Mettler Toledo InPro6000G Series Gas Phase Oxygen Sensors Mode d'emploi

InPro 6000G Series

Gas Phase Oxygen Sensors

Instruction manual

Bedienungsanleitung

Instructions d’utilisation

InPro 6000 G Series

52 206 477 E

2 InPro 6800G/6850iG/6900iG/6950iGO

2

12 mm

InPro 6000 G Series © 12 /18 Mettler-Toledo GmbH

52 206 477 E Printed in Switzerland

English Page 3

Deutsch Seite 45

Français Page 85

manual may be repro duced in any form, or modified, copied or distributed using

electronic systems, in particular in the form of photo copies, photographs, magnetic

or other recordings, without written consent of Mettler-Toledo GmbH, Process Analytics,

CH-8902 Urdorf, Switzerland.

InDip, InFit, InPro, ISM, and InTrac are registered trademarks

of the Mettler Toledo Group in Switzerland and a further twel-

ve countries.

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InPro 6800G/6850iG/6900iG/6950iG O

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1 Introduction.....................................................................4

2 Important notes ...............................................................5

2.1 Notes on operating instructions ..........................................5

2.2 Intended use ....................................................................6

2.3 Safety instructions.............................................................6

2.4 Correct disposal of the sensor ............................................9

2

.5 Examples of some typical applications................................9

2.6 Use in Ex-zones ...............................................................9

2.7 Ex-classification ATEX .....................................................10

2.7.1 Introduction....................................................................10

2.7.2 Rated data .....................................................................10

2.7.3 Special conditions...........................................................11

2.8 Ex-classification – FM approved .......................................12

2.8.1 Introduction....................................................................12

2.8.2 Rated data ....................................................................13

2.8.3 Special conditions...........................................................13

3 Product description........................................................15

3.1 General information ........................................................15

3.2 Principle ........................................................................15

3.3 Enhanced diagnostics (only for ISM types available) ..........17

3.4 Scope of delivery ............................................................18

3.5 Equipment features .........................................................19

4 Installation....................................................................20

4.1 Mounting the sensor........................................................20

4.2 Connection ....................................................................20

4.2.1 Connecting the sensor to a AK9 cable ...............................20

4.2.2 Connecting the cable to the transmitter ..............................21

5 Operation......................................................................22

5.1 Start-up and polarizing....................................................22

5.2 Calibration .....................................................................23

5.2.1 Purpose of calibration .....................................................23

5.2.2 What you have to know for calibration ..............................23

5.2.3 Single point calibration....................................................24

5.2.4 Dual point calibration......................................................24

6 Maintenance .................................................................25

6.1 Inspection of the sensor...................................................25

6.1.1 Visual inspection ............................................................25

6.1.2 Using the METTLER TOLEDO O2 sensor master ..................26

6.1.3 Testing the sensor via a transmitter...................................27

6.1.4 ISM design.....................................................................28

6.2 Changing the electrolyte,

the membrane body or the interior body ............................29

7 Storage.........................................................................32

8 Product specification .....................................................32

8.1 Certificates .....................................................................32

8.2 Specifications.................................................................33

9 Ordering information .....................................................35

9.1 Sensors .........................................................................35

9.2 Transmitter.....................................................................35

9.3 Accessoires....................................................................35

9.4 Spare parts ....................................................................36

9.5 Cables...........................................................................36

9.6 Recommended housings .................................................36

10 Theory of the polarographic sensor.................................37

10.1 Introduction....................................................................37

10.2 Principle of the design of an oxygen electrode....................38

10.3 Parameters determining current ........................................42

10.4 Polarization voltage ........................................................42

10.5 Temperature...................................................................43

10.6 Dependence on flow........................................................43

10.7 Oxygen partial pressure – oxygen concentration.................43

Contents

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52 206 477 E Printed in Switzerland

1

Introduction

Thank you for buying the InPro

®

6800G/6850 iG /

6900 iG/6950 iG sensor from METTLER TOLEDO.

The construction of the InPro series employs leading

edge tech nology and complies with safety regula-

tions currently in force. Notwithstanding this, improp-

er use could lead to hazards for the user

or a third-party, and/or adverse effects on the plant

or other equipment.

Therefore, the operating instructions must

be read and understood by the persons involv ed

before work is started with the sensor.

The instruction manual must always be stored close

at hand, in a place accessible to all people working

with the InPro sensor.

If you have questions, which are not or insufficiently

answered in this instruction manual, please contact

your METTLER TOLEDO supplier. He will be glad to

assist you.

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2

Important notes

2

.1 Notes on operating instructions

These operating instructions contain all the information

needed for safe and proper use of the InPro 6800G /

6850iG/6900 iG/6950 iGsensor.

The operating instructions are intended for personnel

entrusted with the operation and maintenance of the

sensors. It is assumed that these persons are familiar

with the equipment in which the sensor is installed.

Warning notices and symbols

This instruction manual identifies safety instructions

and additional information by means of the following

symbols:

This symbol draws attention to safety instructions

and warnings of potential danger which, if neglect-

ed, could result in injury to persons and/or damage

to property.

This symbol identifies additional information and

instructions which, if neglected, could lead to

defects, inefficient operation and possible loss of

production.

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2.2 Intended use

METTLER TOLEDO InPro 6800G/6850iG/6900iG/

6950 i G sensors are intended solely for inline

measurement of the oxygen partial pressure in

liquids and gases, as described in this instruction

manual.

Any use of these sensors which differs from or ex-

ceeds the scope of use described in this instruction

manual will be regarded as inappropriate and incom-

patible with the intended purpose.

The manufacturer/supplier accepts no responsibility

whatsoever for any damage resulting from such

improper use. The risk is borne entirely by the user/

operator.

Other prerequisites for appropriate use include:

– compliance with the instructions, notes and

requirements set out in this instruction manual.

– acceptance of responsibility for regular inspection,

maintenance and functional testing of all asso ci -

ated components, also including compliance with

local operational and plant safety regulations.

– compliance with all information and warnings

given in the documentation relating to the products

used in conjunction with the sensor (housings,

transmitters, etc.).

– observance of all safety regulations governing the

equipment in which the sensor is installed.

– correct equipment operation in conformance with

the prescribed environmental and operational con-

ditions, and admissible installation positions.

– consultation with Mettler-Toledo Process Analytics

in the event of any uncertainties.

2.3 Safety instructions

– The plant operator must be fully aware of the

potential risks and hazards attached to operation

of the particular process or plant. The operator is

responsible for correct training of the workforce, for

signs and markings indicating sources of possible

danger, and for the selection of appropriate, state-

of-the-art instrumentation.

– It is essential that personnel involved in the

commissioning, operation or maintenance of

these sensors or of any of the associated equip-

ment (e.g. housings, transmitters, etc.) be proper-

ly trained in the process itself, as well as in the

use and handling of the associated equipment.

This includes having read and understood this

instruction manual.

– The safety of personnel as well as of the plant

itself is ultimately the responsibility of the plant

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operator. This applies in particular in the case of

plants operating in hazardous zones.

– The oxygen sensors and associated components

have no effect on the process itself and cannot

influence it in the sense of any form of control

system.

– Maintenance and service intervals and schedules

depend on the application conditions, composi-

tion of the sample media, plant equipment and

signi ficance of the safety control features of the

measuring system. Processes vary considerably,

so that schedules, where such are specified, can

only be regarded as tentative and must in any

case be individually established and verified by

the plant operator.

– Where specific safeguards such as locks, labels,

or redundant measuring systems are necessary,

these must be provided by the plant operator.

– A defective sensor must neither be installed nor

put into service.

– Only maintenance work described in this operat-

ing instruction may be performed on the sensors.

– When changing faulty components, use only

original spare parts obtainable from your

METTLER TOLEDO supplier (see spare parts list,

“Section 9.4”).

– No modifications to the sensors and the acces-

sories are allowed. The manufacturer accepts no

responsibility for damages caused by unautho-

rised modifications. The risk is borne entirely by

the user.

– When using cables for sensor connection not

supplied and recommended by the manufacturer

the following standards need to be considered:

• US National Electrical Code

®

(ANSI/NFPA 70

[NEC

®

]), where applicable.

• Canadian Electrical (CE) Code

®

(CEC Part 1,

CAN/CSA-C22.1), where applicable.

– For guidance on US installations, see ANSI/ISA-

RP12.06.01, Installation of Intrinsically Safe

Systems for Hazardous (Classified) Locations.

– Control room equipment connected to intrinsically

safe associated apparatus in the US should not

use or generate more than the specified Um of the

associated apparatus.

– Care must be taken during installation to avoid

impacts or friction that could create an ignition

source.

– Tampering and replacement with non-factory

components may adversely affect the safe use of

the system.

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– Insertion or withdrawal of removable electrical

connectors or modules is to be accomplished only

when the area is known to be free of flammable

vapors.

– WARNING –

INTRINSICALLY SAFE APPARATUS CAN BE A

SOURCE OF IGNITION IF INTERNAL SPACINGS

ARE SHORTED OR CONNECTIONS OPENED.

– WARNING –

DO NOT OPEN WHEN AN EXPLOSIVE ATMOS-

PHERE IS PRESENT.

– WARNING –

SUBSTITUTION OF COMPONENTS MAY IMPAIR

INTRINSIC SAFETY.

– WARNING –

SUBSTITUTION OF COMPONENTS MAY IMPAIR

SUITABILITY OF THE EQUIPMENT.

– WARNING –

FOR CONNECTION ONLY TO NON-FLAMMABLE

PROCESSES.

– WARNING –

TO MAINTAIN THE ENCLOSURE IP66 RATING,

THE CONNECTOR MUST BE FULLY ENGAGED.

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2.4 Correct disposal of the sensor

When the sensor is finally removed from service, ob-

serve all local environmental regulations for proper

disposal.

2.5 Examples of some typical applications

Below is a list of examples of typical fields of

application for the oxygen sensors. This list is

not exhaustive.

Measurement in gases:

– CO

2

recovery

– CO

2

purity

– Product storage

– Inert production

– Offgas monitoring

2.6 Use in Ex-zones

Attention!

For an installation in Ex-zones please read the

guidelines following hereafter:

1258

Ex-classification ATEX:

Ex ia IIC T6/T5/T4/T3 Ga/Gb

Ex ia IIIC T69°C/T81°C/T109°C/T161°C Da/Db

Number of the test certificate:

SEV 14 ATEX 0169 X

IECEx SEV 14.0026X

Ex-classification FM approved:

IS/ I, II, III /1/ABCDEFG / T6 Ta = 60 °C

- 53 800 002; Entity

Project ID: 3021227

FM certificate number: FM16US0034X

FM18CA0021X

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2.7 Ex-classification ATEX

2.7.1 Introduction

According to Directive 2014/34/EU (ATEX 95)

Appendix l, lnPro 6XXX*/*/*/*/* oxygen sensors are

devices group ll, category 1/2G and according to

RL 99/92/EG (ATEX 137) may be used in zones

0/1 or 1/2 or 1 or 2 and gas groups llA, llB and llC

that are potentially explosive due to combustible

substances in above stated temperature classes.

For use/installation, the requirements of

EN 60079-14 must be observed.

According to Directive 2014/34/EU (ATEX 95)

Appendix l, lnPro6XXX*/*/*/*/* oxygen sensors are

devices group ll, category 1/2D and according to

RL 99/92/EG (ATEX 137) may also be used in zones

20/21 or 21 or 22 that contain combustible dusts.

The digital sensor circuit is part of a common intrinsi-

cally safe system and is for operation connected to a

separately certified transmitter.

The digital sensor circuit as part of an intrinsically

safe system is isolated from the not-intrinsically safe

electric circuits up to a maximum rated voltage of

375 V and from grounded parts up to a maximum

rated voltage of 30 V.

2.7.2 Rated data

Measuring circuit

Fail-safe ignition protection class Ex ia IIC only for

connection to a certified fail-safe circuit.

Analog O

2

oxygen sensor maximum values

U

i

≤ 16 V

I

i

≤ 190 mA

P

i

≤ 200 mW

L

i

= 0 (effective internal inductance)

C

i

= 900 pF (effective internal capacitance)

Digital O

2

oxygen sensor maximum values

Two-wire current circuit:

U

i

≤ 16 V

I

i

≤ 30 mA

P

i

≤ 50 mW

L

i

= negligible

C

i

= negligible

Note: The above maximum values are each the total

of all individual circuits of the associated intrinsically

safe power supply and transmitter.

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2

.7.3 Special conditions

– The relationship between the maximum permissi-

ble ambient or media temperature and tempera-

ture class, for category 1G applications, zone 0, is

shown in the following table:

Temperature class Max. ambient or

media temperature

T 6 68 °C

T 5 80 °C

T 4 108 °C

T 3 160 °C

– The relationship between the maximum permissi-

ble ambient or media temperature and tempera-

ture class, for category 1D applications, zone 20,

is shown in the following table:

Temperature class Max. ambient or

media temperature

T 69 °C 68 °C

T 81 °C 80 °C

T 109 °C 108 °C

T 161 °C 160 °C

– The capacitance and inductance of the connecting

cable has to be considered.

– The O

2

Oxygen sensor type InPro 6XXX can be

used in / with the fittings InFit

®

76*-*** or

InTrac

®

7**-***, or in / with other suitable fittings

in potentially explosive areas.

– The metal body of the O

2

Oxygen sensors, or the

fittings InFit 76*-*** or InTrac 7**-***, or other

appropriate fitting is optionally included in the

routine pressure test of the system.

– The independent fitting used for installation of O

2

Oxygen sensor must be conductively connected to

the equipotential bonding system.

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2.8 Ex-classification – FM approved

2

.8.1 Introduction

T

he following FM control drawing and the standards

l

isted in section 2.8.4 must be observed, where

applicable:

aapappapprapproapprovapproveapprovedapprovedaapappapprapproapprovapproveapprovedapproved

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2.8.2 Rated data

For rated data please observe section 2.7.2

2.8.3 Special conditions

In type of protection intrinsically safe apparatus, the

analytical probes (InPro 6000 Series with InFit 76X/Y

and InTrac 7XX/YY Series housings) equipment is

designated with the following specific conditions of

use.

1. The oxygen sensor shall be installed in compli-

ance with the enclosure, mounting, spacing and

segregation requirements of the ultimate applica-

tion, including a tool removable cover, and is suit-

able for use with FM Approved InFit 76X/Y and In-

Trac 7XX/YY Series Housings.

2. Process temperature no greater than +130 ºC.

3. Maximum permissible working pressure is

12 barg (174 psig).

4. Potential Electrostatic Charging Hazard –

To prevent the risk of electrostatic sparking, the

non-metallic surface should only be cleaned with

a damp cloth.

5. Enclosures containing titanium constitute a poten-

tial risk of ignition by impact or friction. Care must

be taken into account during installation and use

to prevent impact or friction.

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2.8.4 Applied standards:

United States Standards

Canadian Standards

Title Number Issue

Date

Approval Standard for

Electrical Equipment for Use

i

n Hazardous (Classified)

Locations – General Require-

ments.

FM Class 3600 2011

Approval Standard for

Intrinsically Safe Apparatus

and Associated Apparatus for

Use in Class I, II & III,

Division 1, Hazardous

(Classified) Locations.

FM Class 3610 2015

A

pproval Standard for

Electrical Equipment for

Measurement, Control and

Laboratory Use.

FM Class 3810 2005

Explosive Atmospheres –

Part 0: Equipment –

General Requirements.

ANSI/ISA-60079-0

(12.00.01)

2005

Explosive Atmospheres –

Part 11: Equipment

Protection by Intrinsic

Safety ”i”.

ANSI/ISA-60079-11

(12.02.01)

2009

Safety Requirements for

Electrical Equipment for

Measurement, Control,

and Laboratory Use –

Part 1: General Requirements.

ANSI/ISA-61010-1

(82.02.01)

2004

Title Number Issue

Date

Explosive Atmospheres –

Part 0: Equipment –

General Requirements.

CAN/CSA-C22.2

No. 60079-0

2005

Explosive Atmospheres –

Part 11: Equipment

Protection by Intrinsic

Safety ”i”.

CAN/CSA-C22.2

No. 60079-11

2009

Safety Requirements for

Electrical Equipment for

Measurement, Control,

and Laboratory Use –

Part 1: General Requirements.

CAN/CSA-C22.2

No. 61010-1

2004

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3

Product description

3

.1 General information

The oxygen sensor series InPro 6800G/6850iG/

6900iG/6950iG with integrated temperature probe

are used for meas ure ment of oxygen at low and

medium concentrations.

InPro 6xxxiG sensors with ISM

®

functionality offer

Plug and Measure as well as enhanced diagnostics

features.

3.2 Principle

Amperometric oxygen sensors:

The amperometric oxygen sensors of METTLER

TOLEDO base all on the same mearuring principle

according to Clark. However different series are of-

fered, which clearly differ in the number and arrange-

ment of their electrodes and thus in their specifica-

tions:

• The measurement system of the InPro sensors

consists of a working electrode (cathode), a

counter electrode (anode), a reference electrode

and a guard ring electrode. The measurement

system is separated from the process medium by

an oxygen permeable membrane.

• The measuring technique in principle is alike with

all sensors.

• The transmitter supplies a constant voltage be-

tween cathode and anode.

• The electrolyte creates a conductive connection

between the electrodes.

• The oxygen molecules migrate from the measure-

ment medium through the membrane to the

cathode to which the voltage is supplied and are

reduced. At the same time, oxidation takes place

at the anode.

• This causes a current to flow between the anode

and cathode which is directly proportional to the

partial pressure of oxygen (pO

2

) in the process

medium. With digital ISM sensors, the sensor it-

self converts the current into oxygen concentration

and communicates the value to the transmitter.

• The guard ring electrode of the InPro 6900iG and

6950i G built into the sensor reduces the oxygen

that migrates to the side of the cathode and can

affect the measurement. The guard ring electrode

therefore enables traces of oxygen to be precisely

determined at even the lowest concentrations.

Note: Please refer to “Section 10–Theory of the po-

larographic sensor” for further information.

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ISM Sensors:

All oxygen sensors with the index “i” (6850iG,

6900i G, 6950iG) are equipped with ISM, Intelligent

Sensor Management.

Principle: In the sensor head a chip is integrated,

which takes over the entire monitoring and control of

the sensor and, beyond that, stores all sensor data.

This chip is responsed via the transmitter.

The following data are available permanently in the

sensor:

– type of sensor

– serial no.

– software version

– hardware version

– order no.

– operating time

– calibration time and calibration date

– calibration table

To check the system, the following indicators are

monitored:

– temperature

– slope

– zero current

– air current

– polarization voltage

– cathode current and voltage

Based on these informations, the transmitter calcu-

lates a wear monitor and displays it depending upon

transmitter type differently. (see the respective in-

struction manuals)

ISM enables the connection of the digital sensor to

the iSense™ Asset Suite. The user-friendly software

allows to manage all sensor information and store it

in a data base. Furthermore, the sensor can be cali-

brated via the iSense software.

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3.3 Enhanced diagnostics

(

only for ISM types available)

DLI Dynamic Lifetime Indicator The dynamic lifetime

indication allows an estimation, when the sensor in-

ner body is at the end of his lifetime, based on the

actual stress it is exposed to. The sensor permanent-

ly takes the averaged stress of the past days into

consideration and is able to increase/decrease the

lifetime accordingly.

T

he following parameters affect the lifetime indicator:

Dynamic parameters:

– Temperature

– Oxygen value

Static parameters:

– Calibration history

– Zero and Slope

The sensor keeps the information stored in the built-

in electronics and can be retrieved via a transmitter

or the iSense asset management suite.

The alarm will be resetted if the Lifetime Indicator is

not 0 days anymore (e.g. after connecting a new

sensor or changes on the measurement conditions)

For amperometric oxygen sensors, the lifetime indi-

cator is related to the inner-body of the sensor. After

exchanging the inner-body, reset the lifetime indicator

in the ISM setup menu (Menu Configure).

TTM Time to Maintenance:

This timer defines when the next electrolyte or mem-

brane replacement should be done to maintain the

best possible measurement performance. The timer

depends on the DLI parameters.

The sensors InPro 6850iG / 6950iG are equipped

additionally with an electrolyte level monitor, ELM.

The electrolyte level monitor, ELM, automatically

sets the TTM to zero as soon as a critical electrolyte

level in the sensor tip is reached.

The alarm needs to be reset in the menu ”ISM setup”.

For oxygen sensors, the time to maintenance indi-

cates a maintenance cycle for the membrane and

electrolyte.

Note: The recommended initial value for the mainte-

nance interval will be uploaded from the sensor to

the transmitter and can be adapted according to the

application experience of the user.

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ACT Adaptive Cal Timer:

This timer estimates when the next calibration should

be performed to keep the best possible measurement

performance. The timer is influenced by significant

changes on the DLI parameters.

Note: The recommended initial value for the calibra-

tion interval will be uploaded from the sensor to the

transmitter and can be adapted according to the ap-

plication experience of the user.

3.4 Scope of delivery

Each sensor is supplied fully assembled and factory-

tested for correct function together with:

– a quality control certificate

– inspection certificates 3.1

(complying with EN 10204)

Digital sensors must be filled with electrolyte before

use.

See electrolyte order details at section „Spare Parts“,

9.3.

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3.5 Equipment features

12 mm sensor

METTLER TOLEDO ISM O

2

sensors are supplied with

fitted membrane body but without electrolyte

and covered with the protection cap and have been

checked for proper function.

Anode (Pt)

Cathode and Guard Ring

Protection Cap

Cap Sleeve (N-type)

O-ring (silicone FDA/USP VI)

Membrane Body

Retainer Nut

Reference (Ag/AgCl)

Interior Body

O-ring

(9.0 3 1.0 mm, silicone FDA/USP VI)

Pg 13.5 Threaded Sleeve

AK9 Connector

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4

Installation

4

.1 Mounting the sensor

Important! Remove the protection cap before

mount ing the sensor.

Mounting the sensor in a housing

Please refer to the instruction manual of your housing

explaining on how to mount the sensor in place.

Mounting the sensor directly on a pipe or a vessel

The 12 mm sensors can be mounted directly through

a socket with inside thread Pg 13.5 and securely

tightened via the Pg 13.5 threaded sleeve.

4.2 Connection

4.2.1 Connecting the sensor to a AK9 cable

Note: The sensor is connected to the transmitter via

a AK9 cable. The AK9 cable ensures a secure con-

nection between the transmitter and the sensor under

harsh industrial conditions. The robust watertight

IP68 connector housing guarantees maximum

process safety.

Do not touch the sensor at the AK9 connector plug!

Tightly screw the plug to fasten the two parts.

Admissible mounting position

Zulässige Einbaulage

Positionement de montage admis

Inadmissible angle

Unzulässiger Winkel

Angle non admissible

5

2910094ME

15 ° 15 °

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