Can I accumulate pulses, and activate the output after a desired number of pulses are received?
No. The PCM control modules will output for a set number of seconds after every pulse is received. You will have to ensure that the flow rate combined with the flow meter's pulse rate is accounted for by ensuring the "on time" does not exceed the available time between pulses. If you do need to accumulate pulses, we recommend the Seametrics PT35 Pulse Timer. More information can be found on the PT35 here.