流量变送器耐高温对策

Countermeasures of High Temperature Resistant for Flow Transmitters

流量变送器在化工领域的应用十分广泛。为确保流量变送器能够在高温工业现场正常运行,在出厂前必须通过耐高温测试。以基于DSP的科氏质量流量变送器为例,分析其发热原因和热传导路径,并从芯片选择和使用、电路设计和布局等方面研究耐高温对策。高温试验表明,耐高温对策简单、可行,能有效降低系统功耗、改善散热性能。

Flow transmitters are widely used in chemical industry. To ensure these flow transmitters work normally in high temperature industrial site, high temperature test must he included in ex-faetory test of transmitter. Take the DSP based Coriolis mass flow transmitters as the example, the causes of getting hot and heat conduction path are analyzed, and the strategies of high temperature resistance are researched from chip selection and usage, circuit design and layout. The high temperature test shows that the high temperature resistance strategy is simple, feasible, and can reduce the power consumption and improve the heat dispersion effectively.