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2. Operation
2.1 LCD Display
The presence of an input signal is indicated by movement of the flow indicator (propeller) in
the bottom left of the display. At low input frequencies the flow indicator will move upon
receipt of each individual input pulse, and at higher input frequencies it will rotate at a fixed
speed.
The LCD display will update with a frequency of 1Hz when the instrument is operating on
battery power; this will increase for a period of 30 seconds following a button press to 8Hz for
totals and 4Hz for flowrate. When powered by external DC or Loop power the LCD will update
at a constant 8Hz/4Hz.
Upon entering the programming mode
the LCD will conduct a display test
where all LCD segments are displayed
for 3 seconds
Rate display is indicated by the RATE
flag in the bottom row of the display.
8 digits are available for Rate display,
user selectable for up to 3 decimal
places.
Rate units and time-base are displayed
at the top of the display. Rate units
may differ from Total units (e.g. Litres
and mL/min)
Total display and Accumulated Total
displays are also indicated clearly with
identifiers shown in the bottom row of
the display.
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General