Consultation:Cherry Lee Add:Shangchegang Industrial,Hengli Twon, Dongguan City,Guangdong Province, China
Temperature control switch temperature detection method
Release time:2018-11-20 21:18 views:
温控开关温度检测设备:焗炉,温控开关配件热电偶温度计,皱纹胶纸,显示通|断的LED。
1.将温控开关置于烘箱内进行试验,试验箱的空气流速不小于200m/min,温场内部温度保持均匀(最佳方式为烘箱底部安装发热电阻,发热电阻上端水平装配鼓风扇,启动烘箱开始加热时同时打开鼓风系统以确保温场内部温度均匀);
2、把温控开关的两端子脚接入LED工装上,用LED灯指示通|断状态,通过温控开关的电流不超过0.01A;
3.在试验中升高空气温度,在空气温度大约低于额定断开温度下限温度10K时的温度变化率不超过0.5K/min,至温控开关动作。降低空气温度,在大约高于复位温度上限温度 10K 时的温度变化率不超过0.5K/min,直至温控开关复位重新接通回路(因为保护器与水银表的感温速率不一样,升温或降温速率过快会导致测试数据不准确);
4.测温探头(热电偶或水银温度计液泡)尽可能靠近温控开关,并与风扇平行(最佳方式将温控开关感温端轻绑于水银表液泡上,保持水银表实测值与温控开关实际温度值一致)。
5.产品在测试时感温端处除水银表液泡外无其他任何物体紧贴,因为其他物体的吸热,容易导致保护器温度滞后。
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