产品型号:	CWF精密型NTC测温系列	原产地:	深圳
详细说明	一、技术参数(Technical parameters) 1.1标称电阻值:R25=47.00KΩ±1%;   Rate zero-resistance value: R25=47.00KΩ±1%; 1.2B值参数:B25/50=3950K+1% B  value:B25/50=3950K+1% 1.3绝缘电阻:空气中500VDC,大于100MΩ;  Insulation resistance :100MΩMin,500VDC in air 1.4耐电压:空气中,在传感器外壳与导线之间施加1800VAC,3秒、无闪络、击穿现象；   Puncture voltage: no flash and breakdown.1800VAC, 3S,between coating and line ,in air . 1.5耗散系数(δ):不小于4.2mW/℃;   Dissipation constant(δ):4.2mW/℃over; 1.6热时间常数(τ): 15S  Thermal time constant (τ):15S 1.7使用温度范围:-50℃-+250℃;  Operation temperature range:-50℃-+250℃; 二、可靠性试验: (Reliability tests) 2.1高温存储Hot temperature storage   将传感器存放于180℃+5℃干燥环境中,1000hrs后,测试其电阻值R25、B值,   Store in hot still air at 180℃+5℃ for 1000hrs.|△R/R|≤3%,|△B/B|≤1%;  and test |△R/R|≤3%,|△B/B|≤1%; 2.2低温存储（Low temperature storage） 将传感器存放于-30℃-+5℃干燥环境中,1000hrs后,测试其电阻值R25、B值,   Store in dry still air at –30℃-+5℃ for 1000hrs,|△R/R|3%,|△B/B|1%;And test |△R/R|≤3%,|△B/B|≤1%; 2.3冷热冲击试验:  (Thermal shock test) 将传感器存放于-30℃干燥环境(10mins)   室温环境(5mins)   100℃空气(100mins)    室温环境(5mins),如此循环1000次后,测试其电阻值R25,B值, After 1000cycles of-30℃ dry air(10mins) room ambient temperature(5mins)   100℃dry air (10mins)   room ambient temperature(5mins).and test∣△R/R∣≤3%,∣△B/B∣≤1% 2.4高温高湿:  (High humidity and High temperature storage)  将传感器存放于95%RH, 70℃环境中,1000hrs后,测试其电阻值R25,B值, Store in95%RH, 70℃air conditions for 1000hrs and test∣△R/R∣≤3%,∣△B/B∣≤1%