Quote Originally Posted by Martinm210 View Post
If it's just for personal use and monitoring relatively differences, you can just pick one of the default calibration values. The AQ5 gives a "High flow", "5.6mm", and "3.3mm", but when I tried high flow with an BP 90 elbow at the outlet, I noticed it was reading about 20% low compared to my king flow meter. Since I already had the king meter, I simply went in and adjusted the pulses/liter until the two matched. If you didn't have another meter you trusted, you'd have to do some sort of flow test using a pair of 5 gallon buckets or something similar to that and measure how long it takes to transfer the water across and what the meter tells you.

But, that's only if you really wanted it accurate. I just know that barbs vary quite a bit on what their actual ID is and things like elbows would influence the result too. Not a big deal for general info, but I wouldn't take the number given as accurate without calibrating it and checking.
Any adjustments/calibration would be made in the AQ5 correct? My originally plan was to use flow meters merely to verify that there was flow. But now that I think about it since both my pumps have an RPM senor it would be redundant to use these flow meters unless I actually wanted to know more the respective flows. Thanks.