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Summary of Contents for Endress+Hauser Memosens COS51E
- Page 1 Products Solutions Services BA02146C/07/EN/02.22-00 71556090 2022-01-19 Operating Instructions Memosens COS51E Amperometric oxygen sensor with Memosens 2.0 technology...
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Page 3: Table Of Contents
Memosens COS51E Table of contents Table of contents Maintenance tasks ..... 30 About this document ....4 Warnings . -
Page 4: About This Document
About this document Memosens COS51E About this document Warnings Structure of information Meaning This symbol alerts you to a dangerous situation. DANGER Failure to avoid the dangerous situation will result in a fatal or serious Causes (/consequences) injury. If necessary, Consequences of non-compliance (if applicable) ‣... -
Page 5: Supplementary Documentation
Memosens COS51E About this document Supplementary documentation The following manuals which complement these Operating Instructions can be found on the product pages on the Internet: • Technical Information for the relevant sensor • Operating Instructions for the transmitter used • Operating Instructions for the cable used •... -
Page 6: Basic Safety Instructions
Basic safety instructions Memosens COS51E Basic safety instructions Requirements for the 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. -
Page 7: Product Safety
Memosens COS51E Basic safety instructions During operation: ‣ If faults cannot be rectified: products must be taken out of service and protected against unintentional operation. CAUTION Cleaning not switched off during calibration or maintenance activities Risk of injury due to medium or cleaning agent! ‣... -
Page 8: Product Description
Product description Memosens COS51E Product description Product design A0046012 2 Sensor head, sectional drawing Membrane Electrolyte Anode Reference electrode Screw thread for protection guard Sealing ring Screw thread for membrane cap Membrane cap A0046006 A0046014 1 Sensor structure ... -
Page 9: Measuring Principle
Memosens COS51E Product description Measuring principle 3.2.1 Amperometric measuring principle During amperometric oxygen measurement, oxygen molecules diffuse through the membrane and are reduced to hydroxide ions (OH-) at the working electrode. At the counter-electrode, silver is oxidized to silver ions (Ag+) (this forms a silver halide layer). - Page 10 Product description Memosens COS51E Digital sensors can store measuring system data (among other types of data) in the sensor: • Manufacturer data • Serial number • Order code • Date of manufacture • Digital sensor label • Calibration data of the last eight calibrations including factory calibration with calibration date and calibration values •...
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Page 11: Incoming Acceptance And Product
Memosens COS51E Incoming acceptance and product identification Incoming acceptance and product identification Incoming acceptance 1. Verify that the packaging is undamaged. Notify the supplier of any damage to the packaging. Keep the damaged packaging until the issue has been resolved. -
Page 12: Scope Of Delivery
• Safety instructions for the hazardous area (for sensors with Ex approval) • Brief Operating Instruction • Optional: cleaning unit • Optional: replacement caps If you have any questions, please do not hesitate to contact the the Endress+Hauser sales team. Endress+Hauser... -
Page 13: Mounting
Memosens COS51E Mounting Mounting Mounting requirements 5.1.1 Dimensions Ø40 (1.57) A0045976 4 Dimensions in mm (inch) Endress+Hauser... -
Page 14: Mounting The Sensor
Mounting the sensor 5.2.1 Measuring system A complete measuring system comprises: • a Memosens COS51E oxygen sensor • A transmitter, e.g. Liquiline CM44 • a measuring cable, e.g. CYK10 • optional: an assembly, e.g. immersion assembly CYA112 or retractable assembly COA451 •... - Page 15 Memosens COS51E Mounting A0045977 6 Example of a measuring system with Memosens COS51E Oxygen sensor Memosens COS51E Retractable assembly COA451 Measuring cable CYK10 Liquiline CM44 5.2.2 Installing at a measuring point Install assemblies away from the basin on a solid base. Only the final stage of assembly should be performed at the intended mounting location.
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Page 16: Installation Examples
Mounting Memosens COS51E 3. Install the suspended or immersion assembly in the process 4. Supply power to the transmitter NOTICE Installation fault Cable open circuit, loss of sensor due to cable separation, unscrewing of membrane cap in the assembly! ‣... - Page 17 Memosens COS51E Mounting 5.3.2 Immersion operation Universal holder and chain assembly A0042857 A0042858 8 Chain holder on railing 9 Chain holder on upright post Chain Weather protection cover CYY101 Holder Flexdip CYH112 Transmitter Rail Chain Basin rim Wastewater assembly Flexdip CYA112...
- Page 18 Mounting Memosens COS51E Basin rim mounting with immersion tube A0042860 11 Basin rim mounting Pendulum holder CYH112 Assembly Flexdip CYA112 Assembly float Oxygen sensor Basin rim Float The CYA112 float is for use in the case of large fluctuations in water level, for example in rivers or lakes.
- Page 19 Memosens COS51E Mounting A0030570 A0013319 14 Bypass installation with manually actuated valves or solenoid 13 COA250 valves Main pipe Medium return Oxygen sensor 4, 7 Manually actuated or solenoid valves Flow assembly COA250-A 90 ° pipe elbow Medium removal 5.3.4...
- Page 20 Mounting Memosens COS51E A0032920 16 Connection diagram Main pipe Medium inflow Manually actuated or solenoid valves Flow assembly Medium outlet Medium removal Medium return Mount the sensor in the assembly in accordance with the Operating Instructions (BA00495C). There must be a minimum flow rate of 100 ml/h (0.026 gal/h).
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Page 21: Post-Mounting Check
Memosens COS51E Mounting Post-mounting check 1. Are the sensor and cable undamaged? 2. Is the orientation correct? 3. Is the sensor installed in an assembly and is not suspended from the cable? 4. Avoid the penetration of moisture. Endress+Hauser... -
Page 22: Electrical Connection
Electrical connection Memosens COS51E Electrical connection WARNING 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. -
Page 23: Commissioning
The oxygen measuring point is then ready to measure. After commissioning, maintain the sensor at regular intervals to ensure reliable measurement. • Operating Instructions for Memosens COS51E, BA02146C • Operating Instructions for the transmitter used, such as BA01245C if using the Liquiline CM44x or Liquiline CM44xR. -
Page 24: Calibration And Adjustment
Commissioning Memosens COS51E 5. Wait for the polarization time to elapse . Calibration and adjustment During calibration, the measured value is compared to the value expected under specified conditions (depending on the calibration method, e.g. in air with 100% rh at sea level). - Page 25 Memosens COS51E Commissioning NOTICE Incorrect measurements caused by atmospheric influences! ‣ Protect the sensor against external influences such as sunlight and wind. ‣ Prior to calibration, adjust the atmospheric pressure if it does not match the process pressure. After 20 minutes, measure the oxygen saturation index in air.
- Page 26 Commissioning Memosens COS51E Table 1 [˚C (˚F)] [mg/l=ppm] [˚C (˚F)] [mg/l=ppm] [˚C (˚F)] [mg/l=ppm] [˚C (˚F)] [mg/l=ppm] 0 (32) 14.64 11 (52) 10.99 21 (70) 8.90 31 (88) 7.42 1 (34) 14.23 12 (54) 10.75 22 (72) 8.73 32 (90) 7.30...
- Page 27 Memosens COS51E Commissioning Example • Air calibration at 18 °C (64 °F), altitude 500 m (1650 ft) above sea level, current air pressure 1009 hPa • S = 9.45 mg/l, K = 0.943, L = 0.996, M=1.02 • Calibration value C = 9.05 mg/l.
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Page 28: Diagnostics And Troubleshooting
Diagnostics and troubleshooting Memosens COS51E Diagnostics and troubleshooting Checking the sensor Only authorized and trained personnel may test the sensor. A multimeter (voltage, resistance) is required for testing. Test Required action Set point Slope check Expose the sensor to air and dry with a paper towel. - Page 29 2. Dry the electrodes. Does the transmitter display 0? If the transmitter does not display 0: 3. Check the electrical connection. Does the transmitter display 0? If the transmitter does not display 0: 4. Contact the Endress+Hauser Service department. Endress+Hauser...
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Page 30: Maintenance
Maintenance Memosens COS51E Maintenance Take all the necessary precautions in time to ensure the operational safety and reliability of the entire measuring system. NOTICE Effects on process and process control! ‣ When carrying out any work on the system, bear in mind any potential impact this could have on the process control system and the process itself. - Page 31 Memosens COS51E Maintenance Clean the sensor: • Before every calibration • At regular intervals during operation as necessary • Before returning it for repair Type of contamination Cleaning Salt deposits Immerse the sensor in drinking water. Then rinse it with copious amounts of water.
- Page 32 Maintenance Memosens COS51E A0046400 A0046398 2. Moisten the polishing foil (green and pink) with a drop of electrolyte. 3. Clean the cathode surface with the green polishing foil. Hold the sensor as vertically as possible. Move the cathode in small circles over the polishing foil.
- Page 33 Memosens COS51E Maintenance 6. Mount the sensor → 37. Endress+Hauser...
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Page 34: Repair
The product must be returned if repairs or a factory calibration are required, or if the wrong product was ordered or delivered. As an ISO-certified company and also due to legal regulations, Endress+Hauser is obliged to follow certain procedures when handling any returned products that have been in contact with medium. - Page 35 Memosens COS51E Repair CAUTION The standard electrolyte is a strong irritant Danger of severe skin and eye irritation! ‣ Be absolutely certain to observe the corresponding workplace safety regulations. ‣ Wear protective gloves and goggles when handling the electrolyte. ‣...
- Page 36 Repair Memosens COS51E A0046343 A0046415 3. Remove the old O-ring. 4. Carefully pull the new O-ring into position. 5. Mount the sensor → 37. 10.3.3 Replacing the electrolyte The electrolyte is used up slowly during operation. This is caused by electrochemical substance reactions.
- Page 37 Memosens COS51E Repair 2. Dispose of the old electrolyte. 3. Install the sensor with fresh electrolyte → 37. 10.3.4 Mounting the sensor CAUTION The standard electrolyte is a strong irritant Danger of severe skin and eye irritation! ‣ Be absolutely certain to observe the corresponding workplace safety regulations.
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Page 38: Checking The Measurement Function
(WEEE), the product is marked with the depicted symbol in order to minimize the disposal of WEEE as unsorted municipal waste. Do not dispose of products bearing this marking as unsorted municipal waste. Instead, return them to Endress+Hauser for disposal under the applicable conditions. -
Page 39: Accessories
Memosens COS51E Accessories Accessories The following are the most important accessories available at the time this documentation was issued. ‣ For accessories not listed here, please contact your Service or Sales Center. 11.1 Device-specific accessories 11.1.1 Assemblies (selection) Flowfit CYA251 •... - Page 40 Accessories Memosens COS51E Memosens data cable CYK11 • Extension cable for digital sensors with Memosens protocol • Product Configurator on the product page: www.endress.com/cyk11 Technical Information TI00118C 11.1.3 Cleaning Compressed air cleaning for COSXX • Connection: OD 6/8 mm (incl. reduction hose coupling) or OD 6.35 mm (¼") •...
- Page 41 Memosens COS51E Accessories Liquiline Compact CM72 • 1-channel single parameter field device for Memosens sensors • Ex- and non-ex applications possible in all industries • Product Configurator on the product page: www.endress.com/CM72 Technical Information TI01409C Memobase Plus CYZ71D • PC software to support laboratory calibration •...
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Page 42: Technical Data
Technical data Memosens COS51E Technical data 12.1 Input Measured variables Dissolved oxygen [mg/l, µg/l, ppm, ppb, %SAT, %Vol, ppmVol] Temperature [˚C, ˚F] measuring range • 0 to 100 mg/l • 0 to 2000 hPa • 0.00 to 1000 % SAT 12.2... -
Page 43: Environment
Memosens COS51E Technical data Maximum measured COS51E-****TN (black membrane cap): ≤ ±1 % of the measured value error COS51E-****TF (white membrane cap): ≤ ±1 % of the measured value COS51E-****TN (black membrane cap): 10 ppb Limit of detection (LOD) COS51E-****TF (white membrane cap):... -
Page 44: Mechanical Construction
Technical data Memosens COS51E Process pressure range 5 bar (72.5 psi) abs. 12.6 Mechanical construction Dimensions Ø40 (1.57) A0045976 20 Dimensions in mm (inch) Weight 0.3 kg (0.7 lbs) Materials Parts in contact with medium Sensor shaft Membrane cap... - Page 45 Memosens COS51E Technical data Membrane thickness • COS51D-***0*: Approx. 50 μm • COS51D-***1*: Approx. 25 μm Endress+Hauser...
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Page 46: Index
Index Memosens COS51E Index Mechanical construction ..... . 44 Mounting ....... . . 13 Accessories . - Page 48 *71556090* 71556090 www.addresses.endress.com...
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