Flow Meter

OCM F Flow Meter

Part No. OCF-0

for flow measurement based on the Doppler principle

For ultrasonic flow measurement of slight to heavily polluted media in part filled an full pipes and channels. Complete measurement system in connection with KDA sensors

[Translate to English:] Durchflussmessumformer OCM F

[Translate to English:] OCM F Durchflussmessung Anwendungsbeispiel

[Translate to English:] OCM F verschiedene Gerinneformen

[Translate to English:] OCM F Anwendungsbeispiel

Reasonable purchase costs
Reliable, with more than 30 years of product experience
Easy mounting without additional constructions
Integrated 3-step controller
Measurement in heavily polluted and abrasive media

General Description

The OCM F flow metering system utilises a fully bidirectional ultrasonic velocity sensor.

The intelligent Doppler sensor detects and directly evaluates the flow velocity. Other than with mag meters, this method has an absolutely stable zero point. Moreover, the dynamic measurement range for minimum level and flow is very high. Level measurement can be carried out either by a sensor-integrated pressure cell or by using an external sensor.

Operation / Programming

Thanks to the intuitive user interface it is very easy to set up the OCM F for the requirements of various applications. Additional input devices like Computers etc. are not needed. Programmed settings are indicated clearly.

Measurement principle

The measurement principle is based on the classic Doppler method where an ultrasonic signal with a defined frequency is transmitted into a liquid at a known angle. A portion of the ultrasound energy is reflected by the solid particles or gas bubbles carried with the liquid. Due to the movement of the particles a frequency distortion occurs which is direct proportional to the particle velocity. The flow velocity can be determined from this frequency shift subsequently. From the flow profile and the multitude of reflecting particles a frequency spectrum results. This spectrum, suitable for hydraulic assessment of measurement places, can be indicated on the OCM F display. The newly developed intelligent Doppler sensor directly detects and evaluates the flow velocity.

Memory

The internal memory enables storage of medium velocity information as well as temperature and flow data. With the frontside USB socket measurement data as well as settings can be read out. The free NivuSoft measurement data software enables easy visualisation of readings.

Typical OCM F applications

Wastewater treatment plats: intake and discharge also for aeration tank, sedimation tank and recirculation
Permanent measurements on storm water basin and storm water retention basin
Flow measurements in channel networks
Industrial wastewater networks
and many more

Common
Power supply	100 to 240 V AC, +10 %/ -15 %, 47 to 63 Hz 24 V DC +/- 15%, 5% residual ripple
Power consumption	AC: max. 18 VA, typ. 7 VA DC: max. 15 W, typ. 6 W
Enclosure	Material: Polycarbonate Weight: approx. 1620 g
Protection	IP65
Operation conditions	Protection class I Overvoltage category II Pollution degree 2
Operation altitude	AC unit for use in altitudes up to 3000 m above MSL. At relay voltages > 150 V the use is restricted to an altitude of max. 2000 m (AC and DC units)
Operating temperature	-20 °C… +60 °C / with Ex: -20 °C… +40 °C
Storage temperature	-30 °C… +70 °C
Max. humidity	90 %, non-condensing
Display	Back-lit full graphic LCD, 128x64 pixel
Operation	6 keys, menus in German, English, French and Polish
Inputs	1 x 4 - 20 mA for external level (2-wire probe) 2 x 0/4 - 20 mA with 12 bit resolution for external level and external setpoint 4 x digital input 1 active compact Doppler sensor Type KDA connectable
Outputs	3 x 0/4… 20 mA, load 500 Ohm, 12 bit resolution, accuracy 0.1 % (after calibration) 5 relay (SPDT), max. load 230 V AC / 2 A (cos. φ 0.9)
Controller	3-step controller, quick close function, adjustable slide valve position in case of error
Data memory	4 MB, 64512 points, for programming and readings memory; read-out via front-side USB stick
Storage cycle	1 minute to 1 hour
Ex-Approval	II (2) G [Ex ib Gb] IIB
Sensor circuits	Ignition protection type Ex ib IIB
2-wire sensors per channel	Terminal no. 46…49 Uo 26.1 V Io 87.9 mA Po 574 mW (linear characteristics) Co 400 nF Lo 5 mH
Flow sensors	Terminal no. 50…54 Uo 9.9 V Io 629 mA Po 6.2 W (rectangular characteristics) Co 5 µF Lo 0.15 mH

Specifications subject to change.

Brochure OCM F

Flow Meter for part filled and full Pipes, Channels and Flumes

download file
PDF 389 KB

Instruction Manual OCM F and OCM FR

download file
PDF 4 MB

Declaration of Conformity OCM F / OCM FR / NFP

Durchflussmessumformer stationär

OCF-00 | OCF-R0 | NFP-0

download file
PDF 188 KB

Declaration of Conformity "Ex Permanent flow measurement transmitter OCM F / OCM FR / NFP

"Ex" Durchflussmessumformer stationär

OCF-02 | OCF-R2 | NFP-2

download file
PDF 247 KB

EU-Type Examination Certificate OCM F and NFP

"Ex" Flowmeter

OCF-02 | OCF-R2 | NFP-2

download file
PDF 2 MB

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