Global Water
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The flow computer incorporates true velocity averaging for the most
accurate flow measurements. The computer’s primary display shows
the instantaneous velocity and is updated once per second. A
secondary display can be toggled between average velocity,
minimum or maximum velocity, and a timer than can be used to
measure the length of time in seconds that measurements are being
taken. A reset function allows the average, minimum and maximum
velocity measurements to be restarted; as well as resetting the timer
to zero. Up to 30 separate measurements of average, minimum and
maximum velocity can be stored in memory and viewed at any time.
Velocities can be displayed in both feet per second or meters per
second, a simple menu function allows you to switch between these
units at any time without changing previously stored data.
The flow probe computer is self contained and sealed. It has an
internal lithium battery that should last approximately 5 years
depending on use. The computer floats, and is shock and water
resistant for safe use in rugged wet environments.
IV.
General Instructions
a. Remove any debris that may interfere with the flow
probe’s propeller. Make sure that the propeller turns
freely by blowing on it. Some chattering of the propeller
in air is normal, the bearing is designed to operate best
when wet.
b. Point the propeller directly into the flow you wish to
measure. Face the arrow inside the propeller housing
downstream. The FP111 probe handle is a two-piece rod
expandable from approximately 3’ to 6’, the FP211 is a
three-section rod expandable from 5’ to 15’, the FP311 is
a shorter version of the FP211 from 2.5’ to 5.5’. To
expand the rod for correct placement in flow, loosen the
locking nut on the handle. To aid in properly orienting the
flow probe inline with flow, an optional alignment fin is
available from Global Water, part number BA0210.
