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Originally Posted by Roscal
If ratio = 1 then 15530=15530 pulses/minute -> 255 pulses/sec which is equal to 255Hz so flowrate = 2.55 LPM .
I don't know what PPR is but I assume PPR is ratio, isn't it? For fans, ratio is typically=2 (2 pulses per rev). If ratio=2 then real frequency is 255*2 so flowrate will be 5.10 LPM. Leave ratio=1 if you can, it's easier to calculate in mind.
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Yes, I believe PPR is pulses per rev. Standard PPR for fans seems to be 2. So I guess this meter should be 1. That is certainly good news but still not what I was hoping for. This means that meter is very restrictive. That is 1.34GPM. I was getting 2GPM with the same block with the other flow meter with a lot more piping. Damn....
Thanks for your help!