KROHNE PH-8590 User Manual

OPTISENS PH 8590

OPTISENS PH 8590OPTISENS PH 8590

pH sensor

Handbook

HandbookHandbook

: IMPRINT :::::::::::::::::::::::::::::::::::::::

All rights reserved. It is prohibited to reproduce this documentation, or any part thereof, without the prior written authorisation of KROHNE Messtechnik GmbH.All rights reserved. It is prohibited to reproduce this documentation, or any part thereof, without the prior written authorisation of Sensus.All rights reserved. It is prohibited to reproduce this documentation, or any part thereof, without the prior written authorisation of Siemens.All rights reserved. It is

www.krohne.com 03/2012 - 4001931401 MA OPTISENS PH 8590 R01 en

OPTISENS PH 8590

CONTENTS

1 Safety instructions 5

1.1 Intended use ..................................................................................................................... 5

1.2 Safety instructions from the manufacturer ..................................................................... 5

1.2.1 Copyright and data protection ................................................................................................ 5

1.2.2 Disclaimer ............................................................................................................................... 6

1.2.3 Product liability and warranty ................................................................................................ 6

1.2.4 Information concerning the documentation........................................................................... 6

1.2.5 Warnings and symbols used................................................................................................... 7

1.3 Safety instructions for the operator................................................................................. 7

2 Device description 8

2.1 Scope of delivery............................................................................................................... 8

2.2 Device description ............................................................................................................ 9

2.2.1 pH electrodes.......................................................................................................................... 9

2.3 Nameplate ...................................................................................................................... 10

3 Installation 11

3.1 Notes on installation ......................................................................................................11

3.2 Storage and transport .................................................................................................... 11

3.3 Installation procedure .................................................................................................... 12

3.4 Pre-installation requirements ....................................................................................... 13

3.5 Electrical connection......................................................................................................13

3.5.1 Connecting the sensor cable to the signal converter .......................................................... 14

3.5.2 Connecting the external temperature sensor...................................................................... 15

3.5.3 Connecting the cable to the sensor...................................................................................... 16

3.6 Calibrating the electrode................................................................................................ 16

3.7 Installing the sensor....................................................................................................... 17

3.7.1 General installation instructions.......................................................................................... 17

3.8 Installing an external temperature sensor.................................................................... 18

4 Operation 19

4.1 Menu mode structure..................................................................................................... 19

4.2 Function tables ............................................................................................................... 21

4.2.1 Menu A, quick setup.............................................................................................................. 21

4.2.2 Menu B, test .......................................................................................................................... 22

4.2.3 Menu C, setup ....................................................................................................................... 23

4.3 Calibration ...................................................................................................................... 25

4.3.1 Temperature compensation .................................................................................................25

4.3.2 Calibrating pH measurement ...............................................................................................29

4.3.3 Calibration log....................................................................................................................... 34

4.4 Troubleshooting.............................................................................................................. 34

www.krohne.com03/2012 - 4001931401 MA OPTISENS PH 8590 R01 en

CONTENTS

OPTISENS PH 8590

5 Service 35

5.1 Maintenance ................................................................................................................... 35

5.1.1 Cleaning ................................................................................................................................ 35

5.1.2 Aging and re-calibration ....................................................................................................... 35

5.2 Spare parts availability...................................................................................................36

5.3 Availability of services .................................................................................................... 36

5.4 Returning the device to the manufacturer..................................................................... 37

5.4.1 General information.............................................................................................................. 37

5.4.2 Form (for copying) to accompany a returned device............................................................ 38

5.5 Disposal .......................................................................................................................... 38

6 Technical data 39

6.1 Measuring principle........................................................................................................39

6.1.1 pH measurement .................................................................................................................. 39

6.2 Technical data................................................................................................................. 41

6.3 Dimensions ..................................................................................................................... 43

7 Appendix 44

7.1 pH as a function of mV.................................................................................................... 44

7.2 pH temperature dependency.......................................................................................... 45

www.krohne.com 03/2012 - 4001931401 MA OPTISENS PH 8590 R01 en

OPTISENS PH 8590

1.1 Intended use

CAUTION!

Responsibility for the use of the measuring devices with regard to suitability, intended use and corrosion resistance of the used materials against the measured fluid lies solely with the operator.

INFORMATION!

The manufacturer is not liable for any damage resulting from improper use or use for other than the intended purpose.

The intended use of OPTISENS PH 8590 sensor is the measurement of pH value in water applications. The sensor is suitable for connection to the MAC 100 signal converter.

1.2 Safety instructions from the manufacturer

1.2.1 Copyright and data protection

The contents of this document have been created with great care. Nevertheless, we provide no guarantee that the contents are correct, complete or up-to-date.

SAFETY INSTRUCTIONS 1

The contents and works in this document are subject to copyright. Contributions from third parties are identified as such. Reproduction, processing, dissemination and any type of use beyond what is permitted under copyright requires written authorisation from the respective author and/or the manufacturer.

The manufacturer tries always to observe the copyrights of others, and to draw on works created in-house or works in the public domain.

The collection of personal data (such as names, street addresses or e-mail addresses) in the manufacturer's documents is always on a voluntary basis whenever possible. Whenever feasible, it is always possible to make use of the offerings and services without providing any personal data.

We draw your attention to the fact that data transmission over the Internet (e.g. when communicating by e-mail) may involve gaps in security. It is not possible to protect such data completely against access by third parties.

We hereby expressly prohibit the use of the contact data published as part of our duty to publish an imprint for the purpose of sending us any advertising or informational materials that we have not expressly requested.

www.krohne.com03/2012 - 4001931401 MA OPTISENS PH 8590 R01 en

1 SAFETY INSTRUCTIONS

1.2.2 Disclaimer

The manufacturer will not be liable for any damage of any kind by using its product, including, but not limited to direct, indirect or incidental and consequential damages.

This disclaimer does not apply in case the manufacturer has acted on purpose or with gross negligence. In the event any applicable law does not allow such limitations on implied warranties or the exclusion of limitation of certain damages, you may, if such law applies to you, not be subject to some or all of the above disclaimer, exclusions or limitations.

Any product purchased from the manufacturer is warranted in accordance with the relevant product documentation and our Terms and Conditions of Sale.

The manufacturer reserves the right to alter the content of its documents, including this disclaimer in any way, at any time, for any reason, without prior notification, and will not be liable in any way for possible consequences of such changes.

1.2.3 Product liability and warranty

The operator shall bear responsibility for the suitability of the device for the specific purpose. The manufacturer accepts no liability for the consequences of misuse by the operator. Improper installation and operation of the devices (systems) will cause the warranty to be void. The respective "Standard Terms and Conditions" which form the basis for the sales contract shall also apply.

OPTISENS PH 8590

1.2.4 Information concerning the documentation

To prevent any injury to the user or damage to the device it is essential that you read the information in this document and observe applicable national standards, safety requirements and accident prevention regulations.

If this document is not in your native language and if you have any problems understanding the text, we advise you to contact your local office for assistance. The manufacturer can not accept responsibility for any damage or injury caused by misunderstanding of the information in this document.

This document is provided to help you establish operating conditions, which will permit safe and efficient use of this device. Special considerations and precautions are also described in the document, which appear in the form of underneath icons.

www.krohne.com 03/2012 - 4001931401 MA OPTISENS PH 8590 R01 en

OPTISENS PH 8590

1.2.5 Warnings and symbols used

Safety warnings are indicated by the following symbols.

DANGER!

This information refers to the immediate danger when working with electricity.

DANGER!

This warning refers to the immediate danger of burns caused by heat or hot surfaces.

DANGER!

This warning refers to the immediate danger when using this device in a hazardous atmosphere.

DANGER!

These warnings must be observed without fail. Even partial disregard of this warning can lead to serious health problems and even death. There is also the risk of seriously damaging the device or parts of the operator's plant.

SAFETY INSTRUCTIONS 1

WARNING!

Disregarding this safety warning, even if only in part, poses the risk of serious health problems. There is also the risk of damaging the device or parts of the operator's plant.

CAUTION!

Disregarding these instructions can result in damage to the device or to parts of the operator's plant.

INFORMATION!

These instructions contain important information for the handling of the device.

LEGAL NOTICE!

This note contains information on statutory directives and standards.

• HANDLING

HANDLING

HANDLINGHANDLING

This symbol designates all instructions for actions to be carried out by the operator in the specified sequence.

i RESULT

RESULT

RESULTRESULT This symbol refers to all important consequences of the previous actions.

1.3 Safety instructions for the operator

WARNING!

In general, devices from the manufacturer may only be installed, commissioned, operated and maintained by properly trained and authorized personnel. This document is provided to help you establish operating conditions, which will permit safe and efficient use of this device.

www.krohne.com03/2012 - 4001931401 MA OPTISENS PH 8590 R01 en

2 DEVICE DESCRIPTION

2.1 Scope of delivery

INFORMATION!

Inspect the cartons carefully for damages or signs of rough handling. Report damage to the carrier and to the local office of the manufacturer.

INFORMATION!

Do a check of the packing list to make sure that you have all the elements given in the order.

INFORMATION!

Look at the device nameplate to ensure that the device is delivered according to your order. Check for the correct supply voltage printed on the nameplate.

OPTISENS PH 8590

Figure 2-1: Standard scope of delivery

1 Ordered sensor 2 Documentation

Optional accessories

• SENSOFIT FLOW 1000 - flow through holder (in preparation)

• SENSOFIT IMM 1000/2000 - immersion holder (in preparation)

• SENSOFIT RET 1000/2000 - retractable holder (in preparation)

• Cable pH/ORP-W US style sensor 4 pin connector to hanked 7.62 m (25ft.) / 10 m (33ft.)

Consumables/Spare parts available

• 250 ml pH buffer solutions pH4/pH7

OPTISENS PH 8590

• with 23 mm (0.91”) / 44 mm (1.75”) length and attached cable 7.62 m (25 ft.) / 10 m (33 ft.)

• with 23 mm (0.91”) / 44 mm (1.75”) length and 4-pin connector

INFORMATION!

For further Information ask your local sales representer.

www.krohne.com 03/2012 - 4001931401 MA OPTISENS PH 8590 R01 en

OPTISENS PH 8590

2.2 Device description

2.2.1 pH electrodes

DEVICE DESCRIPTION 2

Figure 2-2: Sensor type

1 attached cable or 4-pin connector 2 MNPT 3/4" 3 CPVC Body 4 MNPT 3/4" 5 Ceramic diaphragm 6 Protection cap 7 KCl Solution

The OPTISENS PH 8590 is manufactured using a pH sensitive special glass which can be used in almost all standard water applications due to its wide measuring range.

www.krohne.com03/2012 - 4001931401 MA OPTISENS PH 8590 R01 en

2 DEVICE DESCRIPTION

The pH electrodes are available with different diaphragms:

OPTISENS PH 8590

Figure 2-3: Diaphragm types

1 Reference electrode 2 KCl solution 3 Inner pH 7 buffer solution 4 Measuring electrode 5 PTFE diaphragm 6 Ceramic diaphragm 7 open diaphragm

pH electrode with open diaphragm and Pt100

pH electrode with open diaphragm and Pt100pH electrode with open diaphragm and Pt100 open diaphragm (microscopically small hole in the glass); integrated Pt100 temperature measurement; suitable for cooling water, waste water and chemical industry applications.

pH electrode with ceramic diaphragm

pH electrode with ceramic diaphragmpH electrode with ceramic diaphragm Ceramic diaphragm; suitable for drinking water and pool industry applications.

pH electrode with PTFE diaphragm

pH electrode with PTFE diaphragmpH electrode with PTFE diaphragm Dirt-repellent Teflon diaphragm; suitable for waste water, surface water and process water applications.

2.3 Nameplate

INFORMATION!

Look at the device nameplate to ensure that the device is delivered according to your order. Check for the correct supply voltage printed on the nameplate.

The sensor type is specified on the labelling of the sensor package and on the sensor itself.

www.krohne.com 03/2012 - 4001931401 MA OPTISENS PH 8590 R01 en

OPTISENS PH 8590

3.1 Notes on installation

INFORMATION!

Inspect the cartons carefully for damages or signs of rough handling. Report damage to the carrier and to the local office of the manufacturer.

INFORMATION!

Do a check of the packing list to make sure that you have all the elements given in the order.

INFORMATION!

Look at the device nameplate to ensure that the device is delivered according to your order. Check for the correct supply voltage printed on the nameplate.

3.2 Storage and transport

CAUTION!

Do not store the electrode tip dry. This will shorten lifetime considerably. Always store the pH electrode tip wet in a 3 molar KCl solution when not in use. Saltless water must be avoided since this would leak the KCl ions. The original packing in which the electrode tip was delivered contains a plastic tube with KCl solution and therefore is suitable for storage and transport (see following drawing).

INSTALLATION 3

• Since the pH electrode is made out of glass it is very fragile. Avoid shocks of any kind.

• Do not touch or scratch the pH sensitive glass tip of the electrode.

• Store the electrode in its original packaging in a dry, dust-free location. Keep it away from

dirt. If necessary, clean it as described on page 35.

www.krohne.com03/2012 - 4001931401 MA OPTISENS PH 8590 R01 en

3 INSTALLATION

Figure 3-1: pH electrode in its original packaging

1 Protection cap filled with 3 molar KCl Solution 2 pH electrode 3 attached cable or 4-pin connector

Storing the electrode in the provided plastic tube

• Take the protection cap from the packaging.

• Fill the protection cap with 3 molar KCl solution.

• Insert the electrode tip into the protection cap until it is fully covered with KCI solution.

• Store the electrode in its original packaging.

OPTISENS PH 8590

3.3 Installation procedure

Because a new pH electrode needs to be calibrated before it is installed into its final measuring location, it is important to follow the installation order:

1. Unpack the electrode.

2. Connect the electrode to the signal converter.

3. Calibrate the electrode.

4. Install the electrode into its final measuring location.

The required steps are explained in the following sections.

www.krohne.com 03/2012 - 4001931401 MA OPTISENS PH 8590 R01 en

OPTISENS PH 8590

3.4 Pre-installation requirements

CAUTION!

•

Never touch or scratch the pH sensitive glass tip of the electrode.

•

Make sure that the glass tip is clean and dust-free. If necessary, clean the tip as described on page 35

INSTALLATION 3

Figure 3-2: Handling the electrode

Unpacking the electrode

• Gently pull the protection cap from the electrode 1.

• Lay the electrode on a soft mat/tissue 2.

• Keep the protection cap in the original packaging 3.

3.5 Electrical connection

DANGER!

Observe the national regulations for electrical installations!

WARNING!

Observe without fail the local occupational health and safety regulations. Any work done on the electrical components of the measuring device may only be carried out by properly trained specialists.

www.krohne.com03/2012 - 4001931401 MA OPTISENS PH 8590 R01 en

3 INSTALLATION

3.5.1 Connecting the sensor cable to the signal converter

DANGER!

All work on the electrical connections may only be carried out with the power disconnected. Take note of the voltage data on the nameplate!

INFORMATION!

Look at the device nameplate to ensure that the device is delivered according to your order. Check for the correct supply voltage printed on the nameplate.

OPTISENS PH 8590

Figure 3-3: Sensor connection terminals on the signal converter dual channel version with terminal block A+B

1 Sensor connection terminals 2 Terminal block S (protective earth) and, to the right, terminal block A 3 Terminal block A: terminals for sensor and temperature 4 Terminal block B: terminals for sensor and temperature

When ordering the single channel version, only the interface "Pos.A" is populated. In the version with dual channel the interfaces "Pos.A" and "Pos.B" are populated.

Wire

Wire Terminal block Pos.A/B

WireWire

OPTISENS PH 8590 with 4-wire double coax cable

OPTISENS PH 8590 with 4-wire double coax cableOPTISENS PH 8590 with 4-wire double coax cable

Inner coax shield (black) N (ref.)

Coax core (transparent) O (pH)

Pt100 (white) P

Pt100 (red) X

Terminal block Pos.A/B

Terminal block Pos.A/BTerminal block Pos.A/B

www.krohne.com 03/2012 - 4001931401 MA OPTISENS PH 8590 R01 en

+ 32 hidden pages