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Oxymax H COS21D

Technical data

Hauser

Ambient temperature

–5 to +135 °C (23 to 175 °F)

Ingress protection

IP 68 (10 m (33 ft) water column at 25 °C (77 °F) during 45 days, 1 mol/l
KCl)

10.3 Process

Process temperature

• COS21D-A and COS21D-C:

-5 to 135 °C (23 to 275 °F)

• COS21D-B:

-5 to 100 °C (23 to 212 °F)

Process pressure

• COS21D-A:

0 to 4 bar (0 to 58 psi)

• COS21D-B and COS21D-C:

0 to 12 bar (0 to 174 psi)

10.4 Performance characteristics

Response time

From air to nitrogen at 25 °C (77 °F)
• t

: < 30 s

• t

: < 60 s

Reference operating
conditions

Current value at air

• COS21D-A:

60 nA (40 to 80 nA)

• COS21D-B and COS 21D-C:

300 nA (180 to 500 nA)

Zero current

< 0.1 % of the current in air

Measured value
resolution

• COS21D-A:

g/l (10 ppb)

• COS21D-B and COS21D-C:

g/l (1 ppb)

Maximum measured
error

±1 % of measured value

Reference temperature:

25 °C (77 °F)

Reference pressure:

1013 hPa (15 psi)

Reference application:

Municipal wastewater treatment

Содержание Oxymax H COS21D

Страница 1: ...BA402C 07 en 12 07 71066660 Operating Instructions Oxymax H COS21D Digital dissolved oxygen sensor ...

Страница 2: ...ument or to persons if ignored Caution This symbol alerts you to possible faults which could arise from incorrect operation They could cause damage to the instrument if ignored Note This symbol indicates important items of information È ä 1 This symbol indicates a cross reference to a defined page e g p 1 È å 2 This symbol indicates a cross reference to a defined figure e g fig 2 ...

Страница 3: ...or Ex applications 14 4 2 Direct connection to Liquiline M 15 4 3 Connection via junction box 16 4 4 Post connection check 16 5 Function 17 5 1 Sensor design 17 5 2 Measuring principle 17 5 3 Calibration 19 6 Commissioning 22 6 1 Function check 22 6 2 Polarization 22 6 3 Calibration 23 7 Maintenance 23 7 1 Cleaning 24 7 2 Replacing wear and tear materials 25 8 Accessories 27 8 1 Connection accesso...

Страница 4: ...al input of the Liquiline transmitter using the CYK10 measuring cable for non contact digital data transfer Any other use than the one described here compromises the safety of persons and the entire measuring system and is therefore not permitted The manufacturer is not liable for damage caused by improper or non designated use 1 2 Installation commissioning and operation Please note the following...

Страница 5: ...certified intrinsically safe digital sensor circuits of the transmitter Liquiline M CM42 G The electrical connection must be carried out in compliance with the wiring diagram Oxygen sensors for use in Ex areas have a special conductive O ring The metallic sensor shaft is electrically connected to the conductive mounting location e g a metallic assembly by means of the O ring You must take appropri...

Страница 6: ... and approvals 2 3 1 Ex approval Versions COS21D A 2 1 COS21D C 2 1 ATEX II 1G EEx ia IIC T3 T4 T6 Versions COS21D 3 1 FM CSA Class I Div 1 Groups A B C D T3 T4 T6 Class I Zone 0 AEx ia IIC T3 T4 T6 Notified body EXAM BBG Prüf und Zertifizier GmbH Bochum Application operational range A Standard 0 01 to 20 mg l B Trace beverages CO2 compatible 0 001 to 2 mg l C Trace power plants 0 001 to 2 mg l Sh...

Страница 7: ...ompliance of the materials used You can download the certificates from the product page www endress com a0007207 Fig 1 EC declaration of conformity Product FDA certificate for COS21D 1 2 Membrane O rings COS21D 1 1 when using membrane kits 71003199 71023226 Membrane kits 71003199 71023226 Membrane O rings ...

Страница 8: ...ide shock protection and humidity protection The original packaging offers the best protection Also keep to the approved ambient conditions see Technical data If you have any questions please contact your supplier or your sales center responsible 3 2 Installation conditions 3 2 1 Angle of installation The sensor must be installed with an angle of inclination of at least 10 to the horizontal in an ...

Страница 9: ...duces a typical oxygen concentration 3 3 Installation instructions 3 3 1 Measuring system A complete measuring system comprises The digital oxygen sensor Oxymax H COS21D A transmitter e g Liquiline M CM42 An appropriate measuring cable e g CYK10 Optional an assembly e g fixed installation assembly CPA442 flow assembly CPA240 or retractable assembly CPA475 a0001398 Fig 3 Example of a measuring syst...

Страница 10: ...rom the cable Screw the sensor into the assembly so that the cable is not twisted Mounting or dismounting the sensor hold the sensor body only turn the threaded plug in head while screwing the sensor in or out of the assembly Otherwise you could unscrew the sensor s membrane cap It will remain in the assembly resp in the process then Avoid exerting excessive tensile force on the cable e g from jer...

Страница 11: ...easy manner å 3 3 4 2 Flow assembly CPA240 The CPA240 flow assembly offers up to three installation slots for sensors with a shaft diameter of 12 mm 0 47 a shaft length of 120 mm 4 72 and a process connection Pg 13 5 It is very suitable for use in pipes or at hose connections During trace measurement in particular ensure the assembly is completely vented to avoid measuring errors a0005720 Fig 4 CP...

Страница 12: ...nstallation angle acc to sensor version 4 Overhead installation impermissible due to missing electrolyte contact of the sensor electrodes 5 Down pipe impermissible Note Do not install the assembly at places where air cushions or foam bubbles can form Measuring errors can occur if the sensor is not immersed into the medium suspended particles are settled on the sensor membrane the sensor is install...

Страница 13: ...ectrical 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 Ensure that there is no voltage at the power cable before beginning the connection work ...

Страница 14: ...Wiring Oxymax H COS21D 14 Endress Hauser 4 1 Sensor version for Ex applications 4 1 1 Quick wiring guide a0006059 Fig 7 Connection in the Ex area ...

Страница 15: ...ed no temperatures which are impermissible for the temperature class in question will occur at the sensor 4 2 Direct connection to Liquiline M Temperature class T3 T4 T6 Ambient temperature Ta 5 135 C 5 120 C 5 70 C Reference temperature Tref 25 C a0006130 Fig 8 View in device sensor module a0001078 Fig 9 Wiring diagram ...

Страница 16: ...able 4 Transmitter Instrument status and specifications Remarks Are the sensor assembly junction box or cable damaged Visual inspection Electrical connection Remarks Are the installed cables strain relieved and not twisted Long enough length of cable core stripped and correct in terminal Check seating pull slightly Are all the screws terminals properly tightened Tighten Are all the cable entries i...

Страница 17: ...between the cathode and anode The resulting polarization current is indicated on the display of the transmitter The current starts high but then drops over time The sensor can only be calibrated when the display is stable a0005631 Fig 11 Design 1 Threaded connection Pg 13 5 2 Anode 3 Membrane cap 4 Protective cap 5 Memosens plug in head 6 Cathode 7 Membrane a0005619 Fig 12 Dimensions 1 2 3 4 5 6 7...

Страница 18: ... with FDA SIP CIP Kit membrane material is specially designed for the high demands of frequent SIP CIP processes Note The electrolytes in the membrane caps are specific to the sensor versions and must not be mixed together 5 2 3 Amperometric principle The oxygen molecules diffused through the membrane are reduced to hydroxide ions OH at the cathode Silver is oxidized to silver ions Ag at the anode...

Страница 19: ... monitored at typical time intervals depending on operating experience or renewed 5 3 1 Types of calibration You can carry out single point or two point calibration for the sensor In most applications single point calibration suffices in the presence of oxygen calibration of measured value at air The additional calibration of the zero point two point calibration improves the precision of the measu...

Страница 20: ...rature of the ambient air This takes about 20 minutes Check that the sensor is not in direct sunlight during this time 5 If the measured value display on the transmitter is stable carry out the calibration in accordance with the Operating Instructions of the transmitter 6 Place the sensor in the medium again Note Make sure you comply with the instructions for calibration in the Operating Instructi...

Страница 21: ... 7 55 40 104 6 41 10 50 11 25 Altitude m ft K Altitude m ft K Altitude m ft K Altitude m ft K 0 1 000 550 1800 0 938 1050 3450 0 885 1550 5090 0 834 50 160 0 994 600 1980 0 932 1100 3610 0 879 1600 5250 0 830 100 330 0 988 650 2130 0 927 1150 3770 0 874 1650 5410 0 825 150 490 0 982 700 2300 0 922 1200 3940 0 869 1700 5580 0 820 200 660 0 977 750 2460 0 916 1250 4100 0 864 1750 5740 0 815 250 820 ...

Страница 22: ...n assembly with automatic cleaning check the correct water connection at the assembly rinse connection Warning Danger of medium leaking off Before applying compressed air to an assembly with cleaning facility make sure the connections are correctly fitted Otherwise the assembly may not be insert into the process 6 2 Polarization The sensor was tested in the factory for perfect functionality and is...

Страница 23: ...he calibration intervals should be 1 Check the sensor one month after its being put into operation 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 100 2 SAT you have to calibrate the sensor b Otherwise double the length of time to the next inspection 2 Proceed as per Point 1 af...

Страница 24: ...yte causes longer response times and false measurement To ensure reliable measurement the sensor must be cleaned at regular intervals The frequency and intensity of the cleaning operation depend on the measuring medium 7 1 1 Cleaning the sensor surface Clean the sensor before every calibration at regular intervals during operation as necessary before returning it for repairs Depending on the type ...

Страница 25: ... 7 2 1 Replacing the sealing ring Replacing the sealing ring is only necessary when it is visibly damaged For replacement use only original sealing rings 7 2 2 Replacing the electrolyte The electrolyte is slowly used up during measuring The cause of this is electrochemical substance reactions No substance reactions occur in the de energized state and the electrolyte is not used up The electrolyte ...

Страница 26: ...membrane cap 1 Remove the sensor from the medium 2 Clean the outside of the sensor 3 Unscrew 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 are no dirt particles on the sealing surface 2 Using the pipette supplied fill approx 1 5 ml 0 05 fl oz of e...

Страница 27: ... Sold by the meter order no 51502543 8 2 Installation accessories Flowfit P CPA240 pH redox flow assembly for processes with a high level of requirements Technical Information TI179C 07 en Cleanfit H CPA475 Retractable assembly for installation in tanks and pipework under sterile conditions Technical Information TI240C 07 en Unifit H CPA442 Installation assembly for food biotechnology and pharmace...

Страница 28: ...yte or replace electrolyte Displayed value too high Polarization complete Wait until polarization time ends Sensor calibrated Recalibrate Temperature display clearly too low Check sensor if necessary send sensor in for repair Membrane visibly stretched Replace membrane cap Electrolyte soiled Replace electrolyte Open sensor Dry electrodes Transmitter display now at 0 Check electrical connection If ...

Страница 29: ...no 51518699 Membrane kit CIP COS21 COS21D EN10204 O rings Viton membrane silicon rubber order no 71023225 Membrane kit FDA COS21 COS21D O rings membrane FDA certified material order no 71003199 Membrane kit FDA COS21 COS21D EN10204 O rings membrane FDA certified material order no 71023226 Scope of delivery all kits 3 Membrane caps 1 O ring process seal Viton none Ex 1 O ring sensor EPDM Note The e...

Страница 30: ...s and must therefore be disposed of in accordance with regulations on the disposal of electronic waste Please observe local regulations 10 Technical data 10 1 Input Measured variable Dissolved oxygen mg l SAT hPa Temperature C F Measuring range 10 2 Environment Storage temperature 10 to 60 C 10 to 140 F at 95 relative air humidity not condensing Measuring range Recommended operational range COS21D...

Страница 31: ...B and COS21D C 0 to 12 bar 0 to 174 psi 10 4 Performance characteristics Response time From air to nitrogen at 25 C 77 F t90 30 s t98 60 s Reference operating conditions Current value at air COS21D A 60 nA 40 to 80 nA COS21D B and COS 21D C 300 nA 180 to 500 nA Zero current 0 1 of the current in air Measured value resolution COS21D A 10 μg l 10 ppb COS21D B and COS21D C 1 μg l 1 ppb Maximum measur...

Страница 32: ...s Materials Process connection Thread Pg 13 5 Electrolyte COS21D A and COS21D C Alkaline electrolyte COS21D B Phosphoric acid electrolyte 1 In accordance with IEC 746 1 at nominal operating conditions Zero point drift 0 1 per week at 30 C 86 F Measuring range drift 0 1 per week at 30 C 86 F 1 1 under constant conditions each Sensor shaft Electrode combination O rings Process sealing of ATEX FM CSA...

Страница 33: ...on box 16 Electrolyte 32 Environment 30 Errors 28 Ex approval 6 F FDA conformity 7 Flow operation 11 I Icons 2 Immersion operation 11 Incoming acceptance 8 Ingress protection 31 Input 30 Installation 4 8 9 Angle of 8 Check 12 Examples 11 Flow operation 11 Immersion operation 11 Location 9 Measuring point 10 Retractable assembly 12 Intrinsic consumption 32 L Long term drift 32 M Maintenance 23 Mate...

Страница 34: ...25 Wear and tear materials 25 Response time 31 Retractable assembly 12 Return 5 30 S Safety icons 2 Scope of delivery 6 Sealing ring 25 Sensor Measuring principle 17 Replacing wear and tear materials 25 Sensor design 17 Spare parts 28 Storage 8 Storage temperature 30 Symbols 2 T Technical data 30 Environment 30 Input 30 Mechanical construction 32 Performance characteristics 31 Process 31 Transport...

Страница 35: ...aning Returned part cleaned with explosive oxidising dangerous for the environment biological risk radioactive Please tick should one of the above be applicable include safety data sheet and if necessary special handling instructions Description of failure ________________________________________________________________________ ______________________________________________________________________...

Страница 36: ...www endress com worldwide BA402C 07 en 12 07 Printed in Germany FM SGML 6 0 DT 71066660 ...

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