Endress+Hauser Oxymax COS22 Operating Instructions Manual
Dissolved oxygen sensor
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- Operating instructions manual (36 pages) ,
- Brief operating instructions (20 pages)
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Summary of Contents for Endress+Hauser Oxymax COS22
- Page 1 Operating Instructions Oxymax COS22 Dissolved oxygen sensor BA446C/07/EN/01.11 71098071...
- Page 2 Notes for using this manual Warning instructions and their meaning The structure, signal words and safety colors of the signs comply with the specifications of ANSI Z535.6 ("Product safety information in product manuals, instructions and other collateral materials"). Safety message structure Meaning This symbol alerts you to a dangerous situation.
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Page 3: Table Of Contents
Accessories....25 Connection accessories ....25 Installation accessories ....25 Endress+Hauser... -
Page 4: Safety Instructions
• If faults can not be rectified, the products must be taken out of service and secured against unintentional commissioning. • Repairs not described in these Operating Instructions may only be carried out at the manufacturer’s or by the service organization. Endress+Hauser... -
Page 5: Operational Safety
Before returning the device, please clarify all formalities - such as obtaining an identification number - with your sales center. Please enclose the completed "Declaration of Hazardous Material and De-Contamination" (copy the second last page of these Operating Instructions) with the packaging and the transportation documents. No repair without completed declaration! Endress+Hauser... -
Page 6: Identification
Certificates and approvals The manufacturer declares the FDA compliance of the materials used. Ask your local sales center for the certificates. Product FDA certificate for COS22-****22 Membrane, O-rings, process sealing COS22Z-*2*2 Membrane, O-rings, process sealing COS22-****23 Membrane, O-rings COS22Z-*2*3 Membrane, O-rings Endress+Hauser... -
Page 7: Installation
The sensor must be installed with an inclination angle of at least 10 ˚ to the horizontal in an assembly, support or a corresponding process connection. Other inclination angles are not permitted. Do not install the sensor overhead. Observe the instructions for installing sensors in the Operating Instructions for the assembly used. Endress+Hauser... -
Page 8: Installation Instructions
Installation instructions 3.3.1 Measuring system A complete measuring system comprises: • A digital oxygen sensor Oxymax COS22 • A transmitter, e.g. Liquisys COM223/253F • An appropriate measuring cable, e.g. COK21 • Optional: an assembly, e.g. fixed installation assembly CPA442, flow assembly CPA240 or retractable... - Page 9 It will remain in the assembly resp. in the process then. ► Avoid exerting excessive tensile force on the cable (e.g. from jerky pulling). ► Select the installation location so that there is easy access for later calibration. Endress+Hauser...
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Page 10: Installation Examples
During trace measurement in particular, ensure the assembly is completely vented to avoid measuring errors. a0005721 Fig. 4: Bypass installation Main line Medium removal 3, 6 Manually actuated or solenoid valves Sampling Flow assembly with installed sensor a0005720 Medium return Fig. 3: CPA240 flow assembly with protective hood Endress+Hauser... - Page 11 120 mm. The assembly has a low sampling volume and, with the 6-mm connections, it is best suited for residual oxygen measurement in water treatments and boiler feedwater. The flow comes from below. a0014081 Fig. 5: Flow assembly Built-in sensor Drain Wall mount (clamp D29) Inflow Endress+Hauser...
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Page 12: Post-Installation Check
► Sensor and cable undamaged? ► Compliance with permissible sensor installation position? ► Is the sensor installed in an assembly and is not suspended from the cable? ► Avoid moisture by rain by putting the protective cap on the assembly? Endress+Hauser... -
Page 13: Wiring
Are all the screws terminals properly tightened ? Tighten Are all the cable entries installed, tightened and sealed ? For cable entries lateral: cable loops downwards for water to be able to drip off. Are all the cable entries installed downwards or lateral ? Endress+Hauser... -
Page 14: Function
Reference value for nearly complete polarization of a sensor that was previously stored for a long time: • COS22-*1: 2 hours • COS22-*3: 12 hours After this time, even measurements close to the determination limit are useful. The necessary polarization time is reduced for sensors that were in use a short time before. Endress+Hauser... -
Page 15: Calibration
20 minutes. Check that the sensor is not in direct sunlight during this time. If the measured value display on the transmitter is stable, carry out the calibration in accordance with the Operating Instructions of the transmitter. Place the sensor in the medium again. Endress+Hauser... - Page 16 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 Endress+Hauser...
- Page 17 Calibration value C = 8.88 mg/l. You do not need factor K from the table if your device returns the absolute air pressure L (location-dependent air pressure) as the measured value. Thus, the formula for calculation is: C = S Endress+Hauser...
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Page 18: Commissioning
Connect the sensor to the transmitter. Switch on the transmitter. When the sensor is connected to the transmitter, the polarization takes place automatically after the power-up of the transmitter. Wait for the polarization time to run out. Endress+Hauser... -
Page 19: Calibration
Otherwise, double the length of time to the next inspection. Proceed as per Point 1 after two, four and/or eight months. In this way, you can determine the optimum calibration interval for your sensor. Be sure to calibrate the sensor at least once a year. Endress+Hauser... -
Page 20: Maintenance
Proceed similarly after two, four and/or eight months. In this way, you can determine the optimum maintenance interval for your sensor. Particularly for widely varying process conditions, damage of the membrane can occur even within a maintenance cycle. You can recognize this by implausible sensor behavior. Endress+Hauser... -
Page 21: Cleaning The Sensor
Replacing the sealing ring Visible damage to the sealing ring Changing the electrolyte Unstable or implausible measuring signal or fouling of the electrolyte Replacing the membrane cap Membrane is damaged or can no longer be cleaned (hole or overstretching) Endress+Hauser... - Page 22 ► In case of eye contact: Remove contact lenses, flush eyes with water for a few minutes and contact a doctor. ► In case of skin contact: Take off wet clothing immediately, wash the skin or take a shower. Endress+Hauser...
- Page 23 Carefully screw on the shaft sleeve as far as it will go. After replacing the membrane cap, the sensor must be repolarized and recalibrated. Then insert the sensor into the medium and check that no alarm is displayed on the transmitter. Endress+Hauser...
- Page 24 Plug a new glass body (from the membrane kit) into the holder so that it fits. Ensure that you do not damage the electrical contact pins. Fill the membrane body with electrolyte (see preceding section), then screw the shaft sleeve back Endress+Hauser...
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Page 25: Accessories
• Technical Information TI306C/07/en Cleanfit CPA450 • Manual retractable assembly for installing 120 mm sensors in tanks and pipework • Technical Information TI183C/07/en Flow assembly for 120 mm sensors • compact stainless steel assembly with low sample volume • order no.: 71042404 Endress+Hauser... -
Page 26: Trouble-Shooting
Check electrical connection. If the problem still displayed value display now at 0? occurs, send the sensor in. Make sure you comply with the instructions for troubleshooting in the Operating Instructions of the transmitter. If necessary, carry out a test of the transmitter. Endress+Hauser... -
Page 27: Spare Parts And Consumable Material
Operating Instructions) with the packaging and the transportation documents. No repair without completed declaration! Disposal The device contains electronic components and must therefore be disposed of in accordance with regulations on the disposal of electronic waste. Please observe local regulations. Endress+Hauser... -
Page 28: Technical Data
COS22-*1 (standard sensor): 40 to 100 nA COS22-*3 (trace sensor): 210 to 451 nA 10.2.4 Zero current COS22-*1 (standard sensor): < 0.1 % of the current at air COS22-*3 (trace sensor): < 0.03 % of the current at air Endress+Hauser... -
Page 29: Environment
Compensation of the membrane properties depends on the transmitter used, recommended: 2.4 % per K 10.3 Environment 10.3.1 Storage temperature –5 to +50 ˚C (20 to 120 ˚F) at 95% relative air humidity, not condensing In accordance with IEC 61298-2 at nominal operating conditions Endress+Hauser... -
Page 30: Process
–5 to +135 ˚C (23 to 175 ˚F) 10.4.2 Process pressure ambient pressure to 12 bar (174 psi) 10.4.3 Temperature-pressure chart a0015193 Fig. 10: Temperature-pressure diagram 10.4.4 Minimum flow COS22-*1 (standard sensor): 0.02 m/s (0.07 ft/s) COS22-*3 (trace ensor): 0.1 m/s (0.33 ft/s) Endress+Hauser... -
Page 31: Mechanical Construction
Stainless steel 1.4435 (AISI 316L) (depending on version) Titane Alloy C22 Electrode combination Silver / platinum ® Sealings/O-rings Viton (FDA compliant) Process seal Perfluoro elastomer with USP88 Class VI Membrane Silicone (FDA compliant), PTFE, steel mesh 10.5.3 Process connection Thread Pg 13.5 Endress+Hauser... - Page 32 Technical data 10.5.4 Surface roughness < 0.38 μm 10.5.5 Temperature sensor NTC 22 kΩ 10.5.6 Electrolyte COS22-*1 (standard sensor): alkalescent electrolyte COS22-*3 (trace sensor): neutral electrolyte Endress+Hauser...
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Page 33: Index
Process ....... . 30 Incoming acceptance ..... . 7 Endress+Hauser... - Page 34 Process connection ..... . . 31 Process pressure ......30 Zero current .
- Page 35 Declaration of Hazardous Material and De-Contamination Please reference the Return Authorization Number (RA#), obtained from Endress+Hauser, on all paperwork and RA No. mark the RA# clearly on the outside of the box. If this procedure is not followed, it may result in the refusal of the package at our facility.
- Page 36 BA446C/07/EN/01.11 71098071...
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