Pipe temperature temperature sensor manufacturers to inquire

Temperature temperature sensor fault analysis and treatment method of

temperature caused by temperature sensor failure

this is a common and good judgment of fault. In use process, once appear abnormal temperature temperature sensor output, first check whether temperature temperature sensor failure. In the temperature under the condition of normal temperature sensor circuit, there are several ways.

（ 1) The temperature of the temperature sensor circuit. Temperature temperature sensor has the temperature fuse alarm function, at this time regardless of the temperature sensor front end is the thermal resistance and thermocouple, will show the temperature sensor output value is less than standard signal that is less than 4 ma. The current standard fuse alarm current is 3. 75 ma, when the temperature of the test temperature sensor output, the multimeter display the current value of 3. 75 ma, at the same time, the temperature sensor module in the red light flashing, can determine the temperature of the temperature sensor circuit, replace the front-end probe can be solved.

some customers because of the upper instrument difference, have special request for current fuse alarm, factory can be customized, such as requiring fuse alarm current is less than 3 ma, in the case of guarantee accuracy can do 2. 95 ma, is even lower.

（ 2) Short circuit temperature temperature sensor. The temperature temperature sensor output value generally no law, is an outlier, can be understand as 'noise' in the software. In fact because of short circuit temperature temperature sensor, after a constant current source excitation into the MCU voltage could be a abnormal voltage value, then after a series of AD conversion, amplification, DA conversion, the output is an abnormal value. Well if the front-end circuit processing, temperature temperature sensor module will not damage, dealing with bad circuit module will be damaged.

（ 3) Temperature temperature sensor 'empty empty short'. This kind of situation usually temperature and normal temperature sensor, sometimes is not normal. Most the reason of temperature temperature sensor encapsulation quality problem, replacement of the probe can be solved.

working principle of the temperature sensor temperature

current temperature sensor is the temperature of the temperature sensor signal into current signal, connected to the secondary instrument, which showed the corresponding temperature. Temperature thermocouple, heat resistance temperature sensor used as the temperature measuring element, from the output signal of temperature measuring element to the temperature sensor module, after filtering, arithmetic amplifier, nonlinear correction, V/I conversion, constant current and reverse protection circuit processing, convert and a linear relationship with temperature of 4 ~ 20 ma current signal output.

the temperature of the temperature sensor installation requirements

1, before installation, check whether the parts is complete, the fasteners for loose, tighten the antenna.

2, when installation, pay attention to the light to take light put, do not knock, it broke. Tighten the antenna can work normally after

3, after installation, after power up, prohibit the operation personnel to open the front cover, such as wrong operation, operators do not save, reopened when the power is cut off.

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