Xylem FC220 OPEN CHANNEL FLOW MONITOR - Manual (Page 3)

Global Water
800-876-1172
• globalw.com
- 3 -
I. FC220 Flow Monitor Description
The Global Water FC220 Flow Monitor is a reliable and accurate instrument for
measuring and totalizing water flow in a wide variety of applications. Water level is
measured using Global Water’s popular WL400 level sensor, WL700 ultrasonic
sensor, or almost any other 4-20mA, 0-5V or 0-1V water level sensor. Flow is then
calculated by the microprocessor using a variety of different techniques. The backlit
LCD display shows real-time flow, water level or total flow in user selectable units;
and the 8-button keypad easily guides the user through the versatile setup menus.
The FC220 supports several different types of flow calculation modes. Over 40
preprogrammed flume and weir equations are included. For monitoring in round pipes
and open rectangular channels; the Manning’s Equation mode allows the user to enter
their own parameters for material type, slope and pipe or channel dimensions.
Standard flow equations can also be defined; which can calculate flow for almost all
flumes and weirs. Another mode lets the user enter parameters for a best fit 3
rd
order
polynomial that is useful for calculating flow based on empirical data and lookup
tables. In addition, a factory programmable lookup table can be permanently stored in
the processors memory for monitoring in applications where a single equation can’t
accurately predict flow, such as streambeds and open channels with complicated
geometry. A 16-character name can be programmed into the FC220 by the user to
identify the installation site or show other information about the configuration.
Water flow is displayed with up to 7 digits which allows for the display of flow in the
largest applications. The totalizer records flow volume up to 9 digits with floating
point and scientific (engineering) notation supported in non-volatile memory, and is
password protected from reset. The maximum recordable total volume is more than
one trillion cubic feet. Available volume units are cubic feet, gallons, million gallons,
cubic meters and liters; time units include seconds, minutes, hours and days. This
allows for the display of flow in 20 different user defined units. Water level is
calibrated and displayed in feet, inches, meters or centimeters; and a level offset
function allows the measured level to be adjusted to compensate for variations in
sensor installation. The engineering units for all display modes and setup parameters
are independently programmable, which allows for the greatest possible versatility.