Xylem Lab 850 User Manual

Lab 850

Operating manual

Lab 850

Laboratory pH meter

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DRAFT:February 6, 2006

Lab 850

Accuracy when

going to press

Warranty We guarantee the instrument described for 3 years from the date of

The use of advanced technology and the high quality standard of our instruments are the result of continuous development. This may result in differences between this operating manual and your instrument. Also, we cannot guarantee that there are absolutely no errors in this manual. Therefore, we are sure you will understand that we cannot accept any legal claims resulting from the data, figures or descriptions.

purchase. The instrument warranty covers manufacturing faults that are discovered within the warranty period. The warranty does not cover components that are replaced during maintenance work, e. g. batteries.

The warranty claim extends to restoring the instrument to readiness for use but not, however, to any further claim for damages. Improper handling or unauthorized opening of the instrument invalidates any warranty claim.

To ascertain the warranty liability, return the instrument and proof of purchase together with the date of purchase freight paid or prepaid.

Reprinting - even in the form of excerpts - is only allowed with the explicit written authorization of SCHOTT Instruments. Printed in Germany.

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Lab 850

KONFORMITÄTSERKLÄRUNG DECLARATION OF CONFORMITY DÉCLARATION DE CONFORMITÉ

Wir erklären in alleiniger

Verantwortung, dass das

Produkt

pH-Meter

Lab 850

auf das sich diese Erklärung

bezieht, übereinstimmt mit

den Angaben im Kapitel

We declare under our sole

responsibility that the

product

pH meter

Lab 850

to which this declaration

relates is in conformity with

the specifications in the

chapter

Technische Daten

pH-Meter

30. Oktober 2005

Lab 850

Nous déclarons sous notre seule responsabilité que le

produit

pH-mètre

Lab 850

auquel se réfère cette

déclaration est conforme aux

indications du chapitre

30. Oktober, October 30, 30 octobre 2005 AGQSF 0000-A100-00/051030

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SCHOTT Instruments GmbH

Hattenbergstr. 10

D-55122 Mainz

Deutschland, Germany, Allemagne

Lab 850

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Lab 850 Contents

Lab 850 - Contents

1 Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

1.1 Keypad . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

1.2 Display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

1.3 Socket field . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

2 Safety . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

2.1 Authorized use . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

2.2 General safety instructions . . . . . . . . . . . . . . . . . . . . . . . 12

3 Commissioning. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

3.1 Scope of delivery. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

3.2 Initial commissioning . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

3.2.1 Z865 stand (S4D). . . . . . . . . . . . . . . . . . . . . . . . 16

4 Operation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

4.1 Switching on the meter . . . . . . . . . . . . . . . . . . . . . . . . . . 17

4.2 General operating principles . . . . . . . . . . . . . . . . . . . . . . 18

4.2.1 Operating modes . . . . . . . . . . . . . . . . . . . . . . . . 18

4.2.2 Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

4.3 Measuring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

4.3.1 Measuring the pH value . . . . . . . . . . . . . . . . . . . 20

4.3.2 Measuring the ORP . . . . . . . . . . . . . . . . . . . . . . 21

4.4 Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

4.4.1 Calibration interval (Int.C) . . . . . . . . . . . . . . . . . 26

4.4.2 Automatic calibration (AutoCal) . . . . . . . . . . . . . 27

4.4.3 Downloading calibration data . . . . . . . . . . . . . . . 30

4.5 Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

4.5.1 System settings . . . . . . . . . . . . . . . . . . . . . . . . . 32

4.5.2 Measurement settings . . . . . . . . . . . . . . . . . . . . 34

4.6 Reset. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38

4.6.1 Resetting calibration values . . . . . . . . . . . . . . . . 38

4.6.2 Resetting all meter settings . . . . . . . . . . . . . . . . 39

5 Maintenance, cleaning, disposal. . . . . . . . . . . . . . . . . 41

5.1 Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41

5.1.1 Replacing the batteries . . . . . . . . . . . . . . . . . . . 41

5.2 Cleaning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42

5.3 Packing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42

5.4 Disposal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42

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Contents Lab 850

6 What to do if... . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43

7 Technical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47

7.1 General data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47

7.2 Measuring ranges, resolution, accuracy . . . . . . . . . . . . . 49

8 Lists . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51

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Lab 850 Overview

1Overview

The compact Lab 850 precision pH meter enables you to perform pH measurements rapidly and reliably. The Lab 850 provides the maximum degree of operating comfort, reliability and measuring certainty for all applications. The proven calibration procedures and special stability control function (SC) support your work with the pH meter.

1 Keypad

2 Display

3 Socket field

Note

The meter is also available as part of individual Sets of equipment. You will find information on this and other accessories in the SCHOTT Instruments laboratory catalog or via the Internet.

Note

If you need further information or application notes, you can obtain the following material from SCHOTT Instruments:

! Application reports

! pH primers

! Safety datasheets.

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Overview Lab 850

1.1 Keypad

In this operating manual, keys are indicated by brackets <..> . The key symbol (e.g. <OK>) indicates a keystroke in this operating manual.

MODE

CAL

<On/Off>: <On/Off

<MODE>: <MODE

<CAL>: <CAL

<SC>: Activate / deactivate stability control

<▲>: Increment values, scroll

<▼>: Decrement values, scroll

_>:

Switch meter on / off Reset calibration values

Select measured parameter Open setting menu for calibration and measurement

Call up calibration procedure Display calibration data

<OK>:

_>:

<OK

Confirm entries Open setting menu for system settings

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Lab 850 Overview

1.2 Display

Status display indicator

CalClock (calibration interval and sensor evaluation)

Measured value display

Function and temperature display indicator

Time

Day.Month

Year

LoBat

SET

AutoCal

U pH

Baud

No.

Ident

Auto

BUFFER

Store

CalError

% mV/pH

°F

RCL

Function display

indicators

SET During calibration: number of the buffer set

BUFFER During calibration: number of the buffer

AutoCal Calibration with automatic buffer recognition

CalError An error occurred during calibration

LoBat With battery operation: batteries almost empty

SC Stability control is active

TP Temperature measurement active

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Overview Lab 850

1.3 Socket field

Connectors:

1 pH electrode

2 Reference electrode

3 Temperature sensor

4 Power pack

5 Service interface

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). Almost all sensors - in particular SCHOTT Instruments sensors fulfill these conditions.

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Lab 850 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 meter. The operating manual must always be available within the vicinity of the instrument.

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 Safety instructions in this operating manual are indicated by the

warning symbol (triangle) in the left column. The signal word (e.g. "Caution") indicates the level of danger:

Further notes

Warning

indicates instructions that must be followed precisely in order to avoid possibly great dangers to personnel.

Caution

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

Note

indicates notes that draw your attention to special features.

Note

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

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Safety Lab 850

2.1 Authorized use

This meter is authorized exclusively for pH and ORP measurements in the laboratory. The technical specifications as given in chapter 7 T

ECHNICAL DATA

(page 47) 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.

2.2 General safety instructions

This instrument is constructed and tested in compliance with the IEC 1010 safety regulations for electronic measuring instruments. 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 47).

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

Caution

The meter is only allowed to be opened by personnel authorized by SCHOTT Instruments.

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Lab 850 Safety

Safe operation If safe operation is no longer possible, the instrument 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

! is visibly damaged

! no longer operates as described in this manual.

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

Obligations of the

purchaser

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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Safety Lab 850

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Lab 850 Commissioning

3 Commissioning

3.1 Scope of delivery

! Lab 850 laboratory meter

! Power pack

! 4 batteries 1.5 V Mignon type AA

! Transparent cover

! Stand with stand base (S4D)

! Operating manual

! CD-ROM

3.2 Initial commissioning

Switching on the meter

Setting the date and

time

Connecting the power

pack

Perform the following activities:

! Switch on the meter

! Set the date and time

! Connect the power pack (for line power operation only).

1 Switch on the meter with <On/Off>.

A display test is briefly displayed.

2 See page 32.

Caution

The line voltage at the operating site must lie within the input voltage range of the original power pack (see page 47).

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Caution

Use original power packs only (see page 47).

3 Insert the plug into the socket of the pH meter.

4 Connect the original power pack to an easily accessible power

outlet.

Commissioning Lab 850

Note

You can carry out measurements without the power pack.

3.2.1 Z865 stand (S4D)

The meter can be inserted in the stand base on the right or left side of the electrode holder.

1 Insert the stand rod in the stand base.

2 Insert the meter in the stand base.

An arrangement of meter with stand looks, for example, as follows:

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Lab 850 Operation

4 Operation

4.1 Switching on the meter

1 Place the meter on a flat surface and protect it from intense

light and heat.

2 Press the <On/Off>

A display test is briefly displayed. Subsequently, the meter switches to the measuring mode (measured value display).

Note

The meter has an energy saving feature to avoid unnecessary battery depletion during battery operation. The energy saving feature switches off the meter if no key was pressed during the specified interval (setting the switch-off interval, see page 32).

key.

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Operation Lab 850

4.2 General operating principles

This section contains basic information on the operation of the Lab 850.

4.2.1 Operating modes

The instrument has the following operating modes:

! Measurement

The display indicates the measurement data in the measured value display

! Calibration

The display guides you thru a calibration procedure with calibration information

! Configuration

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

4.2.2 Operation

Keys The meter is operated via keys. The keys can have different functions

with long or short keystrokes.

Functions Generally, with a short keystroke a function is carried out. A long

keystroke opens a setting menu.

In a setting menu, settings are selected with the <▲><▼> keys. A setting is confirmed with <OK>. With confirming, the setting is finished and the next setting is displayed.

Representation In this operating manual, keys are indicated by brackets <..> .

The key symbol (e.g. <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.

<OK

_>).

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Lab 850 Operation

4.3 Measuring

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

1 Connect an electrode to the meter.

2 Adjust the temperature of the buffer solutions or test solutions,

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

3 Calibrate or check the meter with the electrode.

4 Select the measured parameter with <MODE>.

Note

Incorrect calibration of pH electrodes leads to 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 interface is not galvanically isolated.

Temperature sensor You can measure with or without a temperature sensor. If a

temperature sensor is connected, it is indicated on the display by TP.

Note

The pH meter automatically recognizes the type of the temperature sensor used. Therefore, you can connect electrodes with an NTC30 or Pt1000.

The temperature measurement is absolutely essential for a reproducible pH measurement. If the measurement is made without a temperature sensor, proceed as follows:

1 Measure the current temperature using a thermometer.

2 Set the temperature value with <▲><▼>.

Note

When calibrating without temperature sensor, also set the current temperature of each buffer solution manually (see <▲><▼>).

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