Ransburg DynaFlow User Manual - Manual (Page 97)

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DynaFlow TM User Manual - Appendix
ADDENDUM C:
FLOW LIMITATIONS
Because of the way the DynaFlow determines flow rate from a flowmeter, it has limitations where it
can no longer detect flow at the low end and at the high end. (It uses a software timer to determine
the time between pulses rather than a high speed counter card.) The low end limitation is because
the timer overflows between pulses and at the high end, the scan time of the program cannot keep
up with the speed of the incoming pulses.
Because of this fact, the DynaFlow cannot see flow at the low end when the pulses fall below 1 Hz
(one pulse every second).
- With a gear-type flowmeter calibrated to 4,500 pulses/liter, the DynaFlow will not detect flow
below 13.3 cc/min.
- With a gear-type flowmeter calibrated to 8,000 pulses/liter, the DynaFlow will not detect flow
below 7.5 cc/min.
- With a gear-type flowmeter calibrated to 40,000 pulses/liter, the DynaFlow will not detect flow
below 1.5 cc/min.
- With a piston flowmeter calibrated to 60,000 pulse/liter, the DynaFlow will not detect flow below
1 cc/min.
At the high end, the DynaFlow cannot see flow when the pulses exceed 435 Hz.
- With gear-type flowmeter calibrated to 4,500 pulses/liter, the DynaFlow will not detect flow
above 5,800 cc/min.
- With gear-type flowmeter calibrated to 8,000 pulses per liter, the DynaFlow will not detect flow
above 3,275 cc/min.
- With a gear-type flowmeter calibrated t 40,000 pulses/liter, the DynaFlow will not detect flow
above 655 cc/min.
- With a piston flowmeter calibrated to 60,000 pulses/liter, the DynaFlow will not detect flow
above 435 cc/min.