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AC excitation usually refers to the use of a 50Hz (or 60HZ) sine wave power frequency city excitation sensor. The most important advantage of this excitation method is that it can reduce the polarization of the electrolyte liquid on the electrode. Therefore, the influence of drifting DC interference on the measurement is greatly reduced. Secondly, […]

We know that metal conductors and conductive fluids in an alternating magnetic field will also generate an induced electric potential like the iron core of an energized iron core coil, and an induced current will appear. These induced currents flow in a vortex around the center of the conductor in the metal conductor and fluid,

Due to the cohesion between molecules, the free surface of the liquid shows a tendency to shrink. Since cohesion can only be manifested in the range of action with a small radius (approximately 10-7cm), molecules with a large distance from the interface will be offset by the gravitational forces of the surrounding molecules and will

The electromagnetic flowmeter consists of a sensor and a converter. Due to the characteristics of the principle and structure, the sensor has the following main advantages: (1) The structure is simple, there are no moving parts and disturbing parts or throttling parts that hinder the flow of the measured medium, and there will be no

Ultrasonic flow meters are divided into mono and multi-channel. If it is mono, the price is relatively cheap, but the accuracy is not high. This is the disadvantage of the ultrasonic flow meter: (1) The temperature measurement range of the ultrasonic flowmeter is not high, and generally, it can only measure the fluid whose temperature

Storage The turbine flowmeter should be stored in a dry environment and should be stored in its original packaging box as much as possible Do not remove the protective covers at both ends of the flange before installation, they can prevent the inside of the instrument from being invaded by dust or debris Ensure that

In order to ensure the best performance during use, users should pay attention to the inspection requirements before installation: (1) Before installing the turbine flowmeter, the pipeline must be cleaned. When the measured medium is not clean, a filter must be added. Otherwise, the turbine and bearing are easily stuck or damaged, which will directly

As with the usual meters, after the electromagnetic flowmeter is installed and wired, it should be checked whether the installation and wiring are correct and whether the meter can work normally. It must be emphasized here that for some units lacking experience, the instrument installation and operation personnel should carefully read the relevant technical instructions

General technical requirements 1. Files The flowmeter should be accompanied by instructions for use. The flow meter that is calibrated periodically should also have the previous verification or calibration certificate. 2. Nameplate and logo (1) The flow meter should have a clear flow direction mark. (2) The flowmeter should have a nameplate. The meter body

Explosive hazardous environment Generally, the instrument is used in an explosive environment, and an instrument that is suitable for the atmosphere of the place of use, the classification, and grouping of the explosive mixture, the type of equipment, and other safety rules or standards should be selected. External magnetic field Industrial automation instruments generally have