InPro 6800G/6850i G/6900iG/6950i G O212 mm 3
© 12 /15 Mettler-Toledo GmbH InPro 6000 G – Series
Printed in Switzerland 52 206 477
InPro 6800G/6850i G/6900iG/6950i G O212 mm 3
1 Introduction.....................................................................4
2 Important notes ...............................................................5
2.1 Notes on operating instructions ..........................................5
2.2 Intended use ....................................................................5
2.3 Safety instructions.............................................................6
2.4 Examples of some typical applications................................7
2.5 Use in Ex-zones ...............................................................7
2.6 Ex-classification ATEX .......................................................8
2.6.1 Introduction......................................................................8
2.6.2 Rated data .......................................................................8
2.6.3 Special conditions.............................................................9
2.7 Ex-classification FM approved..........................................10
3 Product description........................................................11
3.1 General information ........................................................11
3.2 Principle ........................................................................11
3.3 Enhanced diagnostics (only for ISM types available) ..........13
3.4 Scope of delivery ............................................................14
3.5 Equipment features .........................................................15
4 Installation....................................................................16
4.1 Mounting the sensor........................................................16
4.2 Connection ....................................................................16
4.2.1 Connecting the sensor to a AK9 cable ...............................16
4.2.2 Connecting the cable to the transmitter ..............................17
5 Operation ......................................................................18
5.1 Start-up and polarizing....................................................18
5.2 Calibration .....................................................................19
5.2.1 Purpose of calibration .....................................................19
5.2.2 What you have to know for calibration ..............................19
5.2.3 Single point calibration....................................................20
5.2.4 Dual point calibration......................................................20
6 Maintenance .................................................................21
6.1 Inspection of the sensor...................................................21
6.1.1 Visual inspection ............................................................21
6.1.2 Using the METTLER TOLEDO O2sensor master ...................22
6.1.3 Testing the sensor via a transmitter...................................23
6.1.4 ISM design.....................................................................24
6.2 Changing the electrolyte,
the membrane body or the interior body ............................25
7 Storage.........................................................................28
8 Product specification .....................................................29
8.1 Certificates .....................................................................29
8.2 Specifications.................................................................30
9 Ordering information .....................................................32
9.1 Sensors .........................................................................32
9.2 Transmitter.....................................................................32
9.3 Accessoires....................................................................32
9.4 Spare parts ....................................................................33
9.5 Cables...........................................................................33
9.6 Recommended housings .................................................33
10 Theory of the polarographic sensor.................................34
10.1 Introduction....................................................................34
10.2 Principle of the design of an oxygen electrode....................34
10.3 Parameters determining current ........................................38
10.4 Polarization voltage ........................................................38
10.5 Temperature...................................................................39
10.6 Dependence on flow........................................................39
10.7 Oxygen partial pressure – oxygen concentration.................39
Contents