,Impulse 200 ,Impulse 200LR ,Impulse 200XL ,PD-4,PD-42 ,PD-40 ,NM-500,NM-600,NM-700,NM-1200,NM-1500,1200S,超聲波測(cè)距儀:ST820,ST822,AR-811,AT-831,AR-841,AR-851,測(cè)距儀:VC850,VICTOR 851,600VR,600VH,1500VR,1500VH,1500VR/VH,1000VR/VH,800VR/VH,600VR/VH , 測(cè)高儀 6000E,2000E,SIR-600E,600E,AR-600E ,CHM6000, 照度計(jì) 紫外照度計(jì):TN-340,ST510,ST512,ST513,TN2340,YK-34UV,BK-8732,UVAB513,UV-365HA,UV-340A,UVA-365,UVC-254,YK-35UV,UV-365,照度計(jì):DE-350,VA-8050,AK-820,* 3640-20,* 3423,MS6610,* 5202,* 5201,F(xiàn)941,MS6610,BK-8332,BK-8630,BK8731,BK-8331,LX-101A,LX-102,LX-107,DT1308,DT1309,DT8809,DT8809A,VICTOR 1010,LX101,TES-1330A,* 3640-20,AR-813,AR-823,DT-8808,TES-1332,TES-1334,TES-1336,LX-9621,LX-9626,原子吸收分光光度計(jì):LAB800,LAB700,LAB600M,LAB600H,LAB600,LAB500,LAB400,LAB300,LAB200,LAB100,HG--9602A,HG—9602,HG--9602B,HG—9601,數(shù)字照度計(jì):DE-3351,DE-3350,LX-1102,LX-105,LX-103 ,UT-381,UT-382,TES-1335,TES-1339,TN-1330,YF-1065,YF-170,CENTER-337, 風(fēng)速計(jì) SUMMIT-555,SUMMIT-556,SUMMIT-565,SUMMIT-575,SUMMIT-350,KANOMAX-6162,KANOMAX-6004,KANOMAX 6631-P, KANOMAX- 6113,,KA41L, KA41I, KA32L, KA32I, KA321, KA32L, KA41I , KA41L, KA22,KA31,KA12,KA1I, TM-856,TM-826,TM816 ,YK-2005LX,YK-2005AH,YK-80AP,YK-80AM ,LM-81AM,LM-8000, TN-2424,TN-2426,TN-2481,TN-2204,TN-2480,TN-2423,TN-2381,TN-2400,AM-4200,AM-4206M ,AM-4204,AM-4206 ,AM-4203HA,AM-4203M ,AM-4203,AM-4201,AM-4202,AM-4216, AM-4213,AM-4204HA , AM-4205A, AM-4214HA, AM-4220,DT618,DT619,DT620,DT-8893,DT-8880,,DT-8894, TM-209,TM-404,TM-403,TM-401, SYT-2000V , UT-361, UT-362, TESTO 410-1,TESTO 410-2 ,TESTO 405-V1,F925,AVM-07,AVM-303,AVM-03,AVM-05,AVM01,AVM-301,VA8021 ,VA8022,VA8020,BK8360,BK8361,AZ8901,AZ8904,AZ8906,AZ8909,AZ8910,AZ9871 ,AR-816 ,AR-826,AR-836,AR-846,AM-4822,AM-4836,AM-4838,AM-4812,AM-4826,AM-4832 ,AK-02,AK03,TM-209,TM-404,TM-403,TM-401, |