Metrohm 907 User Manual

907 Titrando

Manual

8.907.8003EN / 2014-08-19

Metrohm AG
CH-9100 Herisau
Switzerland
Phone [phone]
Fax [phone]
[e-mail]
www.metrohm.com

907 Titrando

8.907.8003EN / 2014-08-19

Manual

ek/jb

Teachware
Metrohm AG
CH-9100 Herisau
[e-mail]

This documentation is protected by copyright. All rights reserved.

Although all the information given in this documentation has been
checked with great care, errors cannot be entirely excluded. Should you
notice any mistakes please send us your comments using the address
given above.

Documentation in additional languages can be found on

http://documents.metrohm.com.

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Table of contents

1 Introduction 1

1.1 The Titrando system ............................................................. 1

1.2 Instrument description ......................................................... 2

1.3 Titration modes – Measuring modes – Dosing com-

1.4 About the documentation ................................................... 5

1.4.1 Symbols and conventions ........................................................ 5

1.5 Safety instructions ................................................................ 6

1.5.1 General notes on safety ........................................................... 6

1.5.2 Electrical safety ........................................................................ 6

1.5.3 Working with liquids ................................................................ 7

1.5.4 Flammable solvents and chemicals ........................................... 7

1.5.5 Recycling and disposal ............................................................. 7

Table of contents

mands .................................................................................... 3

2 Overview of the instrument 8

3 Installation 10

3.1 Setting up the instrument .................................................. 10

3.1.1 Packaging .............................................................................. 10

3.1.2 Checks .................................................................................. 10

3.1.3 Location ................................................................................ 10

3.2 Connecting a controller ..................................................... 10

3.2.1 Operation .............................................................................. 10

3.3 Connecting MSB devices .................................................... 14

3.3.1 Connecting a dosing device ................................................... 15

3.3.2 Connecting a stirrer or titration stand .................................... 16

3.3.3 Connecting a Remote Box ..................................................... 17

3.4 Connecting USB devices ..................................................... 18

3.4.1 General ................................................................................. 18

3.4.2 Connecting a USB hub ........................................................... 19

3.4.3 Connecting a printer .............................................................. 19

3.4.4 Connecting a balance ............................................................ 20

3.4.5 Connecting a PC keyboard (only for operation with Touch

Control) ................................................................................. 21

3.4.6 Connecting a barcode reader ................................................. 22

907 Titrando

3.5 Setting up the titration vessel ........................................... 23

3.5.1 General ................................................................................. 23

3.5.2 Titration vessel for volumetric KF titration .............................. 24

3.6 Connecting sensors ............................................................ 28

3.6.1 Connecting a pH, metal or ion-selective electrode .................. 28

3.6.2 Connecting a reference electrode .......................................... 29

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III

Table of contents

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3.6.3 Connecting a polarizable electrode ........................................ 29

3.6.4 Connecting a temperature sensor or an electrode with inte-

grated temperature sensor .................................................... 30

3.6.5 Connecting an iConnect ........................................................ 30

3.6.6 Differential potentiometry ...................................................... 31

4 Karl Fischer titration 33

4.1 Volumetric titration ............................................................ 33

4.1.1 Principle of the volumetric Karl Fischer titration ...................... 33

4.1.2 Endpoint determination ......................................................... 33

4.1.3 Karl Fischer reagents .............................................................. 34

4.1.4 Application of the Karl Fischer titration .................................. 34

4.1.5 Working with water standards ............................................... 34

4.1.6 Sample addition .................................................................... 36

4.1.7 Optimum working conditions ................................................ 38

5 Operation and maintenance 40

5.1 General notes ...................................................................... 40

5.1.1 Care ...................................................................................... 40

5.1.2 Maintenance by Metrohm Service .......................................... 40

5.2 Quality management and qualification with Metrohm .. 41

6 Troubleshooting 42

6.1 General ................................................................................ 42

6.2 Karl Fischer titration .......................................................... 42

6.2.1 ............................................................................................. 42

6.3 SET titration ........................................................................ 44

6.3.1 ............................................................................................. 44

7 Appendix 45

7.1 Remote interface ................................................................ 45

7.1.1 Pin assignment of the remote interface .................................. 45

8 Technical specifications 49

8.1 Measuring interface ........................................................... 49

8.1.1 Potentiometry ........................................................................ 49

8.1.2 Temperature .......................................................................... 49

8.1.3 Polarizer ................................................................................ 50

8.2 Power connection ............................................................... 51

8.3 Safety specifications ........................................................... 51

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IV

8.4 Electromagnetic compatibility (EMC) ................................ 51

8.5 Ambient temperature ......................................................... 52

8.6 Reference conditions .......................................................... 52

8.7 Dimensions .......................................................................... 52

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9 Warranty (guarantee) 54

10 Accessories 56

Index 58

Table of contents

8.8 Interfaces ............................................................................. 52

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Table of figures

Table of figures

Figure 1 The Titrando system .......................................................................... 1

Figure 2 Front 907 Titrando ............................................................................ 8

Figure 3 Rear 907 Titrando ............................................................................. 9

Figure 4 Connecting the Touch Control ......................................................... 11

Figure 5 Connecting the computer ................................................................ 13

Figure 6 MSB connections ............................................................................ 14

Figure 7 Connecting a dosing device ............................................................. 16

Figure 8 Connecting an MSB stirrer ............................................................... 17

Figure 9 Connecting the propeller stirrer to the titration stand ...................... 17

Figure 10 Connecting the Remote Box ............................................................ 18

Figure 11 Connecting a printer ....................................................................... 20

Figure 12 Schematic configuration of magnetic stirrer, electrode and buret tip

during a titration. a) stirring direction clockwise, b) stirring direction

counterclockwise. ........................................................................... 23

Figure 13 Connecting a pH, metal or ion-selective electrode ........................... 28

Figure 14 Connecting a reference electrode .................................................... 29

Figure 15 Connecting a polarizable electrode .................................................. 29

Figure 16 Connecting a temperature sensor or an electrode with integrated tem-

perature sensor ............................................................................... 30

Figure 17 Connecting the iConnect ................................................................. 31

Figure 18 Connecting an electrode to the iConnect ........................................ 31

Figure 19 Connectors of the Remote Box ........................................................ 45

Figure 20 Pin assignment of remote socket and remote plug .......................... 45

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MSB

USB

Controller

Input 1 / 2

Sensors

PC keyboard

Barcode

reader

USB hub

USB/RS-232 Converter

Balance

Touch Control

USB Sample Processor

Robotic Titrosampler

Printer

Relay Box

Remote Box

Dosing Interface

Stirrer / Ti Stand Dosino Dosimat

On

Status

8

05

D

o

s

i

m

a

M

e

t

r
o

h

On

Titrando

Computer

1 Introduction

1.1 The Titrando system

The Titrando is the heart of the modular Titrando system. Operation is car­ried out either by Touch Control with a touch-sensitive screen ("stand­alone titrator") or by a computer with a corresponding software.

A Titrando system can contain numerous kinds of a variety of instruments.
The following figure provides an overview of the peripheral devices you
can connect to the 907 Titrando.

1 Introduction

907 Titrando

Figure 1

The Titrando system

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1.2 Instrument description

Up to three control instruments (Titrando, Dosing Interface, USB Sample
Processor, etc.) can be controlled via USB connection during operation
with the 900 Touch Control.

You can request information on special applications in the "Application
Bulletins" and "Application Notes", available free of charge through the
responsible Metrohm representative. Various monographs on the subjects
of titration techniques and electrodes are also available.

Updating the device software is described in the Help for the correspond­ing PC software.

1.2 Instrument description

The 907 Titrando has the following characteristics:

￭ Operation

Operation is carried out by means of a touch-sensitive Touch Control

or with high-performance PC software.

￭ MSB connectors

Four MSB connectors (Metrohm Serial Bus) for connecting dosing devi-

ces (Dosimat with exchange unit or Dosino with dosing unit), stirrers,

titration stands and Remote Boxes.

￭ USB connectors

Two USB connectors, through which devices such as printers, PC key-

boards, barcode readers or additional control instruments (USB Sample

Processor, Titrando, Dosing Interface, etc.) can be connected.

￭ Measuring interface

Depending on the model version, one or two measuring interface(s).

Each measuring interface has one measuring input each for:

– a potentiometric electrode (pH, metal or ion-selective electrode)
– a separate reference electrode
– a temperature sensor (Pt1000 or NTC)
– a polarizable electrode
– an iConnect (measuring interface for electrodes with integrated

data chip, so-called iTrodes)

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1 Introduction

1.3 Titration modes – Measuring modes – Dosing com­mands

The 907 Titrando supports the following titration modes, measuring
modes and dosing commands:

￭ DET

Dynamic equivalence point titration. The reagent addition is carried out
in variable volume steps.
Measuring modes:

– pH (pH measurement)
– U (potentiometric voltage measurement)
– Ipol (voltametric measurement with selectable polarization cur-

rent)

– Upol (amperometric measurement with selectable polarization

voltage)

￭ MET

Monotonic equivalence point titration. The reagent addition is carried
out in constant volume steps.
Measuring modes:

– pH (pH measurement)
– U (potentiometric voltage measurement)
– Ipol (voltametric measurement with selectable polarization cur-

rent)

– Upol (amperometric measurement with selectable polarization

voltage)

￭ SET

Endpoint titration at one or two specified endpoints.
Measuring modes:

– pH (pH measurement)
– U (potentiometric voltage measurement)
– Ipol (voltametric measurement with selectable polarization cur-

rent)

– Upol (amperometric measurement with selectable polarization

voltage)

￭ STAT

Endpoint titration during which the measured value is kept constant.
Measuring modes:

– pH (pH measurement)
– U (potentiometric voltage measurement)

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1.3 Titration modes – Measuring modes – Dosing commands

￭ KFT

Volumetric water content determination according to Karl Fischer.
Measuring modes:

– Ipol (voltametric measurement with selectable polarization cur-

rent)

– Upol (amperometric measurement with selectable polarization

voltage)

￭ MEAS

The following measuring modes can be selected for measurements:

– pH (pH measurement)
– U (potentiometric voltage measurement)
– Ipol (voltametric measurement with selectable polarization cur-

rent)

– Upol (amperometric measurement with selectable polarization

voltage)

– Conc (concentration measurement with or without standard

addition)

– T (temperature measurement)

￭ STDADD

The measuring modes for standard addition are listed separately only in
tiamo™. In Touch Control they are integrated in the measuring mode
MEAS Conc.
The following measuring modes can be selected for measurements:

– auto (automatic addition of the standard addition solution by

specifying a potential difference)

– dos (automatic addition of the standard addition solution by

specifying the individual volume increments)

– man (manual addition of the standard addition solution)

￭ CAL

Electrode calibration.
Measuring mode:

– pH (calibration of pH electrodes)
– Conc (calibration of ion-selective electrodes)

￭ ELT

Electrode test for pH electrodes.
This mode is listed separately only in tiamo™. In Touch Control, the
electrode test is a component part of the CAL calibration mode.

￭ Dosing commands

The following commands for dosing can be selected:

– PREP (rinsing the cylinder and tubings of an exchange unit or

dosing unit)
– EMPTY (emptying the cylinder and tubings of a dosing unit)
– ADD (dosing a specified volume)
– LQH (carrying out complex dosing tasks with a Dosino)

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907 Titrando

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1.4 About the documentation

CAUTION

Please read through this documentation carefully before putting the
instrument into operation. The documentation contains information
and warnings which the user must follow in order to ensure safe opera­tion of the instrument.

1.4.1 Symbols and conventions

The following symbols and formatting may appear in this documentation:

Cross-reference to figure legend

The first number refers to the figure number, the sec­ond to the instrument part in the figure.

1 Introduction

Instruction step

Carry out these steps in the sequence shown.

Method Dialog text, parameter in the software

File ▶ New Menu or menu item

[Next] Button or key

WARNING

This symbol draws attention to a possible life-threat­ening hazard or risk of injury.

WARNING

This symbol draws attention to a possible hazard due
to electrical current.

WARNING

This symbol draws attention to a possible hazard due
to heat or hot instrument parts.

WARNING

This symbol draws attention to a possible biological
hazard.

907 Titrando

CAUTION

This symbol draws attention to possible damage to
instruments or instrument parts.

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1.5 Safety instructions

1.5 Safety instructions

1.5.1 General notes on safety

WARNING

This instrument may only be operated in accordance with the specifica­tions in this documentation.

This instrument has left the factory in a flawless state in terms of technical
safety. To maintain this state and ensure non-hazardous operation of the
instrument, the following instructions must be observed carefully.

1.5.2 Electrical safety

The electrical safety when working with the instrument is ensured as part
of the international standard IEC 61010.

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NOTE

This symbol highlights additional information and
tips.

WARNING

Only personnel qualified by Metrohm are authorized to carry out service
work on electronic components.

WARNING

Never open the housing of the instrument. The instrument could be
damaged by this. There is also a risk of serious injury if live components
are touched.

There are no parts inside the housing which can be serviced or replaced
by the user.

Mains voltage

WARNING

An incorrect mains voltage can damage the instrument.

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6

Only operate this instrument with a mains voltage specified for it (see
rear panel of the instrument).

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Protection against electrostatic charges

WARNING

Electronic components are sensitive to electrostatic charges and can be
destroyed by discharges.

Do not fail to pull the mains cable out of the mains connection socket
before you set up or disconnect electrical plug connections at the rear
of the instrument.

1.5.3 Working with liquids

CAUTION

Periodically check all system connections for leaks. Observe the relevant
regulations in respect to working with flammable and/or toxic fluids
and their disposal.

1 Introduction

1.5.4 Flammable solvents and chemicals

WARNING

All relevant safety measures are to be observed when working with
flammable solvents and chemicals.

￭ Set up the instrument in a well-ventilated location (e.g. fume cup-

board).

￭ Keep all sources of flame far from the workplace.
￭ Clean up spilled liquids and solids immediately.
￭ Follow the safety instructions of the chemical manufacturer.

1.5.5 Recycling and disposal

This product is covered by European Directive 2002/96/EC, WEEE – Waste
from Electrical and Electronic Equipment.

The correct disposal of your old equipment will help to prevent negative
effects on the environment and public health.

More details about the disposal of your old equipment can be obtained
from your local authorities, from waste disposal companies or from your
local dealer.

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2 Overview of the instrument

On

2

1

907 Titrando

iTrode ready

Metrohm

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1

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8

Figure 2 Front 907 Titrando

Bottle holder

With holding clamps, for two reagent bot­tles.

"On" LED

2

Lights up when the Titrando is ready for
operation.

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1

2
3

4

5

6

7

8

9

10

11

2 Overview of the instrument

Figure 3 Rear 907 Titrando

Type plate

1

Contains specifications concerning supply
voltage, instrument type and serial number.

Connector (Controller)

3

For connecting a Touch Control or a PC with
installed PC software. Mini DIN, 9-pin.

Power socket

5

Electrode connector (Ind.)

7

For connecting pH, metal or ion-selective
electrodes with integrated or separated ref­erence electrode. Socket F.

Temperature sensor connector (Temp.)

9

For connecting temperature sensors (Pt1000
or NTC). Two B sockets, 2 mm.

Electrode connector (iConnect)

11

For connecting electrodes with integrated
data chip (iTrodes).

USB connector (USB 1 and USB 2)

2

USB ports (type A) for connecting printer,
keyboard, barcode reader, additional Titran­dos, USB Sample Processor, etc.

MSB connector (MSB 1 to MSB 4)

4

Metrohm Serial Bus. For connecting external
dosing devices, stirrers or Remote Boxes.
Mini DIN, 9-pin.

Measuring interface 1 (Input 1)

6

Electrode connector (Ref.)

8

For connecting reference electrodes, e.g.
Ag/AgCl reference electrode. Socket B,
4 mm.

Electrode connector (Pol.)

10

For connecting polarizable electrodes, e.g.
double Pt wire electrodes. Socket F.

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3.1 Setting up the instrument

3 Installation

3.1 Setting up the instrument

3.1.1 Packaging

The instrument is supplied in highly protective special packaging together
with the separately packed accessories. Keep this packaging, as only this
ensures safe transportation of the instrument.

3.1.2 Checks

Immediately after receipt, check whether the shipment has arrived com­plete and without damage by comparing it with the delivery note.

3.1.3 Location

The instrument has been developed for operation indoors and may not be
used in explosive environments.

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Place the instrument in a location of the laboratory which is suitable for
operation, free of vibrations, protected from corrosive atmosphere, and
contamination by chemicals.

The instrument should be protected against excessive temperature fluctu­ations and direct sunlight.

3.2 Connecting a controller

3.2.1 Operation

Two different versions are available for operating the 907 Titrando:

￭ A Touch Control with touch-sensitive screen. It forms a "stand-alone

instrument" together with the 907 Titrando.

￭ A computer enables operation of the 907 Titrando with the help of a

PC software, e.g. tiamo.

CAUTION

Take care to ensure that the power supply cable is pulled out of the
power socket before either setting up or disconnecting connections
between the instruments.

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3.2.1.1 Connecting a Touch Control

NOTE

The plug is protected against accidental disconnection of the cable by
means of a pull-out protection feature. If you wish to pull out the plug,
you will first need to pull back the outer plug sleeve marked with
arrows.

Connect the Touch Control as follows:

￭ Insert the plug of the Touch Control connection cable into the

1

Controller socket.

3 Installation

Figure 4 Connecting the Touch Control

￭ Connect the MSB devices (see Chapter 3.3, page 14).

2

￭ Connect the USB devices (see Chapter 3.4, page 18).

￭ Connect the Titrando to the power supply.

3

￭ Switch on the Touch Control.

4

The Touch Control power supply is supplied through the Titrando.
Automatic system tests are performed on both instruments at the
time of activation. The On LED on the front of the Titrando lights up
when the system test has been completed and the instrument is
ready for operation.

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3.2 Connecting a controller

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CAUTION

The Touch Control must be shut down properly by deactivation with
the power switch on the rear of the instrument before the power sup­ply is interrupted. If this is not done, then there is a danger of data loss.
Because of the fact that the power supply for the Touch Control is pro­vided through the Titrando, you must never disconnect the Titrando
from the power supply (e.g. by deactivating with a connector strip)
before you have deactivated the Touch Control.

If you would prefer not to position the Touch Control directly next to the
Titrando, then you can lengthen the connection with the 6.2151.010
cable. The maximum connection length permitted is 5 m.

3.2.1.2

Connecting a computer

The 907 Titrando requires a USB connection to a computer in order to be
able to be controlled by a PC software. Using a 6.2151.000 controller
cable, the instrument can be connected directly, either to a USB socket on
a computer, to a connected USB hub or to a different Metrohm control
device.

You need administrator rights for the installation of driver software and
control software on your computer.

Cable connection and driver installation

A driver installation is required in order to ensure that the 907 Titrando is
recognized by the PC software. To accomplish this, you must comply with
the procedures specified. The following steps are necessary:

1

Installing the software

￭ Insert the PC software installation CD and carry out the installa-

tion program directions.

￭ Exit the program if you have started it after the installation.

2

Establishing the cable connections

￭ Connect all peripheral devices to the instrument, see Chapter 3.3,

page 14 and see Chapter 3.4, page 18.

￭ Connect the instrument to the power supply if you have not

already done this.
The "On" LED on the 907 Titrando is not yet illuminated!

￭ Connect the instrument to a USB connector (Type A) of your com-

puter (see manual of your computer). The 6.2151.000 cable is
used for this purpose.

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6.2151.000

Figure 5 Connecting the computer

The instrument is recognized. Depending on the version of the Win­dows operating system used, the driver installation proceeds differ­ently afterwards. Either the necessary driver software is installed
automatically or an installation wizard is started.

Follow the instructions of the installation wizard.

3

3 Installation

The "On" LED on the 907 Titrando lights up when the driver installa­tion has been completed and the instrument is ready for operation.

If problems should occur during installation, contact your company's IT
support team.

NOTE

The plug on the instrument end of the 6.2151.000 controller cable is
protected against accidental disconnection by means of a pull-out pro­tection feature. If you wish to pull out the plug, you will first need to
pull back the outer plug sleeve marked with arrows.

Registering and configuring the instrument in the PC soft­ware

The instrument must be registered in the configuration of your PC soft­ware. Once that has been done, you can then configure it according to
your requirements. Proceed as follows:

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