Nsf 50 Accuracy Certification - H2flow ACUFLOW digital Operating Manual

18. NSF 50 accuracy certification

The accuracy of AcuFlow Digital has been independently certified by NSF to the NSF 50 Standard for Flow Meters. At the
time of printing, AcuFlow Digital is the only digital flow meter in the world to have been certified to this rigorous standard.
The NSF 50 flow meter standard has five levels of accuracy that a flow meter can be certified to - Levels 1 to 5 (L1-L5), and
where L1 is the most accurate:
Level 1 (L1) - Average of absolute values of all single point deviations must be ≤2%. Single point deviations
shall not exceed ±4%.
Level 2 (L2) - Average of absolute values of all single point deviations must be ≤5%. Single point deviations
shall not exceed ±7.5%.
Level 3 (L3) - Average of absolute values of all single point deviations must be ≤10%. Single point deviations
shall not exceed ±12.5%.
Level 4 (L4) - Average of absolute values of all single point deviations must be ≤12.5%. Single point deviations
shall not exceed ±15%.
Level 5 (L5) - Average of absolute values of all single point deviations must be ≤15%. Single point deviations
shall not exceed ±20%.
AcuFlow Digital has been certified to NSF 50 as follows:
AcuFlow Digital connected to
AcuFlow model
AF-15
AF-15-U
AF-2
AF-2-U
AF-25
AF-3
AF-4
AF-6
AF-8
www.h2flow.net • Tel: 888-635-0296 (Toll Free)
AcuFlow Digital accuracy
L1
L1
L1
L1
L1
L1
L2
L1
L1
20
Flow Range (GPM)
20-90
20-90
20-110
20-110
20-110
90-240
150-450
300-1000
600-1800
(+1) 419-841-7774 (International)
OR