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图1是一个热电偶参考端接地线路。本电路在这里一方面可以精确和线性放大非常低的热电偶输出电压,而且可以作为热电偶参考端接地的信号调节放大器应用。具体校准步骤:首先预热5—10分钟使REF一01,AD592cN和op—177A稳定,将热电偶放入冰槽内,调节R_1,使得V_(oui)输出电压等于0V。其次将热电偶放入一个热的环境温场中,调节R_2,校准V_(0uT)也可以施加一个代替热电偶输出的电压来校准,它包括放大器的失调电压、温度传感器和电阻的校正,以及热电偶放大器增益的校正。
Figure 1 is a thermocouple reference ground line. This circuit here on the one hand can be precise and linear amplification of very low thermocouple output voltage, and can be used as thermocouple reference ground termination signal conditioning amplifier applications. Specific calibration steps: First warm-up 5-10 minutes REF-01, AD592cN and op-177A stable, the thermocouple into the ice tank, adjust R_1, so that V_ (oui) output voltage is equal to 0V. Second, place the thermocouple into a hot ambient temperature field. Adjust R_2. Calibrating V_ (0uT) can also be calibrated by applying a voltage instead of the thermocouple output. This includes the amplifier’s offset voltage, the temperature sensor and resistance correction, and Calibration of the gain of the thermocouple amplifier.