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Summary of Contents for Endress+Hauser Oxymax H COS21D
- Page 1 Operating Instructions Oxymax H COS21D Dissolved oxygen sensor BA402C/07/en/02.06 71006960...
- Page 2 If faults occur during operation, use the checklist to locate the cause. Æ Æ Index → ä 28 You can find important terms and keywords on the individual sections here. Use the keyword index to find the information you need quickly and efficiently. Endress+Hauser...
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Page 3: Table Of Contents
Oxymax H COS21D Table of contents Safety instructions ....4 Technical data ....25 Designated use . -
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 0.05 to 20 mg/l) –... -
Page 5: Return
Oxymax H COS21D Safety instructions Return If the sensor has to be repaired, please return it cleaned to the sales centre 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 6: Identification
Identification Oxymax H COS21D Identification Product structure Application, operational range Standard 0.05 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 Approvals None ATEX/FM (ATEX II 1G EEX ia IIC T3/T4/T6, COS21D-A* only) -
Page 7: Installation
Oxymax H COS21D Installation 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 8: 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 9: Installation Examples
Oxymax H COS21D Installation Installation examples 3.4.1 Fixed installation 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 10: Post-Installation Check
Installation Oxymax H COS21D 3.4.3 Retractable assembly 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. a0005722-en Fig. -
Page 11: 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 12: Direct Connection To Liquiline M
Wiring Oxymax H COS21D 4.1.2 Temperature classes Temperature class Ambient temperature T –10 ... +135 °C –10 ... +110 °C –10 ... +60 °C Reference temperature T +25 °C Note! If the ambient temperatures indicated are observed, no temperatures which are impermissible for the temperature class in question will occur at the sensor. -
Page 13: Connection Via Junction Box
Oxymax H COS21D Wiring Connection via junction box To extend the sensor connection beyond the length of the fixed 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 14: Function
Function Oxymax H COS21D Function Sensor design a0005631 Fig. 10: Design Threaded connection Pg 13.5 Anode Membrane cap Protective cap Memosens plug-in head a0005619 Cathode Fig. 11: Dimensions Membrane 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 15: Calibration
Oxymax H COS21D Function The sensor is supplied with a standard membrane cap which can be used for all common applications. The membrane cap is pretensioned at the factory and can be installed directly. There are also special membrane cap kits as an option (--> Accessories): •... - Page 16 Function Oxymax H COS21D 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 measurement results in the trace range.
- Page 17 Oxymax H COS21D Function Define: – the saturation value S acc. to the first table – the factor K acc. to the second table ° C / °F ° C / °F ° C / °F ° C / °F...
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Page 18: Commissioning
Commissioning Oxymax H COS21D 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 water connection at the assembly rinse connection. -
Page 19: Maintenance
Oxymax H COS21D Maintenance Maintenance Maintenance work must carried out at regular intervals. To ensure that it is carried out, we recommend you enter the maintenance dates into an operations logbook or in an operations calendar in advance. The maintenance cycle primarily depends on the system, the installation conditions and the medium in which measurement is taking place. -
Page 20: Regenerating The Sensor
Maintenance Oxymax H COS21D Regenerating the sensor Parts of the sensor will suffer wear and tear during operation. Suitable action can restore normal operating functionality. This action includes: Action Cause Cleaning the cathode soiled or plated cathode Replacing the sealing ring... - Page 21 Oxymax H COS21D Maintenance Using the pipette supplied, fill approx. 1.5 ml (0.05 fl.oz.) of electrolyte into the membrane cap. Hold the sensor body straight and carefully screw the membrane cap onto it until the stop. Reset the membrane cap counter (Liquiline calibration menu, "Cap replacement").
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Page 22: Accessories
Accessories Oxymax H COS21D Accessories Connection accessories • Junction box RM to lengthen the cable for Memosens or CUS31/CUS41, IP 65, with 2 x PG 13.5 order no. 51500832 • CYK10 Memosens data cable For digital pH sensors with Memosens technology (CPSxxD) Ordering according to product structure, see Technical Information (TI376C/07/en) •... -
Page 23: Trouble-Shooting
Oxymax H COS21D 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 sensor Medium flow available? Create flow. -
Page 24: Spare Parts And Consumable Material
Trouble-shooting Oxymax H COS21D Spare parts and consumable material Electrolyte solutions • For COS21D-A: – order no. 51505873 • For COS21D-B: – order no. 51518701 • For COS21D-C: – order no. 51518703 Membrane kits • Membrane kit Standard, COS21/COS21D: – order no. 51505874 •... -
Page 25: Technical Data
Oxymax H COS21D Technical data Technical data 10.1 Input 10.1.1 Measured variable Dissolved oxygen [mg/l, % SAT, hPa] Temperature [° C, ° F] 10.1.2 Measuring range Measuring range Recommended operational range COS21D-A 0.05 to 20 mg/l 0.05 to 20 mg/l... -
Page 26: Performance Characteristics
Technical data Oxymax H COS21D 10.4 Performance characteristics 10.4.1 Response time From air to nitrogen at 25 °C (77 °F) • t : < 30 s • t : < 60 s 10.4.2 Reference operating conditions Reference temperature: 25 °C (77 °F) -
Page 27: Mechanical Construction
Oxymax H COS21D Technical data 10.4.11 Oxygen depletion (intrinsic consumption) • COS21D-A: Approx. 20 ng/h in air at 25 °C (77 °F) • COS21D-B and COS21D-C: Approx. 100 ng/h in air at 25 °C (77 °F) 10.5 Mechanical construction 10.5.1 Weight 0.2 kg (0.44 lbs) -
Page 28: Index
Oxymax H COS21D Index Accessories Long-term drift ....... . . 26 Assemblies . - Page 29 Oxymax H COS21D Technical data........25 Environment ....... . 25 Input .
- Page 30 Oxymax H COS21D Endress+Hauser...
- Page 32 www.endress.com/worldwide BA402C/07/en/02.06 Printed in Germany / FM+SGML 6.0 / DT 71006960...
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