KROHNE OAM-2080 User Manual

Handbook

OPTISENS OAM 2080

OPTISENS OAM 2080OPTISENS OAM 2080

HandbookHandbook

Sludge blanket measuring system

The documentation is only complete when used in combination with the relevant documentation for the converter.

: IMPRINT ::::::::::::::::::::::::::::::::::

OPTISENS OAM 2080

Subject to change without notice.

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OPTISENS OAM 2080

CONTENTS

1 Safety instructions 5

1.1 Software history ............................................................................................................... 5

1.2 Intended use ..................................................................................................................... 5

1.3 Certifications .................................................................................................................... 5

1.4 Safety instructions from the manufacturer ..................................................................... 6

1.4.1 Copyright and data protection ................................................................................................ 6

1.4.2 Disclaimer ............................................................................................................................... 6

1.4.3 Product liability and warranty ................................................................................................ 7

1.4.4 Information concerning the documentation........................................................................... 7

1.4.5 Warnings and symbols used................................................................................................... 8

1.5 Safety instructions for the operator................................................................................. 8

2 Device description 9

2.1 Scope of delivery............................................................................................................... 9

2.2 Description of the single components ........................................................................... 10

2.3 Nameplate ...................................................................................................................... 12

3 Installation 13

3.1 Notes on installation ......................................................................................................13

3.2 Storage and transport .................................................................................................... 13

3.3 Typical measuring point ................................................................................................. 13

3.4 Installation order............................................................................................................ 14

3.4.1 Mounting, adjusting and fixing of meter and frame............................................................. 15

3.4.2 Installation of flushing .......................................................................................................... 17

4 Electrical connections 19

4.1 Safety instructions.......................................................................................................... 19

4.2 Cable connections ..........................................................................................................19

4.3 Connection diagram and grounding............................................................................... 20

4.4 Rake guard limit switch.................................................................................................. 20

4.5 Protection category ........................................................................................................21

4.6 Power supply .................................................................................................................. 21

5 Operation 22

5.1 Start-up and general remarks for configuration........................................................... 22

5.2 LED indication................................................................................................................. 22

5.3 Input of the basic settings .............................................................................................. 23

5.3.1 Connection of the sensor to a slot and output ..................................................................... 23

5.3.2 Definition of positions and zones.......................................................................................... 24

5.4 Scaling of a 4...20 mA output.......................................................................................... 26

5.5 Calibration ...................................................................................................................... 26

5.6 Manual hauling ............................................................................................................... 27

5.7 Display of sludge profile (optional) ................................................................................ 28

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CONTENTS

OPTISENS OAM 2080

5.8 Timer interval (optional)................................................................................................. 29

5.9 Faults: reasons and remedies ....................................................................................... 30

5.10 Menu for OAM 2000 sensor .......................................................................................... 31

6 Service 34

6.1 Manual initiation of a measurement .............................................................................. 34

6.2 Maintenance ................................................................................................................... 34

6.3 Spare parts and accessories.......................................................................................... 35

6.4 Spare parts availability...................................................................................................36

6.5 Availability of services .................................................................................................... 36

6.6 Returning the device to the manufacturer..................................................................... 36

6.6.1 General information.............................................................................................................. 36

6.6.2 Form (for copying) to accompany a returned device............................................................ 37

6.7 Disposal .......................................................................................................................... 37

7 Technical data 38

7.1 Measuring principle........................................................................................................38

7.2 Technical data................................................................................................................. 39

7.3 Dimensions ..................................................................................................................... 41

8 Notes 42

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OPTISENS OAM 2080

1.1 Software history

INFORMATION!

This documentation details the installation and operation of the OPTISENS OAM 2080 sludge blanket meter. For all information related to the converter (e.g. installation or technical data) refer to the converter documentation.

Release date Software version Documentation

04/2010 0.7 MA OAM 2080 R01 en

1.2 Intended use

INFORMATION!

The OPTISENS OAM 2080 only works in conjunction with the OPTISENS MAC 080 multiparameter converter which you need for configuration, local display and transmission of the measuring results. Additionally the converter must have the software version 3.1 or higher. The converter and the mounting plate belong to the standard scope of delivery.

SAFETY INSTRUCTIONS 1

In combination with the MAC 080 converter the OAM 2080 sludge blanket meter is primarily designed for use in water and waste water treatment plants. There it determines the sludge blanket depth in clarifiers and sludge thickeners. It measures the suspended solids concentration and height of the sensor above ground as the sensor is lowered into the basin or tank.

However, the design of the OAM 2080 makes it possible to use it in other applications where reliable monitoring of interface or stratification in suspensions is necessary.

1.3 Certifications

CE marking

The device fulfils the statutory requirements of the following EC directives:

• Electromagnetic compatibility (EMC) in accordance with: EN 61000-6-4:2001: Emission standard for industrial environments; EN 61000-6-2:2001: Immunity for industrial environments

• Low Voltage Directive: Safety requirements for electrical equipment for measurement, control and laboratory use in accordance with EN 61010-1:2001

The manufacturer certifies successful testing of the product by applying the CE marking.

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1 SAFETY INSTRUCTIONS

1.4 Safety instructions from the manufacturer

1.4.1 Copyright and data protection

The contents of this document have been created with great care. Nevertheless, we provide no guarantee that the contents are correct, complete or up-to-date.

The contents and works in this document are subject to copyright. Contributions from third parties are identified as such. Reproduction, processing, dissemination and any type of use beyond what is permitted under copyright requires written authorisation from the respective author and/or the manufacturer.

The manufacturer tries always to observe the copyrights of others, and to draw on works created in-house or works in the public domain.

The collection of personal data (such as names, street addresses or e-mail addresses) in the manufacturer's documents is always on a voluntary basis whenever possible. Whenever feasible, it is always possible to make use of the offerings and services without providing any personal data.

OPTISENS OAM 2080

We draw your attention to the fact that data transmission over the Internet (e.g. when communicating by e-mail) may involve gaps in security. It is not possible to protect such data completely against access by third parties.

We hereby expressly prohibit the use of the contact data published as part of our duty to publish an imprint for the purpose of sending us any advertising or informational materials that we have not expressly requested.

1.4.2 Disclaimer

The manufacturer will not be liable for any damage of any kind by using its product, including, but not limited to direct, indirect, incidental, punitive and consequential damages.

This disclaimer does not apply in case the manufacturer has acted on purpose or with gross negligence. In the event any applicable law does not allow such limitations on implied warranties or the exclusion of limitation of certain damages, you may, if such law applies to you, not be subject to some or all of the above disclaimer, exclusions or limitations.

Any product purchased from the manufacturer is warranted in accordance with the relevant product documentation and our Terms and Conditions of Sale.

The manufacturer reserves the right to alter the content of its documents, including this disclaimer in any way, at any time, for any reason, without prior notification, and will not be liable in any way for possible consequences of such changes.

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OPTISENS OAM 2080

1.4.3 Product liability and warranty

The operator shall bear responsibility for the suitability of the device for the specific purpose. The manufacturer accepts no liability for the consequences of misuse by the operator. Improper installation and operation of the devices (systems) will cause the warranty to be void. The respective "Standard Terms and Conditions" which form the basis for the sales contract shall also apply.

1.4.4 Information concerning the documentation

To prevent any injury to the user or damage to the device it is essential that you read the information in this document and observe applicable national standards, safety requirements and accident prevention regulations.

If this document is not in your native language and if you have any problems understanding the text, we advise you to contact your local office for assistance. The manufacturer can not accept responsibility for any damage or injury caused by misunderstanding of the information in this document.

This document is provided to help you establish operating conditions, which will permit safe and efficient use of this device. Special considerations and precautions are also described in the document, which appear in the form of underneath icons.

SAFETY INSTRUCTIONS 1

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1 SAFETY INSTRUCTIONS

1.4.5 Warnings and symbols used

Safety warnings are indicated by the following symbols.

DANGER!

This information refers to the immediate danger when working with electricity.

DANGER!

This warning refers to the immediate danger of burns caused by heat or hot surfaces.

DANGER!

This warning refers to the immediate danger when using this device in a hazardous atmosphere.

DANGER!

These warnings must be observed without fail. Even partial disregard of this warning can lead to serious health problems and even death. There is also the risk of seriously damaging the device or parts of the operator's plant.

OPTISENS OAM 2080

WARNING!

Disregarding this safety warning, even if only in part, poses the risk of serious health problems. There is also the risk of damaging the device or parts of the operator's plant.

CAUTION!

Disregarding these instructions can result in damage to the device or to parts of the operator's plant.

INFORMATION!

These instructions contain important information for the handling of the device.

LEGAL NOTICE!

This note contains information on statutory directives and standards.

• HANDLING

HANDLING

HANDLINGHANDLING

This symbol designates all instructions for actions to be carried out by the operator in the specified sequence.

i RESULT

RESULT

RESULTRESULT This symbol refers to all important consequences of the previous actions.

1.5 Safety instructions for the operator

WARNING!

In general, devices from the manufacturer may only be installed, commissioned, operated and maintained by properly trained and authorized personnel. This document is provided to help you establish operating conditions, which will permit safe and efficient use of this device.

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OPTISENS OAM 2080

2.1 Scope of delivery

INFORMATION!

Inspect the cartons carefully for damage or signs of rough handling. Report damage to the carrier and to the local office of the manufacturer.

INFORMATION!

Check the packing list to check if you received completely all that you ordered.

INFORMATION!

Look at the device nameplate to ensure that the device is delivered according to your order. Check for the correct supply voltage printed on the nameplate.

DEVICE DESCRIPTION 2

1 OAM 2080 sludge blanket meter 2 Converter 3 Mounting plate for converter 4 Handrail mounting frame 5 Key for cabinet lock 6 Mounting accessories 7 Documentation 8 Signal cable (1.5 m / 4.9 ft)

For information about optional accessories refer to

Spare parts and accessories

on page 35.

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2 DEVICE DESCRIPTION

2.2 Description of the single components

OPTISENS OAM 2080

1 Cable drum assembly 2 Pickup board and axle board 3 Heater and fan 4 Gasket 5 Main electronics unit 6 Flush valve with flush hose connector 7 Flushing tube 8 Sensor 9 5-pos. M12 female connector (A-coded) 10 ½" NPT female connector 11 Safety switch 12 Junction box with terminal blocks inside 13 Manual hauling switch 14 Cable connection terminal

Cable drum assembly

The cable drum helps to move the sensor up and down in the basin. It is mounted directly on the axle of a synchronous motor, hidden behind the drum mounting plate.

The cable drum always moves with a very constant speed. Since the diameter of the cable roll in the drum varies, the speed of the sensor varies. That is why the sensor moves slower during the end of the sampling.

The cable and sensor are cleaned by a water spray in the flushing tube during return to the home position.

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OPTISENS OAM 2080

Main electronics unit

The main electronics unit is located at the front door in a separate enclosure. It controls all mechanical events in the device and communicates with both the sensor and the converter. The communication with the converter is done through a RS-485 interface.

Other signals going in and out of sludge blanket meter are also conducted to the main electronics unit. The unit collects the values of the sludge concentration from the sensor and transmits them to the converter.

Sensor

The sensor is connected to a cable that supplies the sensor with power. The cable also transmits the communication signals to the pickup board.

The sensor contains a near-infrared light source and a receiver. Both are positioned in such a way that the emitted near-infrared light has to pass through the liquid before reaching the receiver.

Cable connection terminal

The separate box in the lower left corner of the enclosure contains the connection terminal for the external wire connections. To the left of this terminal block there is a safety switch that will disconnect the power when the enclosure door opens.

DEVICE DESCRIPTION 2

On the top of the terminal box there is an emergency motor control switch witch the functions "Up" and "Down". It allows to control the sensor movement even if the normal control function does not work.

Pickup board & axle board

The pickup board is mounted on a spring loaded lever arm and transfers power and communication signals to the cable drum. It also measures the revolutions of the cable drum with the help of sensors.

The axle board on the cable drum is powered contactlessly ("inductively") from the pickup board. It communicates with the main electronics unit via the pickup board and with the sensor via an optical RS-485 interface.

Heater & fan

The heater is located behind the drum mounting plate. Together with the fan it maintains a stable temperature inside the enclosure of the meter. The position of the fan is on the top right side of the enclosure.

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2 DEVICE DESCRIPTION

Flush tube and flush valve

The flush tube contains a nozzle ring that sprays cleaning water around the sensor and cable. Each time the sensor moves upwards into the flush tube, the cleaning works until the sensor reaches its highest position ("home position"). In that way the sensor keeps clean and the measurement is reliable in most environments and processes.

In the home position the sensor is completely covered by the flush tube, which contains an inductive limit switch. The switch determines the point when the sensor reaches its home position.

Flushing starts when the built-in solenoid flush valve opens. Its control is the task of the main electronics unit.

2.3 Nameplate

INFORMATION!

Look at the device nameplate to ensure that the device is delivered according to your order. Check for the correct supply voltage printed on the nameplate.

OPTISENS OAM 2080

1 Manufacturer 2 Device type 3 Order code 4 Serial number 5 Voltage information 6 Pressure specification for flushing

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OPTISENS OAM 2080

3.1 Notes on installation

INFORMATION!

Inspect the cartons carefully for damage or signs of rough handling. Report damage to the carrier and to the local office of the manufacturer.

INFORMATION!

Check the packing list to check if you received completely all that you ordered.

INFORMATION!

Look at the device nameplate to ensure that the device is delivered according to your order. Check for the correct supply voltage printed on the nameplate.

3.2 Storage and transport

• Store and transport the device in a dry, dust-free environment.

• Store and transport the device in an environment with a temperature between -20...+60°C/

-4...+140°F.

• The original packing is designed to protect the equipment. It has to be used if the device is transported or sent back to the manufacturer.

INSTALLATION 3

3.3 Typical measuring point

1 Mounting plate with sun roof 2 Converter 3 Sludge blanket meter 4 Handrail 5 Signal cable

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3 INSTALLATION

INFORMATION!

The OAM 2080 only works in conjunction with the MAC 080 multiparameter converter which you need for configuration, local display and transmission of the measuring results. Additionally the converter must have the software version 3.1 or higher. The converter and the mounting plate belong to the standard scope of delivery.

3.4 Installation order

DANGER!

Do not install the sludge blanket meter in hazardous areas, it can ignite explosive gases!

INFORMATION!

To install the measuring system in the best way, follow the steps described below. Regard that different steps may vary in meaning, depending on the particular sensor and the number of sensors that you want to connect to the converter.

INFORMATION!

All MAC 080 converters with a program version of 3.1 or higher are able to detect and install the sensor automatically. This procedure starts when both the converter and the sensor are supplied with power and the electrical connection between the devices is established.

OPTISENS OAM 2080

Steps to install the measuring system

• Mounting of converter (for detailed information refer to the relevant chapter in the converter manual).

• Mounting of sludge blanket meter (for detailed information refer to the relevant section in this chapter).

• Installation of flushing, if required (for detailed information refer to the relevant section in this chapter).

• Connection of the rake guard switch, if required (for detailed information refer to the relevant section in this chapter).

• Electrical installation of converter (for detailed information refer to the relevant chapter in the converter manual)

• Electrical installation of the sludge blanket meter (for detailed information refer to the relevant section in this chapter).

• Setup of converter (for detailed information refer to the relevant chapter in the converter manual).

• Settings and calibration of the sludge blanket meter (for detailed information refer to the relevant chapter in the manual of the meter).

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