Yudian temperature control instrument, PV display value fluctuates greatly, how should it be processed to check whether the sensor input adopts shielded wire, only the short distance and no interference or low interference environment can use unshielded wire as input; check whether the sensor works normally; Some thermocouples do not do well inside the insulation, causing the negative pole of the thermocouple to collide with the outer casing. Unless it is used for a leaky thermocouple that requires very fast temperature sensing speed, it is recommended not to use such a thermocouple with the negative electrode and the outer casing. Such thermocouples cannot be used for multi-channel measurement common to the negative electrode, and leakage of the furnace insulation material at high temperatures will not only cause fluctuations in measured values ​​but also affect system safety. If the measurement speed is not high, the filter parameters of the meter can be set as necessary to appropriately reduce data fluctuations.
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