具体的排查步骤： 检查温度巡检仪输入端的温度传感器是否正常。如果是热电阻，先将热电阻拆下来，再用万用表量不同颜色线之间的阻值，如果是热电偶，直接用万用表测量mV值，再对比下分度号就能知道传感器是否正常。 第2步，检查仪表的接线，首先是看温度巡检仪的接线端子有没有错，再检查是否有接触不良的情况。热电阻接A和B.C；热电偶和电压接B+和C-；电流接A+和C-。 第3步，检查温度巡检仪的参数设置，对显示有影响的参数有信号类型，量程，修正参数，冷端补偿等，检查下这些参数是否设置正确（IA是零点修正、FI是满度修正、It是输入信号选择……）。

Specific troubleshooting steps: Step 1, check whether the temperature sensor at the input end of the temperature inspection instrument is normal. If it is a thermistor, first remove the thermistor, and then use a multimeter to measure the resistance value between different colored lines. If it is a thermocouple, directly use a multimeter to measure the mV value, and then compare the graduation number to determine whether the sensor is normal. Step 2, check the wiring of the instrument. First, check if the wiring terminals of the temperature inspection instrument are correct, and then check for any poor contact. Thermal resistance connected to A and B C; Thermocouples and voltage are connected to B+and C -; Connect the current to A+and C -. Step 3, check the parameter settings of the temperature inspection instrument. The parameters that affect the display include signal type, range, correction parameters, cold end compensation, etc. Check if these parameters are set correctly (IA is zero correction, FI is full scale correction, It is input signal selection...).