The issue of choosing an electromagnetic flowmeter for measuring highly corrosive liquids such as strong acids, bases, and salts
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The medium being measured is highly corrosive at present; the electrode material is titanium, the inner lining of the electromagnetic flowmeter is PTFE (polytetrafluoroethylene), and the pipes are also made of PTFE. Under such conditions, the values fluctuate significantly when there is no grounding – so how should it be grounded?
I haven’t used it in practice, but can’t a ground wire be pulled from the power supply side?
The medium of the electromagnetic flowmeter must be grounded. For metal (unlined) pipes, the fluid is \"grounded\" as the pipe is grounded, and no grounding ring is required. For lined pipes, the fluid remains suspended, so a \"grounding ring\" is required to draw the medium out separately and ground it on-site. The grounding ring may also be made of a precious metal.
Don’t you know that electromagnetic flowmeters have grounding electrodes or grounding rings? This option should have been selected at the time of ordering. It’s likely that an electromagnetic flowmeter was purchased through a bid process at the lowest price; this configuration helps to save money, especially when it comes to the grounding electrodes made of precious metals.
The lining or plastic pipe must be grounded through a grounding ring, and the material of the grounding ring electrode must be the same as that of the electrode.
You’re absolutely right; it’s the lowest configuration
Yes, it was omitted during installation; now it needs to be replaced. If a flow meter with a grounding electrode is chosen, can the grounding ring be omitted?
I asked the manufacturer, and they said that if it’s possible to save money, then do so; if not, then there’s nothing that can be done
There is a ground electrode; it’s advisable to also include a ground ring.