Modify range
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Can an E+H vortex flow meter, originally with a range of 250 m3/h, be modified to have a range of 10 m3/h and used as a measuring device for trade settlement?
The last edit to this post was made by tiger2010 on 2018-2-7 at 14:03. It seems that vortex flow meters have not been used as measurement devices for trading purposes; compensation would likely be necessary anyway (given that the measurement range has been reduced so much)
With the range reduced by so much, does this meter still have accuracy?
Does the poster mean that reducing the range can improve accuracy or something like that? It’s already good that you’ve reduced the range so much (that it still allows for accurate measurements).
Check the manual for this flow meter to find out what the range ratio is, that is, the minimum measurement range; if the value falls below this minimum, the accuracy can no longer be guaranteed.
As long as it matches the actual measurement values, it is acceptable to adjust the range; however, vortex flowmeters should be used with caution for trade settlement purposes – at the very least, a mass flowmeter should be used
Ask the manufacturer to recalculate it; the change is too large to determine whether it falls within the normal measurement range. If there is any calculation software available, one can carry out the calculations themselves. Vortex flowmeters are used for measurement, and agreement between the supplier and the user is required, along with mandatory calibration to ensure compliance.
With your traffic reduced to such a low level, it’s time to shrink the scope
The range ratio of vortex flowmeters is either 3:1 or 10:1; by reducing it by 25 times, it seems a bit unreliable. For vortex flowmeters with such a large range, the measurement error is likely to be greater than 5%, and in the context of commercial transactions, the parties involved probably won’t agree to this. This has little to do with whether temperature and pressure compensation is used or not; temperature and pressure compensation isn’t a panacea either. It’s mainly due to the nature of vortex flowmeters, which result in inaccurate measurements at low flow rates.