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选有代表性的市售常见数显温控仪表 ,对温度漂移情况进行检测。结果表明 ,当被测仪表工作环境温度升高到 3 0℃以上及降至 0℃以下时 ,4种不同厂家生产的同类仪表 ,其测量值和设定值都开始受影响 ,温度漂移幅度增大。根据检测的温度漂移幅度大小及方向 ,可采取保温、升温、遮阳、通风、校正、增设单元电路等办法 ,来保证仪表的测控精度不受影响。
Select a representative of the common digital temperature controller on the market, the temperature drift test. The results show that when the working temperature of the tested instrument rises above 30 ℃ and drops below 0 ℃, the measured values and set values of the same kind of instruments produced by 4 different manufacturers begin to be affected, and the temperature drift increases by Big. According to the magnitude and direction of the detected temperature drift, thermal insulation, temperature rise, sunshading, ventilation, calibration and additional unit circuits may be adopted to ensure the accuracy of the measurement and control of the instrument is not affected.