KROHNE AAS-2000 User Manual
OPTISENS AAS 2000
OPTISENS AAS 2000
OPTISENS AAS 2000OPTISENS AAS 2000
Dissolved Oxygen Sensor
Handbook
Handbook
HandbookHandbook
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OPTISENS AAS 2000
All rights reserved. It is prohibited to reproduce this documentation, or any part thereof, without
the prior written authorisation of KROHNE Messtechnik GmbH & Co. KG.
Subject to change without notice.
Copyright 2008 by
KROHNE Messtechnik GmbH & Co.KG - Ludwig-Krohne-Straße 5 - 47058 Duisburg
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OPTISENS AAS 2000
1 Safety instructions......................................................................... 5
1.1 Intended Use ........................................................................................................ 5
1.2 Safety instructions from the manufacturer......................................................... 5
1.2.1 Copyright and data protection................................................................................... 5
1.2.2 Disclaimer.................................................................................................................. 5
1.2.3 Product liability and warranty ...................................................................................6
1.2.4 Information concerning the documentation .............................................................6
1.2.5 Display conventions................................................................................................... 7
1.3 Safety instructions for the operator .................................................................... 7
2 Device description ......................................................................... 8
2.1 Scope of delivery .................................................................................................. 8
2.2 Device description................................................................................................ 9
2.2.1 Design ........................................................................................................................ 9
2.3 Nameplates........................................................................................................ 10
2.3.1 OPTISENS AAS 2000 ................................................................................................10
CONTENTS
3 Installation................................................................................... 11
3.1 Notes on installation.......................................................................................... 11
3.2 Storage & Transport .......................................................................................... 11
3.3 Installing or changing the electrode ................................................................. 12
3.4 Mounting of the sensor ...................................................................................... 15
3.4.1 Mounting to MAA 2000 telescopic rod immersion holder ...................................... 15
3.4.2 Mounting to MAA 2000 slide rail immersion holder ...............................................18
3.5 Removing the sensor ......................................................................................... 19
4 Electrical connections ................................................................. 21
4.1 Safety instructions ............................................................................................. 21
4.2 Cable connections.............................................................................................. 21
5 Operation ..................................................................................... 22
5.1 Sensor display.................................................................................................... 22
5.2 Menu................................................................................................................... 22
5.3 Calibration.......................................................................................................... 25
5.3.1 Zero calibration ....................................................................................................... 25
5.3.2 Air calibration ..........................................................................................................25
5.4 Scaling................................................................................................................ 27
6 Service......................................................................................... 28
6.1 Cleaning ............................................................................................................. 28
6.1.1 Cleaning the sensor................................................................................................. 28
6.1.2 Cleaning the flushing nozzle ................................................................................... 29
6.2 Spare parts availability ...................................................................................... 30
6.3 Availability of services........................................................................................ 30
6.4 Support information form.................................................................................. 31
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CONTENTS
6.5 Returning the device to the manufacturer ........................................................ 32
6.5.1 KROHNE representative.......................................................................................... 32
6.5.2 General information ................................................................................................ 32
6.5.3 Form (for copying) to accompany a returned device .............................................. 33
6.6 Disposal.............................................................................................................. 33
7 Technical data ............................................................................. 34
7.1 Measuring principle ........................................................................................... 34
7.2 Technical data.................................................................................................... 34
7.3 Dimensions and weight...................................................................................... 36
8 Appendix...................................................................................... 37
8.1 Setup information form ..................................................................................... 37
9 KROHNE measuring technology - Product overview................... 40
OPTISENS AAS 2000
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OPTISENS AAS 2000
1.1 Intended Use
The OPTISENS AAS 2000 sensors are used to measure the concentration of dissolved oxygen in
water. They can be used in municipal and industrial waste water treatment facilities, water
monitoring stations and other applications.
1.2 Safety instructions from the manufacturer
1.2.1 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 German 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.
SAFETY INSTRUCTIONS 1
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.
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.
1.2.2 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.
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1 SAFETY INSTRUCTIONS
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.
1.2.3 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.
OPTISENS AAS 2000
1.2.4 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.
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OPTISENS AAS 2000
1.2.5 Display conventions
The following symbols are used to help you navigate this documentation more easily:
DANGER!
This symbol designates safety advice on handling electricity.
WARNING!
These warning signs must be observed without fail. Even only partial disregarding such
warnings can result in serious health damage, damage to the device itself or to parts of the
operator
CAUTION!
These warnings must be observed without fail. Even only partial disregarding such warnings can
lead to improper functioning of the device.
’
s plant.
SAFETY INSTRUCTIONS 1
LEGAL NOTICE!
This symbol designates information on statutory directives and standards.
INFORMATION!
This symbol designates important information for the handling of the device.
• HANDLING
HANDLING
HANDLINGHANDLING
This symbol designates all instructions for actions to be carried out by the operator in the
specified sequence.
i CONSEQUENCE
CONSEQUENCE
CONSEQUENCECONSEQUENCE
This symbol designates all important consequences of the previous actions.
1.3 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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2 DEVICE DESCRIPTION
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.
OPTISENS AAS 2000
Figure 2-1: Standard scope of delivery
1 AAS 2000 dissolved oxygen sensor
2 2 pcs of straps
3 Electrode cartridge AAS 2000 DO
4 10 m / 33 ft signal cable
5 10 m / 33 ft flush hose
6 Handbook
Optional accessories
• Protection plate AAS 2000 membrane
• MAA 2000 insertion holder, telescopic rod for OAS/AAS 2000 (incl. telescopic rod plus rod
holder, handrail mounting bracket and sensor adapter)
• MAA 2000 side wall mounting for OAS/AAS 2000
• Signal cable extension for OPTISENS 2000 sensors, 10 m / 33 ft
• Signal cable extension for OPTISENS 2000 sensors, 30 m / 98 ft
Consumables/Spare parts available
• Electrode cartrige AAS 2000 DO
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OPTISENS AAS 2000
2.2 Device description
The sensor is designed to continuously measure dissolved oxygen levels in liquids. It is effective
in saving energy costs associated with aeration systems in an activated sludge process. In
addition, accurate measuring of dissolved oxygen allows for better control of
nitrification/denitrification.
This manual details installation procedures and operational features of the sensor. Menu
navigation and technical data for the MAC 080 converter can be found in the MAC 080 manual.
2.2.1 Design
The sensor is manufactured with 316SS (SS2343) stainless steel. Built-in flushing nozzles allow
for the most accurate readings with little maintenance. The electronics is protected in the
rugged casing, ensuring its reliability in very demanding environments.
DEVICE DESCRIPTION 2
The sensor has a fixed, shielded 10 m / 33 ft cable used for signal transmission between the
sensor and the MAC 080 converter. The cable sheath is made of Hytrel and is highly resistant to
aggressive materials and fluids.
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2 DEVICE DESCRIPTION
2.3 Nameplates
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.
2.3.1 OPTISENS AAS 2000
OPTISENS AAS 2000
Figure 2-2: Nameplate
1 Manufacturer
2 Device type
3 Order code
4 Serial number
5 Sensor information
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OPTISENS AAS 2000
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 & Transport
INSTALLATION 3
• Store the device in a dry, dust-free location.
• Avoid continuous direct sunlight.
• The original packaging is designed to protect the equipment. It has to be used if you the
device is transported or send back to the manufacturer.
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3 INSTALLATION
3.3 Installing or changing the electrode
INFORMATION!
The sensor is delivered with the electrode uninstalled. The electrode must be installed and
calibrated before the sensor is submerged into water.
A plastic cap protects the electrode connection plug and the flushing nozzle in the sensor.
Remove the plastic cap before installing the electrode. Retain the plastic cap as it may be used
as protection later. Do not press on the top of the cap if the electrode is installed.
OPTISENS AAS 2000
Figure 3-1: Removal of plastic cap
1 Plastic cap
2 Sensor
Figure 3-2: Overview of the sensor
1 Protection plate
2 Electrode
3 Flushing head
4 Cable connector
5 Sensor housing
INFORMATION!
The electrode can usually be assembled and disassembled without tools.
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