Installation of electromagnetic flowmeters
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This post was last edited by vn4893 on 2016-11-16 at 17:11. Due to the various advantages of electromagnetic flowmeters, more companies are now using them. So, how should electromagnetic flowmeters be installed? What installation requirements are necessary to ensure better performance, greater accuracy, and improved safety? The installation of electromagnetic flowmeters is very important; in fact, how to ensure proper grounding of the electromagnetic flowmeter during installation is also a crucial issue. In this regard, when installing electromagnetic flowmeters, we should pay attention to the following points: 1) The grounding terminals of the sensor and converter must be at the same potential as the medium being measured. 2) Using the ground as a zero potential point to reduce external interference. Since ordinary process pipelines are metal pipes that are grounded by default, this requirement is relatively easy to meet. However, if there is significant external electromagnetic interference, then the grounding setup needs to be adjusted again; multi-strand copper wires with a cross-sectional area of more than 5 mm2 should be used for the grounding wires, and they must not be connected to the motor or the common ground wire in order to avoid interference from leakage currents. 3) The sensor is installed on metal pipes (which do not have an insulating coating on their inner walls). 4) When installed on plastic pipes or pipes with an insulating lining, ground rings, ground flanges, or short tubes equipped with ground electrodes must be installed at both ends of the sensor. 5) The fluid flowing in the pipeline is in short circuit with the ground, resulting in a zero potential; otherwise, the electromagnetic flowmeter cannot function properly. The above is an introduction to the installation of electromagnetic flowmeters. If you have any other better suggestions or questions, feel free to leave comments for discussion.
Learning about the on-site installation and calibration of *electromagnetic flowmeters
Our factory uses electromagnetic flowmeters from Cologne. After installation, the fuses in the cabinet keep blowing; the flowmeter itself has a 1A fuse. Based on the power and voltage of the flowmeter, the maximum current generated should be 0.5A. Yet, using a 1A fuse still results in the fuse blowing, while a 2A fuse prevents this issue. I suspect that the flowmeter itself is generating some current; I’m not sure. Have you encountered the same problem?
You can try Burkert’s electromagnetic flowmeter
No problem with normal use; just need to replace it with a 2A fuse
Our company uses electromagnetic flowmeters to measure 27.5% hydrogen peroxide solutions, and the measurement values show significant variations. For checking electromagnetic flowmeters, a conductivity level of more than 5 is required; according to the tables, the conductivity of a 27.5% hydrogen peroxide solution is around 4.3. I was wondering: is the conductivity requirement for electromagnetic flowmeters really that strict? Or some other reason?
The general standard requirement is that the conductivity be greater than 5. . For specific details, you can consult the manufacturer of the flow meter being used.
Mm-hm, we’ve decided to replace the orifice plate