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具體的排查步驟： 檢查溫度巡檢儀輸入端的溫度傳感器是否正常。如果是熱電阻，先將熱電阻拆下來，再用萬用表量不同顏色線之間的阻值，如果是熱電偶，直接用萬用表測(cè)量mV值，再對(duì)比下分度號(hào)就能知道傳感器是否正常。 第2步，檢查儀表的接線，首先是看溫度巡檢儀的接線端子有沒有錯(cuò)，再檢查是否有接觸不良的情況。熱電阻接A和B.C；熱電偶和電壓接B+和C-；電流接A+和C-。 第3步，檢查溫度巡檢儀的參數(shù)設(shè)置，對(duì)顯示有影響的參數(shù)有信號(hào)類型，量程，修正參數(shù)，冷端補(bǔ)償?shù)?，檢查下這些參數(shù)是否設(shè)置正確（IA是零點(diǎn)修正、FI是滿度修正、It是輸入信號(hào)選擇……）。
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...).
