What is the small-signal cutoff ratio for orifice plate flow meters?
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Is there any formula for this? Does the cutting ratio vary depending on the medium used? I’d like to ask everyone**!
There’s no formula for this; it depends on the actual operating conditions. Usually I set it between 2% and 5%. In fact, if the minimum actual flow rate isn’t that low, it doesn’t really matter
There is no specific formula; it’s generally around 5%.
There is no clear stipulation. Low flow rate is inaccurate.
There is no clear stipulation. Low flow rate is inaccurate.
It generally does not exceed 5%; it depends on the specific circumstances. In fact, if the flow rate is low, calibration can be carried out first; only if it’s not possible to adjust the zero point should it be removed
Generally, 5% is chosen, or it can be adjusted according to the process requirements
This can only be confirmed when you park. Usually at this point, the technician would say in an angry tone: Damn it, I’ve already stopped the machine, and yet this damn gauge still shows some flow rate – fix it right away. Then, you perform a low-flow resection, so that the central control display shows zero, and the world becomes peaceful and quiet.
For orifice plates, we usually cut them by 5% to 10%
There isn’t a very clear specification; it’s determined through negotiation with the manufacturer, and it’s usually within 5%.
Do different measurement media and different pressure differences result in different cutting ratios?