Endress+Hauser Memosens COS81E Technical specifications

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Brief Operating Instructions
Memosens COS81E
Hygienic, optical sensor with Memosens 2.0
technology for the measurement of oxygen
These instructions are Brief Operating Instructions; they are
not a substitute for the Operating Instructions pertaining to
the device.
Detailed information on the device can be found in the
Operating Instructions and in the other documentation
available at:
• www.endress.com/device-viewer
• Smart phone/tablet: Endress+Hauser Operations App
KA01484C/07/EN/02.21
71520968
2021-03-22

Memosens COS81E
2 Endress+Hauser
TAG No.: XXX000
Ser. No.: X000X000000
Order code 00X00-XXXX0XX0XXX
www.endress.com/deviceviewer Endress+Hauser Operations App
Serial number
A0023555

Memosens COS81E Table of contents
Endress+Hauser 3
Table of contents
1 About this document .............................................................. 3
1.1 Safety information ..................................................................... 3
1.2 Symbols used ......................................................................... 4
1.3 Additional documentation ................................................................ 4
2 Basic safety instructions .......................................................... 5
2.1 Requirements for personnel .............................................................. 5
2.2 Designated use ........................................................................ 5
2.3 Occupational safety ..................................................................... 5
2.4 Operational safety ......................................................................6
2.5 Product safety ......................................................................... 6
3 Installation ....................................................................... 6
3.1 Installation conditions ................................................................... 6
3.2 Mounting the sensor .................................................................... 9
3.3 Post-installation check .................................................................. 9
4 Electrical connection ............................................................ 10
4.1 Connecting the sensor .................................................................. 10
4.2 Ensuring the degree of protection ......................................................... 10
4.3 Post-connection check ..................................................................11
5 Commissioning .................................................................. 11
5.1 Function check ....................................................................... 11
1 About this document
1.1 Safety information
Structure of information Meaning
LDANGER
Causes (/consequences)
If necessary, Consequences of non-
compliance (if applicable)
‣Corrective action
This symbol alerts you to a dangerous situation.
Failure to avoid the dangerous situation will result in a fatal or serious injury.
LWARNING
Causes (/consequences)
If necessary, Consequences of non-
compliance (if applicable)
‣Corrective action
This symbol alerts you to a dangerous situation.
Failure to avoid the dangerous situation can result in a fatal or serious injury.

About this document Memosens COS81E
4 Endress+Hauser
Structure of information Meaning
LCAUTION
Causes (/consequences)
If necessary, Consequences of non-
compliance (if applicable)
‣Corrective action
This symbol alerts you to a dangerous situation.
Failure to avoid this situation can result in minor or more serious injuries.
NOTICE
Cause/situation
If necessary, Consequences of non-
compliance (if applicable)
‣Action/note
This symbol alerts you to situations which may result in damage to property.
1.2 Symbols used
Symbol Meaning
Additional information, tips
Permitted or recommended
Not permitted or not recommended
Reference to device documentation
Reference to page
Reference to graphic
 Result of a step
1.2.1 Symbols on the device
Symbol Meaning
Reference to device documentation
1.3 Additional documentation
The following manuals which complement these Operating Instructions can be found on the
product pages on the Internet:
• Operating Instructions for the relevant sensor
• Technical Information for the relevant sensor
• Operating Instructions for the transmitter used
• Operating Instructions for the cable used
In addition to these Operating Instructions, an XA with "Safety instructions for electrical
apparatus in the hazardous area" is also included with sensors for use in the hazardous area.
‣Please follow instructions on use in the hazardous area carefully.

Memosens COS81E Basic safety instructions
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Safety instructions for electrical equipment in hazardous areas, Memosens 2.0 optical
oxygen:
• ATEX and IECEx: XA02238C
• INMETRO: XA02475C
• NEPSI: XA02476C
• JPN Ex: XA02485C
• CSA C/US: XA02520C
2 Basic safety instructions
2.1 Requirements for personnel
• Installation, commissioning, operation and maintenance of the measuring system may be
carried out only by specially trained technical personnel.
• The technical personnel must be authorized by the plant operator to carry out the specified
activities.
• The electrical connection may be performed only by an electrical technician.
• The technical personnel must have read and understood these Operating Instructions and
must follow the instructions contained therein.
• Faults at the measuring point may only be rectified by authorized and specially trained
personnel.
Repairs not described in the Operating Instructions provided must be carried out only
directly at the manufacturer's site or by the service organization.
2.2 Designated use
Use of the device for any purpose other than that described, poses a threat to the safety of
people and of the entire measuring system and is therefore not permitted.
The manufacturer is not liable for damage caused by improper or non-designated use.
2.3 Occupational safety
As the user, you are responsible for complying with the following safety conditions:
• Installation guidelines
• Local standards and regulations
• Regulations for explosion protection
Electromagnetic compatibility
• The product has been tested for electromagnetic compatibility in accordance with the
applicable international standards for industrial applications.
• The electromagnetic compatibility indicated applies only to a product that has been
connected in accordance with these Operating Instructions.

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2.4 Operational safety
Before commissioning the entire measuring point:
1. Verify that all connections are correct.
2. Ensure that electrical cables and hose connections are undamaged.
3. Do not operate damaged products, and protect them against unintentional operation.
4. Label damaged products as defective.
During operation:
‣If faults cannot be rectified:
products must be taken out of service and protected against unintentional operation.
2.5 Product safety
2.5.1 State-of-the-art technology
The product is designed to meet state-of-the-art safety requirements, has been tested, and
left the factory in a condition in which it is safe to operate. The relevant regulations and
international standards have been observed.
3 Installation
3.1 Installation conditions
3.1.1 Dimensions
Pg 13,5
50 (1.97) 120 / 160 / 220 / 320 / 420 (4.7 / 6.3 / 8.7 / 12.6 / 16.5)*
12 - 0.1
(0.47)
A0043883
 1 Dimensions in mm (inch)

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3.1.2 Orientation
COS81E-****C*** (c-shaped)
The sensor with the c-shaped spot cap is self-draining in the recommended installation angles
and can therefore be used for hygienic applications.
135°
225°
45°
315°
0° 180°
A0042948
 2 Installation angle Memosens COS81E-****C*** (c-shaped spot cap)
The sensor can be installed at any installation angle (0 to 360 °).
Recommended installation angle

Installation Memosens COS81E
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COS81E-****U*** (u-shaped)
45°
135°
45°
0° 180°
A0042949
 3 Installation angle Memosens COS81E-****U*** (u-shaped spot cap)
Recommended installation angle
Possible installation angle
Inadmissible installation angle
The sensor with the u-shaped spot cap must be installed at an inclination angle of 0 to 180˚
in an assembly, holder or a corresponding process connection. Recommended angle: 0 to 45°
or 135 to 180 ° to prevent the attachment of air bubbles. At angles of inclination of 45 to
135°, air bubbles at the oxygen-sensitive membrane may result in higher readings than
expected.
Inclination angles other than those mentioned are not permitted. In order to avoid buildup
and condensation on the spot, do not install the COS81E-****U *** sensor upside down.
Follow the instructions for installing sensors in the Operating Instructions for the
assembly used.
3.1.3 Mounting location
1. Choose a mounting location that is easy to access.
2. Ensure that upright posts and assemblies are fully secured and vibration-free.
3. Choose a mounting location with an oxygen concentration that is typical for the
application.

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3.2 Mounting the sensor
3.2.1 Measuring system
A complete measuring system comprises:
• a Memosens COS81E oxygen sensor
• Measuring cable CYK10
• A transmitter, e.g. Liquiline CM42, Liquiline CM44x/R, Liquiline CM44P, Liquiline Compact
CM72/82, Liquiline Mobile CML18
• Optional: an assembly, e.g. Unifit CPA842 fixed installation assembly , Flowfit CYA21 flow
assembly or Cleanfit CPA875 retractable assembly
• Optional: connection to an analog fermenter controller via the Memosens analog converter
CYM17
3.2.2 Installing at a measuring point
Must be installed in a suitable assembly (depending on the application).
LWARNING
Electrical voltage
In the event of a fault, non-grounded metallic assemblies may be live and as such are not safe
to touch!
‣When using metallic assemblies and installation equipment, national grounding provisions
must be observed.
For complete installation of a measuring point, proceed as follows:
1. Install the retractable assembly or a flow assembly (if used) into the process.
2. Connect the water supply to the rinse connections (if you are using an assembly with a
cleaning function).
3. Install and connect the oxygen sensor.
NOTICE
Installation error
Cable breakage, loss of sensor due to cable separation, unscrewing of spot cap!
‣Do not install the sensor freely suspended from the cable!
‣Screw the sensor into the assembly, ensuring that the cable is not twisted.
‣Hold the sensor body steady during installation or removal. Turn only at the hexagonal
nut of the armored coupling. Otherwise the spot cap might be unscrewed and will then
remain in the assembly or process.
‣Avoid exerting excessive tensile force on the cable (e.g. through jerky pulling movements).
‣Choose a mounting location that is easy to access for later calibrations.
‣Follow the instructions for installing sensors in the Operating Instructions for the assembly
used.
3.3 Post-installation check
1. Are the sensor and cable undamaged?
2. Is the orientation correct?

Electrical connection Memosens COS81E
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3. Is the sensor installed in an assembly and is not suspended from the cable?
4. Avoid the penetration of moisture by fitting the protection cap on the immersion
assembly.
4 Electrical connection
LWARNING
Device is live!
Incorrect connection may result in injury or death!
‣The electrical connection may be performed only by an electrical technician.
‣The electrical technician must have read and understood these Operating Instructions and
must follow the instructions contained therein.
‣Prior to commencing connection work, ensure that no voltage is present on any cable.
4.1 Connecting the sensor
The electrical connection of the sensor to the transmitter is established using measuring cable
CYK10.
GN/YE
YE
GN
BN
WH
GND
+
–
Com A
Com B
GY
A0024019
 4 Measuring cable CYK10
4.2 Ensuring the degree of protection
Only the mechanical and electrical connections which are described in these instructions and
which are necessary for the required, designated use, may be carried out on the device
delivered.
‣Exercise care when carrying out the work.
Otherwise, the individual types of protection (Ingress Protection (IP), electrical safety, EMC
interference immunity) agreed for this product can no longer be guaranteed due, for example
to covers being left off or cable (ends) that are loose or insufficiently secured.

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4.3 Post-connection check
Device condition and specifications Action
Are the sensor, assembly or cables free from damage on the
outside?
‣Perform a visual inspection.
Electrical connection Action
Are the mounted cables strain-relieved and not twisted? ‣Perform a visual inspection.
‣Untwist the cables.
Is a sufficient length of the cable cores stripped, and are the
cores positioned in the terminal correctly?
‣Perform a visual inspection.
‣Pull gently to check they are seated correctly.
Are all the screw terminals properly tightened? ‣Tighten the screw terminals.
Are all cable entries mounted, tightened and leak-tight? In the case of lateral cable entries:
‣Point cable loops downward so that water can drip
off.
Are all cable entries installed downwards or mounted
laterally?
5 Commissioning
5.1 Function check
Prior to initial commissioning, ensure that:
• The sensor is correctly installed
• The electrical connection is correct
If using an assembly with automatic cleaning function:
‣Check that the cleaning medium (water or air, for example) is connected correctly.
LWARNING
Escaping process medium
Risk of injury from high pressure, high temperatures or chemical hazards!
‣Before applying pressure to an assembly with cleaning system, ensure that the system has
been connected correctly.
‣If you cannot reliably establish the correct connection, do not install the assembly in the
process.
1. At the transmitter, enter all the settings specific to the parameters and measuring point.
These include the air pressure during calibration and measurement or the salinity, for
instance.
2. Check whether a calibration/adjustment is necessary.

Commissioning Memosens COS81E
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The oxygen measuring point is then ready to measure.
Following commissioning, the sensor must be serviced at regular intervals, as only then
can reliable measurement be guaranteed. Further information on this can be found in
the Operating Instructions for the sensor.
• Operating Instructions for Memosens COS81E, BA02066C
• Operating Instructions for the transmitter used, such as BA01245C if using the
Liquiline CM44x or Liquiline CM44xR.

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