Nova-Tech LMI Series HH Metering Pump - Manual (Page 35)

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13.2.2 Menu Item 3: Automatic Voltage Compensation
Menu item 3 enables (1) or disables (0) automatic voltage com-
pensation. This unique feature allows a constant power level to be
delivered to the EPU of the pump, even when the voltage of the
external power source is fluctuating. This results in smooth pump
output in spite of fluctuating voltage and prevents overheating.
Automatic voltage compensation becomes active two minutes
after power up.
13.2.3 Menu Items 4 and 5: Flow Monitoring
These menu items are not applicable to the Series HH9 metering
pump. Menu item 4 must be disabled (0).
13.2.4 Menu Item 6: Input Signal Pulse Width (Debounce)
Menu Item 6 determines the "debounce" period (pulse width) to be
applied to incoming pulse (pacing) signals. The default value is 15,
which corresponds to a debounce value of 60 mSec . Each
unit corresponds to approximately 4 mSec. This means that in order
to be recognized, an input signal must be at least 60 mSec in duration.
This setting may need to be reduced from its maximum setting for
high frequency input pulse signals such as those from a Hall Effect
flowmeter.