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Instructions for the correct installation of the gasoline flowmeter

How to properly install the gasoline flow meter? Everyone knows that gasoline is a very volatile liquid. Therefore, it is very important to maintain proper installation during installation to avoid unnecessary losses. Let's listen to some insights from the instrumentation world network on gasoline flowmeters.

1 Transmitter should be installed in indoor dry and ventilated place. Avoid installation in places with high ambient temperature, should not be subjected to strong vibration, try to avoid equipment with strong magnetic field, such as large motor, transformer, etc. Avoid installation in corrosive Gas occasions. Installation location is easy to overhaul. This is the environmental condition to ensure the normal operation of the transmitter.

2 In order to ensure that the measuring tube of the transmitter is filled with the measured medium, the stacker is preferably installed vertically, and the flow direction is from bottom to top. Especially for liquid-solid two-phase flow, it must be installed vertically. If the site only allows horizontal installation, it must be guaranteed. The two electrodes are on the same horizontal plane

3 The transmitter should be equipped with valves and bypass at both ends.

4 The millivolt AC potential measured by the electrode of the electromagnetic flow transmitter is based on the liquid potential in the transmitter. In order to stabilize the liquid potential and the potential transmitter and the fluid maintain the equipotential to ensure stable For measurement, the transmitter housing and the metal tube should have good grounding at both ends, and the converter housing should also be grounded. The grounding resistance should not be greater than 10, and cannot be shared with the grounding wire of other electrical equipment. If the transmitter housing is not guaranteed to be in good contact with the metal pipe, connect them with metal wires and ground them reliably.

5 In order to avoid interference signals, the signal between the transmitter and the converter must be transmitted with shielded wires. It is not allowed to place the signal cable and the power cable in parallel in the same cable. The length of the signal cable should not exceed 30m.

6 converter installation site should avoid AC and DC strong magnetic field and vibration, ambient temperature is -20 to 50 ° C, does not contain corrosive gases, relative humidity is not more than 80%.

7 In order to avoid the influence of the flow rate on the relative measurement, the flow regulating valve should be placed downstream of the transmitter. For small-caliber transmitters, the distance from the center of the electrode to the inlet end of the flowmeter is equivalent to several times the length of the diameter D. Therefore, the upstream straight pipe may not be specified. However, for a flowmeter with a large diameter, generally there should be a straight pipe section of 5D or more in the upstream, and the straight pipe section is generally not required in the downstream.

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