Problem 1: What do you want to measure?

 

This is clearly it seems that, but think carefully please. What should you measure truly? In other words, what do you want to do? What do you hope to get? How do you plan to process data? Acceleration sensor can monitor vibration, provide primitive and oscillatory data, and vibration changes send implement offer root mean square (RMS) value. Analysing primitive and oscillatory data is useful, because it contained the information of all oscillatory signal, true peak value amplitude and oscillatory frequency. Because RMS total value or peak value are signal of successive 4-20 MA, be like,be in PLC, DCS, in SCADA system and PI control system very useful. Process of a few application uses two kinds of signal at the same time. All sorts of signal that need through applying program place certainly, can narrow greatly search limits. Additional, is you measure vibration to use acceleration or speed or displacement? Do you consider sensor of a few industry to you can output vibration and temperature at the same time? Finally, a few field application, be like vertical pump, the axis that had better monitor an above is oscillatory. Whether does your field application need odd axis, double axis or are 3 axes measured?

 

Problem 2: Does amplitude have how old?

 

The biggest amplitude of the vibration that be measured or limits, the decision uses the sensor of which kinds of limits. 100 MV/ G of typical acceleration sensor sensitivity, standard application (50g limits) the application of the low frequency with 500 MV/ G or low amplitude (10g limits) . The 4-20 MA that general industry applies changes send implement the range that uses 0-1 In/ S or 0-2in/s normally.

 

Problem 3: How much is oscillatory frequency?

 

To different incentive frequency, the reaction of physical structure and dynamical system is different. Oscillatory sensor is without what different. Control the property of electric data, connect filter with respect to image height, accordingly, even if sensor of best the type that suppress report, also have the restriction of the low frequency that makes an appointment with 0.2Hz. Sensor regards an odd freedom as spent dynamic system, have natural resonance frequency. Signal is magnified greatly when natural resonance frequency, cause the change that sensitivity is showing, exceed span probably. Most industry accelerometer has sheet or double RC filter offsets excitation resonance frequency. Choose limits of sensor practicable frequency, its limits includes the frequency that you are interested in, this is very crucial.

 

Problem 4: How much is environmental temperature?

 

Change to ICP acceleration sensor and 4-20mA send implement, extremely high environment temperature constitutes menace to in-house electron. Charge the acceleration of mode sensor can fall in very high environment temperature use, its are done not have inside buy electron, use long-range charge amplifier however. Charge mode quickens sensor to deserve to have cable of hard line of an organic whole, the OK in temperature applying that exceed 260° ℃ environment to fall, for example gas turbine vibration is monitored etc.

 

Problem 5: Whether to meet is immersion in the liquid?

 

The industrial acceleration sensor that deserves to have cable of polyurethane of an organic whole is OK immerge liquid is permanent installation. To high-pressured application, the pressure that best sensor has one hour checks. The application that floods completely needs cable of an organic whole. In spray cable of an organic whole on the circumstance that and rather than floods completely also is demand, be like fluid of machine tool cutting.

 

Problem 6: Whether can you expose in potential and harmful chemical material or fragment?

 

Industrial acceleration sensor can be used anti-corrosive and be able to bear or endure the stainless steel that chemistry corrodes undertakes construction. In the environment of harmful and chemical material, sensor considers to use get together 4 fluorine ethylene is anticorrosive join cable. Intense proposal checks the chemical compatibility chart of any doubtful and chemical material. To can the environment that bring into contact with cuts bits, armoured cable of an organic whole can provide good protection.

 

Problem 7: ? Does Kang owe ∏ of  of an ancient drinking vessel of  of  of an ancient drinking vessel of コ of Jian Ping  foolish herd lip cherry?

 

Final, sensor needs to hurt installation in the usable space of equipment. The figure of sensor is not great to its function influence, but need to consider to spot safety is installed and maintain an operation. Deserve to have the cabinet acceleration sensor that locknut designs, can secure in any direction, but when deserving to have cable of an organic whole, very convenient.

 

 

Problem 8: ? Is Kang scabbard A Chinese-style unlined garment enzymatic whoop does all of chasm of reason of  magpie act kill sole of dispute of lens Mu  ?

 

Low cost and sensor of high accuracy acceleration have two main distinction. Above all, precision unit normally complete demarcate, this is to point to undertake inside usable frequency limits sensitivity is answered measure plot. Sensor of low cost acceleration is only place demarcate, undertake in a frequency sensitivity is measured only. The 2nd, sensor of high accuracy acceleration has strict public errand to be like sensitivity and frequency limits in certain standards.

 

 

For example, the acceleration sensor of a high accuracy is nominal sensitivity is ％ of 100 MV/ G±5 (95 MV/g comes 105mV/g) , and sensor of acceleration of a low cost is nominal sensitivity 100mV/g±10 ％ (90 MV/g comes 110mV/g) . The client can collect a system to install the demarcate sensitivity that is sensor in data, the sensor of so low cost also can be offerred accurate, but reduplicative data. As to frequency, sensor of high accuracy acceleration normally the biggest error is 5 ％ , and the sensor of low cost, can offer the frequency range of 3 DB. Nevertheless, the sensor of a low cost can offer exceedingly good frequency to answer.

 

Problem 9: Is the attestation with your special demand piled up?

 

The acceleration sensor that gets CSA and ATEX attestation and 4-20 MA change send implement can be in dangerous area is used. Compare the attestation of sensor, in order to ensure it accords with your demand.

 

The answer of nine problem, can narrow greatly your search, in order to seek optimal solution of application. Remember well, the result that combines together may be mutual repulsion, that is to say, the solution satisfies every standard nonexistent. For example, the ATEX attestation that the specific pattern that uses in dangerous area may do not have. In addition, special field application may have the consideration of other side.