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智能温度控制仪表的选型

2018-01-06 09:17:00 奥仪电器 130

上海奥仪电器有限公司

智能温度控制仪表选型举例:

  (1)炉温控制。炉温控制范围300℃~1000℃,380V三相电阻丝加热,功率为50kW,要求波动度在5℃左右。

  建议选用K偶数字显示二位式测量控制仪表,其量程为0℃~1200℃,分辨力1℃,继电器动作滞后1℃~2℃。选用K型偶,在1000℃温度下可以长期工作,位式控制,外部只需一只三相交 流接触器即可工作。控制触点的动作范围是± (1~2)℃,再加上炉温测量的滞后,炉温的波动度也基本可以控制在要求范围内。

  (2)恒温箱控温。要求测控温范围为100℃~400℃ ,220V单相电阻丝加热,功率为3kW,温度稳定性要求达到±0.5℃。

  由温度稳定指标,选用位式控制已不能满足恒温要求。可选用TMC300型温度测控仪或其他同类产品。仪表采用钼电阻作为温度检测元件,测控温范围-50.0℃~600.0℃,分辨力0.1℃,测量精度0.2%,控制方式采用连续调节占空比。外部器件只须配?#21491;?#21482;单相的30 A/220 V固态继电器。对于封闭的恒温箱的温度控制,其恒温指标可 达到±(0.1~0.3)℃。


asp时时彩源码开后门
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