The electromagnetic flowmeter does not display the flow rate
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I recently purchased an electromagnetic flow meter for production use, with a range of 0–20 cubic meters per hour. I now need to measure a flow rate of 70 liters per hour, but the instrument does not display this value. Question 1: Is it because the traffic volume is too low to detect it? It’s still related to the dripping rate issue. 2. Can flow meters of the electromagnetic flow meter type really not measure such low values? Is it necessary to switch to a mass flow meter?
How is the conductivity of the medium? Could you please provide the electromagnetic caliber? In electromagnetic flowmeters, there is a parameter called lower limit cut-off, which can be adjusted to a lower value or turned off
Could you please provide the electromagnetic caliber? The electromagnetic flowmeter is estimated to have a minimum flow rate of 0–20 l/min for DN32, and measurement is required with the pipe completely filled. It is recommended to use another flow meter. For example: twin-screw flow meters, gear flow meters, rotor flow meters, etc.; mass flow meters are used when high precision is required
First, look at this range: 0–20 cubic meters per hour. The required value now is 70 liters per hour, which equals 0.07 cubic meters per hour. It’s 0.3% of the full range, so it has already been cut off; the corresponding current is 4.048 mA. Do you think the DCS will be able to read this value...? Suggested solutions: 1. The range ratio of ordinary electromagnetic flowmeters is 1:100; setting the range to 0–0.2 cubic meters per hour may allow for accurate measurements (ensuring the pipe is full). 2. Choose an electromagnetic flowmeter with a small diameter and install reducers before and after the pipe. Small diameter ≈ small range. 3. This is a matter of selection; it has nothing to do with the type of flow meter at all. Choosing a mass flow meter with a range of 0–20 cubic meters per hour will not allow you to obtain any measurement data… 4. Apart from the methods mentioned above, there are no other cost-free solutions……
First, ignoring conductivity, your flow rate is too low, so this electromagnet is not suitable. Secondly, you can choose a mass flow meter for this; don’t select one based on 20 m3/h – instead, choose one corresponding to your current flow rate of 70 L/H.
70L/H？ It doesn’t matter if they’re not satisfied; stop testing it – just give up now.