I have hooked up the bigNG and sensorbus and evrything seems fine except I am not sure about my flow rate. My DDC-2 18W's RPM cable is connected to the sensorbus flowmeter connection. I observed the following:

1 second sampling = 17.9 l/m = 9180 imp/m
2 second sampling = 2.9 l/m = 1470 imp/m
3 second sampling = 7.9 l/m = 4040 imp/m
4 second sampling = 2.9 l/m = 1470 imp/m

I know the rpm cable on the mobo shows the ~4000rpm is correct, but does this equal the impulse rate? I read somewhere that the DDC pump gives 2 impulses per RPM.

My gut feeling tells me that the 3 second sample rate is correct looking at the flow rates of all the pump tests that have been done. My loop is pretty restrictive.

Any help would be appreciated. I am thinking about flowing into a bucket to determine myself, but maybe y'all can save me some trouble.

Thanks.