Guide rail installation industry information integration temperature sensor temperature prices 'this information effectively for a long time'

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 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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no signal output temperature temperature sensor failure,

no signal output failure reason of temperature temperature sensor has several judgment method:

1 temperature sensor output, check to see if the temperature sensor power supply by reverse;

take power supply polarity correctly.

2 measuring temperature sensor of power supply, if there is a 24 v dc voltage;

must make the pledge that we shall supply the power of the temperature sensor voltage 12 v (or The temperature sensor power input voltage of 12 v or higher) 。 If there is no power supply, should check whether the circuit disconnection, whether testing instrument selection error ( Input impedance should be 250 or less Ω) ； And so on.

3 if is integrated with a header, check whether the header is damaged, Header in the first two wire short circuit, if the normal after short circuit, the header is damaged) ；

the damage to the meter to the other in headers,

4 string into the 24 v power supply circuit, current meter to check whether the current is normal;

if the normal temperature sensor is normal, should check other instrument in the circuit is normal at this time.

temperature sensor temperature adjustment problems

general temperature temperature sensors under the condition of normal use is not need to be adjusted, but we are considering various factors in the process of using, also is to adjust the temperature sensor to temperature, it is necessary. If you find your instrument can not work normally, instrument for more than 20 ma output current. Open circuit of sensor, due to the temperature sensor protection tube ( Isolation, to prevent the failure of the instrument) Temperature temperature sensors in most cases, the insulation resistance of degradation. If does not affect the instrument input short circuit work. Button to select the circuit, when the output current is less than 4 ma, instrument display is below zero.

the temperature and humidity temperature sensor instrument panel, and then click on 'the power of images. Initial resistance adjusting box, 100 Ω input circuit termination conditions, the rest of the input circuit loop.

W12157 resistance setting adjustments. 31 Ω, make 20 ma output ( 2) , adjust the potential 4 ma output W11, steps, until the good precision range, has been repeated.

standard square resistance, to 20 ma ma and 4 output, so as the second cycle, adjustment of step two, to adapt to the * * m W22 road second, and low potentiometer W21, short circuit to the rest of the input circuit.

standard resistance box, repeat steps 2 and won the third and fourth cycle. Respectively, all four W41 adjustment cycle is complete, W42, W31, W32 adjust potentiometer.