Home » Flow Meter » Electromagnetic Flow Meter » The importance of grounding ring of electromagnetic flow meter and its requirements

The importance of grounding ring of electromagnetic flow meter and its requirements

1. The role of the electromagnetic flowmeter grounding ring: the grounding ring is directly in contact with the medium through the grounding electrode, and then grounded with the flange of the electromagnetic flowmeter through the grounding ring to achieve equal potential with the ground to eliminate interference.

Rated 4.6/5 based on 205 customer reviews
Share:
Content

1. The role of the electromagnetic flowmeter grounding ring: the grounding ring is directly in contact with the medium through the grounding electrode, and then grounded with the flange of the electromagnetic flowmeter through the grounding ring to achieve equal potential with the ground to eliminate interference.

2. Electromagnetic flowmeter grounding ring use: in some cases it is not suitable to increase the grounding ring, such as when measuring strong corrosive media, often the pipe will use PVC or PTFE lined electrodes to choose precious metals, especially for large caliber, it is impossible to match the grounding ring, the cost is too high. In this case, three electrodes are generally selected, two of which are used for measurement and one is used for grounding.

Generally, if the pipe is made of metal, it can also be without a ground ring, and the flange of the flow meter can be connected with the pipe and then grounded, which can also be used well, especially in the case of large caliber. If the small caliber, with a grounding ring does not matter, the cost will not be too bad. In addition, some users are not testing strong corrosive media, but the pipeline is non-metallic, at this time it must be equipped with a grounding ring, grounding is very important for electromagnetic flowmeters. Field magnetic field interference is fatal to electromagnetic, because the electric field we can take some means to shield, but the magnetic field we can not shield, so the installation of electromagnetic flowmeter must avoid the strong magnetic field.

Because the electromagnetic flowmeter signal is weak, only 2.5~8mv at full scale, and only a few microvolts when the flow is very small, the external interference will affect the measurement accuracy, therefore, the transmitter housing, shielding line, measuring conduit and transmitter pipeline should be grounded, and the ground point should be set separately, and must not be connected to the electric motor, electrical appliances and other public ground lines or upper and lower water pipes. The converter part has been grounded through the cable, so do not ground again to avoid interference due to different ground potential.

Inquiry


    More Electromagnetic Flow Meter

    Electromagnetic flowmeter is a speed meter to measure the volume flow of conductive media. While carrying out on-site monitoring and display, it can output standard current signals for recording, adjustment and control, realizing automatic control of detection, and realizing long-distance transmission of signals. It can be widely used in water, chemical, coal, environmental protection, textile, metallurgy, paper and other industries in the flow measurement of conductive liquid. The structure of the instrument has one type and one type.

    Performance Technical parameter
    Size DN3-DN3000mm
    Nominal Pressure 0.6-1.6Mpa(2.5Mpa/4.0Mpa/6.4Mpa…Max 42Mpa)
    Accuracy +/-0.5%(Standard)     +/-0.3% or +/-0.2%(Optional)
    Liner PTFE, Neoprene, Hard Rubber, EPDM, FEP, Polyurethane, PFA
    Electrode SUS316L, Hastelloy B, Hastelloy C       Titanium, Tantalum, Platinium-iridium
    Structure Type Integral type, remote type, submersible type, ex-proof type
    Medium Temperature -20~+60 degC(Integral type)
    Remote type ( Neoprene ,Hard Rubber ,Polyurethane ,EPDM) -10~+80degC
    Remote type(PTFE/PFA/FEP) -10~+160degC
    Ambient Temperature -20~+60deg C
    Ambient Humidity 5-100%RH(relative humidity)
    Measuring Range Max 15m/s
    Conductivity >5us/cm
    Protection Class IP65(Standard); IP68(Optional for remote type)
    Process Connection Flange (Standard), Wafer, Thread, Tri-clamp etc (Optional)
    Output Signal 4-20mA/Pulse
    Communication RS485(Standard), HART(Optional),GPRS/GSM (Optional)
    Power Supply AC220V (can be used for AC85-250V)
    DC24V (can be used for DC20-36V)
    DC12V (optional), Battery Powered 3.6V (optional)
    Power Consumption <20W Alarm Upper Limit Alarm / Lower Limit Alarm Self-diagnosis Empty Pipe Alarm, Exciting Alarm Explosion Proof ATEX