Endress+Hauser Oxymax COS22D Operating Instructions Manual
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Endress+Hauser Oxymax COS22D Operating Instructions Manual

Dissolved oxygen sensor
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Operating Instructions
Oxymax COS22D
Dissolved oxygen sensor
BA00447C/07/EN/02.12
71153853

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Summary of Contents for Endress+Hauser Oxymax COS22D

  • Page 1 Operating Instructions Oxymax COS22D Dissolved oxygen sensor BA00447C/07/EN/02.12 71153853...
  • 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.

  • Page 3: Table Of Contents

    Oxymax COS22D Table of contents Safety instructions ..4 Trouble-shooting... 31 Designated use ..... . 4 Trouble-shooting instructions .

  • Page 4: Safety Instructions

    Safety instructions Oxymax COS22D Safety instructions Designated use The oxygen sensor is suitable for continuous measurement of dissolved oxygen in water. The specific suitability depends on the sensor design: • COS22D-*1 (standard, measuring range 0.01 to 60 mg/l) – Measuring, monitoring and regulating the oxygen content in fermenters –...

  • Page 5: Installation, Commissioning And Operation

    Oxymax COS22D Safety instructions Installation, commissioning and operation Please note the following items: • Installation, commissioning, operation and maintenance of the measuring system must only be carried out by trained technical personnel. Trained personnel must be authorized for the specified activities by the system operator.

  • Page 6: Identification

    Identification Oxymax COS22D Identification Order code To find out the version of your device, enter the order code indicated on the nameplate in the search screen at the following address: www.products.endress.com/order-ident Scope of delivery The following items are included in the delivery: •...
  • Page 7 Oxymax COS22D Identification a0014925 Fig. 1: EC declaration of conformity Endress+Hauser...
  • Page 8 Identification Oxymax COS22D 2.3.2 FDA conformity The manufacturer declares the FDA compliance of the materials used. Ask your local sales center for the certificates. Product FDA certificate for 22D-****22 Membrane, O-rings, process sealing COS22Z-*2*2 Membrane, O-rings, process sealing 22D-****23 Membrane, O-rings...

  • Page 9: Installation

    Oxymax COS22D Installation Installation Incoming acceptance, transport, storage ► Make sure the packaging is undamaged! ► Inform the supplier about any damage to the packaging. Keep the damaged packaging until the matter has been settled. ► Make sure the contents are undamaged! ►...

  • Page 10: Installation Instructions

    Installation instructions 3.3.1 Measuring system A complete measuring system comprises: • A digital oxygen sensor Oxymax COS22D • A transmitter, e.g. Liquiline CM42 • An measuring cable CYK10 • Optional: an assembly, e.g. fixed installation assembly CPA442, flow assembly CPA240 or retractable...

  • Page 11: Installation Examples

    Oxymax COS22D Installation 3.3.2 Installing a measuring point WARNING Voltage In case of faults not-grounded, metalic assemblies may be energized ► When using metallic assemblies and installation equipment, comply with national grounding regulations. For a complete installation of a measuring point, proceed as follows: Install a retractable or a flow assembly (if used) into the process.
  • Page 12 Installation Oxymax COS22D 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.
  • Page 13 Oxymax COS22D Installation Flow assembly for water treatment applications The compact stainless steel assembly (see "Accessories") offers space for a 12-mm sensor with a length of 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.

  • Page 14: Post-Installation Check

    Installation Oxymax COS22D 3.4.3 Retractable assembly (CPA475 or CPA450) The assembly is designed for installation on tanks and pipes. Suitable nozzles must be available for this. Install the assembly at places with constant flow. The minimum pipe diameter is DN 80.

  • Page 15: Wiring

    Sensor design for hazardous area applications 4.1.1 Quick wiring guide The inductive sensor-cable-plug-in system Memosens, consisting of • oxygen sensor Oxymax COS22D-BA**** and • measuring cable CYK10-G**1 is suitable for the use in explosion-hazardous areas acc. to the type-examination certificate BVS 04 ATEX E 121 X .
  • Page 16 Wiring Oxymax COS22D a0010056 Fig. 8: Connection in hazardous locations Endress+Hauser...

  • Page 17: Connection To The Transmitter

    Oxymax COS22D Wiring 4.1.2 Temperature classes If the ambient temperatures indicated are observed, no temperatures which are impermissible for the temperature class in question will occur at the sensor. Temperature class Ambient temperature T –5 ... +135 ˚C –5 ... +120 ˚C –5 ...

  • Page 18: Function

    Function Oxymax COS22D Function Measuring principle 5.1.1 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 (this forms a silver halogenide layer).
  • Page 19 Oxymax COS22D Function 5.1.3 Memosens technology The sensor is connected to the cable connection (CYK10) without contact. The power and data are transferred inductively Once connected to the transmitter, the data saved in the sensor are read digitally. You can call up these data using the corresponding DIAG menu.

  • Page 20: Calibration

    Function Oxymax COS22D Calibration Calibration is a means of adapting the transmitter to the characteristic values of the sensor. Normally, sensor calibration is seldom necessary. It is necessary after: • First commissioning • Replacing a membrane or electrolyte • Long breaks in operation without power supply Within the framework of system monitoring and supervision, for example, the calibration can also be cyclically monitored (at typical time intervals, depending on operating experience) or renewed.
  • Page 21 Oxymax COS22D Function 5.2.3 Calculation example for the calibration value As a check, you can calculate the expected calibration value (transmitter display) as shown in the following example (salinity is 0). Determine: – The ambient temperature for the sensor (air temperature for "air" calibration method,water temperature for "air-saturated water"...
  • Page 22 Function Oxymax COS22D Altitude Altitude Altitude Altitude [m (ft)] [m / ft] [m / ft] [m / ft] 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...

  • Page 23: Commissioning

    Oxymax COS22D Commissioning Commissioning Function check Before first commissioning, check if: • the sensor is correctly installed • the electrical connection is correct. If using an assembly with automatic cleaning, check the correct connection of the cleaning agent (e.g. water or air).

  • Page 24: Calibration

    Commissioning Oxymax COS22D Calibration Calibrate the sensor (air calibration) immediately after the polarization time has elapsed. The calibration intervals depend heavily on: • The application and • The installation position of the sensor. The following methods help you determine how long the calibration intervals should be: 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.

  • Page 25: Maintenance

    Oxymax COS22D Maintenance Maintenance Maintenance tasks The following tasks are mandatory: • Cleaning the sensor • Replace wear parts or consumables: – Electrolyte – Membrane body – Sealing ring • Check the measuring function: 1. Remove the sensor from the medium.

  • Page 26: Cleaning The Sensor

    Maintenance Oxymax COS22D Cleaning the sensor The measurement can be corrupted by sensor fouling or malfunction, e.g.: • --> cause longer response times and a reduced slope under certain circumstances. 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.
  • Page 27 Oxymax COS22D Maintenance a0011869 Fig. 11: Exploded view Plug-in head Membrane body Process sealing 10.77 x 2.62 mm Pressure ring Shaft cover Process connection Pg 13.5 Sensor shaft Glass body with cathode and anode O-ring 8.5 x 1.5 mm 7.4.1 Replacing the sealing ring The sealing ring must be replaced if visibly damaged.
  • Page 28 Maintenance Oxymax COS22D Generally, the following applies: • The membrane cap must be replaced if: – It is damaged. – It is stretched. This makes the produced sensor currents too small. • Changing the electrolyte is mandatory if the membrane body is detached.
  • Page 29 Oxymax COS22D Maintenance 7.4.3 Replacing the glass body with the cathode NOTICE Polishing the cathode can cause impaired function or total failure of the sensor. ► Do not clean the cathode mechanically. If the cathode is coated, replace the glass body.

  • Page 30: Accessories

    Accessories Oxymax COS22D Accessories Connection accessories Junction box RM • For cable extension (e.g. for Memosens sensors) • 5 terminals • Cable entries: 2 x Pg 13.5 • Material: PC • Ingress protection: IP 65 • Order no.: 51500832 CYK10 Memosens data cable •...

  • Page 31: Trouble-Shooting

    Oxymax COS22D Trouble-shooting Trouble-shooting Trouble-shooting instructions If any of the following problems occur, test the measuring device as indicated. Problem Check Remedial action Mains voltage to the transmitter? Connect mains voltage. Sensor connected correctly? Set up correct connection. No display, no Medium flow available? Create flow.

  • Page 32: Spare Parts And Consumable Material

    The device must be returned if repairs or a factory calibration are required, or if the wrong device has been ordered or delivered. According to legal regulations, Endress+Hauser, as an ISO-certified company, is required to follow certain procedures when handling returned products that are in contact with medium.

  • Page 33: Technical Data

    Oxymax COS22D Technical data Technical data 10.1 Input 10.1.1 Measured variable Dissolved oxygen [mg/l, μg/l, ppm, ppb, % SAT or hPa] Temperature [˚ C, ˚F) 10.1.2 Measuring range All ranges refer to 20 ˚C (68 ˚F) and 1013 hPa (15 psi).
  • Page 34 Technical data Oxymax COS22D 10.2.5 Measured value resolution COS22D-*1 (standard sensor): 10 ppb in liquids, 0.2 hPa or 0.02 Vol% in gaseous media COS22D-*3 (trace sensor): 1 ppb in liquids, 0.02 hPa or 0.002 Vol% in gaseous media equals the recommended resolution at the transmitter 10.2.6 Maximum measured error...

  • Page 35: Environment

    Oxymax COS22D Technical data 10.2.13 Temperature compensation Compensation of the membrane properties is realized in the transmitter from 0 to 90˚C (32 to 194 ˚F), extrapolation from 90˚C (194 ˚F) • Measured variable as partial pressure [hPa] or in Vol%: -5 to 90 ˚C (23 to 194 ˚F) •...
  • Page 36 Technical data Oxymax COS22D 10.4.3 Temperature-pressure chart a0015193 Fig. 13: Temperature-pressure diagram 10.4.4 Minimum flow COS22D-*1 (standard sensor): 0.02 m/s (0.07 ft/s) COS22D-*3 (trace sensor): 0.1 m/s (0.33 ft/s) 10.4.5 Chemical resistance Parts in contact with medium are chemically resistent against: •...

  • Page 37: Mechanical Construction

    Oxymax COS22D Technical data 10.5 Mechanical construction 10.5.1 Weight Depending on version (length) 0.2 kg (0.44 lbs) to 0.7 kg (1.54 lbs) 10.5.2 Materials In contact with medium Sensor shaft Stainless steel 1.4435 (AISI 316L) (depending on version) Titane Alloy C22...

  • Page 38: Index

    Oxymax COS22D Index Accessories Immersion operation ..... 11 Assemblies ......30 Incoming acceptance .
  • Page 39 Oxymax COS22D Performance characteristics....33 Warning instructions ..... . . 2 Polarization .
  • Page 40 BA00447C/07/EN/02.12...

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Oxymax cos22d-ba

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