Abstract

A digital thermometer is described in which the use of a modified null method has significantly reduced the impact of changes in the gain of the measuring path on the measurement accuracy. Autoregulation of the zero balance in the thermometer is performed using two types of pulse modulation: amplitude and pulse-width. For a 12-bit digital output code and a measurement resolution of 0.037°С, the integral value of the nonlinearity error did not exceed ±0.1°С in the temperature range of 100–250°С.

中文翻译：

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简单的数字温度计

摘要

描述了一种数字温度计，其中使用改进的零位方法已大大减少了测量路径的增益变化对测量精度的影响。温度计中零平衡的自动调节是使用两种类型的脉冲调制来执行的：幅度和脉冲宽度。对于12位数字输出代码和0.037°С的测量分辨率，非线性误差的积分值在100–250°С的温度范围内不超过±0.1°С。