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Installation

Oxymax H COS21

4

Hauser

2.2

Installation conditions

2.2.1

Angle of installation

The sensor must be installed with an angle of inclination of at least 10 ° to the horizontal in an 
assembly, support or a suitable process connection. Other angles are not permissible. Do

 not 

install the sensor overhead.

!

Note! 
Make sure you comply with the instructions for installing sensors. You will find them in the 
Operating Instructions for the assembly used.

2.2.2

Mounting location

• Select the installation location so that there is easy access for later calibration.
• Make sure that upright posts and assemblies are secured safely and vibration-free.
• For immersed operation in an activated sludge basin, select an installation location which 

produces a typical oxygen concentration.

2.3

Installation instructions

2.3.1

Measuring system

A complete measuring system comprises:
• Oxygen sensor COS21
• Transmitter, e.g. Liquisys M COM223/253 F
• Special measuring cable COK21
• Assembly, e.g. retractable assembly CPA475

a0006654-en

Fig. 1:  Permitted installation angle

10°

10° Not permissible!

Not permissible!

Permissible angle of installation

Summary of Contents for Oxymax H COS21

Page 1: ...BA244C 07 en 09 06 71032330 Operating Instructions Oxymax H COS21 Dissolved oxygen sensor...

Page 2: ...tified electrician Technical personnel must have read and understood these Operating Instructions and must adhere to them Before commissioning the entire measuring point check all the connections for...

Page 3: ...e contents are undamaged Inform the supplier about damage to the delivery contents Keep the damaged products until the matter has been settled Check that the scope of delivery is complete and agrees w...

Page 4: ...2 2 Mounting location Select the installation location so that there is easy access for later calibration Make sure that upright posts and assemblies are secured safely and vibration free For immerse...

Page 5: ...ll and connect the oxygen sensor Caution Do not install the sensor suspended from the cable Screw the sensor into the assembly so that the cable is not twisted Avoid exerting excessive tensile force o...

Page 6: ...Wiring Warning The electrical connection must only be carried out by a certified electrician Technical personnel must have read and understood the instructions in this manual and must adhere to them...

Page 7: ...eric air The air should be saturated with water vapour Therefore install the sensor as close to the water surface as possible When calibrating the sensor membrane make sure the membrane remains dry Th...

Page 8: ...peration by taking it out of the fluid drying it and then measuring the oxygen saturation index at air after 10 minutes Decide using the results a If the measured value is not at 102 2 SAT you have to...

Page 9: ...ing proceed as follows Caution After cleaning rinse the sensor with copious amounts of clean water 5 2 Regenerating the sensor 5 2 1 Replacing the sealing ring Replacing the sealing ring is only neces...

Page 10: ...the membrane cap 4 If necessary clean the cathode or replace the sealing ring if it is damaged 5 Rinse the electrode holder with drinking water Installing the new membrane cap 1 Make sure that there a...

Page 11: ......

Page 12: ...www endress com worldwide BA244C 07 en 09 06 Printed in Germany FM SGML 6 0 DT 71032330...

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