Open Channel Flowmeter

isolvThe LevelWizard Open Channel Flowmeter is non-contacting and operates on the principle of timing the echo received from a pulse of sound in air, this provides a highly accurate calculation of flow from the measured head preceding the primary element.

Flow calculations to the British Standard BS3680 are available within the software together with calculations for a wide variety of othern primary elements. Also available within the unit is a customised 32 point calibration routine which also permits the flow measurement of non – standard flumes and weirs.

For channels without primary elements the LevelWizard even offers the facility of connecting a Doppler Velocity Sensor (available from iSOLV) and performing the calculations of Flow Q = Velocity x area for a wide variety of channel shapes.

ocm_topbar

  • The LevelWizard Open Channel Flowmeter can show level, space, distance, head
    or flow on the display.
  • The relays can be programmed to activate alarms, pump starters, or other control
    equipment. There is an isolated 4-20 mA output that can be connected to a chart
    recorder or PLC, to monitor level space or distance, independently from that shown
    on the display.
  • There is an RS232 port, so that the LevelWizard Open Channel Flowmeter can be
    operated remotely by a PC or other equipment.
  • The LevelWizard Open Channel Flowmeter can be programmed either by the built-in
    keypad or byusing the Remote Communicator (optional) or by PC via the RS 232 Serial
    Interface (optional).
  • One Communicator can program many iSOLV units.
  • All the parameters are stored in non-volatile memory, so are retained in the event of
    power interruption. A second backup copy of all parameters can also be retained in the
    LevelWizard Open Channel Flowmeter, in case a previous set of parameters needs to be
    restored.

ocm_applications

Open Channel Flow Measurement
It has been specifically designed to measure influent and effluent water flow from all types of municipal and industrial treatment plants.

Technical Details
Weight Nominal 1 kg
Transducer Cable Twin Screened
Maximum Separation 500 m
Cable Entry Details 10 cable entry knockouts, 5 x PG 11, 1 x PG 9, underside,
4 x PG11 at rear
Enclosure 240 x 184 x 118 mm, Polycarbonate, flame resistant to UL94-V2
IP Rating IP 65
Max. & Min. Temperature
(electronics)
-20°C to 60°C
Flammable Atmosphere Approval: Safe Area Compatible with approved dB transducers
Performance
Accuracy 0.25% of the measured range or 6 mm ( whichever is greater )
Resolution 0.1% of the measured range or 2 mm ( whichever is greater )
Max. Range 3meters (dB3 transducer), 6 meters ( dB6 transducer ),
10 meters ( dB 10 transducer )
Min. Range Dependent on transducer
Reading Response Fully adjustable
Echo Processing
Description Patented DATEM
(Digital Adaptive Tracking and ECHO Mapping )
Outputs
Analogue Output Isolated output of 4-20 mA or 0-20 mA into 500W
(User programmable and adjustable ) 0.1% resolution
Digital Output Full Duplex RS232, Volt free contacts, number and rating 5 form ‘C‘ ( SPDT ) rated at 5A at 240 VACDisplay 6 digits plus 12 character text, plus bargraph with directionindicators, remote communicator identifier, and program/run/test mode indicators
Analogue Input 0-20 or 4-20 mA for pressure sensor, velocity sensor
Programming On-board Programming: Integral keypad
PC Programming Via RS232 RJ11 port
Programming Security Via Password ( User Selectable and Adjustable)
Programmed Data Security Via non-volatile RAM, plus backup
Supply
Power Supply 115 VAC + 5% / -10% 50/60 Hz, 230 VAC + 5% / -10% 50/60 Hz, 18-36 VDC
Note: Specification are subject to change without notice.




Share On Facebook
Share On Twitter
Share On Linkedin
Whatsapp
We Chat
Contact us

PROCESS INSTRUMENTATION & AUTOMATION