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Summary of Contents for Endress+Hauser Oxymax H COS21D
- Page 1 Operating Instructions Oxymax H COS21D Digital dissolved oxygen sensor BA402C/07/en/12.07 71066660...
- Page 2 Information for the use of this manual Notes on safety icons and symbols Warning! This symbol alerts you to hazards. They can cause serious damage to the instrument 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.
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Page 3: Table Of Contents
Oxymax H COS21D Table of contents Safety instructions ..4 Trouble-shooting... 28 Designated use ..... . 4 Trouble-shooting instructions . -
Page 4: Safety Instructions
Safety instructions Oxymax H COS21D Safety instructions Designated use The sensor is suitable for continuous measurement of dissolved oxygen in water. The sensor version determines what the sensor is especially suitable for: • COS21D-A (measuring range 0.01 to 20 mg/l) –... -
Page 5: Operational Safety
" Caution! • The certified oxygen sensor Oxymax H COS21D-*12*1 in combination with the measuring cable CYK10-G**1 may only be connected to 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. -
Page 6: Identification
Identification Oxymax H COS21D Identification Product structure Application, operational range Standard 0.01 to 20 mg/l Trace, beverages (CO compatible) 0.001 to 2 mg/l Trace, power plants 0.001 to 2 mg/l Shaft length 120 mm (4.72") Approvals None COS21D-A* and COS21D-C* only... - Page 7 Oxymax H COS21D Identification a0007207 Fig. 1: EC declaration of conformity 2.3.2 FDA conformity The manufacturer declares the FDA compliance of the materials used. You can download the certificates from the product page (www.endress.com). Product FDA certificate for COS21D-**1*2 Membrane, O-rings...
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Page 8: Installation
Installation Oxymax H COS21D Installation Incoming acceptance, transport, storage • Make sure the packaging is undamaged! Inform the supplier about damage to the packaging. Keep the damaged packaging until the matter has been settled. • Make sure the contents are undamaged! Inform the supplier about damage to the delivery contents. -
Page 9: Installation Instructions
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... - Page 10 Installation Oxymax H COS21D 3.3.2 Installing a measuring point For a complete installation of a measuring point, proceed as follows: Install a retractable or a flow assembly (if used) into the process. Connect the water supply to the rinse connections (if you use an assembly with cleaning function).
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Page 11: Installation Examples
Oxymax H COS21D Installation Installation examples 3.4.1 Fixed installation (CPA442) The CPA442 fixed installation assembly allows a sensor to be easily adapted to almost any process connections from Ingold nozzles to Varivent or Triclamp connections. This type of installation is very suitable for tanks and larger pipes. The sensor achieves a defined immersion depth in the medium in an easy manner →... -
Page 12: Post-Installation Check
Installation Oxymax H COS21D 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 13: Wiring
Oxymax H COS21D Wiring 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. • Ensure that there is no voltage at the power cable before beginning the connection work. -
Page 14: Sensor Version For Ex Applications
Wiring Oxymax H COS21D Sensor version for Ex applications 4.1.1 Quick wiring guide a0006059 Fig. 7: Connection in the Ex area Endress+Hauser... -
Page 15: Direct Connection To Liquiline M
Oxymax H COS21D Wiring 4.1.2 Temperature classes Note! 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 ... -
Page 16: Connection Via Junction Box
Wiring Oxymax H COS21D Connection via junction box To extend the sensor cable, the connection has to take place using a junction box RM (--> Accessories). The extension to the transmitter is established by means of the CYK81 special measuring cable. -
Page 17: Function
Oxymax H COS21D Function Function Sensor design a0005631 Fig. 11: Design Threaded connection Pg 13.5 Anode Membrane cap Protective cap Memosens plug-in head Cathode Membrane a0005619 Fig. 12: Dimensions Measuring principle 5.2.1 Polarization When the sensor is connected to the transmitter, a fixed external voltage is applied between the cathode and anode. - Page 18 Function Oxymax H COS21D Reference value for practically complete polarization of a sensor that was in storage for an extended period beforehand: • COS21D-A/C: 2 hours • COS21D-B: 12 hours After this time, measurements close to the determination limit make sense.
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Page 19: Calibration
Oxymax H COS21D Function – Date of manufacture • Calibration data – Calibration date – Calibration values – Number of calibrations – Serial number of the transmitter used to perform the last calibration • Operational data – Date of commissioning –... - Page 20 Function Oxymax H COS21D • Reference: – Offset – Slope Note! The following section only describes the calibration in air (saturated with water vapor) as the easiest method of calibration and therefore the recommended method. However, this type of calibration is only possible if the air temperature is ≥ –5 °C (23 °F).
- Page 21 Oxymax H COS21D Function [°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 2 (36) 13.83...
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Page 22: Commissioning
Commissioning Oxymax H COS21D Calculate the calibration value C: C = S Example • Air calibration at 18°C (64 °F), altitude 500 m (1650 ft) above sea level, air pressure 1009 hPa (405 inH • S = 9.45 mg/l, K = 0.943, L = 0.996 Calibration value C = 8.88 mg/l. -
Page 23: Calibration
Oxymax H COS21D Maintenance Connect the sensor to the transmitter and switch on the transmitter. Switch-on the transmitter. If you connect the sensor to the transmitter, polarization is automatically performed after switching on the transmitter. Wait for the polarization time to end. -
Page 24: Cleaning
Maintenance Oxymax H COS21D (In particular when the membrane is soiled) • If necessary, replacing wear and tear materials: – sealing ring – electrolyte – membrane cap • Check the measuring function: 1. Remove the sensor from the medium. 2. Clean and dry the membrane. -
Page 25: Replacing Wear And Tear Materials
Oxymax H COS21D Maintenance 7.1.2 Cleaning the cathode " Caution! COS21D-B: Do not clean the cathode mechanically! Polishing the cathode may cause functional errors or total failure of the sensor. COS21D-A und COS21D-C: Clean coated cathodes with a polishing sheet (included in membrane kits). - Page 26 Maintenance Oxymax H COS21D Warning! Risk of acid burns! The electrolyte is very caustic. You must follow the appropriate occupational safety regulations. Always wear protective gloves and goggles with handling electrolytes. To replace the electrolyte, proceed as follows: Remove the membrane cap.
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Page 27: Accessories
Oxymax H COS21D Accessories Accessories Connection accessories Junction box RM • For cable extension (e.g. for Memosens sensors or CUS31/CUS41) • 5 terminals • Cable entries: 2 x Pg 13.5 • Material: PC • Ingress protection: IP 65 (i NEMA 4X) •... -
Page 28: Trouble-Shooting
Trouble-shooting Oxymax H COS21D 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 29 Oxymax H COS21D Trouble-shooting • For COS21D-B: – order no. 51518701 • For COS21D-C: – order no. 51518703 Membrane kits • Membrane kit Standard, COS21/COS21D: – O-rings – membrane: silicon rubber – order no. 51505874 • Membrane kit Standard, COS21/COS21D, EN10204: –...
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Page 30: Return
Technical data Oxymax H COS21D Return If the sensor has to be repaired, please return it cleaned to the sales center responsible. Please use the original packaging, if possible. 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. -
Page 31: 10.3 Process
Oxymax H COS21D Technical data 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 •... -
Page 32: 10.5 Mechanical Construction
Technical data Oxymax H COS21D Repeatability ±1 % of measured value Zero-point drift: < 0.1 % per week at 30 °C (86 °F) Long-term drift Measuring range drift: < 0.1 % per week at 30 °C (86 °F) under constant conditions each... -
Page 33: Index
Oxymax H COS21D Index Accessories Icons........2 Assemblies . - Page 34 Oxymax H COS21D Polarization ......17, 22 Polarization time......32 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 www.endress.com/worldwide BA402C/07/en/12.07 Printed in Germany / FM+SGML 6.0 / 71066660...
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