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环境因素对称重仪表造成的影响有哪些？

作者:衡安称重软件公司来源:衡安称重软件发布于:2014年01月5日

　　环境对称重传感器造成的影响主要有以下几点：
　　1、高温环境对传感器造成密封材料及焊点熔化、弹性体和应变计内应力发生结构变化等问题。对于高温环境下工作的传感器常采用耐高温传感器；另外，苛刻的场合还须加有隔热、水冷或风冷等装置。
　　2、粉尘、湿热对传感器造成较大的影响。在此环境条件下应选用密闭性很高的传感器。不同的传感器其密封的方式是不同的，其密闭性存在着很大差异。常见的密封有密封胶充填或涂覆；橡胶垫机械紧固密封；焊接（激光焊接、氩弧焊、等离子焊等）和抽真空充氮密封。从密封效果来看，焊接密封为最佳，充填密封胶为较差。对于室内干净、干燥环境下工作的传感器，可选择充填密封胶密封的传感器，而对于一些在潮湿、粉尘性较高的环境下工作的传感器，应选择膜片热套密封或膜片焊接密封、抽真空充氮的传感器。
　　3、在腐蚀性较高的环境下，如潮湿、酸性对传感器造成弹性体和附件受损、腐蚀等影响，应选择外表面进行过喷塑或不锈钢弹性体及不锈钢外罩，抗腐蚀性能好且密闭性好的传感器。
　　4、电磁场对传感器输出信号干扰的影响。在此情况下，应对传感器的屏蔽性进行严格检查，看其是否具有良好的抗电磁干扰能力。

　　5、易燃、易爆不仅对传感器造成彻底性的损害，而且还给其它设备和人身安全造成很大的威胁。因此，在易燃、易爆环境下工作的传感器对防爆性能提出了更高的要求，故必须选用防爆传感器，这种传感器的密封外罩不仅要考虑其密闭性，还要考虑到防爆强度，以及电缆线引出头的防水、防潮、防爆性等。

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