Nivus osm-f Operation Instruction Manual

Instruction Manual

OCM F

OCM F - Rev. 04 as of 18.02.2014 Page 1

Instruction Manual for

OCM F 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

ab Software-Revisionsnummer 3.13

Branch offices

page 2

®

NIVUS 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 F

OCM F - Rev. 04 as of 18.02.2014 Page 3

Translation

If the device is sold to a country in the European Economic Area (EEA)
this instruction handbook must be translated into the language of the
country in which the device is to be used.
Should the translated text be unclear, the original instruction handbook
(German) must be consulted or the manufacturer contacted for clarifica­tion.

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 descriptive names, trade names, trademarks and the
like in this handbook does not entitle the reader to assume they may be
used freely by everyone. They are often protected registered trademarks
even if not marked as such.

Instruction Manual

Page 4 OCM F - Rev. 04 as of 18.02.2014

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1 Contents

1.1 Table of Contents

OCM F

1 Contents ............................................................................... 4

1.1 Table of Contents .......................................................................... 4

2 General ................................................................................. 6

3 General Notes on Safety and Danger ................................. 7

3.1 General Danger Signs ................................................................... 7

3.2 Special Danger Notes ................................................................... 7

3.3 Turn-off procedure ......................................................................... 7

3.4 Device Identification ...................................................................... 8

4 Overview and use in accordan ce with the r equ irem ent s . 9

4.1 Overview ....................................................................................... 9

4.2 Use in accordance with the requirements ..................................... 9

4.3 Specifications .............................................................................. 11

4.4 Installation of Spare Parts and Parts subject to Wear and Tear . 11

4.5 User’s Responsibility ................................................................... 12

5 Function principle .............................................................. 13

5.1 General ........................................................................................ 13

5.2 Level Measurement using Pressure ............................................ 14

5.3 Flow Velocity Detection ............................................................... 15

5.4 Unit Versions ............................................................................... 16

6 Storing, Delivery and Transport ....................................... 17

6.1 Receipt ........................................................................................ 17

6.2 Delivery ....................................................................................... 17

6.3 Storing ......................................................................................... 17

6.4 Transport ..................................................................................... 18

6.5 Return .......................................................................................... 18

7 Installation .......................................................................... 19

7.1 General ........................................................................................ 19

7.2 Enclosure Dimensions................................................................. 19

7.3 Transmitter Installation and Connection...................................... 20

7.3.1 General ........................................................................................ 20

7.3.2 Safety Instructions for the Cabling .............................................. 20

7.3.3 Hints for the avoidance of Electrostatic Discharge (ESD) ........... 21

7.4 Electrical Installation.................................................................... 21

7.4.1 Transmitter Connection ............................................................... 22

7.4.2 KDA Sensor Connection ............................................................. 25

7.5 OCM F Power Supply.................................................................. 28

7.6 Overvoltage Protection Precautions ............................................ 29

7.7 Regulator Mode ........................................................................... 32

7.7.1 General ........................................................................................ 32

7.7.2 Construction of Measurement Section and Control Section ....... 33

7.7.3 Connection for Controller Operation ........................................... 34

7.7.4 Control Algorithm ......................................................................... 35

8 Initial start-up ..................................................................... 36

8.1 Notes to the User ........................................................................ 36

8.2 General Principles ....................................................................... 36

8.3 Keypad ........................................................................................ 37

8.4 Display ......................................................................................... 37

8.5 Operation Basics ......................................................................... 39

Instruction Manual

OCM F

OCM F - Rev. 04 as of 18.02.2014 Page 5

9 Parameter Setting ..............................................................40

9.1 Basics .......................................................................................... 40

9.2 Operation Mode (RUN) ............................................................... 41

9.3 Display Menu (EXTRA) ............................................................... 44

9.4 Parameter Menu (PAR) ............................................................... 47

9.4.1 Parameter Menu „Measurement Place“ ...................................... 47

9.4.2 Parameter Menu “Level“ .............................................................51

9.4.3

Information on how to connect i-Series sensors. ........................ 54

9.4.4 Parameter Menu „Flow Velocity“ ................................................. 55

9.4.5 Parameter Menu „Digital Inputs“ ................................................. 55

9.4.6 Parameter Menu “Analog Outputs“ ............................................. 57

9.4.7 8.4.6 Parameter Menu "Relays“ .................................................. 60

9.4.8 Parameter Menu “Control Unit“ ...................................................62

9.4.9

Parameter Menu „Setup Parameter“ ........................................... 65

9.5 Signal Input-/Output Menu (I/O) .................................................. 67

9.5.1 I/O Menu “Digital Inputs” ............................................................. 67

9.5.2 I/O Menu “Analog Outputs” ......................................................... 67

9.5.3 I/O Menu „Digital Outputs” .......................................................... 68

9.5.4 I/O Menu „Measurement Data” ................................................... 68

9.5.5 I/O Menu “Sensor-Info”................................................................ 69

9.5.6 I/O-Menu „v-Histogram”...............................................................69

9.5.7

I/O Menu “External Level“ ........................................................... 70

9.5.8 I/O Menu “Control Unit” ............................................................... 71

9.5.9 I/O Menu “Test control unit – manual mode” .............................. 71

9.6 Calibration and Calculation Menu (CAL) ..................................... 72

9.6.1 CAL Menu “Level“ ....................................................................... 72

9.6.2 CAL Menu “Flow Velocity“ ........................................................... 73

9.6.3 CAL Menu “Analog Outputs“ ....................................................... 77

9.6.4 Basic Hints on Simulation: ..........................................................77

9.6.5

CAL Menu „Digital outputs“ ......................................................... 79

9.6.6 CAL Menu „Simulation“ ............................................................... 79

9.7 Parameter storage ....................................................................... 80

10 Parameter tree....................................................................82

11 Troubleshooting ................................................................88

12 Verification of the Measurement System.........................91

12.1 General ........................................................................................ 91

12.2 Verification of Combi Sensor with Pressure Measurement Cell . 91

12.3 Verification of external Level Measurement ................................ 92

12.4 Verification and Simulation of Input and Output Signals ............. 93

12.5 Verification of Flow Velocity Measurement ................................. 93

13 Maintenance and Cleaning ...............................................94

13.1 General Maintenance .................................................................. 94

13.2 KDA-Sensor ................................................................................94

13.3

Accessories (optional) ................................................................. 95

14 Table „Manning - Strickler Coefficients“ .........................96

15 Emergency .........................................................................97

16 Dismantling/Disposal ........................................................97

17 Table of Pictures................................................................97

18 Index .................................................................................100

19 Certificates and Approvals .............................................101

Instruction Manual

Page 6 OCM F - Rev. 04 as of 18.02.2014

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2 General

OCM F

Important

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

This Instruction manual for the measurement transmitter OCM F is intended for
the initial start-up of the unit depicted on the title page.
Read the instructions carefully prior to use.

This Instruction manual is part of the OCM F delivery and shall be available to
users at any time. The safety instructions contained therein must be followed.
In case of selling the OCM F this technical description must be provided to the
purchaser.

The operation of the complete system is described in the separate manual
>Technical Instruction for Doppler Sensors< and >Installation Instructions for
Correlation and Doppler Sensors<.
Instructions on how to connect external level sensors are provided with the
standard delivery of the according sensors (e.g. NivuCompact, i-Series sen­sors…).

Instruction Manual

OCM F

OCM F - Rev. 04 as of 18.02.2014 Page 7

3 General Notes on Safety and Danger

3.1 General Danger Signs

Cautions

are framed and labelled with a warning triangle.

This indicates an immediate high risk threatening life and limb.

Danger by electric voltage

is framed and labelled with the Symbol on the left.

Warnings

are framed and labelled with a “STOP“-sign.

This indicates a possible risk to persons as well as possible damage to facili­ties and material.

Notes

are framed and labelled with a “hand“

For connection, initial start-up and operation of the OCM F 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, which go beyond steps to install, to connect or to program the
device, must be carried out by NIVUS staff only due to reasons of safety and
guarantee.

3.2 Special Danger Notes

WARNING

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.

3.3 Turn-off procedure

For maintenance, cleaning and repairs (authorised staff personnel only!) the
device shall be disconnected from mains.

Instruction Manual

Page 8 OCM F - Rev. 04 as of 18.02.2014

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3.4 Device Identification

The instructions in this manual apply only for the type of device indicated on the
title page. The nameplate is fixed on the 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 Special Dan-

ger Notes.

It is important for enquiries and replacement part orders to specify article num­ber as well as serial number of the respective transmitter or sensor. This en­sures correct and quick processing.

OCM F

Fig. 3-1 Transmitter nameplate

This instruction manual is a part of the device and must be available for the
user at any time.

The safety instructions contained within must be followed.

In addition to this instruction manual please see the "Technical Instruction of
Doppler Sensors" as well as the "Installation Instruction for Correlation and
Doppler Sensors" to correctly install and to operate the complete system.

WARNING

Do not disable safety devices!

It is strictly prohibited to disable safety measures or to change the way
they work!

Instruction Manual

OCM F

OCM F - Rev. 04 as of 18.02.2014 Page 9

2 Display

3 Keypad

4 Cable Glands

5 Terminal Clamp Housing

6 USB-B Interface

7 Pipe Sensor with retaining element

8 Wedge Sensor (Flow Velocity)

4 Overview and use in accordance with the requirements

4.1 Overview

1 Clear view door

Fig. 4-1 Overview

4.2 Use in accordance with the requirements

WARNING

Damage due to improper use

The device is exclusively intended to be used for purposes as described
above.
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 has to be made.

The measurement device type OCM F including the respective sensor technolo­gy is intended to be used for continuous flow measurement and control tasks of
slight to heavy polluted media in part filled and permanent full pipes, channels or
similar.
Here the allowed maximum values, as specified in chapter 4.3 shall be strictly
kept. All cases which vary from these conditions and are not passed by NIVUS
GmbH in writing are left at owner’s risk.

Instruction Manual

OCM F

Page 10 OCM F - Rev. 04 as of 18.02.2014

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Transmitter Approval:

Note:

For installation and initial start-up the conformity certificates and test certifi­cates of the respective authorities as well as applicable national regulations
shall be followed.

Important Note

The transmitter and the sensors always have to be installed outside of Ex­zones!

Ex Approval

The Ex-version of the transmitter is designed for use in areas featuring explosive
atmosphere according to Zone 1.

II(2)G [Ex ib] IIB

WARNING

The approval is only valid in connection with the respective indication on the
transmitter or the sensor nameplate.

The OCM F Ex version is adjusted to the NIVUS Doppler sensors, type KDA
requirements regarding the intrinsically safe system review 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 F Ex version can be taken from the
EC-type examination certificate IBExU07ATEX1081.

Note:

The Ex approval of the active sensors is part of the "Technical Instructions for
Doppler Sensors”.

Instruction Manual

OCM F

OCM F - Rev. 04 as of 18.02.2014 Page 11

Power supply

85 to 260 V AC, 47 to 63 Hz
Power consumption

max. 18 VA (7 VA typical)

Enclosure

Material: Polycarbonate

Ex-Approval (optional)

II(2)G [Ex ib] IIB

Operating temperature

-20 °C to +60 °C (-4 °F to +140 °F)
Storage temperature

-30 °C to +70 °C (-22 °F to +158 °F)

Max. humidity

90 %, non-condensing

Display

back-lit full graphic LC display, 128 x 64 pixel

Operation

6 keys, menu driven in German, English, French and Polish

Inputs

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

Outputs
Controller

three-step controller, quick close control, adjustable slide valve posi-

4.3 Specifications

or 24 V DC ±15 %, 5 % residual fluctuation

-

- Weight: approx. 1200 g

- Protection: IP 65

- Mounting wall or DIN rail mount

Ex: -20 °C to +40 °C (-4 °F to +104 °F)

-

- 2 x 0/4 – 20 mA, 122 bit resolution for external level measurement

and external set points

- 4 x digital input

- 1 compact Doppler active sensor, type KDA, connectable

- 3 x 0/4 – 20 mA, load 500 Ohm, 12 bit resolution, accuracy better

than 0.1 % (after adjustment)

- 5 switchable relays, loadable up to 230 V AC / 2 A (cos. ϕ 0,9 )

tion in error case, auto-flush function in case of blocked slide valve

4.4 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.
Damages caused by using non-original parts and non-original accessories are
left at user’s risk. Appropriate accessories and spare parts can be found in chap­ter 13.3.

Instruction Manual

Page 12 OCM F - Rev. 04 as of 18.02.2014

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4.5 User’s Responsibility

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.
In Germany the Industrial Safety Ordinance must be observed.

The customer must (where necessary) obtain any local operating permits re-

quired 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)

OCM F

- environmental protection.

Connections

Before operating the device the user has to ensure, that the local regulations
(e.g. for operation in channels) on installation and initial start-up are taken into
account, if this is both carried out by the user.

This instruction manual is a part of the device and must be available for the
user at any time.

The safety instructions contained within must be followed.

In addition to this instruction manual please see the "Technical Instruction of
Doppler Sensors" as well as the "Installation Instruction for Correlation and
Doppler Sensors" to correctly install and to operate the complete system.

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

Instruction Manual

OCM F

OCM F - Rev. 04 as of 18.02.2014 Page 13

2 Acoustic coupling layer with sonic converter behind

3 Temperature sensor

4 Electronics

5 Pressure measurement cell (option)

6 Duct to pressure measurement (option)

7 Cable gland

8 Sensor cable

5 Function principle

5.1 General

The OCM F is a permanent measurement system for flow measurement and
flow control. The device is designed to be used primarily in slight to heavy pol­luted media with various compositions. It can be operated in partial and perma­nent filled channels and pipes with various shapes and dimensions.

The measurement method is based on the ultrasound Doppler principle.
Hence, it is indispensable for the system’s capability to work that the water
contains particles which are able to reflect the ultrasonic signal sent by the
sensor (dirt particles, gas bubbles or similar).

The OCM F utilises an active compact Doppler sensor Type KDA (after this
named >KDA sensor<). This KDA sensor is available as flow velocity and combi
sensor. The combi sensor Type “KDA“ can be combined with a sensor­integrated pressure measurement cell for hydrostatic level measurement.

1 Ground plate

Fig. 5-1 Construction of combi sensor Type “KDA“ with additional

pressure measurement cell

Instruction Manual

OCM F

Page 14 OCM F - Rev. 04 as of 18.02.2014

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2 Sensor enclosure

3 Double nipple

4 Spigot nut

5 Cable gland

6 Sensor cable

7 Adjustment aid (screw M4)

8 Retaining element

1 Sensor head

Fig. 5-2 Construction pipe sensor, type KDA

5.2 Level Measurement using Pressure

The combi sensor type “KDA“ additionally contains a hydrostatic level measure­ment via integrated pressure measurement cell.
The piezo-resistive pressure sensor operates according to the relative pressure
principle, i.e. the pressure of the standing water column above the sensor is di­rect proportional to the flow level.
During initial start-up procedure, the pressure sensor is going to be adjusted by
entering a manually investigated reference value.

Instruction Manual

OCM F

OCM F - Rev. 04 as of 18.02.2014 Page 15

5.3 Flow Velocity Detection

The flow velocity sensor, type “KDA“ operates according to the continuous Dop­pler principle (CW-Doppler) using 2 built-in piezo crystals with a slope of 45°.
The crystal surfaces are arranged parallel to the slope of the flow velocity sen­sor. One of the crystals continuously operates as ultrasonic transmitter, the other
one as receiver detecting the reflected ultrasonic signal.

The sensor enclosure enables acoustic coupling of the high-frequency ultrasonic
signal between piezo crystal/enclosure and enclosure/medium. Due to that rea­son an ultrasonic signal with an angle of 45° is sent permanently against the flow
direction of the medium to be measured. As soon as the signal hits dirt particles,
gas bubbles or similar a portion of the sonic energy is reflected, being converted
into an electric signal by the receiving crystal subsequently.

Caused by the movement of the reflecting particles in relation to the acoustic
source the frequency of the ultrasonic signal is shifted. The resulting frequency
shift is directly proportional to the particles’ movement within the medium and
hence represents the flow velocity.
The sensor processes the received reflection signal, converting it to be sent to
the transmitter.

Due to varying velocities within the flow profile, vorticity, rotation of single reflect­ing particles, surface waves etc. a frequency mixture is emerging. This mixture is
evaluated directly within the KDA sensor regarding statistic considerations relat­ed to average flow velocity. The frequency mixture is indicated on the transmitter
display in >I/O / v-Histogram< (see chapter 9.5.6).

It is recommended to verify the measurement if conditions are disadvantageous
from a hydraulic standpoint. Verification should not be based on the CW-Doppler
method since in this case it is not possible to spatially allocate recorded flow ve­locities.
In this case the VDI/VDE Directive 2640 is very helpful and important.
NIVUS recommends the portable meter Type >PVM/PD< or >PCM Pro< as cali­bration measurement or the NIVUS initial start-up service.

Instruction Manual

Page 16 OCM F - Rev. 04 as of 18.02.2014

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OCF- Type

00

Enclosure
W0 w all mount IP 65

Power Supply

AC 85 - 265 V AC, 47-63 Hz
DC 20 - 28 V DC

Approvals
0 non
E Intrinsically saf e s ensor supply in Ex zone 1

OCF- 00 W0

Standard version for various pipe and channel shapes. 5 relays, 3 mA
outputs (galv. isolated), 1 mA input (galv. isolated w ith 2-w ire sensor
supply) or f or external level measurement , integrated 3-s tep controller

5.4 Unit Versions

OCM F

The OCM F transmitter is available in different versions. The tables below give a
brief overview on the various possibilities.
The transmitters primarily vary in terms of 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 this article key the type of device can be specified.

Fig. 5-3 Type key for OCM F measurement transmitter

Instruction Manual

OCM F

OCM F - Rev. 04 as of 18.02.2014 Page 17

Transmitter:

min. temperature: - 30 °C (-22 °F)

KDA-Sensor:

min. temperature: - 30 °C (-22 °F)

6 Storing, Delivery and Transport

6.1 Receipt

Please check your delivery if it is complete and in working order according to
the delivery note immediately after receipt. Any damage resulting from transport
or transit shall be reported to the carrier instantly. An immediate, written report
must be sent to NIVUS GmbH Eppingen as well.
Please report any shortcoming due to delivery to your representative or directly
to NIVUS Eppingen within two weeks in writing.

Mistakes cannot be rectified later!

6.2 Delivery

The standard delivery of the OCM F measurement transmitter contains:

6.3 Storing

− the instruction manual with the certificate of conformity. All required steps to
correctly install and to operate the measurement system are listed herein.

− a OCM F transmitter

− a screwdriver with a 2.5 mm (0.098 in) blade for connecting the sensor inside

the terminal clamp housing

Additional accessories such as sensors, pressure compensation element (in
case of using sensors, type “KDA” with integrated pressure measurement cell
combi sensor), overvoltage protection, separate level measurements etc. de­pending on order. Please check by using the delivery note.

The following storing conditions must be strictly adhered to:

max. temperature: + 70 °C (158 °F)
max. humidity: 80 %, non-condensing

max. temperature: + 70 °C (158 °F)
max. humidity: 100 %

The devices must be protected from corrosive or organic solvent vapours, radio­active radiation as well as strong electromagnetic radiation.

Instruction Manual

Page 18 OCM F - Rev. 04 as of 18.02.2014

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6.4 Transport

6.5 Return

OCM F

Sensor and Transmitter are conceived for harsh industrial conditions. Despite
this do not expose them to heavy shocks or vibrations.
Transportation must be carried out in the original packaging.

The units must be returned at customer cost to NIVUS Eppingen in the
original packaging.
Otherwise the return cannot be accepted!

Instruction Manual

OCM F

OCM F - Rev. 04 as of 18.02.2014 Page 19

7 Installation

7.1 General

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

The OCM F power supply must be separately protected by a 6 A slow-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. The installation should be carried out by qualified personnel
only. Further statutory standards, regulations and technical rulings have to be
taken 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 mm
(0.03 in
tion rating is IP 65.
The maximum allowed switching voltage on the relay contacts must not exceed
250 V. According to Ex protection it must be checked if the devices power sup­plies must be integrated into the facility’s emergency shutdown conception.

2

) and must be in accordance to IEC 227 or IEC 245. The device protec-

2

7.2 Enclosure Dimensions

Fig. 7-1 Wall mount enclosure

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Page 20 OCM F - Rev. 04 as of 18.02.2014

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7.3 Transmitter Installation and Connection

Important Note:

- Ensure the installation is completed properly!

7.3.1 General

- Comply with the existing legal and/or operational directives!

- Improper handling can cause injuries and/or damage to the devices!

The transmitters mounting place has to be selected according to certain criteria.
Please strictly avoid:

- direct sunlight (use weatherproof cover if necessary)

- heat emitting objects (max. ambient temperature: +40 °C (104 °F))

- objects with strong electromagnetic fields (e.g. frequency converters, electric

motors with high power consumption or similar)

- corrosive chemicals or gas

- mechanical shocks

- installation close to footpaths or travel ways

- vibrations

- radioactive radiation

The clear view door of the measurement transmitter is provided with a protection
foil for protection during transport and from scratches during assembly. This pro­tection foil has to be removed immediately after the assembly.

Clear view door

The clear view door as well as the display of the measurement transmitter is
provided with a protection foil for protection during transport and from scratches
during assembly. This protection foil has to be removed immediately after the
assembly.

OCM F

If the view door or the display protection foil has been exposed to direct solar
radiation for a long period, it cannot be removed easily.

In this case view door or display can be cleaned using spirit or if necessary with
car polish. If this is not successful, door or display must be replaced by NIVUS.
This service is subject to charge.

7.3.2 Safety Instructions for the Cabling

If connections are placed to the OCM F, the following warnings and information
must be observed, in addition to the warnings and information found in the indi­vidual chapters for installation.

Instruction Manual

OCM F

OCM F - Rev. 04 as of 18.02.2014 Page 21

7.3.3 Hints for the avoidance of Electrostatic Discharge (ESD)

Important Note:

Since the OCM F does not require any power source please disconnect the
unit from mains prior to maintenance works to minimise danger and risks due
to electrostatic discharge.

The sensitive electronic components inside the device can be damaged by static
electricity, which can impair the device performance or even cause the device to
fail. The manufacturer recommends the following steps to prevent any damage
to the device caused by electrostatic discharges:

− Make sure to discharge any static electricity from your body before touching
the electronic modules of the unit (such as circuit boards as well as their
components). To do so touch a grounded metallic surface, such as the en­closure frame or a metal pipe.

− Avoid any unnecessary movements to prevent built-up static charges.

− Use antistatic containers or packaging to transport the static sensitive com-

ponents.

− Prevent damage to internal electronics from electrostatic discharges (ESD)
by discharging your body to a grounding point (e.g. use of wrist strap)

− Do not touch components sensitive to static electricity outside of antistatic
working areas. Always use antistatic floor covering and working surfaces if
possible.

7.4 Electrical Installation

Important Note:

All installation work, which is described in the following section, must be car­ried out by NIVUS staff only due to reasons of safety and guarantee.

Instruction Manual

Page 22 OCM F - Rev. 04 as of 18.02.2014

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7.4.1 Transmitter Connection

Important Note:

Each time before opening the enclosure please ensure to disconnect the
measurement system from any voltage.

Important Note

Never remove the faceplate!

Important Note

Water or dirt must not leak into the terminal housing. Please seal the housing
with the supplied lid and both screws respectively.

Installation Wall Mount Enclosure:

Ensure the installation is completed properly!
The most simple way to install a wall mount enclosure is to fasten a DIN rail with
a length of 210 mm (8.3 in.) and then to snap-on the enclosure.
It is possible to install the enclosure by using 3 screws as well. Use a pan head
screw with a head diameter of 5.5 ... 8.0 mm (0.22 ... 0.32 in.) for this. This
screw must be screwed into the mounting plate protruding 4 mm (0.16 in.). Then
hang the enclosure on the screw and additionally fix it with 2 more screws from
the terminal clamp housing. Please observe to screw them at least 40 mm into
the wall or 50 mm into appropriate dowels (to be set).

General

The wall mount enclosure can be equipped with cable glands and comes with
following installation parts:

OCM F

− 1 glands M16 x 1.5

− 2 glands M20 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

− M20 x 1,5 6,0 mm – 14,0 mm

To be able to use cable diameters outside of the tolerance, glands must be used
which ensure IP 65 minimum protection. Unused lead-ins have to be locked with
an appropriate dummy plug before the initial start-up.

In terms of electric connection please note the device configuration since un­specified inputs, outputs as well as power supply connections are not connect­ed.

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Important note

Before the first connection it is necessary to have a slight pressure on the
screw of the clamping connection to ensure safe opening and a correct con­nection. All further clamps are tension spring clamps with screw clamps.

On power supply and relay clamps one copper wire with a maximum cross­section of 2.5 mm² (0.01 in.) can be connected per clamp. Connection is made
by using terminal clamps and a screwdriver with a 3.5 mm (0.14 in.) blade.

Fig. 7-2 Connection Enclosure

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Fig. 7-3 Clamp wiring OCM F

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7.4.2 KDA Sensor Connection

Important Note:

Always disconnect the measurement system from mains prior to connecting
any sensors.

For use of the KDA sensors in the Ex-area, the sensor cables must not be
directed past the mechanical shield between the termination blocks. Use only
the two cable connections of the Ex-connection block!

The sensor cable has to be connected to the transmitter at the termination block
using tension spring clamps or connectors with screw clamps depending on ver­sion.

− Lead the sensor cable from outside through the cable gland.

− Now connect the sensor cables to the connection board as descripted in the

wiring diagram

− Tighten the cable gland to fix the sensor cable.

The diagram below applies in case of connecting a KDA flow velocity combi
sensor:

Fig. 7-4 Connection of 1 wedge or pipe sensor (no Ex), Type K0 or R0

Fig. 7-5 Connection of 1 KDA combi sensor (no Ex) with integrated

pressure measurement cell, Type KP

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Fig. 7-6 Connection of 1 KDA wedge or pipe sensor (Ex), Type K0 or R0

Fig. 7-7 Connection of 1 KDA combi sensor (Ex) with integrated pres-

sure measurement cell, Type KP

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 250 m (820 ft)
between KDA sensor and transmitter by taking the maximum permissible re­sistance into account.

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 F,
please follow the wiring diagram below:

Fig. 7-8 Connecting an ext. 2-wire sensor (no Ex) for flow level meas-

urement

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Fig. 7-9 Connecting a NIVUS i-Serial sensor for level measurement in

Ex-Zone 1

Important Note

The Zone 1 Ex approval of i-Series sensors is guaranteed thanks to protection
encapsulation category "Ex m". These sensors hence must not be connected
to the intrinsically safe terminal clamps (Ex ia) of the transmitter.

This would cancel the protection rating of the intrinsically safe terminal clamps
(47/46) of the transmitter and thus invalidate the according Ex approval.

Fig. 7-10 Connecting an ext. 2-wire sensor (Ex) for flow level measure-

ment

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

Fig. 7-11 Connecting an external flow level measurement via NivuMaster

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7.5 OCM F Power Supply

Depending on the type of OCM F used, it can be supplied, with 85-260 V AC.
Also possible is a 24 V DC supply. The two slide switches located above the
terminals serve as additional power switch.

Fig. 7-12 Slide switch position in terminal clamp housing

OCM F

A transmitter with 24 V DC cannot be operated with alternating current, just as
it is impossible to operate a 230 V AC transmitter with direct current.

When operated with alternating current, the direct current supply clamps 4 and 5
both provide a voltage of 24 V and max. 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.

Fig. 7-13 AC model power supply

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Fig. 7-14 DC model power supply

7.6 Overvoltage Protection Precautions

Using overvoltage protection elements for sensor protection reduces the pos­sible maximum cable length.
The series resistance is 0.3 Ohm per wire and must be added to the maxi­mum permissible total resistance (please refer to the "Technical Instruction of
Doppler Sensors" manual)

For effective protection of the OCM F transmitter it is necessary to protect power
supply and mA inputs and outputs.

NIVUS recommends surge arrestors type:

>EnerPro< 220 Tr< (at 230 V AC) or
>EnerPro 24 V< (at 24 V DC).

For mA outputs and inputs type:

>DataPro 2x1 24 V / 24 V<

The flow velocity sensor is internally protected against overvoltage. In case of an
expected high hazard potential it is possible to protect the sensor by using a
combination of the Types:

For Ex-Sensors:

>SonicPro 3x1 24 V / 24 V Ex< and >DataPro 2x1 12 V / 12 V 11μH Tr (N)<

For Non-Ex-Sensors:

>SonicPro 3x1 24 V / 24 V< and >DataPro 2x1 24 V / 24 V Tr<

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Fig. 7-15 Connecting the overvoltage protection for power supply and

analog inputs and outputs

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Fig. 7-16 Overvoltage protection compact Doppler active sensor

Fig. 7-17 Overvoltage protection compact Doppler active sensor (Ex)

When using the sensors in Ex areas the electrical values of overvoltage pro­tection elements as well as capacities and inductance of the KDA sensor ca­ble shall be considered additionally!

The NIVUS cable lengths below are allowed for use in Ex areas:

- unilateral overvoltage protection: 135 m

- double-sided overvoltage protection: 120 m

Please 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. Incorrect wiring will deacti­vate the overvoltage protection function!

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7.7 Regulator Mode

7.7.1 General

Knowledge in control technologies is necessarily required to correctly and
safely set the regulator!

Typically there are sluice gate valves, knife gate valves or iris gate valves with
electrically driven three-step controller in use. Analog-driven 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 “OPEN“ and “CLOSE“ as well as the torque switches “CLOSE“
are a mandatory requirement. These signals have to be connected to the digital
inputs 1-3 of the measurement transmitter. Please note to select gold-plated
contacts in order to ensure contact reliability. Connect a signal relay between
switches and measurement transmitter digital input to safely conduct the 10 mA
input current.
Analog position feedback to the measurement transmitter is not planned.
The measurement transmitter OCM F 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 relays 4 and 5 are assigned as default. Hence,
relay 4 as “slide valve closed“ and relay 5 as “slide valve open“ are defined.
Analog input 2 is assigned for entering external setpoints (see Fig. 7-19).

OCM F

The assignment of the digital outputs for the regulator cannot be modified.

The input current on the digital inputs of the OCM F 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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1 Hand-slide valve

2 Ultrasonic sensor P-Series

3 Regulation-slide valve

4 Install pipe sensor using nozzle or tapping saddle

7.7.2 Construction of Measurement Section and Control Section

You can find a detailed description of measurement and control sections in the
"Installation Instruction for Correlation and Doppler Sensors" manual.

Fig. 7-18 Setup of a controlled system such as a discharge control

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7.7.3 Connection for Controller Operation

OCM F

Fig. 7-19 Wiring diagram for controller operation

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max. slide valve runtime

max. flow

7.7.4 Control Algorithm

If the regulator function is selected (see also Chapter 9.4.8), relay 4 is used for
“CLOSE SLIDE VALVE“ and relay 5 for “OPEN SLIDE VALVE“ function. 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 CLOSED“ of the slide valve drive.
The input current per digital input is 10 mA.

In case of driving the slide valves via the digital inputs always use all the
3 messages. Activating one message only may result in disturbed regulator
operation.

The regulator can be operated with external or internal set point.
External setpoints have to be routed to analog input 4 (clamps 41+ and
42 GND).
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 F is go­ing to access the internal setpoint ( 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

actual value

) • P_factor •

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8 Initial start-up

8.1 Notes to the User

OCM F

For proper start-up of the entire system it might be necessary to additionally
refer to the accessories manuals below.

>Installation instructions for Correlation and Doppler sensors<
>Technical instructions for Doppler sensors<
These manuals are part of the accessories standard delivery.

Before you connect and operate the OCM F 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 hydraulics.
To ensure a correct function of the OCM F this instruction manual must be read
thoroughly!
It is vital to read and comply with the safety instructions!
The OCM F must be wired in accordance with the wiring diagram, see Fig. 7-3!
If any problems regarding installation, connection or programming should occur
please contact our technical division or our service centre.

NIVUS GmbH

Service hotline, Phone [phone]
or by e-Mail to: [e-mail]

For initial start-up of the complete system, the instruction manuals of the acces­sories have also to be read. These manuals are included in the accessories de­livery.

8.2 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 F 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 7.4.1 and 7.4.2) the
parameters must be set.

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2 Escape key

3 Confirm key (ENTER)

2 Flow

3 Total

4 Relay status

8.3 Keypad

In the most cases all you need is:

- geometry of the measurement place and dimensions

- used sensors and positioning

- display units

- span and function of analog and digital outputs

The OCM F user surface was designed in a way that even unfamiliar users are
able to easily set up basic settings in dialog mode which ensure reliable device
operation.
For extensive programming, difficult hydraulic conditions, in case of absence of
expert staff or if a setup and error protocol is required, the programming should
be carried out by the manufacturer or an expert company which is authorised by
the manufacturer.

For data input there is a comfortable 6-button keypad available.
Due to mechanic and electronic reasons the keypad has a membrane cover with
abrasion-proof labelling.

8.4 Display

1 Arrow keys (control)

Fig. 8-1 Keypad

OCM F has a large back-lit graphic display with a resolution of 128 x 64 pixel.
This enables convenient communication.

1 Name of measurement place

Fig. 8-2 Main screen

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2 Velocity

3 Medium temperature

4 Current date / system time

5 Digital input status

RUN

Standard operation mode. It allows to display day totals and, if

PAR

This menu is the most extensive of the OCM F. It is for the com-

I/O

This menu includes information about internal operation of the

CAL

Set maximum and minimum measurable flow velocity here. Calibra-

EXTRA

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

After confirming with >ENTER< the auxiliary screen appears.

1 Level

Fig. 8-3 Auxiliary screen

There are 5 basic menus available for selection, programming and diagnostic
options which are visible in the display headline. These menus can be accessed
via the arrow buttons >left< or >right<.

available, error messages. Furthermore it is possible to set the time
of 24 h-totalizing and to reset the daily totalizer.

plete parameter setting of dimensions of the measurement place,
sensors, analog and digital inputs and outputs and regulator func­tion, damping and system reset.

OCM F. All current values can be displayed, as well as the values
of analog and digital outputs and relays. Additionally it is possible to
indicate the current flow velocity as well as the flow velocity distri­bution.

tion of analog outputs as well as simulation of analog and digital
outputs and calculated volumes is possible too.

units, decimal digits, system times and totalizer pre-sets.

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navigates downward in the respective submenu (e.g. PAR/
press once ; toggle between indication mode and overview menu

press once ; toggle between indication mode and overview menu

delete values

press once; toggle from RUN menu to overview menu

8.5 Operation Basics

The entire operation of the OCM F is menu driven.
To navigate within the menu structure use the 4 control keys (see chapter 8.3).

>up<

- navigates upward in the respective submenu (e.g.

PAR/measurement place/name)

- select pre-set values e.g. units (m, cm, l/s, m³/s etc.)

- increase values

>down<

>left<

>right<

>ESC<

>ENTER<

-

measurement place/name)

- select pre-set values e.g. units (m, cm, l/s, m³/s etc.)

- decrease values,

- set decimal point

-

(main menu)

- jump across in main or submenu

- jump across between identical measurement values (e.g. span of

analog outputs 1 – 3)

-

(main menu)

- jump across in main or submenu

- jump across between identical measurement values (e.g. span of

analog outputs 1 – 3)

-

- each key action in menu  jumps back one level until

RUN menu

-

(main menu)

- activate a submenu

- accept and store values, units and so on

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9 Parameter Setting

9.1 Basics

The transmitter in the background operates with the settings which have been
entered at the beginning of the parameter setting. The system will not ask to ac­cept the modifications before the settings or modifications have been finished.
Enter the PIN below in order to accept modifications.

Never give the PIN code to any unauthorised persons. Even do not l eave the
code next to the equipment or write it down on it. The code number protects
against unauthorized access.

The unit will accept modified parameters if entered correctly performing a re­start subsequently. The OCM F is ready for operation after approx. 20-30 sec­onds.

It is possible to save modified parameters at the end of the parameter setting
procedure.
Entered parameters may be saved at the end of the setting procedure (>accept
changes<) or rejected by pressing >cancel<. It is also 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.

2718

OCM F

type in 2718 if prompted.

Fig. 9-1 Screen on end of parameter setti n g

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

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Day values

Please select submenu >Info<. This menu contains the total flow values of the

9.2 Operation Mode (RUN)

After mounting and installing sensor and transmitter (see previous chapters) ac­tivate the power supply.
On initial start-up the unit will prompt the language selection:

Fig. 9-2 Language selection

Select the desired language with the >up< or >down arrow keys< and confirm
with >ENTER<.

This menu is a display menu for saved day totals and error messages. Contain­ing the following submenus, it is not required for parameter setting:

Fig. 9-3 Operation mode selection

past 7 days (see Fig. 9-4).
Presumed the transmitter was operated without any interruption in the past
seven days. Otherwise it shows the total for the uninterrupted days of opera­tion.
Only the first 3 days will be indicated after selecting. Browse to other days by
using the arrow key >down<.
The oldest day total will be overwritten as soon as the 24h-total of the 8. day
has been created des (circular memory function).
The flow totals of 24 hours will be indicated. Totalization normally is carried out
at 00:00 h (midnight). If desired, this value can be modified under RUN – day
values - cycle (see Fig. 9-5).

Additionally, you can erase all day counters under >erase counter<. Due to
safety reasons it is required to enter the PIN >2718< and confirmation with
ENTER after erasing.

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2 Day values

3 Current day with cumulated total

4 24 h-day totals

5 Date

2 programmable time of future totalising in <hours : minutes : seconds>

Error messages

This menu is to monitor any interruptions in the unit function. Errors are go-ing

1 Time of day totalising

Fig. 9-4 Day values

1 current time of day totalising

Fig. 9-5 Time of day totalising

If the transmitter is disconnected from mains at the time of totalising set, it is
not possible to create or to save a total for the respective day.

If the unit has been shut down temporarily within 24 hrs. the flow rate missed
during the inoperative period is not going to be considered for totalising. There
will be no averaging interpolated replacing the lost flow rate!

to be saved and ordered by type of error, date and time.
Selecting the menu will always indicate the latest/last error message. Browse
through error messages using the keys >left< and >right<.
Pressing the >ENTER<-key will delete all error messages one by one.
The maximum number of stored error messages is limited to 10. The oldest of
11 error messages will be overwritten as soon as saved old error messages
are not going to be erased (circular memory function).
Following error messages are possible:

- “Doppler-Sensor“ - at interruption of the sensor communication or with de-

fective KDA sensor

- "external level “ – at interruption of communication to external level meas-

urement or if value falls below the limit of 3.5 mA

- "external level short-circuit“ – in case of exceeding the input signal 20 mA

- "temperature“ – in case of exceeding maximum or minimum permissible

temperature ranges by +/-10 °C (as from -30 or +60 °C) or if the temperature
sensor should be defect

- “ext. set point“ – if external set point is not available

- “control unit“ – in case of error of the control unit ("Valve OPEN", "Valve

CLOSED", "Valve TORQUE")

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2 Number of stored error messages

3 Time of error message

4 Date of error message

5 Type of error / error message

1 Error number

Fig. 9-6 Error message

Remaining errors are NOT going to be written into the error memory anew if
once they have been deleted. As soon as the error occurs repeatedly (or if the
power supply has been interrupted for a short period) the same error will be
saved into the error memory again.

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Info

This point provides comprehensive information on unit type, transmitter serial

9.3 Display Menu (EXTRA)

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

Fig. 9-7 Extra-submenus

Due to reasons of limited space it is not possible to indicate the entire menu on
the display. This can be seen from the black scroll bar on the right-hand side of
the display.

Scroll through the menu using the up and down keys.

OCM F

no. and software version (see Fig. 9-8). The menu is subdivided into 4 pages.
Pressing the arrow buttons >left< or >right< will take you through the pages.
Among other information these pages contain information on last parameter
setting / parameter change as well as mains power failure which might have
been occurred.

Fig. 9-8 System information

Fig. 9-9 Additional system information

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Unit system

Here you can select between indication and calculation. Select from: metric

Units

This menu contains the following sub menus:

Format

Choose display formats for velocity and totals here.

Language

Select from German, English, French or Polish.

Display

Allows to adjust display settings regarding contrast. Use >down< to de-

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

Fig. 9-10 Selecting the unit system

- Flow rate

- Velocity

- Level

- Total

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

Fig. 9-11 Selecting the units

The position of the decimal point can be defined as displayed in Fig. 9-12. The
unit automatically determines the decimal digit position of the current flow rate
indication and hence cannot be set to a fixed position.

Fig. 9-12 Selecting the display format

crease; and >up< to increase values in 5 %-steps.
The display contrast can be adjusted on the main page of the menu as well.

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System time

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

Totalizer

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

internal 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. 9-13 system time - submenus

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

Fig. 9-14 complete system time

This menu point is for indicating purposes only. Hence the system time can-not
be adjusted here. Modifications can be carried out in the individual menus >set
date< and >set time< (Fig. 9-13). Select between 12 h or 24 h mode in >set for­mat< submenu.

feature is normally used when replacing a transmitter which has to indicate the
same value as before replacement.
After the new value has been set confirm using the "Enter“-key and type in the
PIN “2718“. (2 faulty entries allowed). Otherwise the modified value will not be
accepted.

Fig. 9-15 Totalizer modification

Fig. 9-16 PIN-Code request

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Name

NIVUS recommends to coordinate and to define names according to names

9.4 Parameter Menu (PAR)

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

− Channel shape

− Channel dimensions

− Sensor types

− 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.
(Regulator mode or for special hydraulic applications). These settings are nor­mally made with the help of our service personnel or by an authorised ex-pert
company.
The parameter menu >PAR< includes eight partially very extensive submenus
which are described individually on the following pages.

9.4.1 Parameter Menu „Measurement Place“

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-known PC applications, this is readily identifiable from the black
bars on the right-hand side of the screen.

stated in the respective documents. Names may contain up to 15 letters.
After the submenu >Name< has been selected the basic setting „NIVUS“ will
come up. There is a cursor blinking below the first digit.

Fig. 9-17 submenu – name

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

Underneath the measurement place name you can find a table with 20 lines con­taining all uppercase and lowercase letters as well as a large number of special
characters (see Fig. 9-18). Use the arrow keys >up< and >down< to jump across
2 lines up or down at each key action.

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2 Selected character

3 Selection list

Channel shape

You can select between following standard profiles according to ATV A110:

To complete the name of the measurement place use the four arrow keys and
confirm your selection with >ENTER<. The cursor subsequently will jump one
digit to the right enabling you to choose the next character.
Delete unused characters by entering space. By pressing the both keys >right<
+ >down< or + >up< you can move the cursor to the right. Using the keys >left<
+ >down< or + >up< will move the cursor to the left.

1 Current name (of the measurement place)

Fig. 9-18 Setting the name (of the measurement place)

You can obtain the same movements as well if you move the cursor to the
rightmost or leftmost edge of the table by using >left< or >right<. As soon as the
cursor has reached the rightmost or leftmost edge of the table it will jump to the
desired position by one step on pressing >left< or >right< again.
Exit this part of the program with ESC. Decide to accept the new name, to cor­rect the new name (= Back) or to abort the procedure subsequently
(see Fig. 9-19).

Fig. 9-19 Accepting the new name

(dimensions to be entered in brackets)

- Round pipe (diameter)

- 3er egg (diameter)

- rectangle (channel height and width)

- u-profile (channel height and radius)

- trapezoid (channel height, trapeze width bottom/top, trapeze

height)

- custom shape h / A

- custom shape h / b

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Channel dimensions

Type in the respective channel dimensions depending on the profile chosen

Fig. 9-20 Channel shape selection

Select channel shape with >Up< and >Down< keys.

Confirm selection with >Enter<.

The selected profile will be indicated in the bottom line of the display.

Fig. 9-21 Selected profile screen

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

Confirm with >Enter<.

After having >custom shape< selected, first choose >channel dimensions<.

before.

Please observe indicated units!

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

Fig. 9-22 List of breakpoints for >Custom shape<

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Sludge level

The sludge level set is going to be calculated as non-moving channel sub-area

Low-flow volume

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

In order to define the zero point of the channel start by entering 0 – 0 in break­point 1. All further breakpoint can be set freely regarding height as well as
width/area.
There may be different distances between individual level points. Furthermore it
is not required to use all of the 32 breakpoints possible. The OCM F however is
going to use a linearization function between the breakpoints. Decrease the dis­tance between breakpoints in case of heavy and irregular fluctuation within the
area.

Fig. 9-23 breakpoints for >Custom shape<

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

Q

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 therefore have positive as well as negative effects.

min

be 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 Qmin.
Flow velocities below this value will be set to „0“ which will set the calculated
volume to „0“ as well.
Only positive values are allowed to be set. These values are going to be con­sidered as absolute values and therefore affect positive as well as negative
velocities!
Both setting options of low-flow suppression have an OR relation between
each other.

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9.4.2 Parameter Menu “Level“

Fig. 9-24 Selection low-flow volumes

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

Fig. 9-25 Menu level measurement

This menu defines any parameter regarding level measurement. The start
screen depicted below as well as the parameters to be set may vary depending
on the sensor type selected.

Fig. 9-26 Example in case of external level sensor

Basically determine the sensor type first (see Fig. 9-27).

Fig. 9-27 Determine the sensor type

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Sensor type

No.

Pressure trans.

01

Level measurement by a KDA combi sensor which is directly

Constant level

02

Use this point to set parameters for constantly full filled pipes and chan-

ext. Sensor

03

In this case the level is measured by using external transmitters such

connected to OCM F according Fig. 7-5.
Offset installation e.g. due to sedimentation or high dirt load is possible.
Level measurement in case of flooding is possible as well.

1 Sedimentation or soiling

Fig. 9-28 Sensor type 1: Pressure int.

nels. Such applications normally do not require level measurements.
The constant filling level must be set under >value< and is used for flow
calculation. This parameter is helpful too at initial start-up or in case of
performing tests without having level values available.

Fig. 9-29 Sensor type 2: Constant level

Type NivuMaster with echo sounder or an external 2-wire sensor such
as NivuCompact (non-Ex) or i-Series sensor for Ex-Zone 1. Connect as
shown in

Fig. 7-8, Fig. 7-11 or i-Series connection plan Fig. 7-9.

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ext. Sensor (Ex)

04

Level measurement by external Ex 2-wire sensor supplied by OCM F

Mounting height

Only visible, if sensor type no. 1 is selected. This value is set to 5 mm

Fig. 9-30 Sensor type3: 22 wire probe

e.g. a pressure probe, type NivuBar Plus or echo sounder type Nivu­Compact). Connect as described in Fig. 7-10.

Fig. 9-31 Sensor type 4: 2-wire probe Ex

Please select the appropriate level measurement method prior to planning the
facility.

The transmitter will access only the clamps which have been programmed in
the menu!

Due to this reason please observe correct sensor connection
(see chapter 7.4.2)

(0.19 in) as KDA combi sensors in standard, which is the position of the dia­phragm above the channel bottom. There is no need to modify this value
unless the sensor is going to be installed higher or lower. If installed higher
(on a block or similar) enter 5 mm (0.19 in) plus additional height, if installed
lower subtract from 5 mm (0.19 in) and enter the total height.

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Value

Enter a fixed value for the level here. Only visible, if sensor type no. 2 is se-

Measurement range

Select between measurement ranges 4-20 mA or 0-20 mA. Only visible,

Value at 0 mA

Enter a level value for 0 mA here.

Value at 4 mA

Enter a level value for 4 mA here.

Value at 20 mA

Enter a level value for 20 mA here.

Offset

This entry will move the zero point of the external sensor. Only visible, if sen-

Damping

This value is to damp a fluctuating signal of an external level measurement.

i-3

i-6

i-10

i-15

lected. This value is set to 0.1 m (3.9 in) as standard.

if sensor type no. 3 is selected.

Only visible if 0-20 mA has been selected as measurement range for sensor
type no. 3. This value is set to 0 m (0.0 in) as standard.

Only visible, if sensor type no. 3 or 4 is selected.
This value is set to 0 m (0.0 in) as standard.

Only visible, if sensor type no. 3 or 4 is selected.
This value is set to 4 m (13.1 ft) as standard.

sor type no. 3 or 4 is selected. This value is set to 0 m (0.0 in) as standard.

Only visible, if sensor type no. 3 or 4 is selected.
This value is set to 0 s as standard and can be set to up to 10 s.

9.4.3 Information on how to connect i-Series sensors

The i-Series sensors feature pre-programmed measurement ranges. Please
refer to the according instruction manual. The sensor can be operated even
without HART modem.

Setting the parameter "Value at 20 mA" requires to enter the measurement
span of the sensor. Depending on the installation height of the sensor a nega­tive offset value may be additionally necessary.

4 mA (empty) 0% span

Distance to sensor face in m

20 mA (full) 100% span
Distance to sensor face in m

Measurement span
(value at 20 mA)

Fig. 9-32 i-Series sensors measurement range

3.0 6.0 10.0 15.0

0.125 0.300 0.300 0.500

2.875 5.7 9.7 14.5

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Sensor type

Select between wedge or pipe sensor. The standard setting is wedge sensor.

Mounting height

This menu point is to modify the installation height of the flow velocity sensor.

Install. direction

Installation direction is set to “positive“ per default. This parameter should not

9.4.4 Parameter Menu „Flow Velocity“

Fig. 9-33 Sensor settings

The standard setting is 15 mm (0.59 in) which is equivalent to the position of
the sensor centre above the channel bottom. This setting does not need to be
modified unless the sensor has been installed higher or lower. If the sensor
has been installed higher enter the additional mounting height plus 15 mm
(0.59 in) and modify parameter “h-crit” (see Chap. 9.6.2) additionally, if in­stalled lower subtract the missing height from 15 mm (0.59 in) and enter
overall height.
Never countersink flow velocity sensors without pressure measurement cell
deeper than 8 mm into the channel bottom (see "Installation Instruction for
Correlation and Doppler Sensors")!

Never countersink flow velocity sensors with integrated pressure measure­ment cell into the channel bottom!!!

Otherwise the measurement might fail!

be modified. It is going to be used only for special applications where the flow
velocity sensor is heading upstream (unlike heading 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.

9.4.5 Parameter Menu „Digital Inputs“

Fig. 9-34 Digital inputs – submenu

Select from digital inputs 1 – 4 using the >left< or >right< arrow keys as long as
the regulator function is active. This section enables to set and the digital input
signals „switch OPEN“, „switch CLOSE“ and „torque switch“.
The OCM F requires these inputs for regulator operation.
The function >Stop v-measurement< is exclusively available for digital input 4.

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Function

Each digital input chosen by pressing >left< or >right< will be assigned to a

Logic

Toggle between inverse and non-inverse input by pressing >up< or >down<

Name

The name of a digital input can have up to 3 characters. These names will be

Fig. 9-35 Digital inputs functions

certain function as long as the regulator function is active.
Select from:

- „inactive“ (The digital input has no function.)

- DI1 „torque switch“ (the torque switch for the closed condition is connect-

ed to the selected digital input.)

- DI2 „switch CLOSE“ (the slide end switch for closed condition is routed to

the selected digital input.)

- DI3 „switch OPEN“ (he slide end switch for open condition is wired to the

selected digital input.)

- DI4 „control v-measure“ (he digital input is used to block/release the

measurement using an external signal such as flood messages or limit val­ues for measurement start or similar. Indicated as: 0 l/s, inputs and outputs
set will de-energise)

arrow keys. This means that e.g. slide valve signals can be configured as be­ing normally closed and cable breaks can be detected without any problem.
The default setting is „non-inverse“.

indicated in the main screen and in overview menu; see overview menu. Set
the names as described in chapter

Please observe that the digital inputs are passive and therefore shall be sup­plied by an external 24 V DC power supply!
The signal current is 10 mA. Please ensure reliable conductivity by using relay
or end switch contacts made of high quality material.

9.4.1.

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Function

The selected analog output is going to be assigned to a function.

2 Start measurement

3 Stop measurement (obstruction, standing water or no water etc.)

9.4.6 Parameter Menu “Analog Outputs“

Fig. 9-36 Menü Analogausgang

Innerhalb dieses Menüs kann zwischen den Analogausgängen 1-3 mit den Pfeil­tasten >rechts< oder >links< gewählt werden.

Select from various functions:

- Not active (no analog signal output)

- Flow rate (output of analog signal which is proportional to calculated flow

volume)

- Level (output of analog signal which is proportional to measured filling level)

- Velocity (output of analog signal which is proportional to mean flow velocity

averaged from measured individual velocities)

- Temperature (output of measured water temperature as analog signal)

- Constant current (calculates from the ratio between valid readings to total

readings resulting from velocity measurement, output as analog signal). This
function is not conceived for control purposes, but for monitoring, remote
analysis and for determination of sensor cleaning intervals.

1 Analog output

Fig. 9-37 Analog output signal quality

The Fig. 9-37 signal quality shows the analog output signal if the signal quality
has been programmed. The signal will steeply rise at the beginning of the meas­urement (2).
The signal is damped in order to avoid heavy signal fluctuation.

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Span

After having a function selected (flow, level, velocity, signal quality or tempera-

Value at 0 mA

Enter the measurement value at 0 m.

Value at 4 mA

Enter the measurement value at 4 mA.

Value at 20 mA

Enter the measurement value at 20 mA.

Error mode

If this parameter has been enabled it is possible to set the analog output to a

As soon as e.g. the sensor is going to be removed from the medium or no ve­locity can be measured at all (3), the signal first slopes gently getting steeper
subsequently.

After selecting >Function< it is possible to set “span“, “value at 0/4” or 20 mA
and “error mode” for flow, filling level, velocity, temperature or signal quality (see
Fig. 9-38).

Constant current (the analog output can be set to output a constant current
which is independent from any readings). After choosing the function a new win­dow comes up in order to enter the desired initial current value (max.

20.475 mA, see Fig. 9-39).

Fig. 9-38 Selection flow

Fig. 9-39 Selection constant current

ture) toggle between measurement ranges of 0-20 mA or 4-20 mA here.

Example:
A measurement place is partially tending to backwater formation. Negative
values shall be recorded as well; the following recording or process conducting
system however has only one analog input left available. In this case the ana­log output signal is set to have a "floating” behaviour.
This means that flow = 0 is going to output the 12 mA analog signal:
4 mA = -100 l/s
20 mA = 100 l/s
Backwater will cause the analog signal to decrease, positive flow will cause
the signal to increase.

defined value in case of error. After activation the points “Error input mask” as
well as “Value at errors” can be selected (see

Fig. 9-40).

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Error input mask

This point is accessible only if error mode has been activated. Output signals

Value at errors

Visible only if error mode has been enabled. This parameter is to define the

can be assigned to the respective error here. Available are Doppler-sensor,
external level, temperature, external set point input and slide valve. Velocity is
currently not yet available.
Choose the desired function with the >up< or >down< arrow keys and confirm
by pressing ENTER. A tick will appear as soon as the function has been con­firmed. Pressing ENTER once more will deactivate the function again. Leave
this point by pressing ESC, see Fig. 9-41
All errors will be saved in the error memory (see Chap. 9.2 section “Error mes­sages”).

Fig. 9-40 Extended submenu analog output

Fig. 9-41 Error input mask

desired analog output condition if an error should occur (see also Fig. 9-42)
The following functions are available:

- hold last value (holds the last value prior to error)

- constant 0.0 mA

- constant 3.6 mA

- constant 4.0 mA

- constant 20.457 mA

Fig. 9-42 Programming error output

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Limit flow rate

Relay will energise if a flow limit value (to be set) has been exceeded and will

Limit level

Relay will energise if a level limit value (to be set) has been exceeded and will

Limit velocity

Relay will energise if a velocity limit value (to be set) has been exceeded and

Limit temperature

Relay will energise if a temperature limit value (to be set) has been exceeded

Volume impulse pos.

Relay will output volume-proportional impulses if the flow direction is positive.

Volume impulse neg.

Relay will output volume-proportional impulses if the flow direction is negative

Error signalling

Error message output via relay. >Error input screen< can be selected as soon

Error input screen

It is possible to assign the relay output to the respective error here.

9.4.7 Parameter Menu "Digital outputs“

Fig. 9-43 Relay selection menu

This menu allows to select between relays 1-5 using the >right< or >left< arrow
keys.

Relays 4 (close slide valve) and 5 (open slide valve) are dedicated to regulator
functions if the regulator has been enabled. It is not possible to modify this
assignment!

Select parameter “relay function” to indicate available functions.

OCM F

Fig. 9-44 Relay outputs – submenu

de-energise if flow falls below a second limit value (to be set).

de-energise if level falls below a second limit value ( to be set).

will de-energise if velocity falls below a second limit (value to be set).

and will de-energise if medium temperature falls below a second limit (value to
be set).

Weighting and impulse duration are free programmable

(= backwater). Weighting and impulse duration are free programmable.

as this parameter has been activated.

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The choices are:

Switching mode

It is possible to select between >normally open< and >normally closed<.

Switch point on

Defines the “ON” point for the selected limit value. This value is required for all

Switch point off

Defines the “OFF” point for the selected limit value. This value is required for

Time delay on

The “ON” event in case of reaching the limit value can be delayed by up to

Doppler sensor, external fill level, temperature, external setpoint and slide
valve. The velocity is not available.
Choose the desired function with the >up< or >down< arrow keys and confirm
by pressing ENTER. A tick will appear as soon as the function has been con­firmed. Pressing ENTER once more will deactivate the function again, press­ing ESC will exit the menu (see also Fig. 9-45). All errors will be saved in the
error memory (see Chap 9.2 section “Error messages”)

Fig. 9-45 Error input mask

After the relay function has been defined (limit flow rate, limit level, limit velocity,
or limit temperature) another window will appear enabling to define the function
parameters depending on the function chosen. The respective parameters are
ON and OFF points, ON and OFF delays as well as modifications of the name
which might come into effect on the screen (see Fig. 9-46).

Fig. 9-46 Limit value parameter

The relay is going to energise if >normally open< has been selected and the
according value has been reached, if >normally close< has been selected the
relay will energise immediately after the parameter has been set and will de­energise as soon as the according value has been reached.

limit functions.

all limit functions.

9999 seconds max. The relay will not energise before the time set is expired
and the limit value is present yet.
If the value falls below the limit threshold for a moment the cycle will begin
anew.

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Time delay off

The “OFF” event in case of reaching the limit value can be delayed by up to

Name

The relay output name may consist of 3 characters max., which will be indicat-

Impulse duration

Set impulse duration from 0.1 to 1.0 seconds. The impulse-pause-ratio is 1:1;

Volume impulse

Defines the impulse value. The measured volume will be added internally until

9999 seconds max. The relay will not de-energise before the time set is ex­pired and the limit value is present yet. If the value falls below the limit thresh­old for a moment the cycle will begin anew.

ed in main menu and in overview menu. Set the name as described in Chap-

9.4.1.

ter.

If the impulse function has been selected the options below have the following
functions:

Fig. 9-47 Impulse parameters / impulse duration

the default setting is 0.5 seconds.
It is useful to extend impulse duration e.g. in case of using slow SPS (PLC)

inputs or sluggish mechanic counters.

the value set has been reached (e.g. 1 m³). Then an impulse signal with the
duration set will be output and the internal counter will be set to 0 again. The
course of events will repeat again subsequently.

9.4.8 Parameter Menu “Control Unit“

Fig. 9-48 Control unit basic settings

This menu allows you to adjust the transmitter to almost any waste water ap­plication for optimum performance. It enables to execute slide valve and torque
monitoring as well as quick close control or automatic flush functions. The digital
inputs >PATH OFF<, >PATH ON< and >TORQUE CLOSED< have to be acti­vated for the control unit to operate.
You can find more comprehensive information on setup and functional principle
in chapter 7.7 Regulator Mode.

It is absolutely necessary to have sound knowledge on control technology to
correctly and safely set the regulator!

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Non active

The function is disabled.

Internal set point

The set point is determined in the OCM F.

External set point

The set point is pre-set externally using the dedicated analog input 2. This can

Input range

Measurement range selection of external set point between 4-20 and 0-20 mA.

Value at 0/4 mA

The flow values can be set to 0/4 mA.

Value at 20 mA

Flow values for 20 mA can be entered here.

Int. Set point

This parameter is to determine the internal flow set point in l/s.

Min. variation

This parameter defines the permissible setpoint deviation of the control sys-

Cycle time

The processing interval of the controller.

active

active

be accomplished e.g. by using a process conducting system.
It is recommended to always set the “internal set point” since the system will
switch to internal automatically as soon as the external set point 4-20 mA fails.

Fig. 9-49 Setting the external setpoint

Linearization of set point input: set point start is at 0/4 mA, set point end is at
20 mA.

Fig. 9-50 Control unit settings

tem without a regulating event is allowed to be executed.
The setting reduces the oscillation tendency of the system. If there is no set­point deviation tolerance defined, the system will constantly attempt to exactly
adjust the actual value according to the setpoint. Due to this reason the regu­lating unit might be driven permanently which may result in mechanical defects
or higher wear and tear. Normally the deviation should be approx. 10 % of the
setpoint value.

Short intervals will accelerate the control behaviour, but are going to result in
oscillation of the control circuit as from a certain point. A long interval is going
to reduce the oscillation tendency of the controller but will however increase
inertia of the regulating system.

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average flow velocity

distance between regulating unit and measurement

Slide valve run

Use this parameter to monitor spindle breaks, slide valve gate breaks, gear

the end switch CLOSED after the slide run time has expired

Min. pulse time

This parameter can be considered as quite similar to the I-component of

Max. pulse time

This parameter defines the maximum control impulse duration of the regulating

P-Factor

The proportionality factor indicates, to which degree the regulating time is go-

Quick close function:

Guideline:

time/shifter time

Interval =

defects, power failures on the regulating unit or other malfunction sources
which may reveal because the regulating unit does not move although control
signals are being generated.

An error message is going to be generated if the controller unit does not reach

(see Chap. 9.2 sub item “Error messages“)

Guideline:

Slide run time to be set = time between open and closed condition of slide valve

during permanent operation • 1,2 ......2,0.

(the longer the slide run time the lower the factor)

The slide run time has an effect similar to the P-factor and has to be set!
There will be no error message generated e.g. in case of a broken spindle if

the slide run time has not been set!

• 1,3

PID controllers. It defines a minimum regulating time of a regulating unit in or­der to ensure that calculated very short control impulses mechanically affect
the regulating unit at all. Hence the minimum control impulse duration should
be specified longer than motor start-up time + gear clearance + slide valve
clearance. If 0 has been set an impulse duration of 0.25 seconds will be used.

unit. This allows to limit the slider run time. The maximum control impulse du­ration should be shorter than the cycle time.

ing to be affected in case of a deviation ∆ w from setpoint w. The higher the
proportionality factor, the longer the regulating time of the slide valve at the
same control deviation..

The quick close function is used if certain conditions such as large diameters,
long slide valve run times and long dead times of the measurement section are
given. In case of sudden rainfall events this function will partially close the
open slide valve independent of the calculated regulating time.
During permanent operation this is going to be executed without any run time
interruption. This function requires “h, Q and t-quick close” to be set.

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h-quick close

h-quick close acts as OR-parameter related to Q-quick close. This parameter

Q-quick close

Q-quick close acts as OR-parameter related to h-quick close. This parameter

t-quick close

t-quick close is the time the regulating unit needs to move from open condition

t of Pos. “CLOSED“

This period is for error cases, e.g. interrupted sensor communication or defect

Time delay

This is the time to elapse before the position control comes into effect in case

System reset

Enables a general reset of the measurement transmitter. Entering the PIN-

defines the desired maximum flow level of the medium. “t-quick close” will be
activated as soon as this value has been reached. Depending on application,
this parameter shall be set approx. 60-80 % higher than the setpoint. Before
setting this parameter please observe waves at the measurement place as
well as the unit’s regulating deviation.

defines the desired maximum flow rate of the medium. “t-quick close” will be
activated as soon as this value has been reached. Depending on application;
this parameter shall be set approx. 10-50 % higher than the condition which
makes the system go to regulator mode during dry weather operation. Before
setting this parameter please observe the unit setpoint deviation tolerance.

(end switch: PATH ON) to the position it has whilst being in normal regulator
mode. “h-“ or “Q-quick close” are the conditions for “t-quick close” to switch.

sensor. In this case the regulating unit goes to closed condition (end switch:
PATH OFF) before it opens again for the period set in this parameter t of Pos.
“CLOSED“.

of errors. The adjustable range is 0-240 seconds.

9.4.9 Parameter Menu „Setup Parameter“

WARNING

Data loss due to system reset

Selecting >system reset< is going to reset the system to the basic parameter
settings. The default settings are going to be restored and all customer modifi­cations will be set to default condition (system general reset).

Fig. 9-51 Setup parameter – submenu

This menu allows to modify measurement and output damping, to reset the sys­tem to default condition as well as to modify special settings by using the service
code.

Codes >2718< will cause the OCM F to execute a general reset. The unit will
be in initialising mode subsequently which requires the operation language to
be set.

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Service mode

Additional system setting options are going to be revealed as soon as a spe-

Damping

Allows to adjust indication and analog output damping between 20 and 200

Stability

It is recommended to increase stability in case of irregular measurement drops

Fig. 9-52 New program start OCM F

Fig. 9-53 Choose language

The OCM F will now overwrite the flash memory restarting the program. Before
restart the unit briefly indicates unit ID (see Fig. 9-52). Subsequently the desired
language can be selected (see Fig. 9-53) and the unit will return to factory de­fault condition.

cial code has been entered. This parameter is reserved for NIVUS service
personnel as the settings require comprehensive expert knowledge and are
not needed for common applications.

seconds. This means that if the calculated volume jumps from 0 to 100 % the
system will need the time set here to indicate and to output this jump.

due to poor hydraulic conditions..

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9.5 Signal Input-/Output Menu (I/O)

This menu includes several submenus which both serve to assess and to check
sensors as well as to control signal inputs and outputs. It allows to indicate vari­ous values (current values of inputs and outputs, relay conditions, distribution of
frequency groups etc.), however does not enable to influence signals or condi­tions (offset, adjustment, simulation or similar). The menu therefore primarily
serves in order to assess the parameter settings and for error diagnosis.

Fig. 9-54 I/O Menu

9.5.1 I/O Menu “Digital Inputs”

Digital input values routed to the transmitter input clamps can be viewed here.
Select from either logically "OFF“ or "ON“.

Fig. 9-55 Screen digital values

9.5.2 I/O Menu “Analog Outputs”

This menu indicates the calculated values which have to be sent to the analog
converter as mA signals.

Fig. 9-56 Screen analog values

The actual current on the output clamps will not be displayed. The only signal
visible is the one the analog output converter is receiving for output purposes.

External faulty wiring neither can be detected nor indicated in this menu.

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v = Measured flow velocity

A = Calculated area

Q = Calculated flow rate

t = Measured temperature

q = Quality of velocity measurement (damped)

9.5.3 I/O Menu „Digital Outputs”

Conditions which are calculated by the transmitter and routed to the relay for
output purposes subsequently can be viewed here. Select from either logically
"OFF“ or "ON.

Fig. 9-57 Screen digital values

The actual output condition of the relay contacts on the output clamps will not
be displayed. The only signal visible is the one the relay is receiving for output
purposes.

External faulty wiring neither can be detected nor indicated in this menu.

9.5.4 I/O Menu „Measurement Data”

OCM F

This menu is to recall current readings at a glance.

h = Measured level

Fig. 9-58 Screen measurement data

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2 Creation date of sensor firmware

3 Quality of velocity measurement

4 Calculated average flow velocity

5 Height measured by pressure sensor

6 Measured medium temperature

7 Velocity of sound resulting from medium temperature

8 Amplification mode of sensor

9 Amplification value of sensor

2 = frequency group (peak)

3= Measurement frequency

4= Currently measured flow velocity

5= invalid values

9.5.5 I/O Menu “Sensor-Info”

This menu is to indicate various information regarding the sensor and is mainly
for service purposes.

1 Firmware version of sensor

Fig. 9-59 Status of sensors and velocity evaluation

9.5.6 I/O-Menu „v-Histogram”

The frequency histogram indicates the spreading of the investigated Doppler
frequency. Each bar (peak) represents a frequency group.
This is particularly important to assess and to choose measurement places as
well as to find a place for sensor installation.

1 = Quality of velocity measurement

Fig. 9-60 Distribution of frequency groups

The measurement quality (0-100 %) indicates the relation between the evaluat­ed Doppler frequency and the entire frequency spectrum measured. The higher
the quality, the more reliable the indicated flow velocity reading. There are no
limit values for the quality (Q) since the shape of the frequency distribution has
to be considered additionally. This shape is more important for hydraulic as­sessment than „q“.

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There are cases where, despite comparatively high quality values, it is not
possible to correctly investigate the flow velocity reading due to poor frequen­cy group distribution. In such cases install the flow velocity sensor in another
place. See „Installation Instruction for Correlation and Doppler Sensors “.

Quality = very good

Frequency distribution = very good

Quality = satisfactory

Frequency distribution = satisfactory

Quality = very good

Frequency distribution = poor

Fig. 9-61 Flow velocity profiles

Quality = good

Frequency distribution = good

Quality = none

Frequency distribution = none

Quality = poor

Frequency distribution = satisfactory

9.5.7 I/O Menu “External Level“

This menu is visible only if external level measurement is enabled. Here the pre­vailing currents on analog input 1 and the height of the external level measure­ment are indicated.

Fig. 9-62 External level selection

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2 Set point of regulator

3 Difference between Q

and Q

4 Regulator status: Normal, Quick close, Idle, Error

5 Current regulating time calculated from „Qdff” in sec./4

6 Time in seconds how long activated relay remains energised

7 Remaining cycle time

8 Status of three digital inputs

9 Status of both relays

2 time in seconds how long activated relay remains energised manually

3 status of three digital inputs

4 status of both relays

9.5.8 I/O Menu “Control Unit”

This menu is visible only if the controller has been enabled in the PAR menu.
Having the controller enabled will bring up the screen below:

1 Currently measured flow rate

act

Fig. 9-63 Control unit selection

9.5.9 I/O Menu “Test control unit – manual mode”

DANGER

Caution – Danger of injury!

The manual controller operation directly will access any following facility areas
without any safety locking measures! This might result in personal injuries!

Manual operation is for test purposes exclusively!
Safety precautions must be taken!

This menu is visible only if the controller has been enabled. The slide valve can
be manually opened and closed for testing purposes. The arrow keys >up< and
>down< serve as manual control elements.

set

1 currently measured flow rate

Fig. 9-64 Control menu for test control unit

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9.6 Calibration and Calculation Menu (CAL)

This menu is to adjust the level measurement, to adapt flow velocity and analog
outputs to following systems and to simulate relay switching events and analog
outputs.

Fig. 9-65 CAL- menu selection

9.6.1 CAL Menu “Level“

This menu allows to adjust level measurements.
Values from -1000 mm to +1000 mm (39.4 in) can be entered. This adjustment
is required only if the level measurement utilises a pressure measurement cell.

OCM F

Fig. 9-66 Submenu - level

Due to physical reasons the pressure measurement cell is subject to zero
point drift. It is recommended to adjust the pressure sensor to the zero point
regularly (recommended interval: 6 months).

Required values have to be investigated with the sensor being removed if
possible or if the water level is as low as possible. The correct filling level has
to be investigated as accurate as possible before adjusting by using another
suitable measurement method (value = 0 if the sensor has been removed from
the medium).

Enter the investigated value as reference.

Investigating the zero point of the pressure measurement cell is often carried
out by measuring the current filling level with a yardstick, a ruler or similar
without removing the sensor. After the ruler or similar has been held into the
medium, the respective reading is entered as reference value.

This is why the filling level for reference measurement purposes has to be
measured always from top down (see Fig. 12-1).

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min. velocity

Defines the minimum flow velocity measurement range the OCM F shall

max. velocity

Defines the maximum flow velocity measurement range the OCM F shall

Calibration factor

Here the calibration factor can be modified. The calibration factor is multiplied

h-crit.

Measuring the flow velocity is no longer possible as soon as the level falls be-

h_crit min

The flow velocity will not be calculated below "h_crit min“ and hence will be set

9.6.2 CAL Menu “Flow Velocity“

Fig. 9-67 Submenu – velocity

measure and process. It is set to -4 m/s per default. The minimum flow velocity
can be set to >0< if negative flow directions are not to be measured.

measure and process. It is set to 4 m/s per default.

It is not possible to measure and to output positive velocity if the maximum
value has been set to >0<!

It is not possible to measure and to output negative velocity if the minimum
value has been set to >0<!

by the measured flow velocity. The value is set to 1 per default.

low a certain level called h_crit.
The level h_crit is pre-determined by the construction of the sensor as well as
the measurement method and is set to 0.065 m (2.56 in) per default.
After initial start-up, the OCM operates using the start values found in the
Manning-Strickler table (CAL / Flow velocity / v-crit determination / Manning­Strickler) until it reaches the h-crit value set.
Going through a level range of 9-12 cm featuring a decreasing trend causes
the unit to determine an application coefficient (automatic activated).
Then the OCM under h-crit operates using the investigated application coeffi­cient.
In case of a raised sensor installation position enter + 0.065 m as installation
height here.
Example: enter 0.085 m under "h-crit“ in case of using a sensor installation
height of 0.02 m..

to >0<.

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2 h_crit min

3 Range of automatic Q/h relation

4 determination of application coefficient

Auto discharge curve

Depending on the selected setting, entered values are verified and corrected if

1 h-critical

Fig. 9-68 Flow velocity determination graph

necessary with the next measuring event (automatic >active<). Another option
is to permanently operate using the values entered in "Manning Strickler“,
"manual“ or "Assistant“ (automatic >inactive<).

Fig. 9-69 Defining v-crit

Note

Please avoid backwater up to levels of 0.012 m if Auto discharge curve is „ac­tive".

v-crit Determination

This menu is conceived to be used for commissioning at low filling levels lower
than 6.5 cm. There are three options to determine the flow velocity:

− Manning-Strickler (if slope and roughness are known)

− Manual (if a reference value can be determined)

− Assistant (if a minimum dam-up of 6.5 cm is possible)

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Slope

Enter the slope at measurement point in %

Strickler -coefficient

Enter the Manning - Strickler coefficient

Comprehensive expert knowledge is required to properly utilise these parame­ters. We therefore recommend the NIVUS commissioning service or a thor­ough device training.

Fig. 9-70 Selecting v-crit determination

Manning Strickler

The theoretical discharge curve is calculated using the settings under >Dimen­sions<, >Slope< and >Roughness<.
This function may be combined with the automatic mode. The theoretical set­tings within the flow velocity monitoring area (see Fig. 9-68, No. 4) will be veri­fied using this method.

Fig. 9-71 Manning Strickler v-crit determination

Please see Table „Manning - Strickler Coefficients“ in chapter 14 for more
information.

Manual

Enter the current level and the current flow velocity (measured using a refer­ence) directly. The theoretical discharge curve is calculated from these values.
This function may be combined with the automatic mode. The theoretical set­tings within the flow velocity monitoring area (see Fig. 9-68, No. 4) will be veri­fied using this method.

Fig. 9-72 Manually setting v-crit determination

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Assistant

The OCM guides through a menu using an artificial dam-up (e.g. using a sand­bag) to determine required characteristics. The theoretical discharge curve will
be generated automatically.
This function may be combined with the automatic mode. The theoretical set­tings within the flow velocity monitoring area (see Fig. 9-68, No. 4).
will be verified using this method.
First ensure free discharge, then start level measurement with >ENTER<.

Fig. 9-73 Assistant – start measuring v-crit determination

The OCM executes the first level measurement in free discharge. Measuring will
take 8 seconds.

Fig. 9-74 Measuring Countdown Assistant

After the first measuring, a dam-up of minimum 6.5 cm (12 cm are recom­mended) must be created behind the sensor by using a sandbag or similar.
The second level measurement in the dam-up cannot be started before
"h-actual“ shows stable values.

Fig. 9-75 Create dam-up – start measuring

The OCM will execute a new 8-second level measurement.

Fig. 9-76 Measuring countdown for the second measuring

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Adjustment

The 3 analog outputs can be adapted to following systems. Adjust between

The readings below will be indicated after the second measurement has been
finished:

− h_actual: actual level

− h: level before creating a dam-up

− v: measured flow velocity

− Q: investigated flow

Fig. 9-77 Assistant indicating investigated values

Pressing >ENTER< determines and subsequently enters an application coeffi­cient (factor) for the measurement point.

9.6.3 CAL Menu “Analog Outputs“

Basic Hints on Simulation:

DANGER

High risk potential during simulation

Due to the extremely high risk potential (direct access to following plant sec­tions) as well as incalculable effects due to poor or faulty simulation, NIVUS
herewith refuse to accept any responsibility for personal or material damages
of any kind in advance!

Simulations must be carried out by trained expert personnel exclusively!

-4 mA and 4 mA (see Fig. 9-78).
These values will be added to or subtracted from the analog outputs. Adjust­ment is not possible as soon as the analog output has been set to “Constant
value”.

Fig. 9-78 Adjustment of analog outputs

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Simulation

It is possible to simulate a free adjustable analog output current on the 3 ana-

WARING

WARING

Danger of injury!
The simulation of OCM F outputs will access any following facility areas with-

out any safety locking measures!

Simulations are allowed to be executed exclusively by NIVUS expert person­nel or by expert companies trained by NIVUS in cooperation with experienced
users. Be sure to always observe safety precautions!

Make sure to have a safety person available

The simulation of analog inputs and outputs is allowed to be carried out by
specialist electricians only who have sound knowledge on the control system
of the facility. This requires detailed preparation.

It is absolutely necessary to have a safety person available!
The following system must be set to manual operation mode. Actuators or

similar have to be disabled if possible or have to be functionally restricted in a
way not to cause any damage.

log outputs. Select the desired analog output with the >right< or >left< keys.
After entering the PIN code >2718< you can increase or decrease the mA val­ue in steps of 0.01 mA using the >up< or >down< keys during simulation. Fur­thermore it is possible to directly enter desired values to simulate by pressing
ENTER. A maximum output current of 20.475 mA can be simulated
(see Fig. 9-79).

Fig. 9-79 Simulation of analog outputs

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2 Simulated flow velocity

3 Simulated medium temperature

4 Calculated simulated flow value

5 Programmed relay activated by simulation

6 Analog output signals

9.6.4 CAL Menu „Digital outputs“

Selecting the >Digital outputs< menu requires to enter the PIN (2718) once
again. This ensures to prevent unauthorised persons from performing simula­tions during operation.
Choose the desired relays to be simulated by using the >up< and >down< arrow
keys. Use ENTER to either turn the chosen relay ON or OFF directly. The relays
will de-energise if you exit the menu
.

Fig. 9-80 Relay simulation

9.6.5 CAL Menu „Simulation“

After entering the PIN code >2718< select between level, velocity and medium
temperature by using the >up< and >down< arrow keys. Pressing >right< or
>left< will increase or decrease the simulated flow velocity or temperature value
in steps of 1 cm or 0.1 °C.
Using ENTER enables to enter the desired simulation value directly.
The flow value which has been calculated by means of the simulated readings
will be indicated on the bottom line of the screen. Relays which might have been
set will switch and programmed mA outputs supply according current values
simultaneously. Use >up< or >down< keys to indicate output values in the bot­tom line of the display.

1 Simulated height/level

Fig. 9-81 Simulation mode

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9.7 Parameter storage

Via the front-side USB interface, parameter can be either loaded or saved on PC
or Laptop using software tool „PaDa“. This tool is free and can be down-loaded
from www.nivus.com under >Download/Software<.
Connect the OCM F and PC/Laptop with an USB cable (Type A-B). The „Pa-Da“
software tool at present can be operated under Windows® XP, Vista and Win­dows® 7 (32-Bit version).

If a warning should be displayed during installation click the "Continue Any­way" button.

OCM F

PC or Laptop are not capable of detecting the OCM F transmitter however if
you select "STOP Installation" instead. In this case the software must be in­stalled again!

Fig. 9-82 PaDa Installation Warning

After the software has been installed successfully, run the tool under Win-

dows® XP either from „Start – All Programs - NIVUS GmbH“ or via the desk-

top icon (self-installed; German, English or French).

Fig. 9-83 PaDa English

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Load parameters

Downloads the complete current parameter settings of the transmitter from

Load modified pa-

Loads only parameters which have been modified in the unit (varying from de-

Send parameters to

Sends previously saved parameters ("PARAM. TXT“) to OCM F in case of acci-

Send modified pa-

Use this function to send modified parameters to the transmitter. The file name

Select the desired option using the >up< and >down< arrow keys and confirm
with the Enter key. The standard installation routine will install the software un­der Windows® XP in the C:\Programme\PaDa directory. Parameter sets will be
saved there as well. Read out or open parameters either with EXCEL or an ap­propriate editor application.

from device

rameters from device

device

rameters to device

OCM F to PC/Laptop creating a file named "PARAM.TXT“.

fault) using a file named "CHGPARAM. TXT“.

dental system reset, faulty modification of specific settings or device defects.
Synchronises the parameters between PC/Laptop and OCM F. Copy the de­sired parameters into the same directory as the "PaDa.exe“ before transmitting.

is "CHGPARAM. TXT“.

Do not close the tool window during data transmission! The window will close
automatically as soon as the transmission has been finished successfully!

In order to prevent data from being overwritten, move parameters which have
been read out before into a separate folder.

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Parameter Menu (RUN)

Parameter Menu (PAR) Part 1

RUN default

day values

info
cycle
erase counter

error mess ages

PAR default

measurement place

name NIVUS

profil

round pipe x

radius 0,45

3er egg

radius 0,225

rectangular

channel height 1
channel width 1

U-profil

channel height 1
radius 0,225

trapezoid

channel height 1
trapeze width bottom 1
trapeze width top 2
trapeze hight 1

custom shape h/A

channel dimensions

custom shape h/b

channel dimensions

10 Parameter tree

OCM F

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Parameter Menu (PAR) Part 2

default

Sludge level 0

Low-flow volume Qmin. 0

level

Low-flow volume Vmin 0

sensor type

pressure trans. x

mounting offset 0,005

constant level

value 0,1

external s ensor

range 4-20 mA
value at 0/4 mA 0
value at 20 mA 4
offset 0
damping 3

external s ensor (Ex )

velocity

digital input

value at 4 mA 0
value at 20 mA 4
offset 0
damping 3

sensor type wedge

mounting offset 0,015

mounting direction positive

function

DI 4 stop v-measurement

logic non-inverse
name D1

DI 1 torque switch

DI 2 switch "CLOSE"

DI 3 switch "OPEN"

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Parameter Menu (PAR) Part 3

analog output default

function D1

inactive x
flow rate
level
velocity
temperature
constant current

output range

0-20 mA

4-20 mA x
value at 0/4 mA 1 m/s
value at 20 mA 0,8 m/s

errror mode

inactive x

ac t i ve

error input mask

value in error cas e

hold old value

constant 0 mA x

constant 3,6 mA

constant 4,0 mA

constant 20,475 mA

digital outputs

relay functions 1

no function x

limit flow rate

limit level

limit velocity

limit temperature

pos-total impulse

neg-total impulse

error mess ages

error input mask
name R1

Par. below at active relaiy function only

swit ching mode

normally open x
normally closed

OCM F

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Parameter Menu (PAR) Part 4

default

stability 60

swit ch point on
swit ch point off
time delay on 0
time delay off 0
name R1

only when relay s function is "impuls e"

impulse duration 5
amount 1

control unit

setup paramet er

function

not active
internal set point active
external s et point active

external s et point range at 0/4 mA
external s et point range at 20 mA

max.flow rate 200
int. set point flow 40
control deviation 5
cycle time 90
shifter time 120
min. Pulse time 1
max. Pulse time 15
P-factor 70
h-Quick close function 1
Q-Quick close function 1000
t-Quick close funct ion 60
t of Pos. “CLOSED“ 30
time delay 0

system reset

service mode

service c ode

damping 20

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Parameter Menu (I/O)

I/O

digital input
analog output
digital output
measurement data
sensor info
v-histogram
external set point
external level
control unit
control unit test mode

Parameter Menu (CAL)

CAL default

level

calibration

velocity

min. velocity -4,0000
max. velocity 4,0000
calibration factor 1,0000
h-crit. 0,065
h-crit. min. 0
auto dischar. Curve

nicht aktiv
aktiv x

v-crit detremination

Manning-Strickler x
manual

assistant
slope
Strickler Coeff.
h manual
v manual
assistant

analog outputs

calibration 0
simulation 0

digital outputs

simulation

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Parameter Menu (EXTRA)

Extra default

set total counter 0

info (1-4)

(page 1)
(page 2)
(page 3)
(page 4)

unit system

units

display format

language

display

metric x
UK-english
US-english

flow rate
velocity
level
total

velocity
level
total

Deutsch x
english
Français
Polski

contrast 50%

system time

info
date
time
format

24h x
12h

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Error

Possible reasons

Correction

No indication of flow

Connection

Check connection between sensor cable and ter-

Sensor

Check sensor installation (towards flow direction,

Check sensor for soiling, sedimentation, silting (

Flow level measure-

Important: no flow level  no flow velocity meas-

Check level measurement parameter "Fixed value“

Transmitter

Call up error memory. Depending on error mes-

Negative flow direction

Check installation direction of the sensor, rotate

Programming

Completely check the transmitter parameter set-

Display >Error Doppler

Connection

Check cable connection. Wiring on terminal strip

Communication

Communication to sensor disturbed. Can be

11 Troubleshooting

OCM F

(>0<or >----<)

ment

minal strip. Check connection boxes, connections
for sensor cable extension or air compensation
element for correct connection or moisture. Sensor
cable connected to appropriate terminal clamp strip
(Ex or Non-Ex)?

horizontal installation).

to be removed) or mechanical damage or sensor
body and cable ( replace sensor).

urement possible!!
In case of Doppler level measurement: check sen­sor for horizontal installation. Check sensor func­tion in menu >I/O - >v-Histogram<.
In case of external level measurement: check func­tion and signal transmission (cables, clamp con­nections, short circuits and contact resistances).
In case of measurement with pressure cell: check
compensation channel at sensor body for obstruc­tions. Remove yellow cap from filter element.

in case measuring in full channel without using
level measurement.

sages take the respective measures (check cables,
plug and socket connections, sensor installation).

sensor if required.
If the flow direction is reversed only occasionally
and the measurement fails subsequently  set
min. value to -6,0 m/s in menu CAL-Flow vel. –
min. + max. value.

tings.

Sensor<

switched? Cables firmly connected to plugs (re­tighten screws, pull at cable ends)? Insulation of
single wires unintentionally clamped in?

checked by choosing menu I/O >Doppler-Info<.
Sensor should be indicated in the first line of the
following screen. Check cables for interruption or
loose connection. Check sensor for mechanical
damage.

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Unstable measure-

Hydraulically unsuita-

Check quality of measurement place by using the

Remove soiling, sedimentation or obstructive con-

Straighten the flow profile by installing appropriate

Increase damping.

Sensor
Check sensor installation (towards flow direction,
Check sensor for sedimentation or obstructions.

Implausible measure-

Hydraulically unsuita-

See "Unstable measurement values“.

External level signals

Check for correct connection.

Check if cables are crushed, for short circuits and

Check measurement range and span.

Check input signal in I/O menu.

Sensor

Check for correct connection.

Check if cables are crushed / for extensions/cable

Check level signal, echo profile, flow velocity

Check if sensor is installed on a vibration-free
Programming

Check if the correct shape of measurement place

Faulty Digital output

Connection

Check connections on terminal clamp strip.

Check power supply of external control relays.

In I/O menu check signals to be output.

Check output control function in calibration menu.

ment values

ment values

ble measurement
place

ble measurement
place

graphic frequency group distribution display. Relo­cate the sensor to a hydraulically more suitable
place (extend calming section).

structions in front of the sensor.

baffle plates and calming elements, flow straight­eners or similar upstream of measurement.

horizontal installation).

improper resistive loads or current consumers
without galvanic isolation.

types, short circuits, surge arresters or improper
resistive loads.

signal, cable parameters and temperature in
I/O menu.

place. Check sensor installation (towards flow di­rection, horizontal installation), check sensor for
soiling.

has been set, check dimensions (observe units),
sensor type, sensor installation height etc.

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Programming

Check if relay outputs are enabled.

Check if outputs are correctly assigned to respec-

Check additional values such as impulse parame-

No controller function

Connection

Check terminal clamps (relays 4 and 5 are dedi­Check power supply of external control relays.

Check input signals from limit contacts and set-

Check output control function by using menu man-

Programming

Check settings. Controller enabled? Controller pa-

Faulty mA output

Connection

Check connection clamps for correct wiring and

In case of using one or several outputs: check fol-

Programming

Output enabled?

Check if functions have been assigned to correct
Check output range (0 or 4-20 mA)

Check output span

Check offset

Check output signal in I/O menu

Following systems

Check cables and connections as well as input and

Check input range (0 or 4-20 mA) of following sys­Check input span of following system.

Check offset of following system.

PC / Laptop unable to

No device driver in-

Reinstall driver, on WINDOWS warning press

tive output channels.

ters, limit values, logic etc.

cated to controller function).

point.

ual controller operation.

rameters set? Analog input set and enabled as
setpoint? Relay outputs enabled? Observe control­ler status in I/O menu.

polarity.

detect device

stalled

lowing systems/indicators if they are potential-free.
Two analog outputs at a time have a common
ground.

output channel.

output clamps.

tem.

"Continue anyway“.

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12 Verification of the Measurement System

12.1 General

The verification of the measurement system should be carried out by the NIVUS
service if possible or by an expert company authorised by NIVUS.
In case of an initial general verification carried out by hydraulically and technical­ly well-versed personnel, proceed according to the guidelines described below:

− Check power supply on the OCM F. The according slide switch on the board
must be engaged (see Fig. 7-12). The main screen must be visible on the
transmitter display.

− Check the communication between flow velocity sensor or combi sensor and
transmitter at I/O/Doppler-Info

− If the sensor(s) is/are not recognised, check the connections as well as over­voltage protection elements which might have been used

− Check the level measurement

− Check the flow velocity measurement

− Check analog and digital inputs and outputs (see Chap. 9.5.1, 9.5.2 as well

as Chap. 12.2 and 12.3)

For initial assessment mainly the I/O menu as well as the >I-key< on the trans­mitter are helpful.
Refer to chapter 11 to locate the most prominent errors.

12.2 Verification of Combi Sensor with Pressure Measurement Cell

Due to physical reasons, the level measurement using sensors with pressure
measurement cell is subject to long-term drift (see >Technical Instructions of
Doppler Sensors<). NIVUS therefore recommend to calibrate sensors with inte­grated pressure measurement cells twice per year regarding the zero point. The
best calibration results can be achieved if the water level is as low as possible or
by dismantling and removing the sensors from the measurement medium.
The calibration procedure is described in Chapter 9.6.1.

Adjusting the zero point by measuring the current filling level with a yardstick,
a ruler or similar in the flowing medium is tending to errors. As soon as the
ruler (or yardstick) is being put into the flowing water the resulting surge will
lead to measurement errors depending on the current flow velocity. This is
why the filling level for reference measurement purposes has to be measured
always from top down!

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Fig. 12-1 Determination of reference level under operating conditions

Flow velocity sensors with pressure measurement sensor (Type KP) must be
uninstalled as soon as the pressure level measurement fails. The sensor shall
be soaked for an appropriate period and the pressure channel (see Fig. 5-1)
shall be flushed carefully of shall be cleaned with a soft brush.

Do not use high pressure to flush the channel. This may lead to misadjustment
of the 0-point or may even destroy the built-in pressure sensor.

Furthermore never remove the ground plate (risk of leakage or sensor destruc­tion)!

12.3 Verification of external Level Measurement

Using an external level measurement (e.g. NivuMaster) needs to measure the
filling level in the channel with a yardstick (see Fig. 12-1) and to adjust the zero
point on the level transmitter if required.
Then compare output signal as well as measurement span of the external
measurement with the analog input signal and the measurement span of the
OCM F in PAR menu as well as in I/O menu and adjust accordingly if required.

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12.4 Verification and Simulation of Input and Output Signals

The I/O menu (see Chap. 9.5) allows to verify connected sensors as well as to
check signal inputs and outputs with the aid of several submenus. Various val­ues can be indicated (current input and output values, relay conditions, echo
profiles, single velocities etc.), signals or conditions however (offset, adjustment,
simulation or similar) cannot be influenced.
Analog output signals, relay conditions as well as the theoretical flow can be
simulated in the CAL menu (see Chap. 9.6).

12.5 Verification of Flow Velocity Measurement

Use the menu I/O/v-histogram to view the frequency histogram of the V-sensor.
Chapter 8.5.6 describes how to assess the histogram.
The velocity can be verified using a portable flowmeter e.g. PCM Pro, PVM-PD,
hydrometric vane etc.). A calibration factor can be entered here if the deviation
of the flow velocity should be strong (chapter 9.6.2)
The sensor is obstructed due to build-up or soiling (to be removed) as soon as
the histogram indicates visible disturbances.
Another reason is that the sensor may have been installed at a hydraulically un­favourable position tending to low measurement quality or measurement failure
(check installation position of sensor).
Please note, that without a working level measurement it is not possible to
measure flow velocities and hence the flow cannot be computed.
If the flow velocity measurement fails, the sensor however is connected correctly
and lines, clamping connections and overvoltage protection have been checked,
the sensor possibly may be defective.

In various countries it may be necessary to carry out regular maintenance with
comparative measurements in particular applications to comply with official regu­lations. If desired, NIVUS is going to carry out all required verifications, hydraulic
and technical assessment, calibration, troubleshooting and repairs if an accord­ing maintenance agreement has been contracted. These services will be carried
out according to DIN 19559 incl. the agreed proof of the remaining residual er­ror, as well as according to rules in the respective countries.

Instruction Manual

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13 Maintenance and Cleaning

OCM F

WARNING

Germ contamination

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

Important note:

To avoid damage of the instrument the measures described in this section of
the instruction manual must be executed by trained expert personnel exclu­sively.

Please disconnect the unit from mains prior to maintenance, cleaning and/or
repair works.

13.1 General Maintenance

The device Type OCM F is designed to be virtually maintenance-free and free of
material wear and moreover needs no calibration.
Maintenance extents as well as the according cycles depend on the following
factors:

13.2 KDA-Sensor

WARNING

− measurement principle of the level sensor

− material wear

− measurement medium and channel hydraulics

− general regulations for the operator of this measurement plant

− ambient conditions

To ensure reliable, accurate and error-free function of the measurement system,
we recommend annual inspections of the entire measurement system by
NIVUS.
If required clean the transmitter enclosure if with a dry, lint-free cloth. For heavy
pollution NIVUS recommends the use of surface-active agents.
The use of abrasive cleansing agents is not allowed.

Damage caused by hard objects

No hard objects such as wire brushes, rods, scrapers or similar shall be used to
clean the sensor. This may result in damaged sensors, lead to measurement
failures and hence is prohibited in principle.

You can find a comprehensive description on sensor maintenance and cleaning
in the "Technical Instructions for Doppler Sensors"“.

Instruction Manual

OCM F

OCM F - Rev. 04 as of 18.02.2014 Page 95

13.3 Accessories (optional)

KDA-Sensor

KDA-K…

Pipe measurement section

OCM0 ZDN0

Flange

ZUB0 DN200

Flange gasket set

ZUB0 DN200-DISET

Pressure compensation el­ement

ZUB0 DAE

Replacement filter

ZUB0 FILTER02

Pipe mounting system

ZUB0 RMS2…

ZUB0 RMS3…

ZUB0 RMS4…

Ultrasonic Doppler sensor for flow velocity or combi sensor for flow
velocity and level for connection to OCM F.

for OCM Pro CF and OCM F (short)

Flange DN 200 made of PVC with R1" thread (Pipe measurement sec­tion short)

Flange gasket set for DN 200

for connection of sensors with pressure measurement cell

Material: aluminium, plastic, degree of protection: IP54

with plug and connection hose for sensors with pressure measurement
cell for connection PCM-series transmitters as well as the ZUB0 DAE
pressure compensation element.

for temporary installation of POA, KDA, CSM and DSM wedge sensors
in pipe lines with diameters between 200 and 800 mm

Stop ball valve

ZUB0 HAHNR15

Tapping saddles

ZUB0 ABS01…

ZUB0 ABS02…

ZUB0 ABS03…

Welding nozzle

ZUB0 STU15…

You can find more accessories for sensor installation in our current price list.

for removal of pipe sensors from pipes without pressure

for installation of 1½“ pipe sensors in pipe lines

For pipe sensors; material steel or stainless steel

Instruction Manual

Page 96 OCM F - Rev. 04 as of 18.02.2014

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Channel wall consistency

M in m

1/3

/s

k in mm

plastic (PVC, PE)

14 Table „Manning - Strickler Coefficients“

glass, PMMA, polished metal surfaces > 100 0...0,003

OCM F

≥ 100

new steel plate with protective coating;

smooth

smoothened cement plaster

asphalt coated steel plate;

concrete from steel or vacuum formwork, no joints, carefully smooth­ened;

planed wood, joint-free, new;

asbestos cement, new

smoothened concrete, smooth finish;

moderately rough

planed wood, well-joint

concrete, good formwork, high cement contents 80 0,8

non-planed wood; concrete pipes 75 1,5

hard-burned bricks, carefully joint;

well-manufactured ashlar facing;

concrete from joint-free wooden formwork

90...100 0,1...0,3

85...90 0,4

70...75 1,5...2,0

0,05

0,03...0,06

0,6

rolling-cast asphalt finish 70 2

ashlar masonry, well-manufactured;

moderately incrusted steel pipes;

rough

non-finished concrete, wooden formwork;

squared stones; old and swelled wood;

cement walls

non-finished concrete; old wooden formwork;

brickwork, no joints, finished;

dry stone wall, less carefully manufactured;

soil material, smooth (fine-grained)

Rougher surfaces are difficult to measure under hydraulic aspects and hence are not described here

65...70 3

60 6

Instruction Manual

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OCM F - Rev. 04 as of 18.02.2014 Page 97

15 Emergency

In case of emergency

− press the emergency-off button of the main system or

− set the slide switch (see Fig. 7-12) on the unit to OFF.

16 Dismantling/Disposal

The device shall be disposed according to the local regulations for electronic
products.

17 Table of Pictures

Fig. 3-1 Transmitter nameplate ........................................................................................................................ 8

Fig. 4-1 Overview ............................................................................................................................................. 9

Fig. 5-1 Construction of combi sensor Type “KDA“ with additional pressure measurement cell ...................13

Fig. 5-2

Fig. 5-3 Type key for OCM F measurement transmitter ................................................................................. 16

Fig. 7-1 Wall mount enclosure ........................................................................................................................ 19

Fig. 7-2 Connection Enclosure ....................................................................................................................... 23

Fig. 7-3 Clamp wiring OCM F ......................................................................................................................... 24

Fig. 7-4 Connection of 1 wedge or pipe sensor (no Ex), Type K0 or R0 .......................................................25

Fig. 7-5

Fig. 7-6 Connection of 1 KDA wedge or pipe sensor (Ex), Type K0 or R0 .................................................... 26

Fig. 7-7 Connection of 1 KDA combi sensor (Ex) with integrated pressure measurement cell, Type KP ..... 26

Fig. 7-8 Connecting an ext. 2-wire sensor (no Ex) for flow level measurement............................................. 26

Fig. 7-9 Connecting a NIVUS i-Serial sensor for level measurement in Ex-Zone 1 ...................................... 27

Fig. 7-10 Connecting an ext. 2-wire sensor (Ex) for flow level measurement..................................................27

Fig. 7-11

Fig. 7-12 Slide switch position in terminal clamp housing ................................................................................ 28

Fig. 7-13 AC model power supply .................................................................................................................... 28

Fig. 7-14 DC model power supply .................................................................................................................... 29

Fig. 7-15 Connecting the overvoltage protection for power supply and analog inputs and outputs ................ 30

Fig. 7-16 Overvoltage protection compact Doppler active sensor ...................................................................31

Fig. 7-17

Fig. 7-18 Setup of a controlled system such as a discharge control ................................................................ 33

Fig. 7-19 Wiring diagram for controller operation ............................................................................................. 34

Fig. 8-1 Keypad .............................................................................................................................................. 37

Fig. 8-2 Main screen ....................................................................................................................................... 37

Fig. 8-3 Auxiliary screen ................................................................................................................................. 38

Fig. 9-1

Fig. 9-2 Language selection ........................................................................................................................... 41

Fig. 9-3 Operation mode selection ................................................................................................................. 41

Fig. 9-4 Day values ......................................................................................................................................... 42

Fig. 9-5 Time of day totalising ........................................................................................................................ 42

Fig. 9-6 Error message...................................................................................................................................43

Fig. 9-7

Fig. 9-8 System information............................................................................................................................ 44

Fig. 9-9 Additional system information ........................................................................................................... 44

Fig. 9-10 Selecting the unit system .................................................................................................................. 45

Fig. 9-11 Selecting the units ............................................................................................................................. 45

Fig. 9-12 Selecting the display format ..............................................................................................................45

Fig. 9-13

Fig. 9-14 complete system time ....................................................................................................................... 46

Fig. 9-15 Totalizer modification ........................................................................................................................ 46

Construction pipe sensor, type KDA ................................................................................................. 14

Connection of 1 KDA combi sensor (no Ex) with integrated pressure measurement cell, Type KP 25

Connecting an external flow level measurement via NivuMaster ..................................................... 27

Overvoltage protection compact Doppler active sensor (Ex) ............................................................ 31

Screen on end of parameter setting .................................................................................................. 40

Extra-submenus ................................................................................................................................ 44

system time - submenus ................................................................................................................... 46

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Fig. 9-16 PIN-Code request.............................................................................................................................. 46

Fig. 9-17 submenu – name............................................................................................................................... 47

Fig. 9-18 Setting the name (of the measurement place) .................................................................................. 48

Fig. 9-19 Accepting the new name ................................................................................................................... 48

Fig. 9-20 Channel shape selection ................................................................................................................... 49

Fig. 9-21 Selected profile screen ...................................................................................................................... 49

Fig. 9-22 List of breakpoints for >Custom shape< ........................................................................................... 49

Fig. 9-23 breakpoints for >Custom shape< ...................................................................................................... 50

Fig. 9-24 Selection low-flow volumes ............................................................................................................... 51

Fig. 9-25 Menu level measurement .................................................................................................................. 51

Fig. 9-26 Example in case of external level sensor .......................................................................................... 51

Fig. 9-27 Determine the sensor type ................................................................................................................ 51

Fig. 9-28 Sensor type 1: Pressure int. .............................................................................................................. 52

Fig. 9-29 Sensor type 2: Constant level ........................................................................................................... 52

Fig. 9-30 Sensor type3: 22 wire probe ............................................................................................................. 53

Fig. 9-31 Sensor type 4: 2-wire probe Ex ......................................................................................................... 53

Fig. 9-32 i-Series sensors measurement range ............................................................................................... 54

Fig. 9-33 Sensor settings .................................................................................................................................. 55

Fig. 9-34 Digital inputs – submenu ................................................................................................................... 55

Fig. 9-35 Digital inputs functions ...................................................................................................................... 56

Fig. 9-36 Menü Analogausgang ....................................................................................................................... 57

Fig. 9-37 Analog output signal quality .............................................................................................................. 57

Fig. 9-38 Selection flow .................................................................................................................................... 58

Fig. 9-39 Selection constant current ................................................................................................................. 58

Fig. 9-40 Extended submenu analog output .................................................................................................... 59

Fig. 9-41 Error input mask ................................................................................................................................ 59

Fig. 9-42 Programming error output ................................................................................................................. 59

Fig. 9-43 Relay selection menu ........................................................................................................................ 60

Fig. 9-44 Relay outputs – submenu ................................................................................................................. 60

Fig. 9-45 Error input mask ................................................................................................................................ 61

Fig. 9-46 Limit value parameter ........................................................................................................................ 61

Fig. 9-47 Impulse parameters / impulse duration ............................................................................................. 62

Fig. 9-48 Control unit basic settings ................................................................................................................. 62

Fig. 9-49 Setting the external setpoint .............................................................................................................. 63

Fig. 9-50 Control unit settings .......................................................................................................................... 63

Fig. 9-51 Setup parameter – submenu ............................................................................................................. 65

Fig. 9-52 New program start OCM F ................................................................................................................ 66

Fig. 9-53 Choose language .............................................................................................................................. 66

Fig. 9-54 I/O Menu ............................................................................................................................................ 67

Fig. 9-55 Screen digital values ......................................................................................................................... 67

Fig. 9-56 Screen analog values ........................................................................................................................ 67

Fig. 9-57 Screen digital values ......................................................................................................................... 68

Fig. 9-58 Screen measurement data ................................................................................................................ 68

Fig. 9-59 Status of sensors and velocity evaluation ......................................................................................... 69

Fig. 9-60 Distribution of frequency groups ....................................................................................................... 69

Fig. 9-61 Flow velocity profiles ......................................................................................................................... 70

Fig. 9-62 External level selection ..................................................................................................................... 70

Fig. 9-63 Control unit selection ......................................................................................................................... 71

Fig. 9-64 Control menu for test control unit ...................................................................................................... 71

Fig. 9-65 CAL- menu selection ......................................................................................................................... 72

Fig. 9-66 Submenu - level ................................................................................................................................ 72

Fig. 9-67 Submenu – velocity ........................................................................................................................... 73

Fig. 9-68 Flow velocity determination graph ..................................................................................................... 74

Fig. 9-69 Defining v-crit .................................................................................................................................... 74

Fig. 9-70 Selecting v-crit determination ............................................................................................................ 75

Fig. 9-71 Manning Strickler v-crit determination ............................................................................................... 75

Fig. 9-72 Manually setting v-crit determination................................................................................................. 75

Fig. 9-73 Assistant – start measuring v-crit determination ............................................................................... 76

Fig. 9-74 Measuring Countdown Assistant ....................................................................................................... 76

Fig. 9-75 Create dam-up – start measuring ..................................................................................................... 76

Fig. 9-76 Measuring countdown for the second measuring ............................................................................. 76

Fig. 9-77 Assistant indicating investigated values ............................................................................................ 77

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Fig. 9-78 Adjustment of analog outputs ............................................................................................................ 77

Fig. 9-79 Simulation of analog outputs ............................................................................................................. 78

Fig. 9-80 Relay simulation ................................................................................................................................ 79

Fig. 9-81 Simulation mode................................................................................................................................ 79

Fig. 9-82 PaDa Installation Warning ................................................................................................................. 80

Fig. 9-83 PaDa English ..................................................................................................................................... 80

Fig. 12-1 Determination of reference level under operating conditions ........................................................... 92

Instruction Manual

Page 100 OCM F - Rev. 04 as of 18.02.2014

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18 Index

A

Analog outputs 57, 67

C

Cable Glands 22
Calibration menu 72
Channel shape 48
Clamp wiring 24
Connecting an i serial sensor 27
Connection 22
Control algorithm 35
Control unit 62
Copyright 3

OCM F

Mounting height 53

N

Name of measurement place 47
Names 3

O

Operating permits 12
Operation basics 39
Overvoltage Protection 29

P

Parameter setting 40
Parameter tree 82

D

Danger by electric voltage 7
Danger Notes 7
Day values 41
Delivery 17
Device identification 8
Digital inputs 55, 67
Documentation 17

E

Electrostatic discharge 21
error diagnostics 67
Error messages 42
Ex Approval 10

F

Flow velocity detection 15
Function principle 13

G

Generals 6
Graphic display 37

I

Initial start-up 36
Installation 19

K

Keypad 37

R

Receipt 17
Relay functions 61
Relay menu 60
Return 18

S

Sensor connection 25
Sensor info menu 69
Setup parameter 65
Simulation 77
Slide Valve

Runtime 35
Sludge level 50
Software tool >PaDa< 80
Spare parts 11
Storing 17
Subject to Wear 11
Syst

em information 44

T

Totalizer 46
Translation 3
Transport 18

U

Unit versions 16
Units 45
Use in accordance with the requirements 9

L

Language 45
Level Parameter 51

M

Maintenance 94
Manning-Strickler coefficients 96
Measurement Section 33

V

VDI/VDE Directive 2640 15
Verification

Combi sensor 91

external level measurement 92

I/O signals 93

measurement system 91

velocity measurement 93