The maintenance of temperature transmitter

Bimetallic thermometer is the practice of the field temperature measurement tools, and is responsible for the thermocouple or heat resistance temperature transmitter of millivolt signal or resistance signal is converted into a standard voltage or current signal. We are paying attention to the use of the thermometer at the same time, it can't be ignored is the intermediate temperature transmitter transmission equipment maintenance. Due to the smaller body temperature transmitter, in the aspect of maintenance is more fine than that:

1, the different models according to the manual wiring, temperature transmitter with explosion-proof instrument of intrinsically safe circuit wiring must not wrong, and I will carefully check whether there is a short answer or wrong.

2, when using the temperature transducer, it is important to pay special attention to the common model with the Ann model, ordinary cannot be installed in the danger zone, the Ann model can be installed in the danger zone.

3, thermal resistance converter input for three-wire system lines each connecting wire resistance should be equal and at the same temperature.

4, for explosion-proof instrument in principle is not allowed to remove the intrinsically safe circuit components and exchange instrument connection, such as the need to change, should be conducted according to the requirements of explosion-proof.

5, regular check, in order to accurately read out data, to between the output terminal, connect digital voltmeter measurement, and do not remove the intrinsically safe route back.

6, instrument malfunction, check should be a power outage, unknown fault shall not send.

7, the temperature transducer in the operation should be kept clean, not suitable for long-term use condensation and serious chemical pollution environment, to save in the dry environment. Sensors have oil, can use special cleaner ( Inquire) 。 Special corrosion temperature and humidity sensor can be applied to less than 100 PPM concentration of acid and alkali environment.