Nivus ocm pro cf Instruction Manual

Instruction manual

OCM Pro CF

®

OCM Pro CF - Rev. 09 as of 07.06.2016 page 1

Instruction Manual for

OCM Pro CF Measurement Device

(Original Instruction manual – German)

NIVUS GmbH

Im Taele 2
75031 Eppingen, Germany
Phone [phone] / 91 91 - 0
Fax [phone] / 91 91 - 999
E-mail: [e-mail]
Internet: www.nivus.com

valid as of Software Revision No. 5.08

Firmware Radar: v1.00

Branch offices

page 2

®

IVUS AG

NIVUS Sp. z o.o.

Hauptstrasse 49
CH - 8750 Glarus
Tel.: [phone]
Fax: [phone]
E-Mail: [e-mail]
Internet: www.nivus.de

NIVUS Austria

Mühlbergstraße 33B
A-3382 Loosdorf
Tel.: [phone]
Fax: [phone]
E-Mail: [e-mail]
Internet: www.nivus.de

NIVUS France

14, rue de la Paix
F - 67770 Sessenheim
Tel.: [phone]
Fax: [phone]
E-Mail: [e-mail]
Internet: www.nivus.com

NIVUS U.K. Ltd

Wedgewood Rugby Road
Weston under Wetherley
Royal Leamington Spa
CV33 9BW, Warwickshire
Tel.: [phone]
E-mail: [e-mail]
Internet: www.nivus.com

NIVUS U.K.

1 Arisaig Close
Eaglescliffe
Stockton on Tees
Cleveland, TS16 9EY
Phone: [phone]
E-mail: [e-mail]
Internet: www.nivus.com

ul. Hutnicza 3 / B-18
PL - 81-212 Gdynia
Tel.: [phone]
Fax: [phone]
E-Mail: [e-mail]
Internet: www.nivus.pl

NIVUS Middle East (FZE)

Building Q 1-1 ap. 055
P.O. Box: 9217
Sharjah Airport International
Free Zone
Tel.: [phone]
Fax: [phone]
E-Mail: [e-mail]
Internet: www.nivus.com

NIVUS Korea Co. Ltd.

#411 EZEN Techno Zone,
1L EB Yangchon Industrial Complex,
Gimpo-Si
Gyeonggi-Do 415-843,
Tel. [phone]
Fax. [phone]
E-Mail: [e-mail]
Internet: www.nivus.com

Instruction manual

OCM Pro CF

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OCM Pro CF - Rev. 09 as of 07.06.2016 page 3

Translation

If the device is sold to a c ountry in the European currency area, th is in­struction handbook m ust be translated into the lan guage of the country in
which the device is to be used.
Should the translated text be unclear, the original instruction handbook
(German) must be c onsulted or the manufacturer contacted for c larifica­tion.

Copyright

No part of this publication may be reproduced, transmitted, sold or dis­closed without prior permission. Damages will be claimed for violations.
All rights reserved.

Names

The use of general desc riptive names, trade names, t rademarks and the
like in this handbook does not entitle the reader to assume they may be
used freely by everyone. T hey are often protected registered tradem arks
even if not marked as such.

Instruction manual

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1 General ................................................................................. 7

2 Safety Instructions and Hazard Warnings ......................... 9

2.1 Used Hazard Warnings ................................................................. 9

2.2 Safeguards and Precautions ....................................................... 10

2.3 Liability Disclaimer ....................................................................... 10

2.4 User’s Responsibilities ................................................................ 11

2.5 Device Identification .................................................................... 12

2.6 Installation of Spare Parts and Parts subject to wear and tear ... 13

2.7 Device Versions .......................................................................... 13

3 Overview and Intended Use .............................................. 14

3.1 Overview ..................................................................................... 14

3.2 Intended Use ............................................................................... 16

4 Specifications .................................................................... 17

5 Storing, Delivery and Transport ....................................... 18

5.1 Receipt ........................................................................................ 18

5.2 Delivery ....................................................................................... 18

5.3 Storing ......................................................................................... 18

5.4 Transport ..................................................................................... 18

5.5 Return .......................................................................................... 18

6 Functional Description ...................................................... 19

6.1 General ........................................................................................ 19

6.2 Level measurement using water ultrasound ............................... 23

6.3 Level Measurement using Pressure ............................................ 24

6.4 Level Measurement using external Leve l Sensor ....................... 24

6.5 Flow Velocity Detection ............................................................... 25

6.6 Flow velocity via Surface Radar OFR ......................................... 27

7 Installation and Connection .............................................. 28

7.1 Installation Instructions ................................................................ 28

7.1.1 Fastening Wall Mount Enclosure ................................................ 28

7.1.2 Wall Mount Enclosure Dimensions ............................................. 29

7.2 Electrical Installation.................................................................... 30

7.2.1 Connection of Transmitter in Wall Mount Enclosure ................... 30

7.2.2 Sensor connection - Wall mount enclosure ................................ 34

7.2.3 Wall Mount Enclosure Overvoltage Protection ........................... 38

7.3 Connection of the panel mount enclosure................................... 41

7.3.1 Fastening the panel mount enclosure ......................................... 41

7.3.2 Panel Mount Enclosure Dimensions ........................................... 41

7.3.3 Panel Mount Enclosure Transmitter Connection ........................ 41

7.3.4 Panel mount enclosure sensor connection ................................. 43

7.3.5 Panel Mount Enclosure Overvoltag e Pr otec t ion ......................... 47

7.4 Power Supply Wall and Panel Mount Enclosur e ......................... 49

7.5 Regulator Mode ........................................................................... 50

7.5.1 General ........................................................................................ 50

7.5.2 Construction of Measurement Section ........................................ 52

7.5.3 Regulator Mode Wiring Diagram ................................................. 53

7.5.4 Control Algorithm ......................................................................... 53

7.6 Communication ........................................................................... 54

7.6.1 General ........................................................................................ 54

7.6.2 Communication Options .............................................................. 56

7.6.3 Communication Setup via Acc es s Portal .................................... 57

7.6.4 Data Transmission ...................................................................... 59

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8 Initial Start-Up .................................................................... 65

8.1 General ........................................................................................ 65

8.2 Operator Panel ............................................................................ 66

8.3 Display ......................................................................................... 67

8.4 Operation Basics ......................................................................... 69

9 Parameter Setting .............................................................. 70

9.1 Setting Basics .............................................................................. 70

9.2 Operation Mode (RUN) ............................................................... 73

9.3 Display Menu (EXTRA) ............................................................... 77

9.4 Parameter Menu (PAR) ............................................................... 79

9.5 Parameter Menu (PAR) ............................................................... 79

9.5.1 Parameter Menu "Measurement Place" ...................................... 79

9.5.2 Parameter Menu “Level “ ............................................................ 86

9.5.3 Parameter Menu „velocity “ ......................................................... 98

9.5.4 Parameter Menu "Analog Inputs “ ............................................. 105

9.5.5 Parameter Menu "Digital Inputs " .............................................. 107

9.5.6 Parameter Menu "Analog Outputs" ........................................... 109

9.5.7 Parameter Menu "Digital Outputs “ ........................................... 111

9.5.8 Parameter Menu "Control unit " ................................................ 114

9.5.9 Parameter Menu "Settings “ ...................................................... 122

9.5.10 Parameter Menu "Storage Mode “ ............................................ 124

9.5.11 Data Structure on Memor y Card ............................................... 128

9.5.12 Parameter Menu "Communication “ .......................................... 130

9.6 Signal Input/Output Menu (I/O) ................................................. 136

9.6.1 I/O Menu „Analog inputs ” ......................................................... 136

9.6.2 I/O Menu "Digital Inputs ” .......................................................... 137

9.6.3 I/O Menu „Analog Outputs” ....................................................... 137

9.6.4 I/O Menu „Digital Outputs” ........................................................ 138

9.6.5 I/O Menu „Sensors” ................................................................... 138

9.6.6 I/O Menu "Interfaces" ................................................................ 141

9.6.7 I/O Menu "Controller" ................................................................ 141

9.6.8 I/O-Menu "Memory Card" .......................................................... 142

9.6.9 I/O-Menu Communication ......................................................... 145

9.7 Calibration and Calculation Menu (CAL) ................................... 145

9.7.1 Cal-Menu "Level“ ....................................................................... 145

9.7.2 Cal-Menu "Flow Velocity “ ......................................................... 146

9.7.3 Cal-Menu "Analog Outputs “ ..................................................... 149

9.7.4 Cal-Menu "Relay Outputs “ ....................................................... 150

9.7.5 Cal-Menu "Simulation “ ............................................................. 151

10 Parameter Tree................................................................. 152

11 Troubleshooting .............................................................. 162

12 Verification of the Measurement Systems ..................... 166

12.1 General ...................................................................................... 166

12.2 Verification of Combi Sensor with Pressure Measurement Cell166

12.3 Verification of external Level Measurement .............................. 167

12.4 Verification and Simulation of Input and Output Signals ........... 168

12.5 Verification of Flow Velocity Measurement ............................... 168

13 Maintenance and Cleaning ............................................. 170

13.1 Transmitter ................................................................................ 170

13.2 Sensors ..................................................................................... 170

14 Accessories ..................................................................... 171

15 Table "Manning - Strickler Coefficients “ ...................... 172

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16 Emergency ....................................................................... 173

17 Dismantling/Disposal ...................................................... 173

18 Table of Pictures .............................................................. 173

19 Index ................................................................................. 177

20 Certificates and A p prov al s ............................................. 179

Instruction manual

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OCM Pro CF - Rev. 09 as of 07.06.2016 page 7

1 General

Important

READ CAREFULLY BEFORE USE
KEEP IN A SAFE PLACE FOR LATER REFERENCE

This Instruction manual for the flow measurement unit OCM Pro CF is intended
for the initial start-up of the unit depicted on the title page. This manual is orient­ed exclusively to qualified expert personnel.

Read this instruction manual carefully and completely prior to installation and
connection since it contains relevant information on this product. Observe the
notes and particularly follow the warning notes and safety instructions.
Keep this manual in a safe place and make sure it is available for the users of
this product at any time.

If you should have problems to understand information contained within this in­struction manual either contact the manufacturer or one of the distributors for
further support. The manufacturer cannot be held responsible for damage to
persons or material due to incorrectly understood information in this instruction.

In case of selling the instrument this instruction manual shall be provided to the
purchaser since it is a part of the standard delivery.

Detailed information on how to operate the complete system can be found in the
accompanying instruction manual oft NIVUS, Sensors etc.

Personnel requirements

Installation, commissioning and maintenance shall be executed only by person­nel meeting the demands as follows:

- Exper t per sonn el with rel evant tra in ing an appr opr ia te qua lif icati on

- Personnel authorised by the plant operator

Qualified personnel

within the context of this documentation or the safety notes on the product
itself are persons who are sufficiently familiar with installation, mounting, start­ing up and operation of the product and who have the relevant qualifications
for their work; for example.

- Training, instruction or authorisation to ac t iv ate/ deac t ivate, is ol ate, ground,

and mark electric circuits and devices/systems according to the safety en­gineering standards.

- Education and instruction according to the standards of safety engineering

regarding the maintenance and us e of adequa te safety equipment.

- First aid training

Instruction manual

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Applicable documentation

For the installation and operation of the complete system extra instruction man­uals or technical descriptions may be required apart from this manual.

- Technical Instructions for correlation sensors and Electronic box

- Technical and Installation Instruction for Radar sensors OFR

These manuals are provided with the auxiliary units or sensors.

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OCM Pro CF - Rev. 09 as of 07.06.2016 page 9

DANGER

WARNING

WARNING

CAUTION

2 Safety Instructions and Ha zard Warnings

2.1 Used Hazard Warning s

The general warning symbol indicates the risk of personal injuries or death. In
the text section the general warning symbol is used in conjunction with the
signal words described below.

Hazard warnings

Indicates an immediate high risk which may result in death or severe personal
injury if not avoided.

Danger of electrical shock

Indicates a possible danger by electrical power with moderate risk which may
result in death or severe personal injury if not avoided.

Warning notice

Indicates a possible danger with moderate risk which may result in death or
severe personal injury if not avoided.

Notes for caution

Indicates a possible danger with moderate risk that may result in minor or
moderate injury or may result in property damage, if not avoided.

Important Note

Indicates a situation that could cause damage on this instrument if it is not
avoided.

Contains information that should be highlighted.

Note

Indicates a situation that will not result personal injury.

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WARNING

WARNING

WARNING

WARNING

2.2 Safeguards and Precautions

Germ contamination

Please note that due to the operation in the waste water field the measure­ment system and cables may be loaded with dangerous disease germs. Re­spective precautionary measures must be taken to avoid damage to one’s
health.

Wear protective clothing.

Observe regulations for health and safety at work

Before starting installation w ork , observing the work safety regulations need to
be checked.

Failure to do so may cause personal injury..

Do not disable safety devices!

It is strictly prohibited to disable the safety devices or to change the way they
work.

Failure to observe may cause personal injury as well as to system damage.

OCM Pro CF

2.3 Liability Disclaimer

Disconnect from power supply

Disconnect the instrument from power supply before you begin to execute
maintenance, cleaning and/or repair works. Repair works shall be executed
solely by expert personnel.

Disregarding may lead to electrical shocks.

Important Note

The entire measurement system shall be installed and put into oper ation only
by qualified personnel.

The manufacturer reserves the right to change the contents of this document in­cluding this liability disclaim er without pr ior notice and cannot be held responsi­ble in any way for possible consequences resulting from such changes.

For connection, initial start-up and operation of the OCM Pro CF the following in­formation and higher legal regulations (e.g. in Germany VDE), such as Ex­regulations as well as safety requirements and regulations in order to avoid ac­cidents, must be kept.
All operations on the device which go beyond installation or connection
measures in principle shall be carried out by NIVUS staff or personnel author­ised by NIVUS due to reasons of safety and guarantee. The manufacturer is not
liable for failures resulting from improper or inappropriate use.

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OCM Pro CF - Rev. 09 as of 07.06.2016 page 11

2.4 User’s Responsibilities

Important Note

In the EEA (European Economic Area) national implementation of the frame­work directive 89/391/EEC and corresponding individual directives, in particu­lar the directive 89/655/EEC concerning the minimum safety and health re­quirements for the use of work equipment by workers at work, as amended,
are to be observed and adhered to.

The customer shall obtain any local operating permits required and observe the
provisions contained therein.
In addition to this, he must observe local laws and regulations on

- personnel safety (accident prevention regulations)

- safety of work materials and tools (safety equipment and maintenance)

- disposal of products (laws on wastes)

- disposal of materials (laws on wastes)

- cleaning (cleansing agents and disposal)

- environmental protection

Connections:

As an operator make sure prior to activating the OCM Pro CF that duri ng ins ta l­lation and initial start-up, if executed by the operator himself, the local regula­tions (such as regulations for electrical connection, operation in channels) are
observed.

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2.5 Device Identification

The instructions in this manual are valid only for the type of device indicated on
the title page. The nameplate is fixed on the bottom of the device and contains
the following:

- Name and address of manufacturer

- CE label

- Type and serial number

- Year of manufacture

- Ex-label (on Ex-version devices only) as mentioned in chapter Specifica-

tions.

It is important for queries and replacement part orders to specify type, year of
manufacture and serial number (Article no. if necessary). This ensures correct
and quick processing.

OCM Pro CF iin front panel enclosure with S4/M4 backplane:

OCM Pro CF

OCM Pro CF in wall mount enclosure with S3/M3 backplane:

OCM Pro CF in wall mount enclosure with S4/M4 backplane:

Ex nameplate:

Fig. 2-1 OCM Pro CF nameplates

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OCM Pro CF - Rev. 09 as of 07.06.2016 page 13

OCP-

Type
S4

M4

R4

F0
W0

00
IN
MA
MI
MG

A4
D4

0
E

OCP-

Intrinsically safe sensor supply in Ex zone 1

Internet communication via GPRS (GSM antenna required) (for W0

Power Supply

100-240 V AC / 47-63 Hz

9-36 V DC

ATEX Approval s

none

Internet communication via internal ISDN modem (for W0 enclosure)

Standard version w ith 2 relays, 2 mA output (galv. isolated), 1 mA input
(galv. isolated w ith 2-w ire sensor supply) or for external level measurement

Multifunctional version w ith 5 relays, 4 mA outputs (galv. isolated), 4 digital inputs, 5 analog
inputs (1 of them galv. isolated with 2-w ire sensor supply), integrated 3-point step controller
with flush function, connecting options for up to 3 sensors

Panel mounting IP54 / IP20, no data transmission available

Construction

Wall-mounting IP65

Data Transm ission

without Internet comm unication (for F0 enclosure)

Internet communication via Intranet (for W0 enclosure)

Internet communication via internal analog modem (for W0 enclosure)

Multifunctional version w ith 5 relays, 4 mA outputs (galv. isolated), 4 digital inputs, 5 analog
inputs (1 of them galv. isolated with 2-w ire sensor supply), integrated 3-point step controller
with flush function, connecting options for one Radar sensors, type OFR

2.6 Installation of Spare Parts and Parts subject to wear and tear

We herewith particularly emphasize that replacement parts or accessories,
which are not supplied by us, are not certified by us, too. Hence, the installation
and/or the use of such products may possibly be detrimental to the device’s abil­ity to work or even lead to instrument failure.
Damages or measurement errors caused by the use of non-original parts and
non-original accessories are left at user’s risk. You can find spare parts or ac­cessories in chapter 14.

2.7 Device Versions

The OCM Pro CF measurement transmitter is available in different versions. The
type key below gives a brief overview on the various possibilities.
The transmitters vary in terms of the number of inputs and outputs, enclosure
construction, data transmission options, power supply and Ex protection. The
current type of device is indicated by the article number, which can be found on
a weatherproof label on the bottom of the enclosure.
From the type key below the type of device can be specified precisely.

Fig. 2-2 Type key for OCM Pro CF measurement transmitters

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3 Overview and Intended Use

3.1 Overview

OCM Pro CF

A Wall mount enclosure
B Panel mount enclosure
1 Slot with plugged Memory Card
2 USB interface (for service purposes only)
3 Keypad
4 Graphic display
5 Cable glands (only wall mount enclosure)
6 Terminal clamp housing with cover (only wall mount enclosure)

Fig. 3-1 Overview enclosure

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Flow velocity wedge sensor, type POA-V200/V2D0

Flow velocity wedge sensor, type CS2

Flow velocity pipe sensor, type CS2, with sensor screw joint and retaining element

Flow velocity pipe sensor, type POA, with sensor screw joint and retaining element

Flow velocity wedge sensor, type CSM-V1D0

Air-ultrasonic level sensor, type DSM

Electronic Box, type EBM

1 Flow velocity wedge sensor, type POA-V2H1/V2U1
2
3
4
5
6 Air-ultrasonic level sensor, type OCL-L1
7 Flow velocity wedge sensor, type CSM-V100
8
9
10
11 Flow velocity radar sensor, type OFR

Fig. 3-2 Overview sensors and electronic box

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Transmitter:

CAUTION

3.2 Intended Use

OCM Pro CF

Important Note

The device is exclusively intended to be used for purposes as described
below.

Modifying or using the devices for other purposes without the written consent
of the manufacturer will not be considered as use in accordance with the re­quirements.

Damages resulting from this are left at user’s risk.
The device is designed for a lifetime of approx. 10 years. After that period an

inspection in addition with a general overhaul must be carried out.

The measurement device type OCM Pro CF including the respective sensor
technology supplied by NIVUS is intended to be used for continuous flow meas­urement of slight to heavy polluted media in part filled and full channels, pipes or
similar. Here the allowed maximum values, as specified in chapter 0, must be
strictly kept. All cases which vary from these conditions and are not approved by
NIVUS GmbH in written form are left at owner’s risk.

Important Note

Install the device outside of Ex zones!
The Ex approval of the sensors is part of the „Technical Description for Corre-

lation Sensors“.

Ex-Identification

II (2)G [Ex ib Gb] IIB

Damages invalidate the Ex protection

Damage might invalidate the Ex protection.
The OCM Pro CF then is not allowed to be used in Ex area any longer.
Protect the OCM Pro CF from shocks, drops or other damage.

Note

The approval is only valid in connection with the respective indication on the
device nameplate.

The Ex-version of OCM Pro CF is matched to the NIVUS sensors regarding
the assessment of intrinsically safe electrical systems according to
EN 60079-25.

In case of using sensors from third party manufacturers the operator must
carry out a system review according to EN 60079-25!

The required specifications of the OCM Pro CF Ex version can be taken from
the EC-type examination certificate TÜV 00 ATEX 1572.

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Supply power

100 – 240 V AC, +10% /-15%, 47 to 63Hz
Max. consumption

AC: 31 VA / DC: 34 W

Typ. consumption

1x POA-V1U1 + 1x NMC0 + 1 relay energised,

Wall mount enclosure

Material: Polycarbonate

Panel mount enclosure

Material: Polycarbonate

Ex-Approval (optional)

II (2)G [Ex ib Gb] II B

Operating temperature

-20°C to +50°C [Ex: -20°C to +40°C]

Storage temperature

-30°C to +70°C

Max. humidity

80%, non-condensing

Display

Back-lit graphic display, 128 x 128 pixel

Operation

18 keys, dialog mode in German, English, French, Czech, Italian,

Inputs

1 x 4-20 mA for external level measurement (2-wire sensor)

Outputs

2 x (type S4) or 4 x (type M4) 0/4-20 mA, load 500 Ohm,

Data memory

1 MB internal data memory for programming and saving of readings

Storage cycle

1 to 60 minutes

Data transmission

Modbus TCP using integrated web server coupling via networks

4 Specifications

or 9- 36 V DC

230 V AC: (rounded) 14 W
1x POA-V1U1 + 1 relay energised, 230 V AC = (rounded) 14 W

-

- Weight: approx. 3400g

- Protection: IP 65

-

- Weight: approx. 2800 g

- Protection: IP 54 (front side), IP 20 (reverse side)

Spanish, Polish, Danish, Swedish

-

- 1 x RxTx-Bus for NIVUS air-ultrasonic sensor type OCL/DSM

- 1 x (type S4) or 4 x (type M4) 0/4-20 mA 12 bit resolution for external

level measurement, external control set points and external units data
storage, accuracy +/- 0.4 % of final value (20 mA)

- 4 digital inputs (t ype M4 onl y)

- 1 (type S4) or 2/3 (type M4) velocity sensors (POA, CS2 or electronic

box EBM + CSM) connectable

-

12 bit resolution, accuracy better than 0.1 %

- 2 x (type S4) or 5x (type M4) switchable relays, loadable up to 230 V

AC / 2 A (cos. φ 0.9), minimum switching load 10 mA

-

- optional plug-in Compact Flash Card up to 128 MB

-

(for panel mount enclosure
only)

- (LAN /WAN, Internet)

- Internet via Ethernet

- internal ISDN-, GPRS- or analog modem (optional)

Sensors (optional)

For the specifications on t he according sensors please see the a ppropriate instruction manuals or tech­nical descriptions.

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max. Temperature: + 70°C

5 Storing, Deliver y and Transport

5.1 Receipt

Check your delivery according to the delivery note for completeness and intact­ness immediately after receipt. Report any damage in transit to the carrier im­mediately. Send a written report to NIVUS GmbH Eppingen as well.
Report any delivery incompleteness in writing to your representative or directly
to NIVUS Eppingen within two week s

Mistakes cannot be rectified later!

5.2 Delivery

The standard delivery of the OCM Pro CF measurement system contains:

- the instruction manual with the certificate of conformity. Here, all necessary

steps to correctly install and to operate the transmitter are listed.

OCM Pro CF

5.3 Storing

5.4 Transport

- one OCM Pro CF transmitter, type S4, M4 or R4

- one pc. of evaluation software type NivuSoft 2.0 for Windows

Check any additional accessories by using the delivery note.

Maintain the storage conditions:

min. Temperature: - 30°C
max. humidity: 80 %, non-condensing

During the storage always protect the device from corrosive or organic solvent
vapours, radioactive radiation and strong electromagnetic radiation.

Protect the measurement system from shock and impact loads and vibrations.
The transportation must be carried out in the original packaging.

®

Vista, 7 or 8

5.5 Return

The units must be returned at customer cost to NIVUS Eppingen in the original
packaging free of charge.
Returns with insufficient pos tage will not be accepted!

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OCM Pro CF - Rev. 09 as of 07.06.2016 page 19

6 Functional Descripti on

6.1 General

The OCM Pro CF is a stationary measurement system for flow measurement
and storage of the detected measurement data. Type M4 additionally allows to
use a 3-step controller to drive a slide valve or similar flow control actuator. Fur­thermore up to 4 external measurement values can be stored. Wall mount en­closure units can be accessed remotely using the TCPIP protocol via Internet.
The device is designed to be used for measurements primarily in slight to heavy
polluted media with various compositions. It can be operated in part filled and full
channels and pipes with various shapes and dimensions.

Important Note

The method of flow velocity investigation is based on the ultrasound reflection
principle. Hence, it is indispensable for the system to work that there are
particles in the water, which are able to reflect the ultrasonic signal sent by the
sensor (dirt particles, gas bubbles or similar). Alternative the surface velocity
can be measured by using an OFR radar sensor. This sensor must not get in
contact with the medium.

The OCM Pro CF type S4 either uses a POA or a CS2 sensor which simultane­ously determines f low veloc it y and flo w level. Alternatively, a CSM sensor in
con-junction with the electronic box EBM may be connected, which however
merely is a flow velocity sensor.
Type M4 allows to connect up to 3 POA or CS2 sensors or type EBM electronic
boxes with type CSM sensors at the same time to accurately detect the flow ve­locity at one common measurement point.
In order to connect a type OFR surface radar the first sensor input can be used.
Use a transmitter type R4 for this kind of connection.

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h

v

sensor type POA/CS2

sensor type OCL

OCP/S4

AI external level
Sensor 4

Sensor 1

h

v

sensor type CSM

sensor type DSM

Sensor 2
Sensor 3

Electronic Box
type EBM

OCP/S4

AI external level
Sensor 4

Sensor 1
Sensor 2
Sensor 3

h

Sensor type OFR

OCP/S4 + R4

AI external level
Sensor 4

Sensor 1
Sensor 2
Sensor 3

Fig. 6-1 Possible combinations OCP type S4 / R4

Note

A maximum of one OFR surface radar can be connected.

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OCM Pro CF - Rev. 09 as of 07.06.2016 page 21

Mounting plate

Acoustic coupling layer

Temperature sensor

Level sensor (optional)

Elektronics

Pressure sensor (optional)

Duct for pressure measurement (optional)

1
2
3
4 Flow velocity sensor
5
6
7
8
9 Cable gland

Fig. 6-2 Possible combinations OCP type M4

Note

A maximum of one air-ultrasonic sensor type OCL or DSM (with EBM) may be
connected to a measurement system.

Fig. 6-3 Basic design POA wedge sensor

Instruction manual

page 22 OCM Pro CF - Rev. 09 as of 07.06.2016

®

Mounting plate

Acoustic coupling layer

Flow velocity sensor for positive flow direction

Pressure sensor (optional)

Duct for pressure measurement (optional)

Temperature sensors (sensors without pressure cell only)

Protective hose (optional)

Mounting plate

Acoustic coupling layer

Cable gland

Sensor cable

1
2
3
4 Water-ultrasonic level sensors (optional)
5 Electronics
6
7
8
9 Protective cover for sensor cable and protective hose fastening
10 Sensor cable
11

OCM Pro CF

Fig. 6-4 Basic design CS2 wedge sensor

1
2
3 Temperature sensor
4 Flow velocity sensor
5
6

Fig. 6-5 Basic design CSM wedge sensor V100

Instruction manual

OCM Pro CF

®

OCM Pro CF - Rev. 09 as of 07.06.2016 page 23

2 Sensor for level measurement (P-Series or i-series sensors)

3 Combi holder made of stainless steel (ZUB0OFRHAL)

2

•lt

c

hl=

h

= filling level

c

= sound transit time

t1

= time between transmit and receive signal

1 Sensor OFR

Fig. 6-6 Overview radar, level sensor and holder

6.2 Level measurement using water ultrasound

Depending on the selected sensor type, the water-ultrasonic combi sensor may
contain up to 2 different built-in level measurements: water-ultras onic and h y­drostatic level measurement. In this case type POA contains one sensor crystal;
type CS2 uses 2 sensor crystals with different dimensions.
The sensor type CSM does not have an optional level measurement available; it
is a pure flow velocity sensor.

The water-ultrasonic level measurement uses one or more horizontal sensor
crystal(s) utilising the ultrasonic transit time method. Here the period between
transmission and reception of a signal reflected from the water surface is meas­ured.

The sound travel time in water is 1480 m/s (4.85 fps) at 20 °C (68 °F).
The divergence depending on the temperature is 0.23 % per Kelvin.
To ensure a level measurement which is accurate to the millimetre, the medium
temperature is constantly investigated and the sound transit time is corrected re­spectively for calculation purposes. The fixed level, which is determined by the
sensor crystal position, is added to the determined value h1. This results in the
total level h.

Instruction manual

page 24 OCM Pro CF - Rev. 09 as of 07.06.2016

®

i-3

i-6

i-10

i-15

4 mA (empty) 0% span

20 mA (full) 100% span

6.3 Level Measurement using Pressure

Depending on the type of sensor used, the sensor may have an additional inte­grated hydrostatic level measurement available.
The piezoresistive pressure sensor used operates according to the relative
pressure principle, where the pressure of the standing water column above the
sensor is directly proportional to the fill level. Fluctuations of the atmospheric
pressure are compensated by using a small pipe integrated within the sensor
cable. This small pipe is exposed to the atmosphere.
This sensor enables to measure fill levels even if the combi sensor is installed
out of the channel bottom centre.
During initial start-up procedure the sensor is going to be calibrated by using a
manually investigated reference value. An additional height due to the sensor in­stallation position will be added as well .

6.4 Level Measurement using external Level Sensor

Depending on the kind of level measurement selected an external 4-20 mA sig­nal can be used for level input (e.g. by using an i-Series sensor).

OCM Pro CF

Note

The i-Series sensors feature pre-programmed measurement ranges. Please
refer to detailed information in the instruction manual for i-Series sensors.

i-Series sensors can be also operated without a HART modem.
In parameter „Value at 20 mA“ enter the measurement span of the sensor.

Depending on the sensor installation height it may be necessary to additionally
enter a negative offset.

distance to sensor face in m

distance to sensor face in m

Span (value at 20 mA) 2.875 5.7 9.7 14.5

Fig. 6-7 Measurement range of i-Series sensors

3.0 6.0 10.0 15.0

0.125 0.300 0.300 0.500

Instruction manual

OCM Pro CF

®

OCM Pro CF - Rev. 09 as of 07.06.2016 page 25

6.5 Flow Velocity Detect io n

The piezo crystal which has a slope towards the flow direction operates as a
flow velocity sensor. Here an ultrasonic burst with a defined angle is sent into
the medium. All the particles in the measurement path (air, dirt, suspended sol­ids) reflect a small amount of the ultrasonic signal. Depending on shape and size
of the particle a particular signal results. Hence, the multitude of the reflected
signals results in a reflection pattern (see Fig. 6-8). This pattern is going to be
received by the piezo crystal again, converted to electric signals and loaded into
a digital signal processor (DSP) which is built in the active sensor.

Fig. 6-8 Situation at first signal reception

After a certain period a second ultrasonic burst is sent into the medium. The
newly generated reflection signal is saved in the DSP too.

In various flow levels there are different flow velocities (flow velocity profile). De­pending on the level, the reflecting particles’ movement away from the first
measurement point therefore varies. Hence, a distorted reflection pattern results
(see Fig. 6-9). At the same time slightly different reflections occur: some parti­cles have been turning around and thus have another shape of reflection; some
particles are no longer within the measurement range and others have now
moved into the measurement range.

Fig. 6-9 Situation at second signal detection

The DSP checks both the received reflection patterns for similarities using the
cross correlation method. All existing signal differences are rejected so that two
similar but temporarily offset signal patterns are left for velocity evaluation.
Depending on the flow levels both patterns are subdivided into up to 16 mea­surement windows. Then, in each measurement window the lag ∆t of the signal
pattern is investigated (see Fig. 6-10).

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page 26 OCM Pro CF - Rev. 09 as of 07.06.2016

®

Fig. 6-10 Echo signal images and evaluation

Based on the beam angle, the interval between both transmitted signals and the
lag of the signal pattern therefore in each single measurement window the flow
velocity can be determined.
Stringing the single flow velocities together mathematically results in the flow
profile of the acoustic path which then is indicated on the OCM Pro display and
can be read there for inspection and control purposes.

Fig. 6-11 Investigated flow profile

If there are appropriate banking distances on the measurement place available,
based on the known channel geometry and the velocity distribution a
3-dimensional flow distribution can be rendered (see Fig. 6-12) (> finite ele­ment< principle.

Instruction manual

OCM Pro CF

®

OCM Pro CF - Rev. 09 as of 07.06.2016 page 27

Fig. 6-12 Computed 3-dimensional flow profile

From this flow velocity distribution and the channel shape, the channel dimen­sions and the filling level the flow volume is calculated and displayed. This vol­ume can either be a free programmable analog signal or an impulse signal as
well.

6.6 Flow velocity via Surface Radar OFR

The OFR surface radar OFR is aligned as to face towards the flow direction. Ini­tially emitting radar waves, the instrument then receives the waves reflected
from the water surface. From the difference between transmitted and received
frequencies it is possible to compute the velocity of the movement (Radar­Doppler-Effect).
By using complex integrated algorithms the transmitter now calculates the fol­lowing values from the determined velocity of the water surface:

- The flow profile

- The average velocity of the wetted geometry

Fig. 6-13 Measurement using the surface radar

Instruction manual

page 28 OCM Pro CF - Rev. 09 as of 07.06.2016

®

7 Installation and Connection

7.1 Installation Instructions

- Observe appropriate installation!

- Follow applicable legal or operational guidelines!

- Inappropriate use may result in injuries and/or damage on instruments!

The unit’s mounting place must be selected according to certain criteria.
Strictly avoid :

- direct sunlight (use weatherproof cover if necessary, e.g. NIVUS Art. No.

ZMS01800)

- objects radiating strong heat

- permissible ambient temperature: -20° C to +40° C

- objects with strong electromagnetic fields (frequency converters, high volt-

age power lines or similar)

- corrosive chemicals or gases

OCM Pro CF

- mechanic shocks

- vibrations

- radioactive radiation

- direct installation close to footpaths or travel ways

7.1.1 Fastening Wall Mount Enclosure

For fastening the wall mount enclosure, depending on place of mounting, use
4 machine screws size M5 with suitable length as well as the necessary nuts
and shims. Or use 4 wood screws, min. diameter 4.5 mm (0.1772 in). These
screws must penetrate min. 40 mm (1.575 in) into the wall or min. 50 mm
(1.97 in) into appropriate d o wels.

The clear view door as well as the display of the measurement transmitter are
covered with a protection foil for protection during transport and from scratches
during assembly. This protection foil must be removed immediately after the as­sembly!

Note

If the view door and display protection foil have been exposed to direct solar
radiation for a long period, they cannot be removed easily.

This problem may be solved by using methylated spirit or car polish if required to
clean the clear view door or the display. If these measures should not be suc­cessful, clear view door as well as display can be replaced by NIVUS (subject to
costs).

Instruction manual

OCM Pro CF

®

OCM Pro CF - Rev. 09 as of 07.06.2016 page 29

CAUTION

7.1.2 Wall Mount Enclosure Dimensions

Fig. 7-1 Wall mount enclosure

Hints to avoid electrostatic discharge (ESD)

ESD Risks:

Maintenance procedures which do not require power supply of the instrument
shall not be executed before the unit has been disconnected from mains pow­er in order to minimise danger and ESD risks.

Disconnect the iXT from mains power!

The sensitive electronic components inside the unit may get damaged by static
electricity. This may impair the instrument’s performance or even lead to instru­ment failure.

The manufacturer recommends the following steps to prevent the device from
getting damaged due to electrostatic discharge:

- Discharge static electricity from your body before touching the instrument’s

electronic components.

- Avoid unnecessary movements to reduce the risk of building up static elec-

tricity

- Wear a properly grounded antistatic wrist strap to discharge your body and

to keep away static electricity.

Touch components which ar e sensiti v e to electr ost atic bui ld-up only in antistatic
working areas. Use antistatic floor coverings and working surfaces always if
possible

Instruction manual

page 30 OCM Pro CF - Rev. 09 as of 07.06.2016

®

CAUTION

7.2 Electrical Installat i on

For electric installation the local regulations in the respective countries
(e.g. VDE 0100 in Germany) must be referred to.

Before feeding the rated voltage the transmitter and sensor installation must be
correctly completed. The installation shall be carried out by qualified personnel
only. Legal standards, provisions and technical regulations need to be observed.

Secure your plant sections

The OCM Pro CF power supply must be separately protected by a 6 A slow-

7.2.1 Connection of Transmitter in Wa ll Mount Enclosure

blow fuse and has to be isolated from other facility parts (separate turn-off,
e.g. by using an automatic cut-out with >B< characteristics).

Before feeding the rated voltage the transmitter and sensor installation must be
correctly completed. Check the installation for correctness.
Observe that installation shall be carried out exclusively by expert personnel.
Take further statutory standards, regulations and technical rulings into account.

All outer circuits, wires and lines connected to the device must have a minimum
isolation resistance of 250 V. If the voltage exceeds 42 V DC an isolation re­sistance with 500 kOhm min. will be required.
The cross-sectional dimension of the power supply wires must be 0.75 mm2
(0.03 in2) and must be in accordance to IEC 227 or IEC 245. The maximum al­lowed switching voltage on the relay contacts must not exceed 250 V and not
undershoot 10 mA.
According to Ex protection it must be checked if the devices power supplies
must be integrated into the facility’s emergency shutdown conception.

OCM Pro CF

General

- The OCM Pro transmitter is available in 3 different versions:

- st andard vers i on t ype >S4<

- Type >M4< with extended connections for up to 3 flow velocity sensors, digi-

tal inputs as well as additional analog inputs / outputs plus controller func­tion.

- Type >R4< featuring extended options to connect a Type OFR radar sensor.

All three models have the same clamp terminal marking. The transmitters M4
and R4 merely have additional connecting options which have not been
equipped in type S4.

Important Note

The terminal clamp wiring of wall mount and panel mount enclosure signifi­cantly vary from each other. The wiring diagram of the wall mount enclosure
cannot be used for the wiring of a panel mount enclosure! The same applies in
reverse.

Instruction manual

OCM Pro CF

®

OCM Pro CF - Rev. 09 as of 07.06.2016 page 31

The wall mount enclosure has cable glands and dummy plugs. Some of them
are screwed in or are enclosed as spare parts or additional parts. Number and
size of cable glands and dummy plugs depend on the type of transmitter.

Transmitter type S4:

2 glands M20 x 1.5
1 gland M16 x 1.5
2 dummy plugs M20 x 1.5
2 dummy plugs M16 x 1.5

Transmitter type M4:

2 glands M20 x 1.5
3 glands M16 x 1.5
2 dummy plugs M20 x 1.5
2 dummy plugs M16 x 1.5

Transmitter type R4:

2 glands M20 x 1,5
3 glands M16 x 1,5
2 dummy plugs M20 x 1,5
2 dummy plugs M16 x 1,5

With the supplied glands the following outer cable cross-sections can be con­nected reliably:

M16 x 1.5: 3.5 mm – 10.5 mm (0.138 – 0.413 in)
M20 x 1.5: 6.0 mm – 14.0 mm (0.236 – 0.591 in)

To be able to use cable diameters outside of the tolerance, glands must be used
which ensure IP65 minimum protection.
Unused lead-ins have to be locked tightly with an appropriate dummy plug be­fore the initial start-up.

The transmitter is equipped with terminal clamps which ensure reliable connec­tion of single and multi-wired cables with cross-sectional areas of 0.18-2.5 mm²
(0.007 – 0.098 in) in order to connect power supply as well as digital / analog
outputs and inputs.
The sensors (flow velocity, combi, air-ultrasonic or 2-wire level sensors) are
equipped with connection plugs due to better handling of the wall mount enclo­sure. The pre-configured cable tips of the NIVUS sensors or single and multi­wired cables with cross-sectional areas of 0.18-2.5 mm² (0.007-0.098 in) can be
connected to these plugs.
The 7-pole plug-and-socket connections of the 3 flow velocity sensors can be
switched with each other. Switching between 7-pole and 9-pole plug rail
(9 poles = level sensors) is impossible due to mechanical configuration.

For terminal clamp connection it is necess ary to use a slotted screwdriver with a

3.0 mm or 3.5 mm (0.118-0.138 in) blade. In order to connect the sensors to the
terminal strips of the wall mount enclosure use a slotted screwdriver with a 2.0
mm or 2.5 mm (0.079-0.098 in) blade.

Instruction manual

OCM Pro CF

page 32 OCM Pro CF - Rev. 09 as of 07.06.2016

®

The terminal clamps are normally unscrewed on delivery. Nevertheless this must
be checked before connecting the power supply or the signal wires.

Note

While connecting, it is helpful to exert slight pressure on the terminal clamp
screw.

This ensures safe cable connection by opening the clamp.

Important Note

Close the terminal clamp compartment of the wall mount enclosure by using
the accompanying cover and both screws. Closing prevents water or dirt from
leaking in.

Observe to not reverse the cover during installation (steeply bevelled side up).
The specified protection degree cannot be guaranteed if the cover is not in­stalled correctly.

Instruction manual

OCM Pro CF

®

OCM Pro CF - Rev. 09 as of 07.06.2016 page 33

GND potentials insulated from each other:
Internal wiring: b2 + b15; b3 + a14

DI1, DI2, DC-, AI1, AI2, AI3, AI4, AO1, AO2, AO3, AO4

Fig. 7-2 Wiring diagram wall mou nt enclosure OCM Pro CF

Instruction manual

page 34 OCM Pro CF - Rev. 09 as of 07.06.2016

®

7.2.2 Sensor connection - Wall mount enclosure

The sensor cable has to be connected to the transmitter at the terminal block.
The diagram below applies in case of connecting a flow velocity or water­ultrasonic combi sensor:

Fig. 7-3 Connecting a flow velocity or water-ultrasonic combi sensor

on the OCM Pro type S4W0 / M4W0

OCM Pro CF

Fig. 7-4 Connecting a second velocity sensor to the OCM Pro type

M4W0

Fig. 7-5 Connecting a third velocity sensor to the OCM Pro type M4W0

Instruction manual

OCM Pro CF

®

OCM Pro CF - Rev. 09 as of 07.06.2016 page 35

Fig. 7-6 Connection electronic box Type EBM with water-ultrasonic

sensor Type CSM and air-ultrasonic sensor Type DSM to Type
S4W0 / M4W0

Fig. 7-7 Connection 2, ele ctronic box Type EBM with water-ultrasonic

sensor Type CSM to Type M4W0

Fig. 7-8 Connection 3, ele ctronic box Type EBM with water-ultrasonic

sensor Type CSM to Type M4W0

Instruction manual

OCM Pro CF

page 36 OCM Pro CF - Rev. 09 as of 07.06.2016

®

Fig. 7-9 Connecting a flow velocity sensor with integrated pressure

measurement cell to type W0

Fig. 7-10 Connecting an OFR flow velocity sensor to Type R4W0

Note

The pressure compensation element serves as connection socket for cable
extension at the same time. Please observe not to exceed the maximum cable
length of 135 m (443 ft.) in Ex areas and 250 m (750 ft.) in Non-Ex areas be­tween sensor and transmitter by taking the maximum permissible resistance
into account.

Fig. 7-11 Connecting the air-ultrasonic sensor type LUS to type

M4W0 / S4W0

Instruction manual

OCM Pro CF

®

OCM Pro CF - Rev. 09 as of 07.06.2016 page 37

CAUTION

If the level measurement is carried out by a 2-wire probe (NivuBar, NivuCompact
2-wire echo sounder or similar) which is supplied by the OCM Pro, please follow
the wiring diagram below:

Fig. 7-12 Connecting a 2-wire sensor (EX for level measurement)

Do not connect cables without shields

If using sensors in Ex areas DO NOT lay the sensor cable past the mech anica l
shield between the terminal blocks.

Otherwise Ex protection is not guaranteed anymore.

Note

Use only the 3 cable connections located directly below the sockets! If using
an i-Series (Ex) sensor do not connect the sensor to the Ex clamps. i-Sensors
shall be connected to non-Ex clamps.

Fig. 7-13 Connecting a 2-wire sensor for level measurement to type W0

If the mA signal for level measurement is provided from an external transmitter
(such as NivuMaster) connect to clamps as follows:

Instruction manual

page 38 OCM Pro CF - Rev. 09 as of 07.06.2016

®

Fig. 7-14 Connecting external level measurement from NivuMaster to

type W0

7.2.3 Wall Mount Enclosure Overvoltage Protection

For effective protection of the OCM Pro transmitter it is necessary to protect
power supply as well as mA-output using overvoltage protection devices.
NIVUS recommends surge arrestors types EnerPro 220Tr, EnerPro 24Tr
(for 24 V DC) for the mains supply, as well type DataPro 2x1 24/24Tr for
mA-outputs.
The flow velocity sensor as well as the air-ultrasonic sensor type OCL are inter­nally protected against overvoltage. If higher voltages are expected to occur they
can be protected by combining the types DataPro 2x1 12/12-11μH-Tr (N) as well
as SonicPro 3x1 24 V/24 V

OCM Pro CF

Important Note

If using the sensors in Ex areas consider the connected loads of the overvolt­age protection devices as well as capacity and inductance of the NIVUS sen­sor cables (POA, CS2, OCL, EBM) additionally!

The maximum permissible NIVU S cab le len gths in Ex areas are:

- single-side overvoltage protection: 135 m (443 ft.)

- double-side overvoltage protection: 120 m (394 ft.)

Note

The use of overvoltage protection elements for sensors in Non-Ex areas will
reduce the maximum possible cable length.
The line resistance is 0.3 Ohm/wire. This resistance must be taken into ac­count considering the allowed total resistance (see "Technical Instructions for
Correlation Sensors" for details)

Note

Observe the non-reversed connection (p-side to transmitter) as well as a cor­rect, straight wiring supply.
Ground (earth) must lead to the unprotected side.

The overvoltage protection devices are ineffective if wired incorrectly!

Instruction manual

OCM Pro CF

®

OCM Pro CF - Rev. 09 as of 07.06.2016 page 39

Fig. 7-15 Wall mount enclosure - connecting the overvoltage protection

for power supply and analog inputs and outputs

Instruction manual

OCM Pro CF

page 40 OCM Pro CF - Rev. 09 as of 07.06.2016

®

Fig. 7-16 Overvoltage protection water-ultrasonic sensor or electronic

box, wall mount enclosure

Fig. 7-17 Overvoltage protection air-ultrasonic sensor, type OCL, wall

mount enclosure

Instruction manual

OCM Pro CF

®

OCM Pro CF - Rev. 09 as of 07.06.2016 page 41

7.3 Connection of the panel mount enclosure

7.3.1 Fastening the panel mount encl osur e

First the panel must be cut out accordingly (see Fig. 7-18). Then, after the en­closure has been inserted, tighten the 4 clamps integrated in the sides of the en­closure for fastening.
The panel mount enclosure can be fastened by using the 4 built-in clamps

7.3.2 Panel Mount Enclosure Dimensions

Fig. 7-18 Panel mount enclosure

7.3.3 Panel Mount Enclosure Transmitter Connection

General
Prior to connection please see the instructions in Chap. 7.3.

The transmitter is equipped with terminal clamps which ensure reliable connec­tion of single-wired and multi-wired cables featuring cross-sectional areas of

0.18–2.5 mm² in order to connect power supply as well as digital / analog out­puts and inputs.
For terminal clamp connection it is necess ary to use a slotted screwdriver with a

3.0 mm or 3.5 mm blade.

Note

While connecting, it is helpful to exert slight pressure on the terminal clamp
screw.

This ensures safe cable connection by opening the clamp.

Instruction manual

OCM Pro CF

page 42 OCM Pro CF - Rev. 09 as of 07.06.2016

®

b15

AI1

b16

AI

2

b17

GND AI 1/2

a15

AI3

a16

AI

4

a17

GND AI 3/4

b18

AO1

b

19

AO

2

b

20

G

ND AO 1/2

a18

AO

3

a19

A

O

4

a2

0

GN

D AO 3/4

b12

DI1

b13

D

I

2

b14

GND DI 1/2

a

1

2

D

I

3

a13

DI

4

a

1

4

G

ND DI 3/4

M

ode

m

b9

b10

a9

a10

a

11

c9

c10

c11

b2+

b

3

GN

D

a3

PE

a2

N

a1L

1

a4Ö

b

4

C

OM

c4Sa5

Ö

b5

COM

c5Sa6Ö

b6

CO

M

c6Sa7

Ö

b7

COM

c

7

S

a8

Ö

b

8

C

O

M

c8S

a2

1

GND E

x

b21

AI5

c21

+Ex

c28

c

29

c27c26c25

c24

c23c2

2

b29b

28

b2

7

b2

6

b25

b24

b2

3b22

100 - 240 V

47. ..63 H z

RxT

x-

Rx

Tx+

GND Ex

US+

RxT

x-

Rx

Tx+

GND Ex

US+

9 - 36 V DC

power supply

ON

OFF

ON

OF

F

ser i al interface

relay 1 relay 2 relay 3 r el ay 4 relay 5

Ex-area

input ext er nal
lev el measurement

power

supply

air us

connection v-sensor 3

sh

iel

d

sh

iel

d

connection v-sensor 2

connection

v-sensor 1

ultrasonic level

sensor (air us)

s

hie

ld

a29

a28

a27

a26

a25

a24

a23

a22

Rx

Tx-

RxTx+

GND Ex

US+

Fig. 7-19 Wiring diagram OCM Pro CF panel mount enclosure

Instruction manual

OCM Pro CF

®

OCM Pro CF - Rev. 09 as of 07.06.2016 page 43

OCM Pro (R4)

black (shield, no earth)
red 10 V
blue
white
green

Radar

+ 1 • 2 • 0,34 mm²

max. 150 m

LIYC 11Y 2 • 1,5 mm²

a22
a25
a26
a27
a29

outer shield

supply

RxTx -

+

UE-GND

RxTx +

7.3.4 Panel mount enclosure sensor connection

Sensor cables are connected to panel mount enclosures on the reverse side of
the transmitter. Follow the wiring diagram below to connect a flow velocity or wa­ter-ultrasonic combi sensor:

Fig. 7-20 Connecting a flow velocity or water-ultrasonic combi sensor to

the OCM Pro CF, type S4F0 / M4F0

Fig. 7-21 Connecting an OFR flow velocity sensor to Type R4F0

Fig. 7-22 Connecting a second flow velocity sensor to type M4F0

Instruction manual

OCM Pro CF

page 44 OCM Pro CF - Rev. 09 as of 07.06.2016

®

Fig. 7-23 Connecting a third flow velocity sens or to type M4F0

Fig. 7-24 Connection electronic box Type EBM with water-ultrasonic

sensor Type CSM and air-ultrasonic sensor Type DSM to Type
S4F0 / M4F0

Fig. 7-25 Connection 2, electronic box Type EBM with water-ultrasonic

sensor Type CSM to Type M4F0

Instruction manual

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®

OCM Pro CF - Rev. 09 as of 07.06.2016 page 45

Fig. 7-26 Connection 3, electronic box Type EBM with water-ultrasonic

sensor Type CSM to Type M4F0

Fig. 7-27 Connecting a flow velocity sensor with integrated pressure

measurement cell to type F0

Note

The pressure compensation element serves as connection socket for cable
extension at the same time.
Please note that the maximum cable length between sensor and transmitter
(considering the maximum permissible line resistance) shall not exceed 135 m
in Ex areas. The maximum cable length in non-Ex areas is 250 m.

Fig. 7-28 Connecting an air-ultrasonic sensor type OCL to type F0

If the level measurement is carried out by a 2-wire probe (NivuBar, NivuCompact
2-wire echo sounder or similar) which is supplied by the OCM Pro, please follow
the wiring diagram below:

Instruction manual

OCM Pro CF

page 46 OCM Pro CF - Rev. 09 as of 07.06.2016

®

CAUTION

+

-

OCM Pro

24 V DC

+

-

I = 4 - 20 mA

+

-

Insert

wire bridge

A2Y 2 x 2 x 0,8 or similar,
max. 150m (492.15ft)

Ex !

2-wire sensor
(e.g. type NivuCompact)
or pressure probe
(e.g. NivuBar Plus)

no

b2
b3

b15
b17

AE 1

GND AE 1/2

Fig. 7-29 Connecting a 2-wire sensor EX for level measurement to type

F0

Do not connect cables without shields

If using sensors in Ex areas DO NOT lay the sensor cable past the mechani­cal shield between the terminal blocks.

Otherwise Ex protection is not guaranteed anymore.

Fig. 7-30 Connecting a 2-wire sensor for level measurement to type F0

If the mA signal for level measurement is provided from an external transmitter
(such as NivuMaster), connect to clamps as follows:

Fig. 7-31 Connecting external level measurement to type F0

Instruction manual

OCM Pro CF

®

OCM Pro CF - Rev. 09 as of 07.06.2016 page 47

7.3.5 Panel Mount Enclosure Overvoltage Protection

Fig. 7-32 Panel mount enclosure - connecting the overvoltage protec-

tion for power supply and analog inputs and outputs (panel
mount enclosure)

Instruction manual

OCM Pro CF

page 48 OCM Pro CF - Rev. 09 as of 07.06.2016

®

1p

2p

1

2

DataPro

2 x 1 12 V / 12 V

11µTr (N)

1.5 mm² min.

OCM Pro

red

blue

a22
a25
a26
a27
a29

outer shield

supply

RxTx -

+

UE-GND

RxTx +

1.5 mm² min.

white

green
black

1p

2p

1

2

SonicPro

3 x 1 24 V / 24 V

3p 3

water ultrasonic sensor

Radar

Fig. 7-33 Overvoltage protection water-ultrasonic sensor or electronic

box or OFR radar, panel mount enclosure

Fig. 7-34 Overvoltage protection air-ultrasonic sensor type OCL, panel

mount enclosure

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7.4 Power Supply Wall and Panel Mount Enclosure

Depending on the type of OCM Pro used the unit can be powered with 85­260 V AC (type: A4) or 8- 36 V DC (type: D4).
The two slide switches located above the terminals serve as additional ON or
OFF switches.

Wall mount enclosure

Fig. 7-35 Position of slide switch on the bus board

Important Note

A transmitter with 9-36 V DC cannot be operated with alternating current, just
as it is impossible to operate a 230 V AC transmitter with 9-36 V direct current.

When operated with alternating current, the direct current supply clamps b2 and
b3 both provide a voltage of 24 V and a maximum capacity of 100 mA (turn on
24 V switch!).

Please note, when using this supply voltage (e.g. for digital inputs with control
signals), it must not be shielded through the complete switchgear in order to
maintain disturbing interferences on a low level.

Panel mount enclosre

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Fig. 7-36 AC model power supply

Fig. 7-37 DC model power supply

7.5 Regulator Mode

7.5.1 General

An OCM Pro Type >M4< is required as soon as the transmitter itself shall be
used to control the flow rate.
Type >M4< has he following features:

- 1 exter na l set po int input

- 2 digital outputs to drive the regulator slide valve

- 2 digital inputs for the slide valve monitoring

If you operate an OCM Pro CF, type S4 for flow rate control please use a suffi­cient external controller and program it according to manufacturer specifications.

Note

Knowledge in control technology is necessarily required in order to correctly
and reliably set the controller!

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Use sluice gate valves, knife gate valves or iris gate valves with electric-drive
three-step controller as control elements.
Analog-drive slide valves cannot be used.
We recommend the following regulating times (time elapsed between valve
completely open and completely closed) for the selection of gate valves:
</= 300 mm (11.8 in) diameter: min. 60 seconds
</= 500 mm (19,7 in) diameter: min. 120 seconds
</= 800 mm (31.5 in) diameter: min. 240 seconds
</= 1000 mm (39.4 in) diameter: min. 300 seconds

For the correct driving as well as for error monitoring of the slide valve, the Way­End-Switches “OFF“ and “ON“ as well as the torque switches “ON“ are a manda­tory requirement. These signals have to be connected to the digital inputs of the
OCM Pro CF. Please note to select gold-plated contacts in order to ensure con­tact reliability. Connect a signal relay between switches and OCM Pro CF digital
input to safely conduct the 10 mA input current.
Analog position feedback to OCM Pro CF is not planned.
The OCM Pro CF operates as a three-step controller with surge detection, quick
close control, slide valve monitoring and automatic flush function.
To drive the regulating unit, the digital inputs 4 and 5 are assigned as default.
Hence, digital output 4 as “slide valve closed“ and digital output 5 as “slide valve
open“ are defined.
Analog input 4 is determined for input of external setpoint values (see chapter

7.3.5)

Note

- The assignment of the digital outputs to the regulator cannot be modified.

- The input current on the digital inputs of the OCM Pro CF is 10 mA. Please

ensure contact reliability by selecting sufficient contact materials on the end
switch of the control slide valve.

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7.5.2 Construction of Measurement Section

For details on the construction measurement and control sections please refer to
the "Installation Instruction for Correlation and Doppler sensors”.

OCM Pro CF

Fig. 7-38 Setup of a controlled system suc h as a discharge control

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7.5.3 Regulator Mode Wiring Diagram

7.5.4 Control Algorithm

Fig. 7-39 Regulator mode wiring diagram

Note
Always use all 3 messages for slide valve control via digital inputs.

Activating one message only may result in disturbed regulator operation.

If the regulator function is selected (see also chapter 9.5.8) relay 4 is going to
self-activate for the function “SLIDE VALVE CLOSED“ and relay 5 for “SLIDE
VALVE OPEN“. This assignment cannot be modified.
The digital inputs are free programmable for position feedback. To ensure cor­rect and failsafe slide valve drive necessarily use the messages "PATH OFF“,
"PATH ON“ and "TORQUE OFF“ of the slide valve drive.
The input current per digital input is 10 mA.

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The regulator can alternatively be operated with external or internal set point.
External setpoints to be used always have to be routed to analog input 4.
In case of using a 4-20 mA signal as external setpoint, this signal can be moni­tored for cable breaks and short circuits. If errors should occur the OCM Pro is
going to access the internal setpoint (à in case of using external 4-20 mA set­points and error monitoring always set the internal setpoint additionally!).

The following equation applies for the internal calculation of the slide valve con­trol time:

control time = (setpoint – flow

7.6 Communication

7.6.1 General

Note

actual value

OCM Pro CF

max. slide valve runtime

) • P_factor •

max. flow

Communication can be used only in conjunction with the wall mount enclosure
unit!

Programming can be executed with the panel mount enclosure unit as well;
the transmitter however is not equipped with an Ethernet interface!

The OCM Pro CF wall mount enclosure unit allows remote access via Internet.
This means that the unit can be operated via Internet connection and PC or Lap­top keyboard as if being on-site.
Requirements:

- Intranet or TCP/IP network or:

- Internet access

- current Internet Explorer or Firefox (no Opera or similar)

- Java

There is no need to install any additional software if there is the latest Internet
browser and the latest Java plug-in available on your network PC/Laptop.
If you wish to access the unit via the NIVUS Internet portal it is necessary to
have a permanent Internet connection established (modem or DSL). Once hav­ing programmed the OCM Pro CF and setting up data transmission the unit can
be accessed from any PC in the world!

®

Note

Do not confuse OCM Pro CF remote access and process conducting systems.
The OCM Pro CF requires direct dialog with the user via PC. There is no real­time access. It is not possible to carry out automatic data transmission.

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Depending on the user’s status the following functions are either accessible or
locked:

Viewer

- operational conditions, progress lines, sensor status etc. can be selected

and viewed

- saved data and parameter files can be downloaded

- settings can be selected but cannot be modified permanently

- data files cannot be deleted

- no updates possible

Operator

- operational conditions, progress lines, sensor status etc. can be selected

and viewed

- saved data and parameter files can be downloaded

- device settings can be modified permanently

- data files can be deleted

- memory card can be formatted

- device updates possible

Administrator

All rights see operator level. Additionally:

- setting up new units

- administration of unit levels, sub-users and operating levels

Depending on the type of transmitter (see Chapter 2.5) there are various ways
for data communication. Select from:

- Ethernet

- Analog modem

- ISDN modem

- GSM/GPRS modem

Important Note

Using remote access options is associated with connection costs on the part
of the instrument as well as on the part of the operator/viewer. These costs
depend on:

- Providers choice

- Connection time

- Connection period

- Flat rate or similar arrangement

They are not influenced by NIVUS.
The system administrator is responsible for the amount of future communica-

tion expenses arising.

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7.6.2 Communication Options

There are several different options available for communication with the
OCM Pro CF. These options are:

- direct Ethernet connection between PC/Laptop and OCM Pro CF using a

- Ethernet level connection via TCP/IP, network connection via Ethernet hub

- Connection via network server using DHCP (Dynamic Host Configuration

- Internet connection via access portal (see Fig. 7-42)

- connection to SCADA systems via Modbus TCP (Ethernet)

- data and alarm transmission via E-mail or FTP server

OCM Pro CF

cross-link cable

or switch (see Fig. 7-40) It is necessary to use patch cables.

Protocol) and/or DNS (Domain Name Server).
This setup is depicted in Fig. 7-41.

It is required to use an OCM Pro CF equipped with according hardware such
as analog modem, ISDN modem or GPRS to set up such a connection.
The setup is described in Chapter 7.6.3.

Fig. 7-40 Communication without server

Fig. 7-41 Communication with server

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1. Select your unit on >www.nivus.com< using the access portal.

2. The portal will “wake up” the unit sending a direct call.

3. The OCM Pro CF is setting up Internet access logging in to the portal
subsequently.

4. The portal is going to establish a connection between unit and user using
the internal OCM Pro CF web server

Fig. 7-42 Communication via Inter net

7.6.3 Communication Setup via Access Portal

Important Note

Setting up an Internet communication for one or several NIVUS flow mea­surement units requires an initial setup by NIVUS or a company authorised by
NIVUS.

Important Note

Setting up a modem connection (analog, ISDN, GPRS or similar) will cause
communication expenses depending on the connection chosen. Please ob­serve while transmitting data.

After the initial setup has been finished successfully following units, which are
equipped with the same transmission system, can be set up by the customer or
the customer’s system administrator.
A "Start portal" is required to start Internet connection.

This start portal is available under http://www.domoport.de/
To start communication, enter the address mentioned bef ore int o your bro wser’s
address line.
This will take you to the homepage of the provider (Domoport).
Enter your "Username" and "Password".
You are going to receive both codes after the initial setup has been carried out
by NIVUS. You can modify the names and passwords yourself.

.

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Fig. 7-43 Starting the communication

Important Note

Do not forward user names and passwords to unauthorised persons!
Keep user names and passwords separated from each other and in a way

which avoids misuse.

The data is transferred using SSL encryption, making it inaccessible to third par­ties. After entering the valid user name and password a selection page will ap­pear. This page indicates any measurement place registered for this user. The
measurement places can be selected directly from here.

Fig. 7-44 Measurement place selection

After selecting the desired measurement place and clicking the "Connect" but­ton communication with the selected OCM Pro CF will be established. User
name and password are going to be verified again and the homepage contained
in the OCM Pro CF will be transmitted.
This may take between 15 and 120 seconds depending on modem type and
quality of connection.

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7.6.4 Data Transmission

Fig. 7-45 Connecting

After connection has been established successfully, first of all a static page with
current measurement values (flow, fill level and flow velocity) will be indicated on
the right-hand side of the screen. These numeric values can be refreshed auto­matically in intervals of 2, 5 or 10 seconds by clicking the according field below
and setting the cycle time subsequently.

Fig. 7-46 Static communication page

Clicking the >Remote Control< button on the left-hand side of the screen will ini-

TM

tially start a Java
If the Java

TM

by clicking the Java
open up a direct link to Java

applet.

software is not installed on the PC, it can be downloaded for free

TM

button (next to the word >Remote Control<) which will

TM

.

Note

TM

Remote control is not possible if the free Java
installed on the operator PC!

runtime environment is not

The Java© Applet is third party software and NIVUS therefore cannot accept
any liability of the use of it.

Download and installation of programs or software may damage your comput­er and is therefore completely left at user’s risk!

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Fig. 7-47 JavaTM-Applet starting

After starting Java
the same manner as if being on-site.
The OCM Pro can now be operated by using the PC keyboard (arrow keys
>left<, >right<, >up<, >down< and >Enter<, >ESC< and >ALT<) exactly the
same way as if using the keys on the unit front board.
It is possible to operate the virtual keys on the screen by clicking with the mouse
as well.
Please observe the delay occurring due to the kind of transmission (à no quick
consecutive control entries, but always one movement at a time after the previ­ous command has been executed visibly).

TM

successfully, the OCM Pro CF display now is indicated in

Fig. 7-48 Visualisation of onlin e connection

By clicking the control element >File Download< underneath the >Remote Con­trol< button it is possible to directly download data from the plugged memory
card. Information on the card will NOT be deleted automatically which ensures
data to be available on later downloads. After double-clicking the desired file can
be either opened directly or downloaded in uncompressed original format or as
compressed gzip-file.
The .gz-files can be unpacked for further use with WinZip.

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2 ZIP-file area

3 Delete area (to be moved into backup folder)

The file size will be reduced by approx. 75% by using the .gz-format and hence
is recommended particularly if large measurement place files have to be trans­mitted via analog modem and GPRS (saves money and time).
You can find more information on the OCM Pro file structure and how to use the
single files in chapter 9.5.11.

Note

It is not possible to transfer data files if the memory card is not plugged and
storage is disabled!

1 Uncompressed downloadable files in original format

Fig. 7-49 Selecting the file to transmit or to delete

Fig. 7-50 Saving transmitted files on PC

The selected file can be deleted by double-clicking on it in area 3 (see Fig.
7-49). In order to be able to read or to transmit the file later, this action will move
the file into a backup folder which has been created automatically.

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Fig. 7-51 Created backup folder

Files which have been moved into the back up folder w ill be del eted irre vocab ly
from the OCM Pro CF memory card if clicked again for deleting.

Fig. 7-52 Contents of created backup folder

Fig. 7-53 Deleting a file permanently

Note

Transmitting the measurement place file without deleting it or moving it into
the backup folder will cause to attach all future readings to the transmitted file.
This is going to blow up the size of the file as “old” data which have been
transmitted before are going to be trans mit ted aga in!

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2 Resolution

3 Update button

4 Scale of readings

5 Time axis

6 Scale grid

Note

Deleting a file (moving it into the backup folder) while having a file with the

The screen below comes up after clicking:

same name in the target folder will cause the older file to be overwritten with­out any additional warning!

A click on the >Trend< button on the left-hand side enables to indicate a trend
graph parallel to the trend screen indicated on the OCM Pro CF to visualise data
stored in the internal unit memory. The range of data to be indicated covers a
maximum of 90 days.

1 Display range

Fig. 7-54 Online trend graph

Flow volume, fill level, average flow velocity and medium temperature are going
to be indicated as coloured progress lines. The units here are equal to the units
indicated on the OCM Pro display (see Chap. 9.3).
The readings on the y-axis are going to be scaled according to a grid in steps of

0.1, 0.2, 0.5, 1, 2, 5, 10 ..... up to a maximum of 10000. Here the selected scale

unit is equal to a horizontal grid line (see Fig. 7-54, point 6).

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Set the start point for the trend graph to be indicated under point 1. The resolu­tion (scale of the time axis) can be set under point 2. Select here between
10 minutes, 1 hour, 6 hours or 24 hours/grid line. A click on the >Update< button
(point 3 in Fig. 7-54) will refresh the screen by the new measurement data which
have been collected whilst watching.

Note

If the selected start date/time of the trend is the current date/time or if the time
axis range allows to view a greater range than selected by start date/time and
resolution this will cause the screen to indicate older values than selected
additionally.

Log out the on-site unit by using the >Logout< button located on the left-hand
side of the screen as well. This will take you back to the NIVUS homepage.

Note

If no data transmission has been executed for 5 minutes, the OCM Pro CF will
automatically interrupt the connection in order to avoid unnecessary expens­es.

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8 Initial Start-Up

8.1 General

Notes to the user

Before you connect and operate the OCM Pro CF you should strictly follow the
notes below!
This instruction manual contains all necessary information to program and to
operate the device, addressing qualified technical staff who have appropriate
knowledge about measurement technology, automation technology, information
technology and waste water hydraul ic s.
To ensure a correct function of the OCM Pro CF this instruction manual must be
read thoroughly!
The OCM Pro CF must be wired in accor dance w it h the wiring di agram, see
chapter 7!
If any problems regarding installation, connection or programming should occur
please contact our hotline
[phone].

General Principles

The initial start-up is not allowed until the installation has been finished and
checked.
To exclude faulty programming this instruction manual must be read before the
initial start-up.
Please get familiar with the OCM Pro CF programming via display and keyboard
by reading the instruction manual before you begin to program the device.
After transmitter and sensors are connected (see chapters 7.2.3 and 7.3.3) the
parameters must be set. In the most cases all you need is:

- geometry of the measurement place and dimensions

- used sensors and positioning

- displ a y units

- span and function of analog and digital outputs

The OCM Pro CF user surface has been designed in a way which allows even
unfamiliar users to easily set up basic settings in graphic dialog mode ensuring
reliable device operation.
Either let the manufacturer or an expert company authorised by the manufactur­er do programming works as soon as the following requirements are prevailing:

- ext ensi ve progr am ming

- difficult hydraulic conditions

- special channel shapes

- lack of expert personnel

- if a setup and error protocol is required

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2 Numeric and alphabetic keys

3 Shift key

4 0 / - navigation key

5 Control key

6 Confirmation key (ENTER)

7 Escape key

8.2 Operator Panel

A comfortable 18-button keypad featuring partly multiple key assignment is
available to input data.

OCM Pro CF

1 Decimal place / Info key

Fig. 8-1 Operator panel

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2 Indicates activated service mode

3 Calibration menu

4 Display menu

5 Current system time (automatically alternates with medium temperature)

6 Fields indicating digital output conditions

7 Total

8 Filling level (height)

9 Flow velocit y

10 Flow rate

11 Operation menu

12 Parameter menu

13 Symbol indicati ng acti ve co m m unication

14 Status menu of inputs, outputs and sensors

8.3 Display

OCM Pro CF has a large back-lit graphic display with a resolution of 128 x 128
pixel. This ensures to comfortably read current values.

1 Indicates activated data storage

Fig. 8-2 Display

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RUN

Standard operation mode. Apart fr om indicating the names of

PAR

This menu is the most extensive of the OCM Pro CF. It is for the

I/O

This menu includes information about internal operation of the

CAL

Here it is possible to adjust height (depth) and flow velocity of analog

EXTRA

This sub-menu includes basic display settings: contrast, background

Five basic menus can be selected, visible in the headline of the display. They
can be selected individually. The menus are:

measurement places, time, flow rate, level and average flow velocity
optionally allows to indicate the flow velocity distribution. Additionally
it is possible to show day totals and error messages including time
stamps or to graphically indicate the history of flow volumes, filling
level and average flow veloci ty.

complete parameter setting of dimensions of the measurement
place, sensor selection, analog and digital inputs and outputs,
storage, data transmission and regulator function.

OCM Pro CF. All current values can be displayed, as well as the
values of analog and digital outputs and relays. Additionally, echoes
of the sensors and single velocities are displayed. It further allows to
determine the remaining capacity as well as the remaining memory
time on an optionally plugged memory card resulting from the cycle
time

outputs and to simulate analog as well as digital outputs. To detect
very low volumes occurring at minimum levels which do not allow to
reliably detecting the flow velocity, it is possible to set up an
automatic flow calculation based on the manning formula here.

lighting, language, units, system times and totalizer presets.

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These buttons are used for parameter setting and to enter digits. In

8.4 Operation Basics

The entire operation is menu driven and supported by explanatory graphics. To
navigate within the menu structure use the 4 control keys (see chapter 8.3).

-

Use these buttons to select main menus.

Buttons for scrolling within menus.

Selected submenus can be entered, inputs can be opened. The
“Enter“-key further serves to confirm data entries.

Escape submenus step by step. Cancels entered data.

some sub menus the buttons are to input letters (e.g. name of
measuring point). Function compares with mobile phone or cell
phone buttons: multiple quick pressing switches over to the next
letter. The cursor will jump to the next digit if no key is pressed for
approx.

The key “dot/i“ serves for entering digits. In RUN-Mode it also
recalls internal information on device, software version, MAC
address, serial no. of transmitter and connected NIVUS sensors.
Furthermore it restarts communication between transmitter, flow
velocity sensor and air-ultrasonic sensor.

2 seconds.

This button is to switch between uppercase and lowercase letters
in text entry mode. Further it is used to delete and to insert data. In
the rest of the parameter setting mode it enables/disables various
functions, as well as SHIFT-key between various programming
options.

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2718

If prompted enter this number into the OCM Pro.

9 Parameter Setting

9.1 Setting Basics

The transmitter in the background operates with the settings which have been
entered at the beginning of the parameter setting. Just after you finish the new
entries, the system asks to accept the new values.
If “yes”, it is needed to enter the PIN code.

Important Note

The PIN code protects against unauthorized access.
Never give the PIN code to any unauthorised persons. Even do not leave the

code next to the equipment or write it down on it.

If a faulty code has been entered three times the parameter mode will be abort­ed. The unit will proceed to operate using the values set earlier. If the correct
code has been entered the modified parameters are accepted and the system
resets. This reset will take approx. 20-30 seconds.

Besides having the option to save modified parameters or to reject any modifica­tion by pressing >No< at the end of the parameter setting procedure, it is possi­ble to jump back to the previous level using the >Back< function. This enables
the user to modify settings which might have been forgotten without the need to
buffer previously modified settings.

OCM Pro CF

Fig. 9-1 Screen at end of parameter setting

If parameter settings are not going to be modified but just verified by selecting
each parameter, there will be no request at the end of the dialog.
Modifications concerning language, units, contrast and display brightness do not
require the PIN code as these settings influence just the way of representation
and not measurement or the output of measurement values.

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Note

This instruction manual describes all programming options of the
OCM Pro CF. Depending on the device type various inputs and outputs as
well as communication and data transmission features may not be available.
They may be programmable, but may not be available to be used as outputs
or to be connected (see also Specifications in Chapter 0).
This applies for the transmitter type S4, which has only 2 analog outputs,
2 relay outputs, 1 analog input and no digital input. This device cannot be op­erated as a controller. It can be operated with 2 analog outputs and 2 relay
outputs only. Please use transmitter type M4 for the additional functions de­scribed above.

After mounting and installing sensor and transmitter (see previous chapters as
well as "Installation Instructions for Pipe and Wedge Sensors") activate the
power supply.
The initial start-up dialog is the language selection:

Fig. 9-2 Language selection

Select the desired language by using the arrow keys and press >Enter< to con­firm.

Please press key once

The transmitter begins communication with the sensor and coordinates both
processor programs. At the same time, the firmware version numbers of CPU
and sensor will be indicate d, which is nec ess ar ily required if problems during
programming should arise.
You will need to note this information. It is required as soon as questions on
programming should arise.

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2 Serial number OCM Pro CF

3 Transmitter firmware version with date of creation

4 CS2 sensor firmware version with date of creation

5 POA sensor 2 firmware version with date of creation

6 POA sensor 3 firmware version with date of creation

7 OCL sensor firmware version with date of creation

8 EBM electronic box firmware with date of creation

1 Sensor number

2 Firmware version with date of creation

3 Serial number

4 Sensor type

1 MAC address OCM Pro CF

Fig. 9-3 Info on firmware and version number

Pressing the "right" arrow key indicates additional information on the connected
and activated sensors:

Fig. 9-4 Additional sensor information

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Standard

Display (basic screen) with information about the name of measurement place,

Graphics

Indicates the velocity distribution in a vertical measurement path.

accordingly. The selected height as well as the current velocity can be read from

9.2 Operation Mode (RUN)

If older sensors are in use it may not possible to indicate the sensor information
completely.

Important Note

During the final inspection a system reset is performed and the OCM Pro CF
is shipped subsequently. The unit hence is reset to factory defaults. Inde­pendent from this, we recommend to execute one more system reset
(PAR/Settings/System reset) prior to programming parameters in order to
ensure a defined basic state.

Then parameters can be set.

This menu is a display menu for standard operation mode.
The following sub menus are available:

Fig. 9-5 Operation mode selection

time, flow quantity, level and average velocity.

Pressing the "arrow up“ or "arrow down“ keys will move the indicator line

the bottom line of the display (see Fig. 9-6).
This graphic indication enables to understand the current flow conditions at the
chosen measurement place. The velocity profile should be evenly distributed
and should not have any errors (see Fig. 9-7).
In case of very unfavourable conditions change the position of the flow velocity
sensor. For more details please refer to the "Installation Instruction for
Correlation and Doppler sensors".
Graphics are not availbale if a surface radar sensor is used.

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2 Maximum Measured Velocity

3 Measurement Window Indication

4 Level Measurement W indow no.

5 Level Value

6 Velocity Measurement Window no.

7 Velocity Value

very good profile, area

good profile, strongly

suitable profile
ill-suited profile

unsuitable profile

Day totals

The submenu >INFO< (see Fig. 9-8) allows to view the flow totals of the past 7

is value can be reset to >0< at

1 Maximum Height

Fig. 9-6 Flow velocity distribution

free of backwater

Fig. 9-7 Flow velocity profiles

Note

This function is not available as soon as an OFR radar sensor is connected.

tending to backwater

days (see Fig. 9-9), presumed the transmitter has been operated without any
interruption in the past seven days. Otherwise it shows the total for the
uninterrupted days of operation).
Totalisation normally is carried out at 00:00 h (midnight). If desired, this value can
be modified under RUN – Day Total s - Interval (see Fig. 9-10)
Additionally, you can get information about partial total value since the last reset
(comparable with rout mileage counters in cars). Th
any time by pressing the >ALT<-key. This reset does not influence the totaliser.

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2 Day total

Error Messages

This menu is to monitor any interruptions in the unit function. Errors are going to

Trend

Operates like an electronic writer. Average cycle values of level, average flow

Fig. 9-8 Info menu

1 Sub total

Fig. 9-9 Day val ues

Fig. 9-10 Time of daily totalising

be saved and ordered by type of error, date and time. Pressing the >ALT< key
will delete all error messages one by one (from the latest one back to the oldest
one).

Note

When deleting an error message at a time when the error still is due to be
dealt with, this error will NOT be written into the error memory again. The error
will be saved in the memory not before it has disappeared and arisen again (or
if the power supply has been interrupted briefly).

velocity and height (level) will be recorded for the past days. Values can be
individually selected and viewed in a submenu..

Fig. 9-11 Trend value selection (varying screens)

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2 Minimum value occurred

3 Graph

4 Period indicated

The period within which values have been averaged is indicated on the bottom
line of the graphic display. New values will be added as vertical lines on the
right-hand side each time after the programmed storage cycle has expired (see
Fig. 9-21). This is why the oldest value moves to the left-hand side of the display
and from there into the internal memory area.
By using the arrow keys >left< and >right< you can scroll within the time axis in
order to view older data sets. Browse through day values using the arrow keys
>up< and >down<. This enables to determine and to evaluate previous meas­urements, trends, dry weather periods as well as possible measurement prob­lems which have been occurred some days before.
The internal memory has a capacity of 90 days. Subsequently, saved data will
be overwritten erasing the oldest data sets first.
Indicated measurement values will be scaled automatically during scrolling and
therefore might change in order to ensure the best reading available.
The memory time interval can be set in the PAR - Me mory Mode - Interval
menu.

1 Maximum value occurred

Fig. 9-12 Trend graph example

Note

All trend graphic values saved previously will get lost if the memory interval or
any other parameter is going to be modified.

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Units

This menu contains the following sub menus:

Unit System

Here you can select between the metric system (litre, cubic meters, cm/s etc.),

Language

German, English, French, Czech, Italian, Spanish, Polish and Danish are

Display

9.3 Display Menu (EXTRA)

This menu allows to modify settings such as basic screen, units, language as
well as the display itself. The following submenus are available:

Fig. 9-13 Extra submenus

Fig. 9-14 Unit system selection

Fig. 9-15 Selection of individual units

- Flow

- Velocity

- Level

- Total

For each of these 4 measured values you can select a unit which appears on
the display. Depending on the unit system selected, there are various units
available.

English system (ft, in, gal/s, etc.) and American system (fps, mgd etc.).

available for communication and indication of messages on the Display.

allows to adjust display settings regarding contrast and brightness. Use and

to decrease; and to increase values. and modify values in 5

% steps, and in steps of 1 %.

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System Time

In order to perform various control and memory functions, the unit includes an

2 Week no.

3 Time

Set Total-Counter

This menu allows to newly set the totalizer indicated on the main screen. This

After the new value has been set confirm twice using the "Enter“ key and type in

Otherwise the new value will not

internal system clock saving dates of year, weekdays and week numbers. The
clock settings can be modified if required (different time zones, summer time /
winter time etc.).
First select the menu point >Info<:

Fig. 9-16 System time submenu

The current system time is indicated after the settings have been confirmed:

1 Date

Fig. 9-17 System time screen

This menu point is for indicating purposes only. Hence the system time cannot
be adjusted here. Modifications can be carried out in the individual menus “Date”
and "Time“.
The according week number will bet set automatically as soon as the date has
been set.

feature is normally going to performed in case of replacing a transmitter which
has to indicate the same value as before replacement.

the PIN “2718“ (up to 2 faulty entries possible).
be accepted.

Fig. 9-18 Totalizer modification

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9.4 Parameter Menu (PAR)

9.5 Parameter Menu (PAR)

Fig. 9-19 PIN request

This menu is the most extensive and most important regarding the OCM Pro CF
settings. It nevertheless is sufficient in most cases to set only some essential pa­rameters, which usually are:

- name of measurement place

- channel profile

- channel dimensions

- flow velocity measurement sensor type

- level measurement sensor type

- analog output (function, measurement range and measurement span)

- relay output (function and values)

All other functions are additions which are required in special cases only (special
channels, regulator mode, storage mode or for special hydraulic applications).
These settings are normally made with the help of our service personnel or by
an authorised expert company.
The parameter menu
which are described individ ual ly on the follo win g page s .

9.5.1 Parameter Menu "Measurement Place"

>PAR< includes twelve partially very extensive submenus

Fig. 9-20 Submenu measurement place

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Name (of

NIVUS recommends to coordinate and to define names according to names

After the submenu >Name of Measurement Place< has been selected the basic

2 menu

OCM Pro CF

This menu is one of the most important basic menus for parameter setting as the
measurement place is going to be defined here.
The menu cannot be indicated completely due to restricted display space. Simi­lar to many well-k nown PC app lications, this is readily identifiab le from the black
bars on the right-hand side of the screen.

Use "Up“ and "Down“ keys to scroll the menu.

measurement place)

stated in the respective construction documents. Names may contain up to 21
letters. Setting the name is quite similar to operating a mobile phone:

setting "nivus" will come up. Toggle between uppercase and lowercase letters
by using the >up< or >down< keys.
Pressing the "Alt“ key will either turn on or off a selection of special characters.
The special characters can be selected individually with the >left< or >right<
arrow keys, confirm your selection with “Enter”.

1 name of measurement place

Fig. 9-21 Setting the name of the measurement place

Enter the desired name with the keypad, where each key has assigned three let­ters and a number (see Chapter Fehler! Verweisquelle konnte nicht gefund-
en werden.). Select between these four characters by briefly pressing a key
several times.
The cursor will jump to the next character if a key has not been pressed for two
seconds.

Description of Keys:

Moves the cursor to the left-hand or the right-hand side.
Moving the cursor to the left-hand side will delete the character

left of the cursor.
Moving the cursor to the right-hand side creates a space

character.
Toggle between uppercase and lowercase letters.

Shift to uppercase letters.
Shift to lowercase letters.
Confirm the entered name with “Enter“ and exit the menu.

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Subdivide Geometry

This is a special parameter which enables to easily set parameters for large

Channel Profile(s)

If the profile has not been subdivided first select the zone (bottom, centre, top)

Pipe (radius)

special profiles with convex tops. This parameter will not be required for the
very most applications! Mainly, authorised NIVUS personnel is going to use this
function; which nevertheless will be described here briefly.
This parameter allows to subdivide special profiles with convex tops and
possibly with a bottom featuring a dry weather channel into 2 or 3 level / height
zones, which facilitates the programming of the total profile dimensions.
Pressing the >ALT< key will switch between the 3 options described below:

- NO (no profile subdivision, standard setting)

- 2 (subdivide in 2 level / height zones)

- 3 (subdivide in 3 level / height zones)

Fig. 9-22 Profile divided into 3 zones

with the >ALT< key and set the desired profile subsequently. You can select
between following standard profiles according to German ATV A110:
(see dimensions to enter in brackets)

-

- Egg, h:w = 1,5:1 (radius)

- Rectangle (channel height and channel width)

- U-Profile (channel height and radius)

- Trapezoid (channel height, trapeze width bottom/top, height)

- custom profile (spot heights and according channel widths)

- 2r Egg, h:w = 1:1 (radius)

- Q= f(h)

Fig. 9-23 Channel shape selection

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Channel Dimensions

Type in the respective channel dimensions depending on the profile chosen

Select channel shape with "Up“ and "Down“ keys.
Confirm selection with “Enter“.

The selected profile will be indicated in the programming mode screen

Fig. 9-24 Selected profile

If the existing profile does not comply with the options to select from, choose
>Custom shape< in such a case.

Confirm with“Enter“.

A request will come up subsequently asking for known relations.

Fig. 9-25 Custom shape menu

before.

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Fig. 9-26 Screens showing various channel dimensions

Note

Please observe indicated units when entering values!

Choosing >Custom shape< will indicate a table containing a maximum of 32
possible breakpoints on the display. As described above, enter the relations be­tween >height-width< or >height-area< (Fig. 9-25) and enter the according value
pairs.

Fig. 9-27 List of custom shape breakpoints

To define the zero point of the channel, star t b y enterin g 0 – 0 in break point 1.
All further breakpoints can be set freely regarding height as well as width/area.

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Bottom area:

Top area:

Custom profile

Bottom area:

Pipe

Centre area:

Custom profile

Top area:

Pipe

There may be different distances between individual level points. Furthermore it
is not necessary to use all of the 32 breakpoints possible.
The OCM Pro however is going to use a linearization function between the sin­gle breakpoints. Decrease the distance between breakpoints in case of heavy
and irregular changes in the channel dimensions.

Fig. 9-28 Custom profile breakpoints

If the channel profile has been divided in two zones, the channel profiles below
are available to be set:

- Pipe

- Egg

- Rectangle

- U-Profile

- Trapezoid

- 2r Egg

- Q=f(h)

-

Dividing in three zones will reveal the following setting options:

-

- Egg

- Rectangle

- U-Profile

- Trapezoid

- 2r Egg

- Q=f(h)

-

-

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Sludge level

The sludge level set is considered during calculation as non-moving sub-area

Low-flow volume Q

This parameter serves to suppress lowest movements or apparent volumes

Q

: measurement values lower than this one will be set to >0<. Only positive

V

: low-flow volumes in applications with large profiles and filling levels can be

Important Note

Programming subdivided profiles requires comprehensive knowledge and
experience in operating the OCM Pro.

To avoid faulty programming or if in doubt this procedure should be performed
by NIVUS service personnel or expert companies authorised by NIVUS.

on the channel bottom and will be subtracted from the wetted hydraulic total
area prior to performing flow calculation.

min

arising. Used mainly to measure overflow volumes in constructions which are
permanently flooded by receiving water.

min

values are allowed to be set. These values are going to be considered as
absolute values and therefor e have posi ti ve as well as negati ve ef f ect s.

min

suppressed by means of this parameter. Lowest velocity fluctuations within
longer periods of time may cause apparently large volume fluctuations which
cannot be gated by using the value of Q

min

.
Flow velocities below this value will be set to „0“ which will set the calculated
volume to „0“ as well.
Only positive values can be set. These values are going to be considered as
absolute values and therefor e aff ec t positive as well as negati ve velocities.

Both setting options of low-flow suppression have an

>OR< relation between

each other.

Fig. 9-29 Selection low-flow volumes

Note
The suppression of low-flow volumes is no offset but a limit value!

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9.5.2 Parameter Menu “Level “

Fig. 9-30 Menu level measurement

OCM Pro CF

Fig. 9-31 Level measurement – submenu

Important Note

The sensor type selection is decisive for the following programming proce­dure. An incorrect selection may lead to faulty measurements or even meas­urement failure.

This menu defines all parameters responsible for level measurement. Depend­ing on the sensor type selected the parameter start page as well as the parame­ters to enter may vary.
Basically determine sensor type or sensor combination first!
Move the cursor accordingly by using the >up< and >down< arrow keys. Select
or de-select sensors with the >ALT< key. Confirm your selection by pressing
>ENTER<.

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2 Water-ultrasonic integrated into flow velocity sensor,
3 2-wire probe EX, e.g. types: NMC0 or HSB0NBP

4 Fixed value for permanently full filled applications or for testing purposes

5 Pressure measurement cell integrated into flow velocity sensor,
6 2-wire probe, e.g. types NM5-3101 or HSB0HG, i-Serie Ex

It is distinguished between the following level sensors:

1 Air-ultrasonic type >OCL< or >DSM< by NIVUS

types: POA-V1H1 or CS2-V2H1

types: POA-V1D0 or CS2-V2D0

Fig. 9-32 Determination of level sensor type

Note

When using combi sensors featuring multiple level measurements (water-

Sensor type 1: Air-ultrasonic (Air-US NIVUS)

ultrasound and pressure measurement cell, e.g. type POA-V1U1 or CS2­V2U1) it is necessary to select both level measurements in the selection
menu.

Level measurement by using active air-ultrasonic sensor from top down. May be
combined with the flow velocity sensor
This sensor can be used to detect low flow levels, e.g. to measure nightly dis­charge.
The sensor must be installed exactly in the centre of the channel vertex, (± 2°)
parallel to the water surface.
An air-ultrasonic sensor type OCL or DSM is required!

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Fig. 9-33 Sensor type 1: air-ultrasonic

Sensor type 2: Water-ultrasonic (Water-US internal)

Level measurement using a combi sensor type V1H or V2H. Level measurement
using water-ultrasound from bottom up.
This sensor type is for discharge detection in medium part filled areas.
The sensor must be installed exactly in the bottom centre observing a maximum
permissible deviation of ±2°.

OCM Pro CF

Important Note

Never use a water-ultrasonic sensor if the sensor is installed out of the centre,
(e.g. sedimentation or risk of soiling)! This may result in echo loss and meas­urement failure.

In this case use a different level sensor (ultrasound from top down or pressure
measurement cell).

Fig. 9-34 Sensor type 2: water-ultrasonic

Sensor type 3: 2-Wire probe EX

This selection is for level measurement by using external 2-wire Ex probes sup­plied by OCM Pro CF such as a pressure probe type NivuBar Plus or a type
NivuCompact echo sounder. Can be combined with the flow velocity sensor.

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Fig. 9-35 Sensor type 3: 2-wire probe EX

Note

For connection see Fig. 7-12 or Fig. 7-29.

Sensor type 4: Fixed value

This programming is designed for permanently full filled pipes and channels.
Level measurement is not required for such applications. The constant filling
level is entered under "Fixed value / Scale / Level" and is used for flow calcula­tion.
This parameter is very helpful during initial start-up procedures or while perform­ing tests without having level readings available as well.

Fig. 9-36 Sensor type 4: fixed value

Sensor type 5: Internal pressure

Here the level is measured by using a combi sensor type V1D/V2D or V1U/V2U
with integrated pressure measurement cell from bottom up. Installation on the
sides, e.g. in case of sedimentation or high pollution loads is possible. Level
measurement in flooded condition is possible as well.

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P

1

1 Sedimentation or soiling

Fig. 9-37 Sensor type 5: internal pressure

Sensor type 6: 2-wire probe

Here the level is measured by using an external 2-wire source such as the type
NivuMaster echo sounder or a pressure probe type HydroBar. Both can be com­bined with the flow velocity sensor .

OCM Pro CF

Fig. 9-38 Sensor type 3: 2-wire probe

Note

For connection see Fig. 7-12 or Fig. 7-29.

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Air-US NIVUS +

Combination between sensor types 1 and 5.

2-Wire probe (Ex) +

Combination between sensor types 3 or 6 and sensor type 5.

Internal Water-US +

Combination from sensor types 2 and 5.

P

1

Sensor combination examples:

On the following pages you can find the combinations possible between the dif­ferent sensor types.
Such combinations are required as soon as one single level sensor is not suffi­cient for level detection covering the desired measurement range due to con­structional reasons (see also Fig. 7-47)

Internal pressure

This combination is recommended for measurement ranges from 0 cm level up
to flood. In this case the air-ultrasonic sensor type OCL or DSM detects low
levels; the pressure sensor detects the flood range. The pressure sensor may
be installed out of the centre if the risk of sedimentation or soiling should occur
(Fig. 7-39).

1 Sedimentation, soiling

Fig. 9-39 Combination: Air-ultrasound and internal pressure

internal pressure

Internal pressure

Same area of use as described under version >air-US + internal pressure<.
However the air-ultrasonic sensor type OCL/DSM will be replaced by a 2-wire
probe.

This combination is recommended for level measurement ranges as from
approx. 0.5 cm up to flood. The pressure sensor is responsible for upper and
lower measurement range. The water-ultrasonic sensor detects the medium
part filled area.
The water-ultrasonic sensor must be installed in the centre of the channel
bottom. Otherwise there is the risk of echo loss and hence measurement failure.

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Air-US NIVUS +

Combination from sensor 1 and 2.
The following combination covers level measurement ranges as from 0 cm up to

Internal Water-US +

Combination from sensor 2 and 6 or 3.

P

P

internal water-US

OCM Pro CF

Fig. 9-40 Water-ultrasound and internal pressure

approx. 80 % full filling. The water-ultrasonic sensor detects levels as from
approx. 7 cm; the air-ultrasonic sensor detects the levels below.
The water-ultrasonic sensor must be installed in the centre of the channel
bottom.

Fig. 9-41 Air- and water-ultrasound

2-Wire probe

To be used in applications as described in water-US int. + air-US. An external
2-wire sensor instead of an air-ultrasonic sensor is going to be used to detect
low flow levels (expediently an echo sounder).

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Air-US NIVUS + Water-

Combination of options 1, 2 and 5.

Water-US internal +

Combination of options 2, 3 or 6 and 5.

Mounting height

This parameter is required only for applications where the sensor is not installed

Fig. 9-42 Water-ultrasound + 2-wire probe

US internal + Pressur e
int.

This combination is recommended from 0 cm filling level up to overflow if the
best possible measuring accuracy is required.
In this case the pressure sensor detects the upper measurement range. The
water-ultrasound sensor detects the medium range and the air-ultrasound
sensor detects the low range.
Please observe to install the water ultrasonic sensor in the centre of the bottom

Fig. 9-43 Sensortyp Luft-Ultraschall, Wasser-Ultraschall und Druck

2-Wire probe (Ex) +
Pressure int.

Application as the combination >Air US + Water US + Pressure<.
An external 2-wire probe (expediently an echo sounder) is used to detect low
filling levels instead of the air-ultrasound sensor.
Please observe to install the water ultrasonic sensor in the centre of the bottom.

directly on the channel bottom but is mounted in a pipe on a wedge support or
out of the centre to avoid effects due to sedimentation.

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The level adjustment in the CAL menu, which is required due to the higher

2 height H: mounting height air-ultrasonic sensor (OCL or DSM)

Note

The value is set to 0.000 m per default as soon as the level sensors have been
selected.

The reference point in front of each level sensor is the unknown variable of the
ground plate or the channel bottom / channel crest.

installation, allows to adjust the respective installation height to the available
conditions and the mounting situation.

1 height h: mounting height of pressure and water-ultrasonic sensor

Fig. 9-44 Mounting height of level se nsors in case of selection air-US

NIVUS, pressure and water-US

1 height h: mounting height sensor type pressure internal

Fig. 9-45 Mounting height of level se nsors in case of selection pressure

internal or water-US internal

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Select layers

This parameter will be indicated only if a sensor combination has been selected.

2 Threshold level between middle and top layers

3 Middle layer sensor

4 Threshold level between middle and bottom layer.

5 Bottom layer sensor Sensor

1 height h: mounting height sensor type air-US-NIVUS

Fig. 9-46 Mounting height level sensor in case of selection air-US NIVUS

Note

As soon as the mounting height of pressure or water-US sensors is
changed, the mounting height in the PAR/Flow velocity menu must be ad­justed by the same amount!

The OCM Pro CF automatically aligns the sensors to partial layers.
Layer borders however may be defined freely as well. Use the >ALT<-key to do
this. Determine the threshold levels between the layers using the box in the
>from< line.

1 Top layer sensor

Fig. 9-47 Select layers

After being selected the level sensors will be indicated on the screen.

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Scale

Depending on the sensor type selected, a fixed value or a measurement offset

ded to the level measurement value. Negative entries are

Fig. 9-48 Overview on level sensors

as well as the measurement span according to the input signal is entered here.

Offset: this value is ad
possible as well, which can be used to adjust values from the 2-wire probe.
Span: the measurement span (equal to 20 mA from the OCM Pro CF analog
input) shall be adjusted to the span of the analog output of the 2-wire probe
used.

Fig. 9-49 2-wire sensor settings

Fig. 9-50 Screen at 2-wire sensor Ex/non-Ex

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Important Note

Connect the 2-wire probes, which are supplied by the transmitter, to the Ex
terminal clamps:

- wall mount enclosure: D8 + and D9

- panel mount enclosure: B 21 + and C 21 -

Set the sensor type 2 to „2-wire_probe Ex“.
Failure to observe leads to loss of Ex protection.

Important Note

Connect externally supplied level signals always to the clamps in the non-Ex
area (e.g. NivuMaster or i-series Ex)

- wall mount enclosure: B16 +, B18 -

- panel mount enclosure : B15 +, B17 -

Set the sensor type 2 to „2-wire_probe“
Failure to observe leads to loss of Ex protection.

Note

Note Fig. 7-12 to Fig. 7-14 and Fig. 7-29 to Fig. 7-31 for sensor connection.

Fig. 9-51 Application example for water-US + 2 Wire probe

Please note when you use combined level detection via different sensors that
only one measurement method is responsible for volume calculation. The appli­cable measurement method has to be selected depending on the level/height
and must be determined during the programming procedure.

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Sensor type

In v-Sensor mode it is possible to change the sensor type using the >ALT< key.

applications where the flow velocity sensor is heading upstream (unlike heading

In order to ensure reliable level detection at any time, please observe the hy­draulic and metrological basic conditions.
With the memory mode enabled and a plugged memory card, all possible set
and measured levels will be saved. Hence, it is possible to verify and to recalcu­late values at any time.
It is necessary to choose the appropriate level measurement method during the
preliminary stages of project planning.

Important Note

When choosing the measurement method, please observe to connect a suffi­cient sensor which is equipped with appropriate measurement elements!

Preferably use NIVUS sensors.

Important Note

While setting combi sensors using different lev e l measuring methods in vary­ing areas, programming errors may arise very easily.

If in doubt please use the assistance provided by our commissioning service
or an expert company authorised by NIVUS!!

9.5.3 Parameter Menu „velocity “

The number of sensors is set to >1< per default. This setting meets the require­ments of most applications. In case of using multiple sensors (e.g. in subdivided
cross-sections) the number of sensors can be modified by using the "up" or
"down" arrow keys.

Fig. 9-52 Setting the number of sensors

Select the type of sensor construction used.
Installation position of the sensor is set to “positive“ per default. This
parameter should not be modified! It is going to be used only for special

downstream towards the flow direction as in standard applications) but is to
detect positive velocities however. This is the only case which requires to set
“negative“ here

Fig. 9-53 Select sensor type and mounting positi on

.

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V_sensor wedge: Flow velocit y measurement using a wedge sensor.

V_sensor tube: Flow velocity measurement using a pipe / tube sensor.

V_sensor float:

Flow velocity measurement using a sensor fastened on a float. In this case the
measurment is executed from the top down.

V_sensor Pos-alpha:

Flow velocity measurement using a wedge or pipe / tube sensor installed in an
angle varying from the perpendicular.

V-sensor radar:

Flow velocity measurement using a surface radar sensor installed in posit iv e or
negative direction above the water surface

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2 Sensor type (wedge, tube, float, Pos-alpha)

3 Installation position (positive, negative)

4 Number of sensors (1x, 2x, 3x)

5 Angle >b< is the angle varying from perpend ic ular at P os -Alpha

6 Mounting height of flow velocity sensor

Mounting place

This menu point is to modify the installation height (h) of the flow velocity

etting does not need to be modified

elevated or depressed installation must be added to or subtracted from the 0 m.

the ground plate,

1 Sensor number (1, 2, 3)

Fig. 9-54 Indication of sensor types

sensor. The standard setting is 0 mm. This s
unless the wedge or tube sensor has been installed higher or lower. In case of

The reference point of the wedge sensor is the bottom edge of
with the pipe sensor it is the horizontal area at the tip of the sensor.
Enter the distance between water surface and the centre of the immersed flow
velocity sensor crystal as soon as the sensor type "Float" has been selected.
If sensor type "float" has been selected, enter the distance from the water
surface to horizontal area at the tip of the pipe sensor here..