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iSOLV LevelWizard II Open Channel Flowmeter


The LevelWizard II 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 other 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 II 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.

Application reference:


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Features


• The LevelWizard II 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 II Open Channel Flowmeter can be operated remotely by a PC or other equipment.

• The LevelWizard II Open Channel Flowmeter can be programmed either by thebuilt-in keypad or by using 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 the information is retained in the event of power interruption. A second backup copy of all parameters can also be retained in the LevelWizard II Open Channel Flowmeter, in case a previous set of parameters needs to be restored.

Application


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

Specifications


Physical
 • Weight Nominal: 1 kg (2.2 lbs)
 • Transducer Cable: Three-core screened, can be extended with 2 or 3 core screened
 • Maximum Separation: 500 m
 • Cable Entry Details 10 cable entries - 5 x M20, 1 x M16 underside, and 4 x 18mm at rear
 • Enclosure: 240 x 184 x 118 mm, Polycarbonate, ame resistant to UL94-5V
 • IP Rating: IP 65
 • Min & Max. Temperature (electronics): -20 °C to 55 °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)
 • Maximum Range: 6 meters (dB6 transducer), 10 meters (dB 10 transducer)
 • Minimum Range: Dependent on transducer
 • Reading Response: Fully adjustable

Outputs
 • Analog Output: Isolated output 4-20mA or 0-20mA into 500 (user programmable), 0.1% resolution
 • Digital Output: Full Duplex RS232 via RJ11 port
 • Optional: RS485 conn for Modbus with Probus DP V0 or V1 options
 • Volt free contacts, number and rating: 5 form ‘C‘ ( SPDT ) rated at 5A at 115 Vac
 • Display: 2 row LCD display showing programmed scale, plus bar graph with direction indicators, remote communicator identier, program/run/test mode indicators and relay status

Programming
 • On-board Programming: Integral keypad
 • PC Programming: Via RS232 (RJ11 port) or RS485 (optional)
 • Programming Security: Via Password (User Selectable and Adjustable)
 • Programmed Data Security: Via non-volatile RAM, plus backup
 • Data Logging (Optional): Via RJ11 port has 256kb giving 1 year at 15 min intervals (uses PC Suite software)

Supply
 • Power Supply: 85 - 264Vac, 50/60Hz, 22-28Vdc

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