Pay attention to the six factors can prevent pressure sensor problem

If the pressure sensor is stored or assembly in beyond the manufacturing environment of suppliers limit, the sensor will appear problem. Cheng gen innate summarizes the reality of six is worth us to focus on the following factors: 1, the temperature in the first place, the high temperature is one of the reason for the pressure sensor problems, because many parts of the pressure sensor can only work in the specified temperature range. In the process of assembly, if the sensor is exposed outside the temperature range of conditions, may be adversely affected. For example, if the pressure sensor is installed in the steam pipe near the steam generator, will influence the dynamic performance. Correct and simple solution is to remove the sensor from steam pipe further. 2, voltage spike voltage spike is a short-term transient. Although the high energy surge voltage are only a few milliseconds, but still it might damage the sensor. Unless the source voltage spike is very clear, like lightning, or else it will be difficult to detect it. Original equipment manufacturer's engineer must focus on the entire manufacturing environment and its potential risk of failure. Timely communication with our help to find and eliminate these problems. 3, fluorescent lamp, fluorescent lamp is started, the need to use high pressure argon arc decomposition and mercury, mercury will be heated to gas. Start the peak voltage may cause potential harm to the pressure sensor. In addition, the effects of the magnetic field can also lead to voltage fluorescent lighting on the sensor conductor, mistaken for the actual output signal of control system. As a result, the sensor should not be placed under fluorescent lighting or nearby. 4, emi/rfi pressure sensor is used to convert pressure into electrical signals, and therefore vulnerable to electromagnetic radiation or electrical interference. Although sensor manufacturers have tried to ensure that the negative impact of the sensor is not subject to external disturbance, but certain sensor design should reduce or eliminate the influence of emi/rfi. Should avoid the other electromagnetic interference/radio frequency interference sources including contactor, the power cord, computers, radios, mobile phones and variable magnetic field generated large machines. To reduce emi/rfi shielding is the most commonly used method, filter and inhibition. You can ask us for the correct preventive measures. 5, impact and vibration impact and vibration will lead to all sorts of problems, such as shell sag, wire, circuit board fault, signal error, intermittent failures and shorten the life. In order to avoid the impact and vibration in the process of assembly, the original equipment manufacturer shall, first of all, considering the potential problems in the design, and then take measures to eliminate them. The simplest method is to install sensors, as far as possible away from shock and vibration source. Another possible solution is to use based on the installation method of vibration isolator. 6, overpressure once the original equipment manufacturer to complete machine assembly, should be careful to avoid overpressure problem, both in their own production site and in the end user's location. The causes of overvoltage are various, including the water hammer effect, heating system accident, fault voltage regulator, etc. If the pressure pressure value occasionally meet the ceiling, the tension sensor can withstand and returns to its initial state. Breakdown pressure, when pressure is reached, however, may cause the sensor diaphragm or shell burst, resulting in leakage. Maximum pressure and pressure value between the burst pressure can lead to the diaphragm permanent deformation, lead to the output drift. In order to avoid over-voltage, OEM engineer must understand the system dynamic performance and the constraints of the transducer. In the design, must master pump, control valve, balance valve, check valve, pressure switch, motor, compressor, storage tank, etc. The relationship between the system components.
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