Xylem ProLab 2000 User Manual

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OPERATING MANUAL

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ProLab 2000 pH/ISE/D.O./Conductivity

MEASURING INSTRUMENT WITH AUTOMATIC SENSOR RECOGNITION AND ELECTRONIC ACCESS CONTROL

ProLab 2000

CE conformity

Radio data transmission

SI Analytics GmbH hereby declares that the ProLab 2000 meter is in compliance with the basic requirements and the other relevant regulations of the directive 1999/5/EC. The EC declaration of conformity can be requested from SI Analytics GmbH.

Reprinting - even as excerpts - is only allowed with the explicit written authorization of SI Analytics GmbH, Mainz. Printed in Germany.

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ProLab 2000

KONFORMITÄTSERKLÄRUNG DECLARATION OF CONFORMITY DÉCLARATION DE CONFORMITÉ

Wir erklären in alleiniger

Verantwortung, dass das

Produkt

pH-/ISE-/

Leitfähigkeits-/

Sauerstoff-

Messgerät

ProLab 2000

auf das sich diese Erklärung

bezieht, übereinstimmt mit

den Angaben im Kapitel

We declare under our sole

responsibility that the

product

pH / ISE /

conductivity / DO

measuring instrument

ProLab 2000

to which this declaration

relates is in conformity with

the specifications in the

chapter

Nous déclarons sous notre seule responsabilité que le

produit

Appareil de mesure

pour pH/ISE/

conductivité/

oxygène

ProLab 2000

auquel se réfère cette

déclaration est conforme aux

indications du chapitre

3. März, March 3, 3 mars 2010 AGQSF 0000-A106-02/100303

SI Analytics GmbH

Hattenbergstr. 10

D-55122 Mainz

Deutschland, Germany, Allemagne

Technische Daten

pH-/ISE-/Leitfähigkeits-/Sauerstoff-Messgerät

ProLab 2000

3. März 2010

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ProLab 2000

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ProLab 2000 Contents

1 Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

1.1 General features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

1.2 Keypad . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

1.3 Display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

1.4 Socket field . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

1.5 Automatic sensor recognition . . . . . . . . . . . . . . . . . . . . . 13

1.6 Electronic access control . . . . . . . . . . . . . . . . . . . . . . . . 15

2 Safety . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

2.1 Authorized use . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

2.2 General safety instructions . . . . . . . . . . . . . . . . . . . . . . . 18

3 Commissioning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

3.1 Scope of delivery . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

3.2 Power supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

3.3 Initial commissioning . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

4 Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

4.1 Switch the meter on and off . . . . . . . . . . . . . . . . . . . . . . 21

4.2 General operating principles . . . . . . . . . . . . . . . . . . . . . 22

4.2.1 Operating modes . . . . . . . . . . . . . . . . . . . . . . . . 22

4.2.2 Navigation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

4.2.3 Navigation example 1: Setting the language . . . 25

4.2.4 Navigation example 2: Setting the date and time 27

4.3 Access control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

4.3.1 Administrating access authorizations . . . . . . . . 29

4.3.2 Lost your electronic key? . . . . . . . . . . . . . . . . . 31

4.3.3 Lock . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

4.4 System settings (system menu) . . . . . . . . . . . . . . . . . . . 32

4.4.1 Data storage . . . . . . . . . . . . . . . . . . . . . . . . . . . 32

4.4.2 Display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32

4.4.3 System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34

4.4.4 Automatic Stability control . . . . . . . . . . . . . . . . . 35

4.5 pH value / ORP voltage . . . . . . . . . . . . . . . . . . . . . . . . . 36

4.5.1 General information . . . . . . . . . . . . . . . . . . . . . . 36

4.5.2 Measuring the pH value . . . . . . . . . . . . . . . . . . 37

4.5.3 Measuring the ORP . . . . . . . . . . . . . . . . . . . . . . 39

4.5.4 Settings for pH and ORP measurements . . . . . 41

4.5.5 pH calibration . . . . . . . . . . . . . . . . . . . . . . . . . . 43

4.5.6 Calibration interval . . . . . . . . . . . . . . . . . . . . . . 48

4.5.7 Calibrating . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49

4.6 Ion concentration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53

4.6.1 General information . . . . . . . . . . . . . . . . . . . . . . 53

4.6.2 Measuring the ion concentration . . . . . . . . . . . 54

4.6.3 Settings for ISE measurements . . . . . . . . . . . . 55

4.6.4 Calibrating for ISE measurements . . . . . . . . . . 56

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Contents ProLab 2000

4.7 Conductivity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62

4.7.1 General information . . . . . . . . . . . . . . . . . . . . . . 62

4.7.2 Measuring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63

4.7.3 Temperature compensation . . . . . . . . . . . . . . . . 65

4.7.4 Settings for conductivity measuring cells . . . . . . 66

4.7.5 Determining the cell constant

(calibration in control standard) . . . . . . . . . . . . . 68

4.8 Dissolved oxygen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71

4.8.1 General information . . . . . . . . . . . . . . . . . . . . . . 71

4.8.2 Measuring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72

4.8.3 Settings for D.O. sensors . . . . . . . . . . . . . . . . . . 74

4.8.4 D.O. calibration . . . . . . . . . . . . . . . . . . . . . . . . . 75

4.9 Storage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 80

4.9.1 Manual storage . . . . . . . . . . . . . . . . . . . . . . . . . 81

4.9.2 Automatic storage at intervals . . . . . . . . . . . . . . 82

4.9.3 Reading the measurement data storage . . . . . . 84

4.9.4 Erasing the data storage . . . . . . . . . . . . . . . . . . 87

4.9.5 Displaying and downloading calibration records 87

4.9.6 Displaying and downloading calibration history . 89

4.10 Transmitting data (to a PC or printer) . . . . . . . . . . . . . . . 90

4.10.1 RS232 interface . . . . . . . . . . . . . . . . . . . . . . . . . 90

4.10.2 USB interface (device) . . . . . . . . . . . . . . . . . . . . 91

4.10.3 Options for data transmission . . . . . . . . . . . . . . 92

4.10.4 Operation with MultiLab pilot . . . . . . . . . . . . . . . 93

4.11 Reset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 93

4.11.1 Resetting the sensor settings . . . . . . . . . . . . . . 93

4.11.2 Resetting the system settings . . . . . . . . . . . . . . 95

5 Maintenance, cleaning, disposal . . . . . . . . . . . . . . . . . 97

5.1 Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 97

5.2 Cleaning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 98

5.3 Disposal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 98

6 What to do if... . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .99

6.1 pH and ORP measurement . . . . . . . . . . . . . . . . . . . . . . 99

6.2 ISE measurement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 101

6.3 Conductivity measurement . . . . . . . . . . . . . . . . . . . . . . 102

6.4 D.O. measurement . . . . . . . . . . . . . . . . . . . . . . . . . . . . 102

6.5 General errors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 104

7 Technical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 105

7.1 General data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 105

7.2 Measuring ranges, resolution, accuracy . . . . . . . . . . . . 106

7.2.1 pH/ORP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 106

7.2.2 ISE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 107

7.2.3 Conductivity . . . . . . . . . . . . . . . . . . . . . . . . . . . 108

7.2.4 Dissolved oxygen . . . . . . . . . . . . . . . . . . . . . . . 109

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ProLab 2000 Contents

8 Lists . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 111

Index . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 117

Appendix . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .119

A.1 Firmware update . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 119

A.2 Menus . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 121

A.2.1 Data storage . . . . . . . . . . . . . . . . . . . . . . . . . . 121

A.2.2 Display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 122

A.2.3 System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 122

A.2.4 <STO A.2.5 <PRT

A.2.6 pH/U . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 124

A.2.7 ISE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 125

A.2.8 Conductivity . . . . . . . . . . . . . . . . . . . . . . . . . . . 125

A.2.9 Oxygen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 126

_> . . . . . . . . . . . . . . . . . . . . . . . . . . . . 123

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Contents ProLab 2000

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ProLab 2000 Overview

ENU

1Overview

1.1 General features

The ProLab 2000 precision meter enables you to perform pH, ORP, conductivity, dissolved oxygen (D.O.) and ion-selective measurements rapidly and reliably. The ProLab 2000 provides the maximum degree of ease of use, reliability and, above all, measuring certainty for all applications.

The proven calibration procedures, and stability control function (SC) and the sensor recognition function support your work with the meter.

In addition, the ProLab 2000 provides an electronic access control. Documented measurement data is thus automatically assigned to a user.

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1 Keypad

2 Display

3 Reader field for electronic access control

4 Socket field

Overview ProLab 2000

SCMODE

STO

ESC

CAL

RCL

MODE

CAL

STO

RCL

1.2 Keypad

In this operating manual, keys are indicated by brackets <..> . The key symbol (e.g. <MENU/OK>) generally indicates a short keystroke (under 2 sec) in this operating manual. A long keystroke (approx. 2 sec) is indicated by the underscore behind the key symbol (e.g. <MENU/OK

_>).

Key functions

<On/Off> Switch the meter on/off

<MODE> <MODE

<CAL> <CAL

<SC> Switch on or off the stability control

<STO> <STO

<RCL>

<RCL

<PRINT> <PRT

Select measured parameter Activate operation lock

Call up calibration procedure Open menu for calibration data storage

function manually.

Store measured value Open menu for automatic storing function

Open menu for manually stored measured values Open menu for automatically stored measured values

Print Open menu for automatic printing

<▲> Increment values, scroll

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ProLab 2000 Overview

ESC

6.949

24.0

°C

7.29

mg/l

24.0

°C

[SAL]

731 µS/cm 24.0 °C

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Measured parameter

Measured value (with unit)

Temperature display

ID sensor symbol CalClock

Status line

<▼> Decrement values, scroll

<MENU/OK> <MENU/OK

<ESC> Return to higher menu level /

Confirm entries Open setting menu for system settings

Cancel inputs

1.3 Display

The graphic display can display three measured parameters and the current temperature value for each measured parameter at the same time. The illumination enables to read the display even in the darkness.

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Overview ProLab 2000

1.4 Socket field

Connections:

1 Conductivity measuring cell / D.O. electrode

2 pH ions electrode

3 Reference electrode

4 Temperature sensor

5 USB interface

6 Power pack

7 RS232 interface/analog output

CAUTION

Only connect sensors to the meter that cannot return any voltages or currents that are not allowed (> SELV and > current circuit with current limiting). Nearly all commercial sensors - especially SI Analytics sensors fulfill these requirements.

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ProLab 2000 Overview

DIN

BNC

1.5 Automatic sensor recognition

The automatic sensor recognition function enables

 to operate a sensor with different meters without recalibrating

 to operate different sensors with one meter without recalibrating

 to assign measurement data to a sensor

– measurement datasets are always downloaded to the interface

with the sensor type and sensor series number.

– measurement datasets are always stored together with the

sensor type and sensor series number.

 to assign calibration data to a sensor

– calibration data is always downloaded to the interface with the

sensor type and sensor series number.

 the automatic activation of the cell constants for conductivity

sensors

To be able to use the automatic sensor recognition function a meter is required that supports the automatic sensor recognition (e.g. ProLab 2000), and a sensor (ID sensor) that is suitable for sensor recognition.

In every ID sensor, sensor data is stored that clearly identifies the sensor. The sensor data is sent to the meter automatically via radio communication and used for sensor identification there.

Note

With the ProLab 2000 meter, you can also operate non-ID sensors. Then, however, you cannot use the advantages of the sensor recognition function.

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Overview ProLab 2000

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ID sensor symbol

ID sensors SI Analytics ID sensors support the automatic sensor recognition

function. Their sensor designation has the addition "ID", e.g. A 161 1M DIN-ID electrode.

Note

Information on available ID sensors is given on the Internet or directly by SI Analytics.

ID sensors connected to the ProLab 2000 meter can be recognized by the ID sensor symbol on the display of the meter.

Sensor data from ID

sensors

ID sensors transmit the following sensor data to the meter:

 SENSOR ID

– Sensor type

– Sensor series number

 Calibration data

– Calibration date

– Calibration characteristics

– Calibration interval

– Selected buffer set (pH electrodes only)

The calibration data is updated in the ID sensor after each calibration procedure. The ID sensor symbol flashes while this is done.

Note

While the ID sensor symbol is flashing, the sensor must not be disconnected because otherwise the calibration data will not be completely transmitted. The sensor will then have no valid calibration.

Note

If non-ID sensors are used, the calibration data from the meter is used and also stored in the meter.

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ProLab 2000 Overview

ENU

Reader unit for access control

1.6 Electronic access control

The ProLab 2000 always documents measurement data and calibration data with an ID number (USER ID). If the USER ID is assigned to a certain user, all measurement data is also assigned to the user in compliance with GLP.

The USER ID is easily and safely transmitted to the ProLab 2000 via an electronic key. Each electronic key in the form of a keyring pendant contains a key number. The key number is read by the meter via a contactless radio data connection and used as the USER ID.

The meter checks the access authorization for the USER ID. Measurements with an electronic key are only possible if the USER ID is registered in the meter. The measuring data is then documented along with the registered USER ID.

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If the USER ID of the electronic key is not registered in the meter, access to the meter with this electronic key is denied. Anonymous access is always possible. For anonymous access, the USER ID 0 is used automatically.

By labeling measurement data without electronic key with USER ID 0, this data can be separated from the GLP-compliant documentation of measurements.

Overview ProLab 2000

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ProLab 2000 Safety

2 Safety

This operating manual contains basic instructions that you must follow during the commissioning, operation and maintenance of the meter. Consequently, all responsible personnel must read this operating manual before working with the measuring system. The operating manual must always be available within the vicinity of the meter.

Target group The meter was developed for work in the laboratory.

Thus, we assume that, as a result of their professional training and experience, the operators will know the necessary safety precautions to take when handling chemicals.

Safety instructions The individual chapters of this operating manual use the following

safety instruction to indicate various types of danger:

CAUTION

indicates instructions that must be followed precisely in order to avoid the possibility of slight injuries or damage to the meter or the environment.

Further notes

Note

indicates notes that draw your attention to special features.

Note

indicates cross-references to other documents, e.g. operating manuals.

2.1 Authorized use

This meter is authorized exclusively for measurements of the pH, ORP, conductivity, D.O. and ion-selective measurements in the laboratory. The technical specifications as given in chapter 7 T (page 105) must be observed. Only the operation and running of the meter according to the instructions given in this operating manual is authorized. Any other use is considered unauthorized.

ECHNICAL DATA

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Safety ProLab 2000

2.2 General safety instructions

This instrument is built and inspected according to the relevant guidelines and norms for electronic measuring instruments (see page 105). It left the factory in a safe and secure technical condition.

Function and

operational safety

The smooth functioning and operational safety of the meter can only be guaranteed if the generally applicable safety measures and the specific safety instructions in this operating manual are followed during operation.

The smooth functioning and operational safety of the meter can only be guaranteed under the environmental conditions that are specified in chapter 7 T

ECHNICAL DATA (page 105).

If the meter was transported from a cold environment to a warm environment, the formation of condensate can lead to the faulty functioning of the meter. In this event, wait until the temperature of the meter reaches room temperature before putting the meter back into operation.

Safe operation If safe operation is no longer possible, the meter must be taken out of

service and secured against inadvertent operation! Safe operation is no longer possible if the meter:

 has been damaged in transport

 has been stored under adverse conditions for a lengthy period of

time

Obligations of the

purchaser

 is visibly damaged

 no longer operates as described in this manual.

If you are in any doubt, please contact the supplier of the meter.

The purchaser of this meter must ensure that the following laws and guidelines are observed when using dangerous substances:

 EEC directives for protective labor legislation

 National protective labor legislation

 Safety regulations

 Safety datasheets of the chemical manufacturers.

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ProLab 2000 Commissioning

3 Commissioning

3.1 Scope of delivery

 ProLab 2000 laboratory meter

 Power pack

 4 batteries 1.5 V Micro type AAA

 1 electronic administrator key (as keyring pendant)

 1 electronic key (as keyring pendant)

 Cover

 USB cable (Z875)

 CD-ROM with USB driver

 Operating manual

3.2 Power supply

The power pack supplies the meter with low voltage (9 V DC).

The batteries are only used to buffer the system time if the power supply is interrupted.

CAUTION

The line voltage at the operating site must lie within the input voltage range of the original power pack (see page 105).

CAUTION

Use original power packs only (see page 105).

1 Insert the plug into the socket of the meter.

2 Connect the original power pack to an easily accessible power

outlet.

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Commissioning ProLab 2000

3.3 Initial commissioning

Perform the following activities:

 Insert the batteries (see page 97)

 Connect the power pack (see page 19).

 Switch on the meter (see page 21)

 Set the language (see page 25)

 Set the date and time (see page 27)

 Set up the access authorization for electronic keys (see page 29)

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ProLab 2000 Operation

[i] Apply electronic key

or Press OK (anonym. access).

Anonymous access

User

[i] Identification successfull [i]USER ID = 9876543210

User

only with administrator login

4 Operation

4.1 Switch the meter on and off

Switching on

1 Press the <On/Off> key.

The display shows the meter designation and software version. Subsequently, the access control display appears.

2 Start anonymous access with <MENU/OK>.

The meter switches to the measuring mode. or Place the electronic key on the read field and leave it there for approx. 2 seconds until the key has been recognized. The display shows the USER ID that was read.

Switching off

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3 Confirm the displayed data with <MENU/OK>.

The meter switches to the measuring mode.

1 Press the <On/Off> key.

The meter is switched off.

Operation ProLab 2000

4.2 General operating principles

This section contains basic information on the operation of the ProLab 2000.

Operating elements,

display

Operating modes,

navigation

An overview of the operating elements and the display is given on page 10 and page 11.

An overview of the operating modes and navigation of the ProLab 2000 is given on page 22 and page 23.

4.2.1 Operating modes

The meter has the following operating modes:

 Measuring

Measurement data of one to three sensors appears in the measured value display

 Calibration

The course of a calibration with calibration information, functions and settings is displayed

 Storage in memory

The meter stores measuring data automatically or manually

 Transmitting data

The meter transmits measuring data and calibration records to the serial interface automatically or manually.

 Setting

The system menu or a sensor menu with submenus, settings and functions is displayed

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ProLab 2000 Operation

General Measurement Interface Clock function Service information Reset

System

Language: English Beep

: On

Illumination

: On

Contrast: 48 %

System

4.2.2 Navigation

Measured value display In the measured value display, you can

 select a measuring window with <▲><▼> and open the relevant

measuring menu with <MENU/OK>.

 open the system menu with the sensor-independent settings with

<MENU/OK

_>.

 change the display in the selected measuring window (e. g. pH <−>

mV) by pressing <MODE>.

Menus and dialogs The menus for settings and dialogs contain further submenus. The

selection is made with the <▲><▼> keys. The current selection is displayed in a frame.

 Submenus

The name of the submenu is displayed at the upper edge of the frame. Submenus are opened by confirming with <MENU/OK>. Example:

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 Settings

Settings are indicated by a colon. The current setting is displayed on the right-hand side. The setting mode is opened with <MENU/OK>. Subsequently, the setting can be changed with <▲><▼> and <MENU/OK>. Example:

Operation ProLab 2000

Calibration record Buffer

: NIST/DIN

Calibration interval: 7 d Unit for zero point pH Unit for slope

: mV/pH

[i] 2.00 4.01 7.00 10.01

[i] Buffer series NIST/DIN [i] Immerse sensor in buffer 1

Set temperature: 25 °C Continue

 Functions

Functions are indicated by the name of the function. They are immediately carried out by confirming with <MENU/OK>. Example: Display the Calibration record function.

Messages Information or operating instructions are designated by the [i] symbol.

They cannot be selected. Example:

Note

The principles of navigation are explained in the two following sections by reference of examples:

 Setting the language (see page 25)

 Setting the date and time (see page 27)

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ProLab 2000 Operation

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Data storage Display System

Storage & config

General Measurement Interface Clock function Service information Reset

System

4.2.3 Navigation example 1: Setting the language

1 Switch on the meter (see page 21)

2 In the measured value display:

Open the system menu with <MENU/OK (press for approx. 2 s). The meter is in the setting mode.

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3 Select the System submenu with <▲><▼>.

The current selection is displayed in a frame.

4 Open the System submenu with <MENU/OK>.

Operation ProLab 2000

Language: English Beep

: Off

Illumination: On Contrast

: 48 %

System

Language: English Beep

: Off

Illumination: On Contrast

: 48 %

System

5 Select the General submenu with <▲><▼>.

The current selection is displayed in a frame.

6 Open the General

submenu with <MENU/OK>.

7 Open the setting mode for the Language with <MENU/OK>.

8 Select the required language with <▲><▼>.

9 Confirm the setting with <MENU/OK>.

The setting becomes active the next time the system menu is called up.

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ProLab 2000 Operation

Time: 14:53:40 Date

: 26.04.06

Date format: dd.mm.yy

System

4.2.4 Navigation example 2: Setting the date and time

The meter has a clock with a date function. The date and time are indicated in the status line of the measured value display. This indication can be switched off. When storing measured values and calibrating, the current date and time are automatically stored as well.

The correct setting of the date, time and date format is important for the following functions and displays:

 Current date and time

 Calibration date

 Identification of stored measured values.

Therefore, check the time at regular intervals.

Note

After a drop of the voltage of the buffer batteries (empty batteries), the date and time are reset and have to be adjusted again.

Setting the date, time

and date format

The data format can be switched from the display of day, month, year (dd.mm.yy) to the display of month, day, year (mm/dd/yy or mm.dd.yy).

1 In the measured value display:

Open the system menu with <MENU/OK (press for approx. 2 s). The meter is in the setting mode.

2Using <▲><▼> and <MENU/OK>, select and confirm the

System / Clock function menu. The setting menu for the date and time appears.

3 Using <▲><▼> and <MENU/OK>, select and confirm the Time

menu. The seconds are highlighted.

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4 Change and confirm the setting with <▲><▼> and <MENU/

OK>. The minutes are highlighted.

Operation ProLab 2000

5 Change and confirm the setting with <▲><▼> and <MENU/

OK>.

The hours are highlighted.

6 Change and confirm the setting with <▲><▼> and <MENU/

OK>. The time is set.

7 If necessary, set the Date and Date format. The setting is made

similarly to that of the time.

8 If necessary, select and set the Date with <▲><▼> and

<MENU/OK>.

9 To make further settings, switch to the next higher menu level

with <ESC>. or Switch to the measured value display with <MODE>. The meter is in the measuring mode.

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ProLab 2000 Operation

[i] Apply electronic key

or Press OK (anonym. access).

Anonymous access

User

4.3 Access control

When the meter is delivered, only the enclosed electronic administrator key has an access authorization for the meter. The administrator can set up access authorizations for electronic keys (see below). Anonymous access (USER ID: 0) is always possible.

4.3.1 Administrating access authorizations

The ProLab 2000 provides basic functions to administrate access authorizations. The administrator can set up, erase and display access authorizations. The administrating functions are available to the administrator immediately after registration only.

1 When the meter is switched on:

Switch off the meter with <On/Off>.

2 Press the <On/Off> key.

The display shows the meter designation and software version. Subsequently, the access control display appears.

3 Place the electronic administrator key on the read field and

leave it there for approx. 2 seconds until the key has been recognized.. The USER ID and the functions for access control are displayed.

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Operation ProLab 2000

[i] Identification successfull [i]USER ID = 9876543210

User

Adding new USER IDs

Displaying registered

USER IDs

Erasing a registered

USER ID

4 Using <▲><▼> and <MENU/OK>, select and confirm the

menu item, Register USER ID. An info text for registration is displayed.

5 Place the electronic key on the reader field.

The USER ID is displayed and registered.

6 Use <MENU/OK> to complete the registration.

7 Using <▲><▼> and <MENU/OK>, select and confirm the

USER ID menu item.

8 Using <▲><▼>, display the registered USER IDs individually.

9 If necessary (e.g. for deleting), confirm a USER ID with

<MENU/OK>.

10 Using <▲><▼> and <MENU/OK>, select and confirm the

Erase menu item. A safety query appears. After confirming the erasure, the access authorization for the currently displayed key number is erased.

Outputting a list of the

registered USER IDs

Switching to the

measuring mode

11 Using <▲><▼> and <MENU/OK>, select and confirm the

menu item, Output to RS232/USB. The list of all key numbers with access authorization is downloaded to the interface.

12 Confirm the data with <MENU/OK>.

The meter switches to the measuring mode.

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ProLab 2000 Operation

4.3.2 Lost your electronic key?

Without an electronic key with access authorization, anonymous access is possible only: (USER ID 0).

Electronic key Keys for additional users are available from SI Analytics GmbH.

The access authorization for new keys is set up by the administrator (see page 29).

Electronic administrator

key

Activating the lock

If the electronic administrator key is lost, the access authorization for a new electronic administrator key can be set up in the factory only.

The addresses and telephone numbers of SI Analytics GmbH are given on the cover of this operating manual.

4.3.3 Lock

The activated lock prevents the inadvertent usage of the meter or registered USER ID during running operation. The lock can only can only be released with the currently registered electronic key or the administrator key.

Note

The lock can only be activated in the measuring mode of operation. With anonymous access (USER ID: 0), the lock function is not available.

1 If necessary, switch to the measuring mode with <MODE>.

2Use <MODE

The registered USER ID is locked against inadvertent use.

_> to activate the lock.

Releasing the lock

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1 Press any key.

2 Place the registered electronic key or administrator key on the

reader field. Place the registered electronic user key or administrator key on the read field and leave it there for approx. 2 seconds until the key has been recognized. The lock is released.

Operation ProLab 2000

4.4 System settings (system menu)

The system menu comprises the following settings:

 Data storage (see page 32)

 Display (see page 32)

 System (see page 34).

4.4.1 Data storage

This menu contains all functions to display, edit and erase stored measured values and calibration records.

Note

Detailed information on the data storage functions of the ProLab 2000 is given on page 80.

4.4.2 Display

With the aid of the Display submenu, you can modify the measured value display to meet your requirements. When doing so, you can display or hide the following elements:

 Individual measured parameters

 Date indication in the status line

 Time indication in the status line

Settings In the measured value display, open the system menu with <MENU/

_>. After completing the settings, switch to the measured value

display with <MODE>.

Menu item Setting Description

Display / pH: On

Off

Display of the pH/ISE measuring window. This menu item is only visible if the combination electrode and an additional sensor are connected.

Display / Cond: On

Off

Display of the conductivity measuring window. This menu item is only visible if a conductivity measuring cell is connected.

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ProLab 2000 Operation

Menu item Setting Description

Display / Oxi: On

Off

Display / Time: On

Off

Display / Date: On

Off

Display of the D.O. measuring window. This menu item is only visible if a D.O. sensor is connected.

Display of the time in the system status line

Display of the date in the system status line

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Operation ProLab 2000

4.4.3 System

Overview The following sensor-independent meter features can be adjusted in

the system menu/System and its submenus:

 Menu language

 Beep on keystroke

 Display illumination

 Display contrast

 Unit of the temperature display

 Data interface

 Clock and date function

 Function to reset all sensor-independent system settings to the

default condition

Settings In the measured value display, open the system menu with <MENU/

_>. After completing the settings, switch to the measured value

display with <MODE>.

Menu item Setting Description

System / General / Language

System / General / Beep

System / General / Illumination

System / General / Contrast

System / Measurement / Temperature unit

System / Measurement / Stability control

Deutsch English (further)

On Off

0 ... 100 % Change the display contrast

°C °F

Auto Off

Select the menu language

Switch on/off the beep on keystroke

Switch the display illumination on/off

Temperature unit, degrees Celsius or degrees Fahrenheit. All temperatures are displayed with the selected unit.

Switch on or off the automatic Stability control (see page 35).

System / Interface / Baud rate

1200, 2400, 4800, 9600, 19200

Baud rate of the data interface

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ProLab 2000 Operation

Menu item Setting Description

System / Interface / Output format

ASCII CSV

Output format for data transmission For details, see page 90

System / Interface / Output header

System /Clock function

Time Date

The header is output to the interface in csv format.

Settings of time and date. For details, see page 27

Date format

System /Service information

Meter information: Series number and software version

System /Reset - Resets the system settings to

the default values. For details, see page 95

4.4.4 Automatic Stability control

The automatic Stability control function continuously checks the stability of the measurement signal. The stability has a considerable impact on the reproducibility of measured values.

You can activate or switch off the automatic Stability control function (see page 34).

The automatic Stability control function is carried out:

 as soon as the measured value is outside the allowed stability range

 when you switch over between the measured parameters with

<MODE>.

In this case, the measured parameter flashes on the display.

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Operation ProLab 2000

4.5 pH value / ORP voltage

4.5.1 General information

You can measure the following variables:

 pH value [ ]

 ORP [mV]

CAUTION

When connecting an earthed PC/printer, measurements cannot be performed in earthed media as incorrect values would result. The RS232 and USB interfaces are not galvanically isolated.

Temperature

measurement

For reproducible pH measurements, it is essential to measure the temperature of the test sample. You have the following options to measure the temperature:

 Automatic measurement of the temperature by the temperature

sensor (NTC30 or Pt1000) integrated in electrode.

 Measurement by an external temperature sensor.

 Manual determination and input of the temperature.

The display of the temperature indicates the active temperature measuring mode:

Temperature

sensor

Resolution of the

temp. display

Mode

yes 0.1 °C Automatic

with temperature sensor

- 1°C Manual

Preparatory activities Perform the following preparatory activities when you want to measure:

1 Connect a pH or ORP electrode to the meter.

2 If necessary, select the pH or mV display with <MODE>.

3 Adjust the temperature of the solutions and measure the

current temperature if the measurement is made without a temperature sensor.

4 Calibrate or check the meter with the electrode.

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ProLab 2000 Operation

6.949

24.8 °C

26.04.06 10:37

4.5.2 Measuring the pH value

1 Perform the preparatory activities (see page 36).

2 Immerse the pH electrode in the test sample.

3 Select the pH or mV display with <MODE>.

Stability control The Stability control function checks the stability of the measurement

signal. The stability has a considerable impact on the reproducibility of measured values. The display of the measured parameter flashes until a stable measured value is available.

Independent of the setting for automatic Stability control (see page 35) in the System menu, you can start the Stability control function manually at any time.

1 If necessary, select a channel (measured value) with <▲><▼>.

2 Freeze the measured value with <SC>.

The display switches to the display of the selected channel as necessary. In the status line, [SC] is displayed.

3 With <MENU/OK> activate the Stability control function.

[SC] flashes while the stability control is active. As soon as a stable measured value is recognized, the current measurement data is downloaded to the interface. The measured values of all channels meeting the criterion for stability control are marked by SC.

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Note

You can terminate prematurely the Stability control function with <MENU/OK> manually at any time. If the Stability control function is terminated prematurely, the current measurement data is not downloaded to the interface.

Operation ProLab 2000

4 Using <SC> or <MODE>, release the frozen measured value.

The [SC] status display disappears. The display switches to the previous indication.

Criteria With identical measurement conditions, the following applies:

Measured

Reproducibility Response time

parameter

pH value Better than 0.01 > 15 seconds

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ProLab 2000 Operation

157.0 mV

24.8 °C

26.04.06 10:37

4.5.3 Measuring the ORP

Note

ORP electrodes are not calibrated. However, you can check ORP electrodes using a test solution.

1 Perform the preparatory activities (see page 36).

2 Immerse the ORP electrode in the test sample.

3 Select the mV display with <MODE>.

Stability control The Stability control function checks the stability of the measurement

signal. The stability has a considerable impact on the reproducibility of measured values. The display of the measured parameter flashes until a stable measured value is available.

Independent of the setting for automatic Stability control (see page 35) in the System menu, you can start the Stability control function manually at any time.

1 If necessary, select a channel (measured value) with <▲><▼>.

2 Freeze the measured value with <SC>.

The display switches to the display of the selected channel as necessary. In the status line, [SC] is displayed.

3 With <MENU/OK> activate the Stability control function.

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Note

You can terminate prematurely the Stability control function with <MENU/OK> manually at any time. If the Stability control function is terminated prematurely, the current measurement data is not

Operation ProLab 2000

downloaded to the interface.

4 Using <SC> or <MODE>, release the frozen measured value.

The [SC] status display disappears. The display switches to the previous indication.

Criteria With identical measurement conditions, the following applies:

Measured

Reproducibility Response time

parameter

ORP voltage better than 0.3 mV > 15 seconds

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ProLab 2000 Operation

4.5.4 Settings for pH and ORP measurements

Overview The following settings are possible for pH and ORP measurements:

 Resolution

 Calibration interval

 Buffers for calibration

 Unit for zero point

 Unit for slope

 Calibration record (display)

 Calibration history

Settings The settings are made in the measuring menu of the pH/ORP

measurement. To open it, activate the relevant measuring window in the measured value display and press <MENU/OK>. After completing the settings, switch to the measured value display with <MODE>.

Menu item Possible setting Description

Calibration / Calibration record

- Displays the calibration

record of the last calibration.

Calibration / Calibration history

- Displays the calibration

history of the last calibrations.

Calibration /Buffer NIST/DIN

TEC ...

Calibration /

1 ... 999 d Calibration interval for the

Calibration interval

Buffer sets to be used for pH calibration (see page 43).

pH electrode (in days). The meter reminds you to calibrate regularly by the flashing CalClock in the measuring window.

Calibration /Unit for zero point

Calibration /Unit for slope

mV pH

mV/pH %

Unit for the zero point.

Unit of the slope. The % display refers to the Nernst slope of

-59.16 mV/pH ([determined slope/Nernst slope] x 100).

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Operation ProLab 2000

Menu item Possible setting Description

Man. temperature -20 ... +130 °C Entry of the manually

determined temperature. For measurements without temperature sensor only.

Reset - Resets all sensor settings

to the delivery condition (see page 93).

High resolution pH On

Off

High resolution mV On

Off

Resolution of the pH display:

On = 0.001 Off = 0.01

Resolution of the mV display:

On = 0.1 mV Off = 1 mV

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ProLab 2000 Operation

4.5.5 pH calibration

Why calibrate? pH electrodes age. This changes the zero point (asymmetry) and slope

of the pH electrode. As a result, an inexact measured value is displayed. Calibration determines the current values of the zero point and slope of the electrode and stores them. Thus, you should calibrate at regular intervals.

When do you have to

calibrate?

Buffer sets for

calibration

 After connecting a non-ID electrode

 If the CalClock has expired and flashes

You can use the buffer sets quoted in the table for an automatic calibration. The pH values are valid for the specified temperature values. The temperature dependence of the pH values is taken into account during the calibration.

No. Buffer set * pH values at

1 DIN buffers according to DIN

19266 and NIST Traceable Buffers

1.679

4.006

6.865

25 °C

9.180

12.454

2 Technical buffers 2.000

25 °C

4.010

7.000

10.011

3 Merck1* 4.000

20°C

7.000

9.000

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4 Merck2 * 1.000

6.000

8.000

13.000

5 Merck3 * 4.660

6.880

9.220

6 Merck4 * 2,000

4,000 7,000

10,000

7 Merck5 * 4,010

7,000

10,000

20°C

20 °C

25 °C

Operation ProLab 2000

No. Buffer set * pH values at

8 DIN 19267 1.090

4.650

6.790

9.230

9 Mettler US * 1.679

4.003

7.002

10.013

10 Mettler EU * 1.995

4.005

7.002

9.208

11 Fisher 1* 2.007

4.002

7.004

10.002

12 Fluka BS * 4.006

6.984

8.957

13 Radiometer * 1.678

4.005

7.000

9.180

25 °C

14 Baker * 4.006

6.991

10.008

15 Metrohm * 3.996

7.003

8.999

16 Beckman * 4.005

7.005

10.013

17 Hamilton DC * 4.005

7.002

10.013

18 Precisa * 3.996

7.003

8.999

25 °C

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ProLab 2000 Operation

No. Buffer set * pH values at

19 Reagecon TEC * 2,000

25 °C 4,010 7,000

10,000

20 Reagecon 20 * 2,000

20 °C 4,000 7,000

10,000 13,000

21 Reagecon 25 * 2,000

25 °C 4,000 7,000

10,000 13,000

22 Riedel-de Haen * 2,000

20 °C 4,000 7,000

10,000

* Brand names or trade names are trademarks of their respective

owners protected by law (see page 116).

Note

The buffers are selected in the sensor menu (Buffer setting, see page 41).

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Operation ProLab 2000

Calibration points Calibration can be performed using one to five buffer solutions in any

order (single-point to five-point calibration). The meter determines the following values and calculates the calibration line as follows:

Determined

Displayed calibration data

values

1-point ASY  Zero point = ASY

 Slope = Nernst slope

(-59.16 mV/pH at 25 °C)

2-point ASY

SLO

3-point to 5-point

ASY SLO

 Zero point = ASY

 Slope = SLO

 Zero point = ASY

 Slope = SLO

The calibration line is calculated by linear regression.

Note

You can display the slope in the units, mV/pH or % (see page 34).

Stability control The calibration procedure automatically activates the stability control

function. The current measurement with stability control can be terminated at any time (accepting the current value).

Calibration record When finishing a calibration, the new calibration values are displayed

Display of calibration

data and download to

interface

as an informative message ([i] symbol) first. Then you can decide

whether you want to take over these values of the new calibration or whether you want to continue measuring with the old calibration data. After accepting the new calibration values the calibration record is displayed.

You can have the data of the last calibration displayed (see page 87). Subsequently, you can transmit the displayed calibration data to the interface, e. g. to a printer or PC, with the <PRINT> key.

Note

The calibration record is automatically transmitted to the interface after calibrating.

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ProLab 2000 Operation

Printing date 26.04.06 16:13 ProLab 2000

Ser. no. 06249876 USER ID: 1234567890

CALIBRATION pH Calibration date 20.04.06 10:14:03

A 161 1M DIN-ID

Ser. no. A062498765 USER ID: 1234567890

Cal. interval 7 d

NIST/DIN

Buffer 1 6.86 Buffer 2 9.18 Voltage 1 7.2 mV 26.3 °C Voltage 2 -171 mV 26.3 °C Slope -59.2 mV/pH

Zero point -0.5 mV Sensor +++

Sample record:

Note

If non-ID sensors are used, the sensor type and series number are not output in the calibration record.

Calibration evaluation After calibrating, the meter automatically evaluates the calibration. The

zero point and slope are evaluated separately. The worse evaluation of both is taken into account. The evaluation appears on the display and in the calibration record.

Display Calibration

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Clean the electrode according to the sensor operating manual

CalError CalError

Eliminate the error according to chapter 6 W (page 99)

record

+++ -18 ... +18 -60.5 ... -57.5

++ -22 ... + 22 -57.5 ... -56

+ -26 ... +26 -61 ... -60.5

- -30 ... +30 -62 ... -61

HAT TO DO IF...

Zero point [mV] Slope

[mV/pH]

-56 ... -55

-55 ... -50

< -30 or > 30

... -62 or ... -50

Operation ProLab 2000

Preparatory activities Perform the following preparatory activities when you want to calibrate:

1 Connect a pH electrode to the meter.

The pH measuring window is displayed.

2 Keep the buffer solutions ready. Adjust the temperature of the

buffer solutions, or measure the current temperature, if you measure without a temperature sensor.

4.5.6 Calibration interval

The calibration interval and calibration evaluation are indicated on the display as the CalClock.

CalClock

Setting the calibration

interval

The remaining time of the calibration interval is indicated by the segmented ring around the calibration evaluation. This segmented ring reminds you to calibrate regularly.

After the specified calibration interval has expired the outside circle of the CalClock flashes. It is still possible to measure.

Note

To ensure the high measuring accuracy of the measuring system, calibrate after the calibration interval has expired.

The calibration interval is set to 7 (d7) days in the factory. You can change the interval (1 ... 999 days):

1 Open the menu for measurement settings with <MENU/OK>.

2In the Calibration / Calibration interval menu, set the calibration

interval with <▲><▼>.

3 Confirm the setting with <MENU/OK>.

4 Exit the menu with <MODE>.

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ProLab 2000 Operation

[i] Buffer series NIST/DIN [i] Immerse sensor in buffer 1

Continue

pH <CAL>

[i] Buffer value = 6.865 [i] U = 3.0 mV [i] Temperature =

24.8 °C

Terminate stability control

Recognized nominal buffer value (referring to 25 °C)

Current electrode voltage

Current temperature value

pH <CAL>

4.5.7 Calibrating

Make sure the Buffer setting is correctly set in the sensor menu (see page 41).

Use any one to five buffer solutions of the selected buffer set in ascending or descending order.

The NIST/DIN calibration is described below. With other buffer sets, other nominal buffer values are displayed. Apart from that, the procedure is identical.

1 Press <▲><▼><MODE> to select the measured parameter pH

or mV in the measured value display.

2 Start the calibration with <CAL>.

The calibration display appears.

3 Immerse the electrode in buffer solution 1.

4 If the Set temperature menu item appears, measure and enter

the temperature of the buffer manually (measurement without temperature sensor).

5 Select Continue with <▲><▼> and press <MENU/OK>. The

buffer is measured. The measured value is checked for stability (Stability control).

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Operation ProLab 2000

[i] Buffer series NIST/DIN [i] Immerse sensor in buffer 2

Exit with one point calibration Continue

pH <CAL>

6 Wait for the end of the measurement with Stability control or

accept the calibration value with <MENU/OK>. The calibration display for the next buffer appears.

7 For single-point calibration, select Exit with one point

calibration with <▲><▼> and confirm with <MENU/OK>. The calibration is completed as a single-point calibration. The new calibration values are displayed as a message ([i]).

You have the following options:  Accept the new calibration values with <MENU/OK>.

Subsequently, the calibration record is displayed and downloaded to the interface at the same time.

Continuing with two-

point calibration

(Buffer: NIST/DIN)

 To switch to the measured value display without

accepting

the new calibration values, press <MODE> or <ESC>.

Note

For single-point calibration, the meter uses the Nernst slope (-59.16 mV/pH at 25 °C) and determines the zero point of the electrode.

8 Thoroughly rinse the electrode with distilled water.

9 Immerse the electrode in buffer solution 2.

10 If the Set temperature menu item appears, measure and enter

the temperature of the buffer manually (measurement without temperature sensor).

11 Select Continue with <▲><▼> and press <MENU/OK>. The

buffer is measured. The measured value is checked for stability (Stability control).

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ProLab 2000 Operation

[i] Buffer value = 9.18 [i] U = -167.0 mV [i] Temperature =

24.8 °C

Terminate stability control

pH <CAL>

[i] Buffer series NIST/DIN [i] Immerse sensor in buffer 3

Exit with 2 point calibration Continue

pH <CAL>

12 Wait for the measurement with stability control to be completed

or Terminate stability control with <MENU/OK> and accept the calibration value. The calibration display for the next buffer appears.

Continuing with three-

point to five-point

(Buffer NIST/DIN)

calibration

13 For two-point calibration, select Exit with 2 point calibration with

<▲><▼> and confirm with <MENU/OK>. The calibration is completed as a two-point calibration. The new calibration values are displayed as a message ([i]).

You have the following options:  Accept the new calibration values with <MENU/OK>.

Subsequently, the calibration record is displayed and downloaded to the interface at the same time.

 To switch to the measured value display without

accepting

the new calibration values, press <MODE> or <ESC>.

14 Thoroughly rinse the electrode with distilled water.

15 Immerse the electrode in buffer solution 3.

16 If necessary, measure the temperature of buffer 3 manually,

then enter and confirm it with <▲><▼> and <MENU/OK> in the Set temperature setting.

17 Select Continue with <▲><▼> and press <MENU/OK>. The

buffer is measured. The measured value is checked for stability (Stability control).

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Operation ProLab 2000

[i] Buffer value = 4.010 [i] U = 184.0 mV [i] Temperature =

24.8 °C

Terminate with ... Terminate stability control

pH <CAL>

18 Switch to measurement of the next buffer with <MENU/OK>.

or When all buffers have been measured, use <▲><▼> to select the Terminate with ... menu item and confirm with <MENU/ OK>. The calibration procedure is terminated.

The new calibration values are displayed as a message ([i]).

You have the following options:  Accept the new calibration values with <MENU/OK>.

Subsequently, the calibration record is displayed and downloaded to the interface at the same time.

 To switch to the measured value display without

accepting

the new calibration values, press <MODE> or <ESC>.

Note

After a five-point calibration the calibration procedure is automatically terminated. The menu item Terminate with ... is not displayed.

Note

The calibration line is calculated by linear regression.

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ProLab 2000 Operation

4.6 Ion concentration

4.6.1 General information

Note

Incorrect calibration of ion sensitive electrodes will result in incorrect measured values. Calibrate regularly before measuring.

CAUTION

When connecting an earthed PC/printer, measurements cannot be performed in earthed media as incorrect values would result. The RS232 and USB interfaces are not galvanically isolated.

Temperature

measurement with ISE

measurements

For reproducible measurements of the ion concentration, it is essential to measure the temperature of the test sample. You have the following options to measure the temperature:

 Measurement by a temperature sensor.

 Measurement of the temperature by the integrated temperature

sensor of a simultaneously connected D.O. sensor or conductivity measuring cell in the test sample.

 Manual determination and input of the temperature.

The meter recognizes whether a suitable sensor is connected and automatically switches on the temperature measurement.

The display of the temperature indicates the active temperature measuring mode:

Temperature

sensor

Resolution of the

temp. display

Mode

- 1°C Manual

yes 0.1 °C Automatic with

temperature sensor

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yes 0.1 °C,

measured temperature value flashes

The temperature value of the second sensor (Cond or Oxi) in the same test sample is taken over for measurement*

* If this is not required you can unplug the second sensor and enter the temperature manually.

Operation ProLab 2000

ISE

0.157 mg/l

25 °C

Preparatory activities Perform the following preparatory activities when you want to measure:

1 Connect the ISE combination electrode to the meter.

The pH/ISE measuring window is displayed.

2 If necessary, select the ISE display (unit, mg/l) with <MODE>.

3 Measure the temperature of the test sample using a

thermometer.

4 Calibrate or check the meter with the electrode.

Note

While no valid calibration is available, e.g. in the delivery condition, "Error" appears in the measured value display.

4.6.2 Measuring the ion concentration

1 Perform the preparatory activities according to page 53.

2 Immerse the electrode in the test sample.

Stability control The Stability control function checks the stability of the measurement

signal. The stability has a considerable impact on the reproducibility of measured values. The display of the measured parameter flashes until a stable measured value is available.

Independent of the setting for automatic Stability control (see page 35) in the System menu, you can start the Stability control function manually at any time.

1 If necessary, select a channel (measured value) with <▲><▼>.

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ProLab 2000 Operation

2 Freeze the measured value with <SC>.

The display switches to the display of the selected channel as necessary. In the status line, [SC] is displayed.

3 With <MENU/OK> activate the Stability control function.

Note

You can terminate prematurely the manual Stability control function with <MENU/OK> manually at any time. If the manual Stability control function is terminated prematurely, the current measurement data is not downloaded to the interface.

Criteria With identical measurement conditions, the following applies:

Temperature while

calibrating and

measuring

Overview The following settings are possible for ISE measurements:

4 Using <SC> or <MODE>, release the frozen measured value.

The [SC] status display disappears. The display switches to the previous indication.

Measuring signal Reproducibility Response time

Electrode

better than 0.1 mV > 30 seconds

voltage

For precise ISE measurements the temperature difference between measurement and calibration should not be greater that 2 K. Therefore, adjust the temperature of the standard and measuring solutions accordingly. If the temperature difference is greater the [TempErr] warning appears in the measured value display.

4.6.3Settings for ISE measurements

 Calibration record (display)

Settings The settings are made in the measuring menu of the ISE

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 Calibration history

measurement. To open it, activate the relevant measuring window in the measured value display and press the <MENU/OK> key. After completing the settings, switch to the measured value display with

<MODE>.

Operation ProLab 2000

Menu item Possible

Description

setting

Calibration / Calibration record

Calibration / Calibration history

- Displays the calibration record of the last calibration.

- Displays the calibration history of the last calibrations.

Man. temperature -20 ... +130 °C Entry of the manually

determined temperature. For measurements without temperature sensor only.

Ion type Ag, Br, Ca, Cd,

Cl, CN, Cu, F,

Selection of the ion type to be measured

I, K, Na, NO3, Pb, S, NH3, NH4, CO2

Unit mol/l, mg/kg,

ppm, %, mg/l

Selection of the unit for the display of the measurement result and calibration standards.

Density 0.001 ... 9.999

g/ml, kg/l

Adjustable density of the test sample (only with Unit: mg/kg, ppm, %)

4.6.4 Calibrating for ISE measurements

Why calibrate? Ion-selective electrodes age and are temperature-dependent. This

changes the slope. As a result, an inexact measured value is displayed. Calibration determines the current value of the slope of the electrode and stores it in the instrument.

Thus, you should calibrate before each measurement and at regular intervals.

When to calibrate?  Before any measurement if possible

 After connecting another ISE electrode

 When the CalClock flashes, e. g. after a voltage interruption

Standard solutions Use two to seven different standard solutions. The standard solutions

have to be selected in either increasing or decreasing order.

Note

The unit of the standard solution and measurement result is selected in the Calibration / Unit menu.

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ProLab 2000 Operation

Standard solution (Std 1 - 7) Values [mg/l]

Unit [mg/l] 0.010 ... 500000

Unit [mol/l] 0.100 ... 5000 µmol/l

10.00 ... 5000 mmol/l

Unit [mg/kg] 0.010 ... 500000

Unit [ppm] 0.010 ... 500000

Unit [%] 0.001 ... 50000

Note

The measurement precision is also dependent on the selected standard solutions. Therefore, the selected standard solutions should cover the expected value range of the subsequent concentration measurement.

Temperature while

calibrating and

measuring

ISE Cal This is the conventional two-point to seven-point calibration

procedure that uses 2 to 7 freely selectable standard solutions. The

concentration expected in the measurement determines the concentration of the calibration standards.

Stability control During calibration, the stability control is automatically activated.

The current measurement with stability control can be terminated at any time (accepting the current value).

Calibration record When finishing a calibration, the new calibration values are displayed

as an informative message ([i] symbol) first. Then you can decide

Note

Based on the calibration data, the calibration line is determined in sections according to the Nernst equation modified by Nikolski.

Display of calibration

data and download to

interface

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You can have the data of the last calibration displayed (see page 87). Subsequently, you can transmit the displayed calibration data to the interface, e. g. to a printer or PC, with the <PRINT> key.

Operation ProLab 2000

Printing date 26.04.06 16:13 ProLab 2000

Ser. no. 06249876 USER ID: 1234567890

Calibration ISE

Calibration date 20.04.06 10:14:03 USER ID: 1234567890

Standard 1 0.010 mg/l Standard 2 0.020 mg/l Voltage 1 0.0 mV 24.0 °C Voltage 2 9.0 mV 24.0 °C Slope 29.9 mV Sensor +++

Note

The calibration record is automatically transmitted to the interface after calibrating.

Sample record:

Calibration evaluation After calibrating, the meter automatically evaluates the calibration.

Display Calibration

Magnitude of the slope [mV]

record

+++ 50.0 ... 70.0 or 25.0 ... 35.0

Error Error

Eliminate the error according to chapter 6 W

HAT TO DO IF...

< 50 or > 70 or < 25 or > 35

(page 99)

Preparatory activities Perform the following preparatory activities when you want to calibrate:

1 Connect the ISE combination electrode to the meter.

The pH/mV/ISE measuring window is displayed.

2 Keep the standard solutions ready.

3 Measure the temperature of the standard solutions using a

thermometer.

Carrying out an

ISE calibration

Proceed as follows to calibrate the meter:

1 In the measured value display, select the ISE measuring

window with <▲><▼> and <MODE>.

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ProLab 2000 Operation

[i] Immerse sensor in std. 1

Set temperature:24 °C Continue Set standard: 0.010 mg/l

ISE <CAL>

[i] Standard = 0.010 mg/l [i] U = 0.5 mV

Terminate stability control

ISE <CAL>

2 Start the calibration with <CAL>.

The calibration display appears.

3 Thoroughly rinse the electrode with distilled water.

4 Immerse the electrode in standard solution 1.

5 Using <▲><▼>, select the Set standard setting and press

<MENU/OK> .

6 Set the concentration of the standard solution with <▲><▼>

and press <MENU/OK>.

7 Measure the temperature of the standard solution using a

thermometer.

8 Select the Set temperature setting with <▲><▼> and press

<MENU/OK>.

9 Set the temperature with <▲><▼> and press <MENU/OK>.

10 Select Continue with <▲><▼> and press <MENU/OK>.

The standard solution is measured. The measured value is checked for stability (Stability control).

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11 Wait for the end of the measurement with Stability control or

accept the calibration value with <MENU/OK>. The calibration display for the next standard solution appears.

Operation ProLab 2000

[i] #1 0.010 mg/l 24 °C [i] Immerse sensor in std. 2

Set temperature:24 °C Continue Set standard: 0.020 mg/l

ISE <CAL>

[i] Standard = 0.020 mg/l [i] U = 8.4 mV

Terminate stability control

ISE <CAL>

Continuing with two-

point calibration

12 Thoroughly rinse the electrode with distilled water.

13 Immerse the electrode in standard solution 2.

14 Using <▲><▼>, select the Set standard setting and press

<MENU/OK> .

15 Set the concentration of the standard solution with <▲><▼>

and press <MENU/OK>.

16 Measure the temperature of the standard solution using a

thermometer.

17 Select the Set temperature setting with <▲><▼> and press

<MENU/OK>.

18 Set the temperature with <▲><▼> and press <MENU/OK>.

19 Select Continue with <▲><▼> and press <MENU/OK>.

The standard solution is measured. The measured value is checked for stability (Stability control).

20 Wait for the end of the measurement with Stability control or

accept the calibration value with <MENU/OK>. The calibration display for the next standard solution appears.

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ProLab 2000 Operation

[i] #2 0.020 mg/l 24 °C [i] Immerse sensor in std. 3

Set temperature: 24 °C

Continue Exit with 2 point calibration Set standard: 0.050 mg/l

ISE <CAL>

21 For two-point calibration, select Exit with 2 point calibration with

<▲><▼> and confirm with <MENU/OK>. The calibration is completed as a two-point calibration. The new calibration values are displayed as a message ([i]).

You have the following options:  Accept the new calibration values with <MENU/OK>.

Subsequently, the calibration record is displayed and downloaded to the interface at the same time.

Continuing with three-

point to seven-point

calibration

 To switch to the measured value display without

accepting

the new calibration values, press <MODE> or <ESC>.

Repeat the steps 12 to 20 in the same way with the third and further standard solutions as necessary. After finishing the last calibration

step, the new calibration values are displayed as a message ([i]).

You have the following options:  Accept the new calibration values with <MENU/OK>. Subsequently,

the calibration record is displayed and downloaded to the interface at the same time.

 To switch to the measured value display without

accepting the new

calibration values, press <MODE> or <ESC>.

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Operation ProLab 2000

4.7 Conductivity

4.7.1 General information

You can measure the following variables:

 Conductivity

 Resistivity

 Salinity

 Total dissolved solids (TDS)

The meter provides the following functions:

 AutoRange (automatic switchover of the measurement range). If a

measuring range is exceeded, AutoRange causes the meter to automatically change to the next higher measuring range and back again. Therefore, the instrument always measures in the measuring range with the highest possible resolution.

 Stability control to check the stability of the measurement signal.

This ensures the reproducibility of the measuring signal. The display of the measured parameter flashes until a stable measured value is available.

Temperature

measurement

The LF413T(-ID), LFOx1400(-ID) and LF313T(-ID) conductivity measuring cells have an integrated temperature sensor.

CAUTION

When connecting an earthed PC/printer, measurements cannot be performed in earthed media as incorrect values would result. The RS232 and USB interfaces are not galvanically isolated.

Preparatory activities Perform the following preparatory activities when you want to measure:

1 Connect a conductivity measuring cell to the meter.

The conductivity measuring window is displayed.

2 Check whether the Measuring cell and cell constant settings

are suitable for the connected conductivity measuring cell. If necessary, correct the settings.

Note

The selection of the measuring cell and setting of the cell constant is made in the conductivity measuring menu (see page 66). The cell constant to be set must either be taken from the operating manual of the measuring cell or is printed on the measuring cell.

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ProLab 2000 Operation

731 μS/cm

24.8 °C

4.7.2 Measuring

You can carry out conductivity measurements as follows:

1 Perform the preparatory activities according to page 62.

2 Immerse the conductivity measuring cell in the test sample.

Selecting the

displayed

measured variable

Stability control The Stability control function checks the stability of the measurement

You can switch between the following displays with <MODE>:

 Conductivity [μS/cm] / [mS/cm]

 Resistivity [Ω·cm] / [MΩ·cm]

 Salinity SaL [ ]

 Total dissolved solids TDS [mg/l]

The factor to calculate the total dissolved solids is set to 1.00 in the factory. You can adjust this factor to meet your requirements in the range of 0.40 to 1.00. The factor can be set in the TDS measuring menu.

signal. The stability has a considerable impact on the reproducibility of measured values. The display of the measured parameter flashes until a stable measured value is available.

Independent of the setting for automatic Stability control (see page 35) in the System menu, you can start the Stability control function manually at any time.

1 If necessary, select a channel (measured value) with <▲><▼>.

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2 Freeze the measured value with <SC>.

The display switches to the display of the selected channel as necessary. In the status line, [SC] is displayed.

Operation ProLab 2000

3 With <MENU/OK> activate the Stability control function.

Note

4 Using <SC> or <MODE>, release the frozen measured value.

The [SC] status display disappears. The display switches to the previous indication.

Criterion The meter checks the stability of the measured value on the basis of

the temperature measurement. For identical measurement conditions, the following applies:

Measured

Reproducibility Response time

parameter

Temperature better than 0.02 °C > 10 seconds

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ProLab 2000 Operation

4.7.3 Temperature compensation

The calculation of the temperature compensation is based on the preset reference temperature, 20 °C or 25 °C. It appears on the display as Tr20 or Tr25.

You can select one of the following temperature compensation methods:

 Nonlinear temperature compensation (nLF) according to EN 27

888

 Linear temperature compensation (lin) with selectable

coefficients of 0.000 ... 3.000 %/K

 No temperature compensation (off)

Note

The reference temperature and temperature compensation are set in the conductivity measuring menu (see page 66).

Application tips Select the following temperature compensations given in the table

according to the respective test sample:

Test sample Temperature

compensation

Natural water (ground water, surface

nLF according to EN 27 888

Display indicator

nLF

water, drinking water)

Ultrapure water nLF

nLF

according to EN 27 888

4.7.4 Settings for conductivity measuring cells

Overview The following settings are possible for conductivity measuring cells:

 Measured parameter

 Reference temperature

 Temperature compensation

 TDS factor

 Calibration interval

 Measuring cell / cell constant

Settings The settings are made in the measuring menu of the conductivity

measurement. To open the settings, activate the relevant measuring window in the measured value display and press the <MENU/OK> key. After completing the settings, switch to the measured value display with

<MODE>.

Menu item Possible

Description

setting

Calibration / Calibration interval

1 ... 999 d Calibration interval for the

measuring cell (in days). The meter reminds you to calibrate regularly by the flashing CalClock in the measuring window.

Calibration / Calibration record

Calibration / Calibration history

- Displays the calibration

record of the last calibration.

- Displays the calibration history of the last calibrations.

Reset - Resets all sensor settings to

the delivery condition (see page 93).

Temp. comp. (TC) / Reference temp.

20°C 25 °C

Reference temperature

This setting is only available when the Conductivity or Resistivity display is set.

Temp. comp. (TC) / Compensation

nLF lin Off

Procedure for temperature compensation (see page 65).

This setting is only available when the Conductivity or Resistivity display is set.

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ProLab 2000 Operation

Menu item Possible

Description

setting

Temp. comp. (TC) / Linear coeff.

0.000 ...

3.000 %/K

Coefficient of the linear temperature compensation.

This setting is only available when the linear temperature compensation is set.

TDS factor 0.40 ... 1.00 TDS factor

This setting is only available when the TDS display is set.

Measuring cell Measuring cell used

Cal Measuring cells the cell

constant of which is determined by calibration in the KCL control standard solution (Calibration ranges see page 68 and page 108). The currently valid cell constant is displayed in the status line.

C0.01 Measuring cell with a nominal

LF313T Measuring cell LF313T(-ID),

man Any measuring cells with

Cell constant 0.090 to

0.110 cm

Man. cell const. 0.250 to

25.000 cm

cell constant of 0.010 cm

-1

. The cell constant is permanently set.

nominal cell constant

-1

0.100 cm

. The cell constant can be adjusted in the range 0.090 to

0.110 cm

-1

freely adjustable cell constants in the range 0.250

-1

to 25.000 cm

Display and setting option for

-1

the cell constant of the measuring cell LF313T(-ID).

Display and setting option of

-1

the cell constant of any measuring cells (man).

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Operation ProLab 2000

4.7.5 Determining the cell constant (calibration in control standard)

Why determine the cell

constant?

CalClock The expiry of the CalClock reminds you to clean the measuring cell. It

Stability control During calibration, the stability control is automatically activated.

Due to aging, the cell constant slightly changes. As a result, an inexact measured value is displayed. Calibration determines the current value of the cell constant and stores this value in the instrument. Therefore, calibrate at regular intervals. The calibration data is stored in the meter. The calibration data of non-ID sensors is stored in the meter. For ID sensors, the calibration data is stored in the sensor.

You can determine the cell constant of the conductivity measuring cell in the ranges 0.450 ... 0.500 cm

1.200 cm

-1

by calibrating in the 0.01 mol/l KCl control standard or set it manually in the range 0.250 ... 2.500 cm Besides, the fixed cell constant 0.010 cm

-1

, 0.585 ... 0.715 cm-1 or 0.800 ...

-1

or 0.090 ... 0.110 cm-1.

-1

can be selected.

In the delivery condition, the calibrated cell constant of the meters is set to 0.475 cm

-1

(conductivity measuring cells LF413T(-ID) and

LFOx1400(-ID).

is still possible to measure. The CalClock is set to 180 days in the factory. You can change the interval (see page 66).

Display of calibration

data and download to

interface

You can have the data of the last calibration displayed (see page 87). Subsequently, you can transmit the displayed calibration data to the interface, e. g. to a PC, with the <PRINT> key.

Note

The calibration record is automatically transmitted to the interface after calibrating.

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ProLab 2000 Operation

Printing date 26.04.06 16:13 ProLab 2000

Ser. no. 06249876 USER ID: 1234567890

Calibration Cond Calibration date 20.04.06 10:14:03 LFOx1400-ID

Ser. no. A062498765 USER ID: 1234567890

Cal interval 150 d Cell constant. 0.475 1/cm 25.0 °C Sensor +++

Sample record:

Note

If non-ID sensors are used, the sensor type and series number are not output in the calibration record.

Calibration evaluation After the calibration, the meter automatically evaluates the current

status of the calibration. The evaluation appears on the display and in the calibration record.

Display Calibration

Cell constant [cm-1]

record

+++ within the ranges

0.450 ... 0.500 cm

0.585 ... 0.715 cm

-1

Error Error

Eliminate the error according to chapter 6 W

HAT TO DO IF...

0.800 ... 1.200 cm

outside the ranges

0.450 ... 0.500 cm or

0.800 ... 1.200 cm

(page 99)

Determining the cell

Proceed as follows to determine the cell constant:

constant

1 Connect a conductivity measuring cell to the meter.

2 In the measured value display, select the conductivity

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measuring window with <▲><▼> and <MODE>.

3 Start the calibration with <CAL>.

The calibration display appears.

Operation ProLab 2000

[i] Cell constant = 0.475 1/cm [i] Immerse sensor in solution

Continue

<CAL>

[i] Cell constant = 0.481 1/cm [i] Temperature =24.8 °C

Terminate stability control

<CAL>

[i] Cell constant = 0.481 1/cm i Sensor+++

<CAL>

4 Immerse the conductivity measuring cell in the control standard

solution, 0.01 mol/l KCI.

5Press <MENU/OK>.

The measurement with stability control to determine the cell constant starts.

6 Wait for the end of the measurement with Stability control or

accept the calibration value with <MENU/OK>. The determined cell constant is displayed as a message (

i).

7 You have the following options:

 Accept the new calibration values with <MENU/OK>.

Subsequently, the calibration record is displayed and downloaded to the interface at the same time.

 To switch to the measured value display without

accepting

the new calibration values, press <MODE> or <ESC>.

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ProLab 2000 Operation

4.8 Dissolved oxygen

4.8.1 General information

You can measure the following variables:

 D.O. concentration

 D.O. saturation index ("D.O. saturation")

 D.O. partial pressure

D.O. measurements with the ProLab 2000 can be carried out using the D.O. sensors, LFOx1400(-ID), 9009/6.(-ID) or Ox1400Stir(-ID). The stirrer of the Ox1400Stir(-ID) D.O. sensor has to be supplied with voltage separately using the NT/pH Mix 540 power supply. The meter automatically recognizes the type of the connected D.O. sensor.

The meter provides the following functions:

 AutoRange (automatic switchover of the measurement range). If a

 Stability control to check the stability of the measurement signal.

This ensures the reproducibility of the measuring signal. The display of the measured parameter flashes until a stable measured value is available.

Note

Incorrect calibration of D.O. sensors will result in incorrect measured values. Calibrate at regular intervals.

CAUTION

When connecting an earthed PC/printer, measurements cannot be performed in earthed media as incorrect values would result. The RS232 and USB interfaces are not galvanically isolated.

Temperature sensor The D.O. sensor has an integrated temperature sensor that always

measures the current temperature of the test sample.

Preparatory activities Perform the following preparatory activities when you want to measure:

1 Connect the D.O. sensor to the meter.

The D.O. measuring window is displayed.

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2 Calibrate or check the meter with the sensor.

Operation ProLab 2000

7.29 mg/l

25.0 °C

26.04.06 10:37

4.8.2 Measuring

1 Perform the preparatory activities according to page 71.

2 Immerse the D.O. sensor in the test sample.

Selecting the

displayed

measured variable

Salinity correction When measuring the concentration of solutions with a salt content of

Stability control The Stability control function checks the stability of the measurement

You can switch between the following displays with <MODE>:

 D.O. concentration [mg/l]

 D.O. saturation [%]

 D.O. partial pressure [mbar].

more than 1 g/l, a salinity correction is required. For this, you have to measure and input the salinity of the measured medium first. When the salinity correction is switched on, the [SAL] indicator is displayed in the measuring window.

Note

The salinity correction is switched on or off and the salinity is entered in the measuring menu of the D.O. measurement (see page 74).

Note

The LFOx1400(-ID) double sensor can perform the salinity correction automatically. The conductivity module of the sensor measures the salt content of the test sample simultaneously with the D.O. The meter takes the measured value into account.

signal. The stability has a considerable impact on the reproducibility of measured values. The display of the measured parameter flashes until a stable measured value is available.

Independent of the setting for automatic Stability control (see page 35) in the System menu, you can start the Stability control function manually at any time.

1 If necessary, select a channel (measured value) with <▲><▼>.

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ProLab 2000 Operation

2 Freeze the measured value with <SC>.

The display switches to the display of the selected channel as necessary. In the status line, [SC] is displayed.

3 With <MENU/OK> activate the Stability control function.

Note

4 Using <SC> or <MODE>, release the frozen measured value.

The [SC] status display disappears. The display switches to the previous indication.

Criteria With identical measurement conditions, the following applies:

Measuring mode Reproducibility Response time

D.O. concentration Better than 0.05 mg/l > 10 seconds

D.O. saturation Better than 0.6 % > 10 seconds

D.O. partial

Better than 1.2 mbar > 10 seconds

pressure

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Operation ProLab 2000

4.8.3Settings for D.O. sensors

Overview The following settings are possible for D.O. sensors:

 Salinity correction

 Salinity (salinity equivalent)

 Calibration interval

 Comparison measurement

Settings The settings are made in the measuring menu of the D.O.

<MODE>.

Menu item Possible

Description

setting

Calibration / Calibration interval

1 ... 999 d Calibration interval for the D.O.

sensor (in days). The meter reminds you to calibrate regularly by the flashing CalClock in the measuring window.

Calibration / Comparison meas.

On Off

Enables to adjust the measured value with the aid of a comparison measurement, e.g. Winkler titration. For details, see page 75.

Calibration / Calibration record

Calibration / Calibration history

- Displays the calibration record of the

last calibration.

- Displays the calibration history of the last calibrations.

Reset - Resets all sensor settings to the

delivery condition (see page 93).

Sal automatic On

Off

Automatic salt content correction for concentration measurements.

Sal correction On

Off

Salinity 0.0 ...

70.0

Note:

This function is available with the LFOx1400(-ID) double sensor only

Manual salt content correction for concentration measurements.

Salinity or salinity equivalent for the salt content correction. This function is only available if the manual salt content correction is switched on.

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ProLab 2000 Operation

4.8.4 D.O. calibration

Why calibrate? D.O. sensors age. This changes the slope of the D.O. sensor.

Calibration determines the current slope of the sensor and stores this value in the instrument.

When to calibrate?  After connecting another non-ID D.O. sensor

 When the CalClock flashes (after the calibration interval has

expired).

Calibration datasets The ProLab 2000 administrates two sets of calibration data:

 Set 1 for the type, "Ox": – 9009/6. or

– Ox1400Stir

 Set 2 for the type,

– LFOx1400

"FOx1400":

Sensors of different types can be calibrated separately from each other. When a sensor of one type is calibrated, the calibration data of the other types remain stored. The ProLab 2000 recognizes the type of the connected sensor and automatically uses the correct calibration data.

Calibration procedures The ProLab 2000 provides 2 calibration procedures:

 Calibration in water vapor-saturated air.

Use an air calibration vessel for calibration.

 Calibration via a comparison measurement (e.g. Winkler titration

according to DIN EN 25813 or ISO 5813). At the same time, the relative slope is adapted to the comparison measurement by a correction factor. When the correction factor is active, the [Factor] indicator appears in the measuring window.

Stability control During calibration, the stability control is automatically activated.

Display of calibration

data and download to

interface

You can have the data of the last calibration displayed (see page 87). Subsequently, you can transmit the displayed calibration data to the interface, e. g. to a printer or PC, with the <PRINT> key.

ba75577e05 11/2013

Note

The calibration record is automatically transmitted to the interface after calibrating.

Operation ProLab 2000

Printing date 26.04.06 16:13 ProLab 2000

Ser. no. 06249876 USER ID: 1234567890

CALIBRATION Oxi Calibration date 20.04.06 10:14:03 LFOx1400-ID

Ser. no.

A062498765

USER ID: 1234567890

Cal. interval 14d Relative slope 0.97

Sensor +++

Sample record:

Note

If non-ID sensors are used, the sensor type and series number are not output in the calibration record.

Calibration evaluation After the calibration, the meter evaluates the current status of the

sensor against the relative slope. The evaluation appears on the display and in the calibration record. The relative slope has no effect on the measuring accuracy. Low values indicate that the electrolyte will soon be depleted and the sensor will have to be regenerated.

Display Calibration record Relative slope

+++ S = 0.8 ... 1.25

++ S = 0.7 ... 0.8

+ S = 0.6 ... 0.7

Error Error

S < 0.6 or S > 1.25

Eliminate the error according to chapter 6 W

HAT TO DO IF... (page 99)

Calibration in

water vapor

saturated air

(air calibration vessel)

For this calibration procedure, the Comparison meas. setting must be set to Off in the measuring menu.

Proceed as follows to calibrate the meter:

Note

The sponge in the air calibration vessel must be moist (not wet). Leave the sensor in the air calibration vessel for a time long enough to adjust.

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ProLab 2000 Operation

[i] Relative slope = 1.00 [i] Use air calibration vessel

Continue

LFOx1400-ID <CAL>

[i] Relative slope = 1.00 [i] Temperature =24.8 °C

Terminate stability control

LFOx1400-ID <CAL>

1 Put the D.O. sensor into the air calibration vessel.

2 Connect the D.O. sensor to the meter.

3 In the measured value display, select the D.O. measuring

window with <▲><▼> and <MODE>.

4 Start the calibration with <CAL>.

The calibration display for the relevant sensor type appears.

5 Put the D.O. sensor into the air calibration vessel.

6Press <MENU/OK>.

The measurement with stability control to determine the relative slope starts.

7 Wait for the end of the measurement with Stability control or

accept the calibration value with <MENU/OK>. The determined relative slope is displayed as a message (

i).

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Operation ProLab 2000

[i] Relative slope = 0.98 i Sensor+++

LFOx1400-ID <CAL>

[i] Immerse sensor in ref. sol.

Continue

LFOx1400-ID <CAL>

8 You have the following options:

 Accept the new calibration values with <MENU/OK>.

Subsequently, the calibration record is displayed and downloaded to the interface at the same time.

Calibration via a

Comparison meas.

 To switch to the measured value display without

accepting

the new calibration values, press <MODE> or <ESC>.

For this calibration procedure, the Comparison meas. setting must be set to On in the measuring menu.

Note

Before calibrating via a comparison measurement, the sensor should be calibrated in the air calibration vessel.

Proceed as follows to calibrate the meter:

1 Connect the D.O. sensor to the meter.

2 Immerse the D.O. sensor in the reference solution.

3 In the measured value display, select the D.O. measuring

window with <▲><▼> and <MODE>.

4 Start the calibration with <CAL>.

The calibration display appears.

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ProLab 2000 Operation

[i] Concentration = 8.5 mg/l [i] Temperature =24.8 °C

Terminate stability control

LFOx1400-ID <CAL>

[i] Concentration = 8.49 mg/l [i] Temperature =24.8 °C

Set factor: 1.000

LFOx1400-ID <CAL>

5 Press <MENU/OK>.

The measurement with stability control to determine the D.O. concentration starts.

6 Wait for the end of the measurement with Stability control or

accept the measured value with <MENU/OK>. The determined D.O. content is displayed as a message (

i).

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7 Open the setting of the correction factor with <MENU/OK>.

8Using <▲><▼>, set the correction factor to adjust the

displayed concentration value to the nominal value (value of the comparison measurement). Subsequently, accept the correction factor with <MENU/OK>.

9 Select Accept with <▲><▼> and press <MENU/OK>.

The meter switches to the measured value display. The [Factor] indicator appears in the measuring window.

Operation ProLab 2000

4.9 Storage

You can transmit measured values (datasets) to the data storage in two ways:

 Manual storage (see page 81)

 Automatic storage at intervals (see page 82)

Each storage process transmits the current dataset to the interface at the same time.

Measurement dataset A complete dataset consists of:

 Date/time

 USER ID

 Meter designation with series number

 SENSOR ID

– Sensor designation

– Sensor series number

 SAMPLE ID

 Measured value of the connected sensor

 Measured temperature value of the connected sensor

 Info on stability control: SC appears with the measured value if the

Stability control criterion was met while storing (stable measured value). Otherwise, there is no SC display.

 Measurement conditions

Storage locations The meter has separate data storages for manually stored measured

values and automatically stored measured values.

Storage Maximum number of datasets

Manual storage 308

Automatic storage 2244

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ProLab 2000 Operation

- 26.04.2006 11:24:16

- pH 7.000 24.8 °C SC

SAMPLE ID:1 Continue

<STO> 1 of 646

Data storage full. Erase?

Yes No

Warning

4.9.1 Manual storage

Proceed as follows to transmit to the data storage and simultaneously download to the interface a measurement dataset:

1 Open the menu for manual storage with <STO>.

2 If necessary, use <▲><▼> and <MENU/OK> to change and

confirm the SAMPLE ID (1 ... 999). The dataset is stored. The meter switches to the measured value display.

If the data storage is full The following window appears if all storage locations are occupied:

You have the following options:

 To erase the entire data storage, confirm Yes.

 To cancel the storage process and switch to the measured value

display, confirm No. Then you can e.g. transmit the stored data to a PC (see page 84) and subsequently erase the storage (see page 87).

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Operation ProLab 2000

SAMPLE ID 1 Interval 30 s Duration 180 min Continue

00d03h00min 00d15h

34min

<STO_>

4.9.2 Automatic storage at intervals

The storage interval (Interval) determines the chronological interval between automatic storage processes. Each storage process transmits the current dataset to the interface at the same time.

Configuring the

automatic storage

function

1 Open the menu for automatic storage with <STO_>.

Settings You can configure the automatic storage function with the following

settings:

Menu item Possible

Description

setting

SAMPLE ID 1 ... 999 Determine the sample

designation for the series of datasets.

Interval 2, 5 s, 10 s,

30 s, 1 min, 5min, 10min, 15 min, 30 min, 60 min

Storage interval.

The lower limit of the storage interval can be restricted by the number of free storage locations. The upper limit is restricted by the storage duration.

Duration 1 min ... x min Storage duration.

Specifies after which time the automatic storage should be terminated.

The lower limit of the storage duration is restricted by the storage interval. The upper limit is restricted by the number of free storage locations.

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ProLab 2000 Operation

SAMPLE ID 1

Interval 30 s Duration 180 min Continue

00d03h00min 00d15h

34min

<STO_>

Adjusted storage duration for the entire dataset series

Maximum usable storage duration

Graphical display of the data storage usage

6.949

24.8 °C

26.04.06 10:37

Data storage

administration

Starting the automatic

storage function

The two lower display lines indicate the use of the data storage calculated in advance for the selected settings:

To start the automatic storage function, select Continue with <▲><▼> and confirm with <MENU/OK>. The meter switches to the measured value display.

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The active automatic storage function can be recognized from the progress bar in the status line. The progress bar indicates how much of the adjusted storage duration has already expired.

Operation ProLab 2000

Stop automatic storage?

Yes No

Warning

Terminating the

automatic storage

function prematurely

Proceed as follows to switch off the automatic storage function before the adjusted storage duration has expired:

1 With <STO_> open the following window.

2 Select and confirm Yes with <▲><▼> and <MENU/OK>.

The meter switches to the measured value display. The automatic storage function is terminated.

4.9.3 Reading the measurement data storage

Editing the

data storage

You can select the contents of the manual or automatic measurement data storage by means of different filter criterions and

 read them out on the display, and

 download them to the interface.

Each measurement data storage has a separate erasure function for the entire contents, independent of the filter settings.

The data storage is edited in the System / Data storage menu. In the measured value display, open the system menu with <MENU/

_>. With the <RCL> or <RCL_> key you can move directly to the

menu for the manual or automatic data storage.

Note

The settings are explained here using the manual storage as an example. The same settings and functions are available for the automatic storage.

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ProLab 2000 Operation

Settings

Menu item Setting/

function

Data storage /

- Displays in pages all

Manual data storage / Display

Data storage /

- Outputs to the interface all

Manual data storage / Output to RS232/USB

Description

measuring datasets that correspond to the filter settings (see menu Data filter).

Further options:  Scroll through the

datasets with <▲><▼>.

 Output the displayed

dataset to the interface with <PRINT>.

 Quit the display with

<ESC>.

measuring datasets that correspond to the filter settings. The download takes place in ascending order of the storage location number. The process can take several minutes. To terminate the process prematurely, press <ESC>.

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Data storage / Manual data storage / Data filter

Data storage / Manual data storage / Erase

-> see explanations below this table, page 86

Allows to set certain filter criteria in order to display datasets and download them to the interface.

- Erases the entire contents of the selected measuring data storage, independent of the filter settings.

Note:

All calibration data remains stored when performing this action.

Operation ProLab 2000

30.04.2006 11:24:16 (1) ProLab 2000: 06249876 USER ID: 1234567890 A 161 1M-BNC-ID: A062498765

SAMPLE ID:1

- pH 7.000 24.8 °C SC

26.04.06 16:13 ProLab 2000

Ser. no. 06249876 USER ID: 1234567890

SAMPLE ID: 1

A 161 1M-BNC-ID Ser. no. A062498765 LFOx1400-ID Ser. no. A062498765 pH 6.87 24.0 °C, SC +++ Oxi 7.76 mg/l 25.0 °C, SC, ++ Sal = 0.7 Cond 1389 uS/cm 25.0 °C, SC, +++ C = 0.958 1/cm, Tref25, nLF ________________________________________

26.04.06 16:03 ProLab 2000

Ser. no.

06249876

USER ID: 1234567890

Data filter

Display presentation

of a dataset

Menu item Setting/

Description

function

Filter Filter criteria:

No filter Data filter switched off

Date & SAMPLE ID

Selection according to period and SAMPLE ID.

SAMPLE ID Selection according to

SAMPLE ID

Date Selection according to

period

From TT.MM.JJ Selects all datasets within

Until TT.MM.JJ

the specified period.

SAMPLE ID 0 ... 999 Selects all datasets with

the specified SAMPLE ID.

Sample printout

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ProLab 2000 Operation

Quitting the display To quit the display of stored measuring datasets, you have the

following options:

 Switch directly to the measured value display with <MODE>.  Quit the display and move to the next higher menu level with <ESC>

or <MENU/OK>.

4.9.4 Erasing the data storage

How to erase the measured value storage is described on page 84.

4.9.5 Displaying and downloading calibration records

You can display and then output to the interface the calibration data.

Note

ID sensors have to be connected to the meter.

Displaying the

calibration record

of a selected sensor

Displaying the

calibration records

of all sensors

The calibration record of the last calibration can be found under the Calibration / Calibration record menu item in the respective measuring menu. To open it, activate the relevant measuring window in the measured value display and press <MENU/OK>.

The calibration records of the last calibration of all sensors can be found under the Data storage / Calibration data storage menu item in the system menu. In the measured value display, open the system menu with <MENU/OK

With the <CAL storage menu.

_> key you can go directly to the Calibration data

_>.

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Operation ProLab 2000

Printing date 26.04.06 16:13 ProLab 2000

Ser. no. 06249876 USER ID: 1234567890

CALIBRATION pH Calibration date 20.04.06 10:14:03

A 161 1M DIN-ID

Ser. no. A062498765 USER ID: 1234567890

Cal. interval 7 d

DIN

Buffer 1 6.86 Buffer 2 9.18 Voltage 1 7.2 mV 26.3 °C Voltage 2 -171 mV 26.3 °C Slope -59.2 mV/pH Zero point -0.5 mV Sensor +++

________________________________________

CALIBRATION ISE Calibration date 20.04.06 10:14:03 Standard 1 0.010 mg/l Standard 2 0.020 mg/l Voltage 1 38.5 mV 25.0 °C Voltage 2 58.0 mV 23.0 °C

Menu item Setting/

function

Data storage /

- Displays the calibration records.

Calibration data storage /Display

Data storage /

- Outputs to the interface the

Calibration data storage / Output to RS232/USB

Description

Further options:  Scroll through the calibration

records with <▲><▼>.

 Output the displayed

calibration record to the interface with <PRINT>.

 Quit the display with <ESC>

or <MENU/OK>.

 Switch directly to the

measured value display with <MODE>.

calibration records.

Sample printout

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ProLab 2000 Operation

4.9.6 Displaying and downloading calibration history

You can display and then output to the interface the calibration data.

Note

ID sensors have to be connected to the meter.

The calibration history of a sensor can be found

 under the Calibration / Calibration history menu item in the

respective measuring menu. To open it, activate the relevant measuring window in the measured value display and press <MENU/OK>.

 under the Data storage / Calibration history menu item in the system

menu. In the measured value display, open the system menu with <MENU/

_>.

Menu item Setting/

function

Data storage / Calibration history / pH ISE Ox Cond Ox (CondOx) Cond (CondOx

- Display Displays the calibration history.

- Output to

RS232/ USB

Description

Further options:  Scroll through the calibration

records with <▲><▼>.

 Quit the display with <ESC>

or <MENU/OK>.

 Switch directly to the

measured value display with <MODE>.

Outputs to the interface the calibration history.

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Operation ProLab 2000

4.10 Transmitting data (to a PC or printer)

The meter has two interfaces:

 RS232 interface (serial port)

 USB interface (device)

Via both interfaces, you can transmit data to a PC and update the meter software.

The RS232 interface enables to transmit data to an external serial printer.

Note

The relevant interface cable has to be connected if you want to download data to an interface (USB or RS232). It is not possible to download data to both interfaces (USB and RS232) at the same time. After connecting a meter to the USB socket the RS232 interface is inactive. The RS232 interface is active if no meter is connected to the USB interface.

CAUTION

The RS232 and USB interfaces are not galvanically separated. When connecting an earthed PC/printer, measurements cannot be performed in earthed media as incorrect values would result.

4.10.1 RS232 interface

1 Connect the interface to the PC or printer via the cable Z390

(PC) or Z393 (ext. printer).

2 If necessary, disconnect a connected USB cable from the

meter.

3 Set up the following transmission data on the PC/printer:

– Baud rate: selectable from 1200, 2400, 4800, 9600,

– Handshake: RTS/CTS + Xon/Xoff

–PC only:

– Parity: none

– Data bits: 8

– Stop bits: 1

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ProLab 2000 Operation

RS 232

1 1 2 RxD 3 TxD 4 1 5 SGnd 6 CTS

1 not used

Socket assignment

(RS232)

4.10.2 USB interface (device)

Connect the interface to the PC via the supplied Z875 USB cable. The data output automatically switches to USB. The RS232 interface is deactivated.

Installation of the USB

driver on the PC

System requirements of the PC for installation of the USB driver:

 PC with Pentium processor or higher with at least one free USB

connection and CD-ROM drive

 Windows 2000, XP, Vista.

1 Insert the supplied installation CD in the CD drive of your PC.

2 Install the USB driver on the PC.

Follow the Windows installation instructions as necessary.

3 Connect the ProLab 2000 to the PC via the USB interface.

The meter is listed as a virtual COM interface among the connections in the Windows instrument manager.

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Operation ProLab 2000

4.10.3 Options for data transmission

Via the RS232 interface, you can transmit data to a PC or external printer. The following table shows which data is transmitted to the interface in which way:

Data Control Operation / description

Current measured values of the connected sensor

Stored measured values

Calibration records

Manual  With <PRINT>.

 Simultaneously with every

manual storage process (see page 81).

automatic, at intervals

Manual  Displayed dataset:

Manual  Calibration record of a

 With <PRT

can set the transmission interval.

 Simultaneously with every

automatic storage process (see page 82).

with <PRINT> after recall from data storage.

 All datasets according to the

filter criteria via the Output to RS232/USB function.

For details, see page 84.

sensor: Calibration record of a sensor with <PRINT> (after calling up from the data storage or at the end of a calibration procedure).

_>. Then you

 All calibration records after

calling up from the data storage via the Output to RS232/USB function.

For details, see page 87.

automatic  For the respective sensor at

the end of a calibration procedure.

Note

The following rule applies: Except for the menus, the display content is generally downloaded to the interface with <PRINT> (displayed measured values, measurement datasets, calibration records).

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ProLab 2000 Operation

4.10.4 Operation with MultiLab pilot

With the aid of the MultiLab pilot software, you can record and evaluate measuring data with a PC. The data is transmitted after the meter was connected to the RS232 serial interface (COM port) or the USB interface of the PC.

Note

More detailed information can be found in the MultiLab pilot operating manual.

4.11 Reset

You can reset (initialize) all sensor settings and sensor-independent settings separately from each other.

4.11.1 Resetting the sensor settings

Note

The calibration data is reset to the default settings together with the measuring parameters. Recalibrate after performing a reset.

pH The following settings for pH measurements are reset to the default

settings with the Reset function:

Setting Default settings

Cal. interval 7 d

Unit for slope mV/pH

Measured parameter pH

High resolution pH On

High resolution mV On

Zero point 0 mV

Slope -59.16 mV

Temperature, manual 25 °C

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The sensor settings are reset under the Reset menu item in the respective measuring menu. To open it, activate the relevant measuring window in the measured value display and press the

<MENU/OK> key.

Operation ProLab 2000

Cond The following settings for conductivity measurements are reset to the

default settings with the Reset function:

Setting Default settings

Cal. interval 150 d

Measured parameter

-1

Cell constant (c) 0.475 cm

0.475 cm

(calibrated)

-1

(set up)

Temperature compensation nLF

Reference temperature 25 °C

Temperature coefficient (TC) of

2.000 %/K the linear temperature compensation

TDS factor 1.00

The sensor settings are reset under the Reset menu item in the respective measuring menu. To open it, activate the relevant measuring window in the measured value display and press the

<MENU/OK> key.

Oxi The following settings for D.O. measurements are reset to the default

settings with the Reset function:

Setting Default settings

Cal. interval 14d

Comparison meas. Off

Measured parameter D.O. concentration

Relative slope (S

)1.00

Rel

Salinity (value) 0.0

Salinity (function) Off

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ProLab 2000 Operation

4.11.2 Resetting the system settings

The following system settings can be reset to the delivery status:

Setting Default settings

Language Deutsch

Temperature unit °C

Beep On

Baud rate 4800 Baud

Output format ASCII

Contrast 40 %

Illumination On

The system settings are reset under the System / Reset menu item in the system menu. In the measured value display, open the system menu with <MENU/OK

_>.

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Operation ProLab 2000

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ProLab 2000 Maintenance, cleaning, disposal

5 Maintenance, cleaning, disposal

5.1 Maintenance

The only maintenance activity required is replacing the batteries.

Note

For maintenance of the measuring cells and electrodes refer to the relevant operating manuals.

Replacing the batteries

1 Using a screw driver, unscrew the screws (2) of the lid of the

battery compartment.

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2 Open the battery compartment (1) on the underside of the

meter.

3 Remove the four batteries from the battery compartment.

4 Place four new batteries (type Micro AAA) in the battery

compartment.

5 Close the battery compartment (1).

The date (day) flashes on the display.

6 Using a screw driver, tighten the screws (2) of the lid of the

battery compartment.

7 Set the date and time (see page 27)

Maintenance, cleaning, disposal ProLab 2000

CAUTION

Make sure that the poles of the batteries are the right way round.

± signs on the batteries must correspond to the ± signs in the

The battery compartment. Only use leakproof alkaline manganese batteries.

5.2 Cleaning

Occasionally wipe the outside of the meter with a damp, lint-free cloth. Disinfect the housing with isopropanol as required.

CAUTION

The housing components are made out of synthetic materials (polyurethane, ABS, PMMA), metal and glass. Thus, avoid contact of the synthetic material with acetone and similar detergents that contain solvents. Remove any splashes immediately.

5.3 Disposal

Note

This instrument contains batteries. Batteries that have been removed must only be disposed of at the recycling facility set up for this purpose or via the retail outlet. It is illegal to dispose of the instrument in household refuse.

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ProLab 2000 What to do if...

6 What to do if...

6.1 pH and ORP measurement

Error message

Err1

Error message

Err2

Cause Remedy

pH electrode:

– Measured value outside the

measuring range

– Air bubble in front of the

junction

– Air in the junction – Extract air or moisten

– Cable broken – Replace electrode

– Gel electrolyte dried out – Replace electrode

Cause Remedy

– No electrode connected – Connect electrode

– Setting time during calibration

too long

– Use a suitable electrode

– Remove air bubble

junction

– Adjust temperature if

necessary

– Recalibrate

Error message

CalError

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Err4

Cause Remedy

– Temperature not stable during

calibration.

Cause Remedy

pH electrode:

– The values determined for zero

point and slope of the electrode are outside the allowed limits.

– Junction contaminated – Clean junction

– Electrode broken – Replace electrode

– Adjust temperature if

necessary

– Recalibrate

What to do if... ProLab 2000

Cause Remedy

Buffer solutions:

– Incorrect buffer solutions –

– Change buffer solutions

– Buffer solutions too old – Use only once.

Note the shelf life

– Buffer solutions depleted – Change buffer solutions

No stable measured

Cause Remedy

value

pH electrode:

– Junction contaminated – Clean junction

– Membrane contaminated – Clean membrane

Obviously incorrect

measured values

Test sample:

– pH value not stable – Measure with air excluded if

necessary

– Temperature not stable – Adjust temperature if

necessary

Electrode + test sample:

– Conductivity too low – Use a suitable electrode

– Temperature too high – Use a suitable electrode

– Organic liquids – Use a suitable electrode

Cause Remedy

pH electrode:

– Not connected – Connect electrode

– Cable broken – Replace electrode

– pH electrode unsuitable – Use a suitable electrode

100

– Temperature difference

between buffer and test sample too high

– Adjust temperature of buffer

or sample solutions

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Xylem ProLab 2000 User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual

Contents

1Overview

1.1 General features

1.2 Keypad

1.3 Display

1.4 Socket field

1.5 Automatic sensor recognition

1.6 Electronic access control

2 Safety

2.1 Authorized use

2.2 General safety instructions

3 Commissioning

3.1 Scope of delivery

3.2 Power supply

3.3 Initial commissioning

4 Operation

4.1 Switch the meter on and off

4.2 General operating principles

4.2.1 Operating modes

4.2.2 Navigation

4.2.3 Navigation example 1: Setting the language

4.2.4 Navigation example 2: Setting the date and time

4.3 Access control

4.3.1 Administrating access authorizations

4.3.2 Lost your electronic key?

4.3.3 Lock

4.4 System settings (system menu)

4.4.1 Data storage

4.4.2 Display

4.4.3 System

4.4.4 Automatic Stability control

4.5 pH value / ORP voltage

4.5.1 General information

4.5.2 Measuring the pH value

4.5.3 Measuring the ORP

4.5.4 Settings for pH and ORP measurements

4.5.5 pH calibration

4.5.6 Calibration interval

4.5.7 Calibrating

4.6 Ion concentration

4.6.1 General information

4.6.2 Measuring the ion concentration

4.6.3Settings for ISE measurements

4.6.4 Calibrating for ISE measurements

4.7 Conductivity

4.7.1 General information

4.7.2 Measuring

4.7.3 Temperature compensation

4.7.4 Settings for conductivity measuring cells

4.7.5 Determining the cell constant (calibration in control standard)

4.8 Dissolved oxygen

4.8.1 General information

4.8.2 Measuring

4.8.3Settings for D.O. sensors

4.8.4 D.O. calibration

4.9 Storage

4.9.1 Manual storage

4.9.2 Automatic storage at intervals

4.9.3 Reading the measurement data storage

4.9.4 Erasing the data storage

4.9.5 Displaying and downloading calibration records

4.9.6 Displaying and downloading calibration history

4.10 Transmitting data (to a PC or printer)

4.10.1 RS232 interface

4.10.2 USB interface (device)

4.10.3 Options for data transmission

4.10.4 Operation with MultiLab pilot

4.11 Reset

4.11.1 Resetting the sensor settings

4.11.2 Resetting the system settings

5 Maintenance, cleaning, disposal

5.1 Maintenance

5.2 Cleaning

5.3 Disposal

6 What to do if...

6.1 pH and ORP measurement