Integrated temperature sensor temperature manufacturers welcome the calls

Temperature temperature sensor fault analysis and treatment method of

electromagnetic interference problems

motors, large machinery, reaction kettle, electric equipment, transmission lines, radio, or even the casual after can produce large equipment of electromagnetic field, the basic can have conduction or radiation of electromagnetic wave, there are many different kinds of electromagnetic interference and can't. Therefore, experienced engineers and technicians in the field should carefully analyze their field environment, take necessary measures. At the beginning of the design, the electromagnetic interference as the key of prevention, to nip in the bud, efforts to reduce the trouble in the process of subsequent use.

the temperature of the temperature sensor technology performance index

temperature temperature sensor is a kind of converting temperature variables can transmit the standardization of the output signal of the instrument. It is mainly used for industrial process measurement and control of the temperature parameters. It adopts thermocouple, heat resistance as 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 relevant technical indicators are as follows:

input range: - 60 ℃ ~ 175 ℃

accuracy level: 0 or less. 5%. F。 S

the machine power consumption: 0 or less. 5 va

insulation resistance: p 20 m Ω ( DC500V)

response time: 350 ms or less

working environment: - 10 ℃ to 50 ℃, 20% ~ 90% without any condensation

storage environment: - 40 ℃ ~ 70 ℃, 20% ~ 95% without any condensation

introduction to temperature temperature sensor calibration

the positive voltage end of regulated power supply to the access of the multimeter red pens and ( + a) At one end, multimeter black pens and ( - A) One end connected to the temperature of the positive power of the temperature sensor, and then from the negative power supply end of the temperature sensor temperature regulated power supply access to the negative power supply side, the multimeter knob to MA block, numerical choose 20 MA, connect the calibration instrument access thermocouple accidentally core of two wires, the positive and negative connection to correctly, and then stabilized voltage supply to the 220 v power supply, electricity, adjust the 24 v power supply, make the output voltage of the dc 24 v; Then make a regulated power supply switch, use the calibration instrument given 0 ℃, observe whether the multimeter display Numbers corresponding to 4 ma; If not, adjust the temperature, temperature sensor's zero knob multimeter display 4 ma; Then use calibrator given in line with the range stipulated in the temperature on the temperature sensor of values, such as 1300 ℃, the multimeter displays is 20 ma; Then according to the situation, adjust the temperature of the temperature sensor with a knob, make the multimeter displays 20 ma; Then also can measure several intermediate values to verify, such a temperature temperature sensor calibration, can be put into use. And of course some temperature temperature sensor with zero adjustment knob, full of not due to the limitations of our technology co. , LTD and calibration tool cannot be calibration, calibration can only be returned to the factory. Important to note here, when we choose the temperature of the temperature sensor range do not match the range size and set of DCS, saw in the central control room temperature is not real, so you must ensure that range. In use process, have encountered such a situation, so before use to ensure the consistency of its range.

temperature temperature sensors use points

1, wiring: intrinsically safe circuit wiring ( The input signal) , must be with an insulation sleeve or shielded wire, and the intrinsically safe circuit wiring insulated from each other, so as to avoid mixing touch each other.

2, different models according to the manual wiring, temperature temperature sensor 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.

3, using temperature, temperature sensor, 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.

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