Endress+Hauser OxyMax W COS 71 Bedienungsanleitung

Quality made by

Endress+Hauser

ISO 9001

BA 286C/07/en/07.01

Nr. 51506699 OxyMax W COS 71

Sensor for Measuring

Dissolved Oxygen

Operating Instructions

OxyMax W COS 71

Endress+Hauser

Table of contents

1 Safety instructions . . . . . . . . . . . . . . . . . 2

1.1 Notes on safety conventions and icons . . . . . . 2

1.2 Designated use . . . . . . . . . . . . . . . . . . . . . . . . 2

1.3 Installation, commissioning and operation . . . 2

1.4 Operational safety . . . . . . . . . . . . . . . . . . . . . . 3

1.5 Return . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

1.6 Disposal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

2 Identification . . . . . . . . . . . . . . . . . . . . . . 4

2.1 Product structure . . . . . . . . . . . . . . . . . . . . . . . 4

2.2 Scope of delivery . . . . . . . . . . . . . . . . . . . . . . . 4

3 Installation . . . . . . . . . . . . . . . . . . . . . . . . . 5

3.1 Measuring device . . . . . . . . . . . . . . . . . . . . . . 5

3.2 Installation conditions . . . . . . . . . . . . . . . . . . . 6

3.3 Installation location and position . . . . . . . . . . . 7

3.4 Sensor design and functional description . . . . 9

3.5 Post-installation check . . . . . . . . . . . . . . . . . . 11

4 Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

4.1 Direct connection to the transmitter . . . . . . . . 12

4.2 Connection via the junction box VS . . . . . . . . 12

4.3 Post-connection check . . . . . . . . . . . . . . . . . 13

5 Commissioning . . . . . . . . . . . . . . . . . . 14

5.1 Function check . . . . . . . . . . . . . . . . . . . . . . . . 14

5.2 Polarisation . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

5.3 Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

6 Maintenance . . . . . . . . . . . . . . . . . . . . . . 17

6.1 Cleaning the outside of the sensor . . . . . . . . . 17

6.2 Regeneration . . . . . . . . . . . . . . . . . . . . . . . . . 18

7 Accessories . . . . . . . . . . . . . . . . . . . . . . . 20

7.1 Connection accessories . . . . . . . . . . . . . . . . . 20

7.2 Installation accessories . . . . . . . . . . . . . . . . . 20

7.3 Spare parts kit . . . . . . . . . . . . . . . . . . . . . . . . . 20

7.4 Spare parts . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

7.5 Measurement and controlling . . . . . . . . . . . . . 20

8 Troubleshooting . . . . . . . . . . . . . . . . . . 21

8.1 Troubleshooting instructions . . . . . . . . . . . . . . 21

8.2 Sensor test . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

8.3 Spare parts . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

9 Technical data . . . . . . . . . . . . . . . . . . . . 23

Index . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

1 Safety instructions OxyMax W COS 71

2Endress+Hauser

1 Safety instructions

1.1 Notes on safety conventions and icons

#Warning!

This symbol alerts you to hazards which could cause serious injuries as well as

damage to the instrument 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.

!Note!

This symbol indicates important items of information.

1.2 Designated use

The oxygen sensor COS 71 is suitable for continuous measurement of dissolved oxygen

traces in water.

The main application is the trace measurement of dissolved oxygen in boiler feed water

of power plants.

#Warning!

•If the device is used for any application other than those described in this manual, it

may lead to unsafe and improper functioning of the measuring system and is therefore

not permitted.

•Make sure you strictly adhere to the warnings and notes in these

Operating Instructions.

•The manufacturer is not liable for damage caused by improper use or use other than

that for which it is intended.

1.3 Installation, commissioning and operation

#Warning!

•Only trained technical personnel may carry out installation, electrical connection,

commissioning, operation and maintenance of the measuring system. The technical

personnel must be authorised to do this by the system operator.

•Technical personnel must be familiar with the instructions in this manual and must

adhere to them.

•Before switching on the system, check all the connections again for correctness.

•Do not operate damaged sensors. Indicate them as being defective.

•Measuring point faults may only be remedied by authorised and trained personnel.

•If faults cannot be repaired, the measuring device must be taken out of service and

secured against unintentional commissioning.

•Repairs may only be carried out by the manufacturer or by the Endress+Hauser

service organisation.

OxyMax W COS 71 1 Safety instructions

Endress+Hauser 3

1.4 Operational safety

The COS 71 sensor is operationally reliable and is made to the state of the art.

The appropriate regulations and EC directives have been met.

As the user, you are responsible for complying with the following safety conditions:

•Explosion protection regulations

•Installation instructions

•Operating instructions for the assembly and its materials

•Local prevailing standards and regulations

1.5 Return

If the device requires repair, please send the sensor clean (see Seite 17) to the

appropriate Endress+Hauser sales offices. Please use the original packaging where

possible.

Please add the filled in »Declaration of contamination« (copy the last but one page of

this manual) to the packing of the sensor and add it also to the shipping documents.

1.6 Disposal

Defective, non-repairable sensors must be disposed of.

Please keep to the local disposal regulations!

2 Identification OxyMax W COS 71

4Endress+Hauser

2 Identification

2.1 Product structure

2.2 Scope of delivery

!Note!

•Make sure the packaging is undamaged!

Inform the post office or the courier of any damage to the packing.

Keep the damaged packaging until the matter has been cleared.

•Make sure the contents are undamaged!

Inform the post office or the courier of any damage to the delivered contents.

Keep the damaged products until the matter has been cleared.

•Use the delivery papers to check that the scope of delivery is complete.

The following items are included in the delivery:

•1 oxygen sensor COS 71 with transport protection cap for membrane protection

•Accessories set COY 31-S-Z with the following contents:

–1 spare replacement cartridge COY 31-S-WP

–10 plastic ampoules containing electrolyte COY 3-F

–1 sealing kit COY 31-OR with 3 O-rings

–6 polishing sheets

•Operating Instructions BA 286C/07/en

If you have questions, please contact your supplier or your nearest

Endress+Hauser sales office (see the back page of this Operating Instructions).

Certifikate

A Version for non-hazardous area

Cable length

0 Connection cable 1,5 m

2 Connection cable 7 m

4 Connection cable 15 m

8 Cable not included (only for TOP 68 version)

9 Special version

Cable connection

F Fixed cable connection

S Cable connection via TOP 68 connector (only when using Liquisys M COM 223/253-WX/WS)

COS 71- Complete order code

OxyMax W COS 71 3 Installation

Endress+Hauser 5

3Installation

3.1 Measuring device

A complete measuring system comprises:

•Oxygen sensor OxyMax W COS 71

•Oxygen transmitter Liquisys M COM 223/253-WX/WS

Optional:

•Flow assembly FlowFit W COA 260

•Junction box VS

Fig. 3.1: Complete measuring device for COS 71 with Liquisys M COM 223/253-WX/WS

1 Junction box VS (only if cable extension required)

2 Transmitter Liquisys M COM 223/253-WX/WS

3 Flow assembly COA 260

4 Oxygen sensor COS 71

C07-COS71xxx-14-05-00-xx-001.EPS

3 Installation OxyMax W COS 71

6Endress+Hauser

3.2 Installation conditions

3.2.1 Installation dimensions

Fig. 3.2: Dimensions COS 71

fixed cable version

Fig. 3.3: COS 71 with TOP 68 plug-in head and

TOP 68 plug-in cable

220

Ø40

186

C07-COS31xxx-06-05-00-xx-001.EPS

C07-COS31xxx-06-05-00-xx-002.EPS

OxyMax W COS 71 3 Installation

Endress+Hauser 7

3.3 Installation location and position

The sensor can be installed up to the horizontal in an assembly, support or a suitable

process connection (Fig. 3.4). Other angles are not permissible. Do not install the

sensor overhead.

Permissible installation .

Fig. 3.4: Permissible installation positions for the COS 71 oxygen sensor

!Note!

Make sure you comply with the instructions for installing sensors. You will find them in

the Operating Instructions for the assembly used.

Installing a

measuring point

For a complete installation of a measuring point, proceed as follows:

1. Installing the flow assembly.

2. Installing and connecting the oxygen sensor.

"Caution!

•Screw the sensor into the assembly so that the cable is not twisted.

•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.

#Warning!

When using metallic assemblies and installation equipment, comply with national

grounding regulations.

3.3.1 Installation example

Flow operation

Install the COA 260 flow assembly acc. to Fig. 3.5 to ensure a total height of 540 mm for

sensor installation or removal. The inlet is at the bottom of the assembly, the outlet lateral

of the assembly. If necessary use devices for cooling the medium resp. for pressure

minimisation to ensure not to exceed the maximum permissible values of 50 °C

resp. 10 bar.

C07-COS31xxx-11-05-00-en-001.EPS

Permissible angle of installation

3 Installation OxyMax W COS 71

8Endress+Hauser

Please pay attention to the following notes if the assembly is used in a pressure system

with reflow (Fig. 3.6) instead of free outlet:

"Caution!

For pressures > atmospheric pressure

•Pressurisation and work at a constant overpressure up to 10 bar poses no problems.

•Rapid pressure loss at the measuring point leads to air degassing in the electrolyte

due to the sudden reductions in solubility. This could lead to a swelling of the sensor

membrane.

Avoid this problem by keeping up the pressure on the sensor. In the case of rapid

pressure loss e.g. during maintenance work on the pipeline close all the valves

(manual mode: manually actuated valves, automatic mode: solenoid valves, see Fig.

3.6, Pos. 4 and 5) of the assembly.

Fig. 3.5: Flow assembly COA 260 Fig. 3.6: Bypass installation with manually

actuated valves or solenoid valves

1 Cap 1 Main line

2 Pressing screw 2 Medium return

3 Intermediary 3 Flow assembly COA 260

4 Flow vessel 4, 5 Manually actuated or solenoid valves

6 Flow assembly COA 250-A

6 Medium removal

Ø60

400

C07-COA260xx-11-07-00-xx-001.EPS

Required

total height

for sensor

installation or

removal

540 mm

C07-COA260xx-11-05-00-xx-001.EPS

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