Flow Meter

NivuFlow 750

Part No. NF7

Flow measurement with cross correlation technology

For ultrasonic flow measurement of slight to heavily polluted media in part filled and full pipes and channels. Best possible results even under difficult conditions.

  • Very high accuracy flow meter by means of ultrasonic cross correlation method
  • Certified according to MCERTS - Sira MC160303/00
  • Up to 3 measurement spots as well as up to 9 flow sensors (Version M9)
  • Real-time indication of real flow velocity profiles
  • Suitable even for very demanding applications
  • Intuitive, modern operating concept for quick and easy commissioning
  • Large colour graphic display
  • Integrated numeric flow models
  • Ultrasonic flow measurement in all channels, part filled and full pipes as well as flumes
  • No calibration required
  • Comprehensive diagnostic functions for reliable commissioning and quick maintenance
  • Spatial allocation of measured single velocities
  • Compact DIN rail flow meter for narrow switching cabinets
  • Field enclosure with large terminal housing for comfortable installation on site
  • Quick wiring thanks to front-side access
  • Universal standardised interfaces for easy connection
  • IoT-ready with global 4G connectivity for highest availability and digital services
  • Energy-saving cycle operation for self-sufficient systems

 

Flow metering at the highest technical level

The NivuFlow 750 flow meter is the successor to the well-known OCM Pro CF. Compact dimensions of the flowmeter allow DIN-rail installation and installation in switching cabinets even under confined space conditions and in narrow housings.

Combined front-side cage spring terminal clamps ensure quick and easy wiring as well as quick and easy transmitter exchange without tools.

The modern, intuitive one-hand operation using the rotary pushbutton in context with the high-resolution, easy-to-read graphic colour daylight display allows very quick and easy, cost-efficient commissioning on site. No extra input devices or software components are required.

The latest integrated discharge allow even more accurate and more stable investigation of flow rates at high operational reliability even under very difficult measurement conditions. Based on the ultrasonic correlation method, individual velocities are detected in different levels of the flow section. A real 3D flow profile is calculated in real time and is indicated in a reproducible and verifiable manner on the flow meter diaplay. Influencing factors such as flume shape, discharge behaviour and wall roughness are taken into account and are considered while computing the flow.

The NivuFlow 750 offers control function as well. i.e. for flow control in storm water basins or storm water retention basins as well as in sewers with storage capacity and overflow.

The NivuFlow 750 flow meter features quickest possible signal processing, Modbus TCP/RTU as well as online connection via Internet.

For flow velocity measurement starting at flow levels as low as 3 cm through several meters in flumes and channels with various shapes and dimensions, there is a wide variety of sensors tailored to your application available.

 

On site from anywhere

NivuFlow750 flow meter provides options for remote maintenance, remote diagnostics and for flexible integration into process control systems and telecontrol networks.
Thanks to the integrated web server NivuFlow 750 there is an own web site available via TCP/IP. This allows to connect the unit to the worldwide Internet as well as to internal networks.

 

Typical applications

  • WWTPs
  • Channel networks
  • Discharge structures
  • Industrial wastewater networks
  • Discharge
  • Drainage lines
  • Return sludge lines
  • Recirculation lines
  • and many more
Technical Data
Common
Power supply

100...240 V AC, -15 % / +10 %, 47...63 Hz or 10...35 V DC

Power supply connection
  • AC: Plugged and screwed on spring-cage terminal block
  • DC/DL: Plugged spring-cage terminal block
Maximum power consumption
  • AC: 30 VA
  • DC: 20 W
Typ. power consumption
  • 1x POA-VxU1 + 1x i-Sensor + 1 Relay energised + 1x iXT
  • 230 V AC: 14 VA / 6.8 W 
  • 24 V DC: 6.2 W 
Enclosure

DIN Rail

  • Material: Aluminium and Plastic 
  • Weight: approx. 1300 g

Field Enclosure

  • Material: Polyamide PA / Polycarbonate PC
  • Weight: approx. 4000 g (incl. NF750 and iXT0 211) 
Protection

DIN Rail

  • IP20

Field Enclosure

  • IP67 (option IP68)
Operation conditions
  • Protection Class I
  • Overvoltage Category II
  • Pollution Degree 2
Operation altitude

AC unit for use at altitudes up to 3000 m above MSL. For relay voltages >150 V, use is restricted to altitudes up to max. 2000 m above MSL (AC and DC units)

Operating temperature
  • DC: -20...+70 °C
  • AC: -20...+65 °C
Storage temperature

-30°C ... +80°C

Max. ambient temperature for installation and operation

+50 °C

Max. humidity

80%, non-condensing

Display
  • Daylight-readable TFT colour graphic display
  • 240x320 pixel
  • 65536 colours
Parameterisation / Programming

Menu-driven using rotary pushbutton an two function keys, in English, German, French, Italian, Spanish, Portuguese, Swedish, Danish, Finnish, Polish, Hungarian, Romanian, Czech, Russian, Korean and Chinese language

Connection
  • General: Plugged spring-cage terminal block
  • AC Power Supply: Plugged and screwed on spring-cage terminal block
Inputs
  • 1x 4...20 mA for external level (2-wire probe)
  • 1x 4...20 mA for external level (2-wire probe; HART)
  • 1x RxTx-Bus for NIVUS air-ultrasonic active sensor (OCL)
  • 1x (only for Type S1/G1), 4x (only for Type SR/GR) or 7x (only for Type M3/G3/M9/G9) 0/4...20 mA with 12-bit resolution for external level, external control setpoint and data storage of external devices, accuracy±0.4 % of the measured value range (20 mA), load 91 Ohm
  • 2x (only for Type S1/G1), 7x (only for Type SR/GR) or 10x (only for Type M3/G3/M9/G9) digital input
  • 1x (only for Type S1/G1/SR/GR), 1...3x (only for Type M3/G3) or 3x (only for Type M9/G9) velocity sensors (POA, CS2 or EBM + CSM) or iXT or MPX connectable
Outputs
  • 2x (only for Type S1/G1) or 4x (only for Type SR/GR/M3/G3/M9/G9) 0/4...20 mA, load 500 Ohm, 12 bit resolution, accuracy better than ±0.1 % at 20 °C (better than ±0.4 % at -20…+70 °C)
  • 1x bistable relay (SPDT) (only for type S1/G1/SR/GR), loadable up to 230 V AC / 2 A (cos j 0.9), minimum switching current 100 mA
  • 1x (only for Type S1/G1), 4x (only for Type SR/GR) or 6x (only for Type M3/G3/M9/G9) relay (SPDT), loadable up to 230 V AC / 2 A (cos j 0.9), minimum switching current 10 mA
Controller

1x 3-step controller, quick close control, adjustable slide valve position in the event of an error (controller only available for Types SR/GR/M3/G3/M9/G9)

Data memory
  • Internal 1.0 GB, for parameterisation/programming and measurement backup for approx. 570,000 data sets (time stamps); 
  • can be read via front-side USB stick 
Storage cycle

30 seconds to 15 minutes

Communication
  • Modbus TCP via networks (LAN/WAN)
  • Modbus RTU via RS485 or RS232
  • SMTP/FTP/HTTP
  • 2G/3G/4G via built-in radio communications modem (only with Type G1/GR/G3/G9)

Specifications subject to change.

Downloads

Brochure | NivuFlow 750

High accurate flow measurement for slightly polluted and dirty media in part filled and full pipes, channels and more.

Instruction Manual | NivuFlow 750 / NivuFlow 700 (Rev. 02)

Declaration of conformity "Permanent flow measurement transmitter with internal modem for remote data transmission "NF7..../ NR7..."with

Declaration of Conformity NivuFlow 7xx

Technical Instructions | "NIVUS Modbus TCP/RTU" (Rev. 04)

MCERT | NivuFlow 750 (incorporating POA-K sensor) Echo Profile Flowmeter

MCERT | NivuFlow 750 Echo Profile Flowmeter with POA-R sensor and i-Sensor

MCERT | NivuFlow 750 Echo Profile Flowmeter and POA-R sensor

 

Tender Specification "NivuFlow 750"

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