Glass rotameter scale when using scale how to fix and flow meter scale calculate

Abstract: the scale of glass rotameter scale when using how to fix and meter scale calculate information produced by excellent flow meter, flow meter manufacturer to offer you the quotation. Glass rotor flowmeter is a kind of simple to use, easy reading, instantaneous flow measurement instrument is very versatile, choose good, good use of this instrument is very important. Flow measurement in the environmental protection analysis instruments, lab, mechanical and chemical field. More flow meter manufacturers choose model price quote you are welcome to inquire, here is a glass rotameter scale when using the scale of the article details how to fix and meter scale. Glass rotor flowmeter is a kind of simple to use, easy reading, instantaneous flow measurement instrument is very versatile, choose good, good use of this instrument is very important. Flow measurement in environmental analysis instruments, laboratory, chemical engineering, mechanical field in these categories, such as glass rotameter dosage up to more than three hundred thousand sets per year, from LiangBang has close to fifty thousand units. On how to see the float meter readings, the following is a manufacturer to introduce a simple and easy method for your reference: eye level, on the top of the rotor plane reading scale, starting from the direction of zero calibration. Read the data on the rotor flow meter for transient flow, or traffic volume, or for the mass flow rate. Such as mass flow rate, you first conversion for volume flow ( Unit m3 / s) And then according to the calibre of the rotameter with volume flow divided by the cross-sectional area can estimate ( Note: here is the estimate, because the cross-sectional area is not linear) The selection of glass rotameter can consider from the following several aspects. Measurement object. The measured medium type, pressure, chemical properties. Such as the liquid medium, gas medium, should choose the corrosion of corrosive medium flow meter. 2. Flowmeter performance in itself. After the confirmation of the above conditions generally speaking, if the price is no big change, give priority to choose needle valve is placed in the upper part of the meter; Has a larger circulation hole, is a direct flow calibration; The structure is simple; Small size of external and so on. So small flow range, can choose the ball float type, because it is stable, not easy to dust measurement, high precision, good interchangeability. 3. According to the price. Generally speaking, the price of the high precision high. Should choose instrument precision grade according to measurement purposes, such as by volume, only control medium by commissioning, later need to steady the throughput, so accuracy is secondary. Second, glass rotor meteor meter calibration correction glass rotor flowmeter calibration, is a manufacturer with nearly ideal fluid water under the condition of the factory and the calibration of dry air as medium. But in the use of the meter the scene, there are two kinds of situations can not directly use its scale value: one is the measured medium is not air and water, the second is measured and the medium is water and air, but its state ( Pressure) And calibration status. So, in the use of flow time, in order to obtain the correct measurements, it need to modify the scale value problems. Therefore, to solve the glass rotor flowmeter calibration correction, is the key to good use this instrument. Considering the environmental protection equipment using the rotor flowmeter measurement with a large number of gas medium flow, so below is only gas medium density correction of the measurement are discussed. Due to gas medium viscosity is small, and so are discussed when omit viscosity influence. Practice has proved that this does not affect the accuracy of the revised. Below is the rotor flowmeter flow generally express try ( 1) It is not considered the calculation formula of medium viscosity influence. From ( 1) Float type can obviously concluded: when a flowmeter position, after the confirmation of highly density measured medium & rho; Is * variables, if the density of the measured medium, the medium by the flow meter is different also. Therefore, calibration correction is actually flow. If two different density & rho; 1、ρ 2 medium respectively through from the rotor flow timing, if the float balance on the same solid, by ( 1) Basic type: type of rotameter density conversion type, P1, Tl and P2, T2 are two states of the same medium with two parameters of pressure and temperature. Visible, for the same gas medium, its density conversion can be converted into a completely different conditions of temperature and pressure conversion. So, for measuring the same scale of gas medium flow rate correction, zui eventually turned into a state of temperature and pressure correction ( Essentially a density correction) , it is obvious that this is the general, the revision method of unit using easy to implement.

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