『Flow meter manual』Related information(clamp on meter|electromagnetic meter|venturi meterrotameter|orifice meter|ultrasonic flow meter|mass flow meter|coriolis mass flow meter|coriolis flow meter|magnetic flow meter|magmeter flow meter|magflow flow meter|mag meter flow meter|electromagnetic flow meter|vortex flow meter|turbine flow meter|thermal mass flow meter|thermal flow meter|rotameter flow meter)
1. Types and principles of flow meters
According to the measurement principle, flow meters can be divided into the following categories:
1. Mechanical principles: Instruments belonging to this category include differential pressure type and rotor type using Bernoullis theorem; The impulse equation and movable tube equation using the momentum theorem; Using the direct mass formula of Newtons second law; Target based on the principle of fluid momentum; Turbine type using the angular momentum theorem; Vortex type, vortex street type, etc. utilizing the principle of fluid oscillation.
2、 Electrical principles: Instruments used for this type of principle include electromagnetic, differential capacitive, inductive, strain resistance, etc.
3、 Acoustic principles: There are ultrasonic and acoustic (shock wave) methods that use acoustic principles for flow measurement.
4、 Thermal principles: There are various methods for measuring flow rate using thermal principles, such as calorimetry, direct calorimetry, and indirect calorimetry.
5、 Optical principles: Instruments such as laser and photoelectric instruments belong to this type of principle.
6、 Atomic physics principles: Nuclear magnetic resonance, nuclear radiation, etc. are instruments belonging to this type of principle.
7. Other principles include labeling principles (tracer principle, nuclear magnetic resonance principle), related principles, etc. Extended Data Flow Meter Market Factor: Driving Factors According to the International Energy Agency (IEA) forecast, a cumulative global investment of $26.0 trillion (in 2007 US dollars) is needed in energy infrastructure from 2007 to 2030. In the long run, foreseeable ener
2. Consult a skilled translator to translate maintenance instructions - Chinese to English
First, Chiji methods (Note matters): The method of ① Cross with a screw driver on the Dike will be removed four screws; ② Dike will open with iron battery is, a negative electrode wire bonding, and then Deke will be removed, Deke camera decorative circle posted a protective film to prevent dust into the camera lens, and then tape battery cathode paste living to prevent and repair damage to short-circuit when the battery cell; ③ PCB board will be the speaker wire bonding, with a screwdriver will cross the PCB board removed four screws, and then remove PCB motherboard, LCD display and a crust removed from the board; (Note: when the demolition of PCB board pay attention to the LCD cable not force, to prevent LCD monitor cable breakage) Second, the maintenance of 1 Dead: ① at both ends of the battery positive and negative electrodes leads positive and negative two fuses, will be raised to 3.7 V power supply around long boot by POWER button boot and at the same time observe whether ammeter starting cur
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