Discussion on the anti-interference of pressure transmitter

Time:2018-05-05

This kind of advance work can reduce the troubles that will arise in future use. The 1 pressure transmitter needs to maintain stability after overtime work: most transmitters will be “drifting” after overworking, so it is necessary to understand the stability of the transmitter before buying.

In particular, it is easy to overlook the packaging of rack and 2 pressure transmitter. The encapsulation of the transmitter. However, this will gradually expose its shortcomings in later use. When choosing a transmitter, we must take into account the future working environment of transmitters, humidity, and how to install transmitters, and whether there will be strong impact or vibration. (Nanjing Hong Mu science and Technology Co., Ltd.)

Do you need to use a connector? What kind of connection between the 3 pressure transmitter and other electronic devices? Do you need short distance connections? If you use long distance connections.

Depending on many factors, including the distance between the transmitter and the system controller or monitor, there is no noise or other electronic jamming signals. The amplifier, the amplifier position, and so on. For many OEM devices with short distance between transmitters and controllers, the most economical and effective solution to the mA output transmitter is to use an amplifier with a built-in amplifier if the output signal is needed. For long-distance transmission or existence of strong electronic jamming signal, it is best to use mA level output or frequency output. If you want to choose mA or frequency output in the high environment of RFI or EMI, you should also consider special protection or filters. At present, due to the needs of various acquisition, 4 choose what kind of output signal. What kind of output signal does the pressure transmitter need to get: mVVmA and frequency output digital output. There are many kinds of output signals of pressure transmitter in the market now, mainly 4-20mA, 0-20mA, 0-10V, 0-5V and so on, but two kinds of 4-20mA and 0-10V are commonly used. In these output signals, only 4-20mA is two line system, the output is a few line system that does not contain grounding or shielding line, the other is three wire system)

Therefore, the power supply voltage range is larger. Some of the devices are quantitatively configured, and 5 choose what kind of excitation voltage. The type of output signal determines which excitation voltage to choose. Many amplifier transmitters have built-in voltage regulator. A stable working voltage is needed, so a working voltage can be obtained to determine whether a sensor with a regulator is used, and when the transmitter is selected, the working voltage and the cost of the system should be considered.

This is very important. Especially for OEM products. Once the product is delivered to the customer, 6 of them need to have interchangeability transmitters. Make sure that the transmitter is able to adapt to multiple use systems. Generally speaking. Then the cost of calibration by the customer is quite large if the product has a good interchangeability, and even the change of the transmitter will not affect the whole system.

7 other determine the above parameters and then confirm your pressure transmitter’s process connection interface and the power supply voltage of the pressure transmitter; if used in a special occasion, it is also necessary to consider the explosion protection and protection level.

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