FC220 Open channel flow monitoring instrumentDetailed product description：

FC220 open channel flow monitor is used for measuring open channel flow velocity and calculating total flow rate

Easy to use interface, user selectable flow meter
Accept 4-20mA water level sensor input
4-20mA output signal for recorders or displays
Relay output, used for alarm, sampling or data recording
waterproof casing

FC220 open channel flow monitor, reliable and accurate, used for measuring and summarizing open channel flow, suitable for all tanks and weirs as well as any gravity based open channel flow application. The FC220 open channel flowmeter uses a 4-20mA output water level sensor to measure water depth, such as the high-precision submerged pressure transmitter WL400 or the ultrasonic water level sensor WL700. The flow monitor calculates and displays the water flow velocity and total flow value in real time, and users can choose the measurement unit. Multiple water flow calculation models can be used. The FC220 open channel flow monitor has 8 buttons that guide users to set up a multifunctional menu.

Open channel flow rate
For any open channel with free flow, there is a specific relationship between the depth and velocity of water. Whenever a specific depth occurs, it always has the same flow velocity. Therefore, if the flow velocity at each depth is known, a depth flow relationship can be established. The FC220 open channel flow monitor supports many different types of flow calculation models, and more than 40 pre programmed tables of the relationship between water tanks and weirs are included in the FC220 open channel flow monitor. For monitoring circular and rectangular open channels, the FC220 open channel flow monitor allows users to input their own parameters, such as material, slope, and pipe or channel size. The FC220 open channel flow monitor also allows users to define standard flow formulas, which can calculate the flow of almost all tanks and weirs. Another mode allows users to input parameters that are suitable for third-order polynomials, which is particularly useful for calculating traffic based on empirical data and lookup tables. In addition, a programmable relationship table (before leaving the factory) can be stored in the processor memory of the FC220 open channel flow monitor, used to monitor applications where a single formula cannot accurately predict flow, such as riverbeds and complex geometric shapes of open channels. Users can program a 16 character name to identify the installation location or display other information about the configuration.

Depth measurement
The FC220 open channel flow monitor uses any 4-20mA water level sensor to measure the depth of water flow, such as the high-precision WL400 water level sensor, which is a fully submerged stainless steel water level sensor. The FC220 open channel flow monitor can use water level sensors of any range, but using a sensor with a range close to the expected maximum water level change will provide the best accuracy. The submerged pressure sensor should be installed slightly below the "0" water flow depth of the open channel, upstream of the throat of the water tank or weir. For open channels without any equipment, sensors should be installed below the expected minimum water depth. Due to the fact that the FC220 open channel flow monitor accepts 4-20mA input signals, the monitor can be installed up to 1000 meters away from the water level sensor.

The FC220 open channel flow monitor can also use the WL700 ultrasonic water level sensor to measure the flow of semi-solid or flow that is not suitable for standard submerged pressure sensors. Suggest using ultrasonic sensors only in areas with AC power supply. In areas without AC power, the first consideration should be to use a submerged pressure sensor.

The FC220 open channel flow monitor has a 7-digit display of flow velocity and can show large flow velocities. The accumulator of the FC220 open channel flow monitor has a maximum of 9 digits of flow stored in non-volatile memory with a password to prevent reset. The available volume units include cubic feet, gallons, million gallons, cubic meters, and liters, while the time units include seconds, minutes, hours, and days. The FC220 open channel flow monitor can display flow rates in 20 different user-defined units. The water level is calculated and displayed in feet, inches, meters, or centimeters, and the water level offset function can adjust the measured water level to compensate for changes in the installation position of the water level sensor.

The FC220 open channel flow monitor has four independent relay outputs, which are used to trigger external devices such as water quality samplers and other monitoring equipment. These relays can be programmed separately for pulse volume based triggers, and threshold settings can be used to limit the flow rate above the preset trigger level. There is also a precise and scalable 4-20mA output for monitoring flow rate using data loggers and PLC devices. The data logger with internal USB interface can record the historical data of traffic and the precise time of each relay triggering event. The software is used to program data loggers, download flow and relay data, and output them to spreadsheets. The FC220 open channel flow monitor has programmable energy-saving function, which can reduce the power supply current, which is very important for remote monitoring applications.

The casing of the FC220 open channel flow monitor is made of weather resistant injection molded material, suitable for various environments. The shell can be wall mounted, and if necessary, a conduit can be customized for connecting sensors and power.

Technical parameters of FC220 open channel flow monitoring instrument

Display/Keyboard	16 characters, 2-line LCD, backlit, 8-button touch keyboard
capacity	Flow rate: maximum 7-digit number Accumulator: Maximum 9-digit number Water level: maximum 5 digits
display resolution	Up to 3 decimal places, automatically adjusted
Precision	Sensor accuracy+formula/relationship table error+0.1%+1 digit
unit	Water level: feet, inches, meters, centimeters Volume: cubic feet, gallons, million gallons, cubic meters, liters Time: seconds, minutes, hours, days Flow rate: 20 combinations of volume and time units mentioned above
sensor input	4-20mA 2-wire or 3-wire system, 0-5VDC, 0-1VDC
output	1 4-20mA, adjustable scale 4 independent SPDT relays (8A/250VAC, 5A/30VDC, resistive)
Power supply	12VDC or 18-24VDC, ± 10%
operating current	150mA maximum,<13mA in power-saving mode
Internal fuse	315mA
power adapter	18VDC/90-220VAC
housing dimensions	180×130×35mm
weight	450g
Formula format	Manning's formula, used for circular pipes Manning's formula, used for rectangular pipes Standard flow rate formula: Q=A * (B+Ch)D 3rd order polynomial: Q=A+Bh+Chtwo+Dhthree
Pre defined traffic table
parshall flume	1", 2", 3", 6", 9", 12", 24", 36", 48", 60", 72"
Palmer Purus	4", 6", 8", 10", 12", 15", 18", 24", 30", 36"
H-shaped groove	0.4HS, 0.6HS, 0.5H, 0.75H, 1.0H, 1.5H, 2.0H
Trapezoidal groove	60°
weir	V-shaped: 22.5 °, 30 °, 45 °, 60 °, 90 °, 120 ° Rectangle: 1 ', 2', 3 ' Cipolletti: 1', 1.5', 2', 3', 4'
Note:	The values in the table are calculated based on specific flow formulas
Customized flow meter	One flow meter can be customized, and a depth flow formula or comparison table is required

Standard Configuration
BJ1000FC220-AC open channel flow monitor, AC power supply, does not include flow sensor, please specify the type of tank/weir when ordering
BJ2000FC220-DC open channel flow monitor, DC power supply, does not include flow sensor, please specify the type of tank/weir when ordering
BJ3000FC220-AC-D open channel flow monitor, AC power supply, with USB interface data logger and software, does not include flow sensor, please specify the type of tank/weir when ordering
BJ4000FC220-DC-D open channel flow monitor, DC power supply, with USB interface data logger and software, does not include flow sensor, please specify the type of tank/weir when ordering

Accessory Selection
Water level sensors: WL400, FL400, WL450, WL700, etc
BH0500FCBAT open channel flow monitor with weatherproof casing and 12V/4.5Ah rechargeable battery