Measurement
Volumetric flow in filled flow conduits 2" - 96" (5-244 cm)
in diameter utilizing insertable velocity sensor. Flow indication in
English or Metric units.
Local Velocity Measurement
Method: Electromagnetic (Faraday's Law)
Range: -5 to +20 ft/s (-1.5 to +6.1 m/s)
Zero Stability: ±0.03 ft/s (±.009 m/s)
Accuracy: ±2% of reading ± zero stability at -3 to +10 ft/s (-0.9 to
+3 m/s)
- Resolution: 0.01 ft/s (3.05 mm/s)
Pressure/Temperature Measurement
PVC Insertion Tube: 150 PSI up to 105°C
Stainless Steel Insertion Tube: 250 PSI up to 160°F (71°C)
(MMI recommends the use of Stainless Steel)
Materials
Sensor: Polyurethane exposed to flow
Cable: 20 ft. Polyurethane jacket
1" Sensor Mounting: 316 Stainless Steel exposed to
flow.
2" Sensor Mounting: PVC and Ductile Iron exposed to
flow. (Stainless Steel optional)
Compression Seal: Neoprene Rubber exposed to flow.
Sensor Selection
Pipe sizes 2" (5 cm) to 30" (76 cm) -
1" sensor (1" Sensor recommended for clean water
applications only up to 30". Clean water applications
over 30" should use 2" sensor.) Pipe sizes 6"
(15 cm) to 96" (244 cm) - 2" sensor
Enclosure
NEMA 4X/IP65. Separate termination and electronics
compartments. Glass filled polypropylene with clear clear
polycarbonate cover.
Dimensions: 8.4"H x 6.4"W x 2.8"D
(214 mm x 161.5 mm x 70 mm)
Weight: 3.2 lbs. (1.,5 kg)
Configuration and Set-Up
Programming can be easily accomplished on site using the
keypad. Two levels of user defined password protection are
provided.
-
- Outputs
Analog: Galvanically isolated and fully programmable for
zero and full scale. Output capability <16V (800 ohm,
4-20 mA). Secondary range enabled by external input or
programmed alarm condition as a percent of full scale.
Pulse Frequency: One frequency/pulse output for flow rate
and for external totalizer. Isolated protected transistor
switch capable of sinking <250mA @ <35V.
Dual Alarms (2 separate outputs): Isolated protected
transistor switch capable of sinking <250 mA@<35V.
(Note: Not isolated from frequency output.) Fully
programmable for high/low flow rates, empty-pipe, fault
conditions, forward/reverse, polarity (normally open/close),
analog over-range, pulse over-range, pulse cutoff, etc.
Electrical Connections
0.5 inch NPT with gasket seal
Keypad and Display
Can be used to access and change all set-up parameters using four
membrane keys and 3-line display.
3-line, 16 character, backlit LCD display with large 1/2"
numerals for flow rate and two lines for engineering units, totalizers,
alarm status, velocity and percent of range.
Isolation
Galvanic separation to 50VDC between analog, pulse/alarm, and
earth/ground.
Electrical Safety
Meets ANSI/ISA-S82.10-1988 and S82.03-1998.
Power Supply
Universal switch mode.
AC: 85 to 265V to 400 Hz at 20VA max. or
DC: 11 to 40V at 20VA max.
AC or DC must be specified at time of ordering.
Vibration Specification
Meets BS2011: Part 2, 1 Fc: 1983
Internal Totalizer
9-digit totalizer. Can be programmed to reset via external input or
the keypad. Reset from keypad can be password protected.
Test Mode and Output Circuit Loop Verification
After transmitter has been programmed, operation of the test mode will
drive all outputs to programmed value, providing a total system test.
Ordering
Information
The Flo-System Model 282 is a real-time, full pipe flowmeter. Standard
models include a NEMA 4X enclosure, a 4-key membrane keypad, a three line
back-lit display, choice of a 1" or 2" electromagnetic velocity
sensor, 20 feet of sensor cable; standard sensor mounting hardware, a flow
proportional or frequency output (transistor type) for flow rate or for
external totalizer, a 4-20 mA output for flow and one instruction manual.
Accessories
include sun shield, stainless steel tag, pole mount kit, additional cable
(maximum cable length 300') and additional instruction manuals.
SEE SENSOR INSTALLATION ACCESSORIES INFORMATION
