• <td id="qyqce"></td>
  • <td id="qyqce"></td>
  • <td id="qyqce"></td>
  • <td id="qyqce"><button id="qyqce"></button></td><td id="qyqce"><li id="qyqce"></li></td>
  • <xmp id="qyqce">
  • <td id="qyqce"></td>
  • <table id="qyqce"><li id="qyqce"></li></table>
  • <td id="qyqce"><button id="qyqce"></button></td>
  • <xmp id="qyqce">
  • Brief analysis of anti-interference method of pressure transmitter
    release time:2021-02-02 09:12:00hit count:

           The pressure transmitter can convert the received gas, liquid and other pressure signals into standard current and voltage signals of 4-20mADC to provide secondary instruments such as indicating alarms, recorders, regulators, etc. for measurement, indication and process adjustment. The pressure transmitter converts the mechanical signal of water pressure into an electronic signal such as voltage or current (usually 0-5V or 4-20mA). The pressure and the voltage or current have a linear relationship, which is generally proportional, so The voltage or current output by the transmitter increases as the pressure increases, and a relationship between pressure and voltage or current is derived from this.

           1. Control in the production process of pressure transmitter

           Pressure transmitters need to maintain stability after overtime work. Most transmitters will "drift" after overtime work. Therefore, it is necessary to understand the stability of the transmitter before buying. This pre-work can reduce All sorts of troubles in future use. When the pressure transmitter is packaged, it is especially easy to overlook its frame, but this will gradually expose its shortcomings in future use. When purchasing a transmitter, you must consider the future working environment of the transmitter, how the humidity is, how to install the transmitter, whether there will be strong impact or vibration, etc.

           What kind of output signal the pressure transmitter needs: mV, V, mA and frequency output digital output, depending on many factors, including the distance between the transmitter and the system controller or display, whether there is "noise" or other electronic Interfering signal. Do you need an amplifier, the location of the amplifier, etc. For many OEM devices with a short distance between the transmitter and the controller, the use of mA output transmitters is an economical and effective solution. If the output signal needs to be amplified, use a transmitter with built-in amplification. For long-distance transmission or strong electronic interference signals, mA-level output or frequency output is adopted. If you are in an environment with high RFI or EMI indicators, in addition to choosing mA or frequency output, you must also consider special protection or filters.

           2, the solution to the on-site problem of the pressure transmitter

           For on-site installation, the pressure transmitter should be as far away as possible from interference sources such as large motors, high-voltage lines or transformers. In the selection of transmission cables, shielded signal cables with a shielding density greater than 85% should be used. Keep away from the above interference sources as much as possible, and the cables should be laid separately, not in a pipeline or bridge together with the power line.


    国产精品黄色视频
  • <td id="qyqce"></td>
  • <td id="qyqce"></td>
  • <td id="qyqce"></td>
  • <td id="qyqce"><button id="qyqce"></button></td><td id="qyqce"><li id="qyqce"></li></td>
  • <xmp id="qyqce">
  • <td id="qyqce"></td>
  • <table id="qyqce"><li id="qyqce"></li></table>
  • <td id="qyqce"><button id="qyqce"></button></td>
  • <xmp id="qyqce">