Xylem SI Analytics Lab 955 Manual de usuario

OPERATING MANUAL

ba77144e02 12/2017

Lab 955

CONDUCTIVITY METER

ENTER

Lab 955

2ba77144e02 12/2017

Lab 955

Printed in Germany.

For the most recent version of the manual, please visit

www.si-analytics.com.

Lab 955 - Contents

Lab 955 Contents

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

1.1 Lab 955 meter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

1.2 Sensors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

2 Safety. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

2.1 Safety information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

2.1.1 Safety information in the operating manual. . . . . . . . . . . . . . . . 8

2.1.2 Safety signs on the meter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

2.1.3 Further documents providing safety information . . . . . . . . . . . . 8

2.2 Safe operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

2.2.1 Authorized use . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

2.2.2 Requirements for safe operation. . . . . . . . . . . . . . . . . . . . . . . . 9

2.2.3 Unauthorized use . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

3 Commissioning. . . . . . . . . . . . . . . . . . . . . . . . . . . 10

3.1 Scope of delivery . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

3.2 Power supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

3.3 Initial commissioning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

3.3.1 Inserting the batteries . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

3.3.2 Connecting the power pack. . . . . . . . . . . . . . . . . . . . . . . . . . . 11

3.3.3 Mounting the stand . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

4 Operation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

4.1 General operating principles . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

4.1.1 Keypad . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

4.1.2 Display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

Contents Lab 955

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4.1.3 Status information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

4.1.4 Socket field . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

4.2 Switching on the meter. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

4.3 Switching off the meter. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

4.4 Navigation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

4.4.1 Operating modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

4.4.2 Measuring mode (measured value display) . . . . . . . . . . . . . . 16

4.4.3 Setting mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

5 Conductivity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

5.1 Measuring. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

5.1.1 Measuring the conductivity . . . . . . . . . . . . . . . . . . . . . . . . . . 17

5.1.2 Measuring the temperature . . . . . . . . . . . . . . . . . . . . . . . . . . 18

5.2 Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

5.2.1 Why calibrate? . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

5.2.2 When to calibrate? . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

5.2.3 Determining the cell constant (calibration in control standard) 19

5.2.4 Using the last calibrated cell constant . . . . . . . . . . . . . . . . . . 20

5.2.5 Setting the cell constant manually . . . . . . . . . . . . . . . . . . . . . 21

5.2.6 Calibration data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

6 Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

6.1 Measurement settings (conductivity) . . . . . . . . . . . . . . . . . . . . . . . 24

6.1.1 Changing the settings for conductivity measurements . . . . . 24

6.1.2 Cleaning interval . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

6.1.3 Selecting the temperature compensation . . . . . . . . . . . . . . . 25

6.1.4 Setting the TDS factor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26

6.2 Sensor-independent settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

6.2.1 Changing the sensor-independent settings . . . . . . . . . . . . . . 27

6.2.2 Energy saving (battery operation) . . . . . . . . . . . . . . . . . . . . . 27

7 Reset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28

7.1 Erasing the calibration values . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28

7.2 Resetting the measurement and system settings . . . . . . . . . . . . . 28

Lab 955 Contents

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8 Maintenance, cleaning, disposal . . . . . . . . . . . . . 30

8.1 Maintenance. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

8.1.1 General maintenance activities . . . . . . . . . . . . . . . . . . . . . . . 30

8.1.2 Replacing the batteries . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

8.2 Cleaning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

8.3 Packing. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

8.4 Disposal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

9 What to do if... . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32

9.1 Conductivity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32

9.1.1 Error message E3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32

9.1.2 Error message OFL, UFL. . . . . . . . . . . . . . . . . . . . . . . . . . . . 32

9.2 General information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32

9.2.1 [LoBat] Display. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32

9.2.2 Instrument does not react to keystroke . . . . . . . . . . . . . . . . . 33

9.2.3 Displaying the software version (meter). . . . . . . . . . . . . . . . . 33

10 Technical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34

10.1 Measuring ranges, resolution, accuracy. . . . . . . . . . . . . . . . . . . . . 34

10.1.1 Measuring ranges, resolution. . . . . . . . . . . . . . . . . . . . . . . . . 34

10.1.2 Cell constants . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35

10.1.3 Reference temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35

10.1.4 Accuracy (± 1 digit) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35

10.2 General data. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36

11 Glossary. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38

11.1 Conductivity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38

11.2 General information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39

12 Index. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41

Contents Lab 955

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Lab 955 Overview

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1 Overview

1.1 Lab 955 meter

The Lab 955 compact digital precision meter enables you to perform conduc-

tivity measurements quickly and reliably.

The Lab 955 provides the maximum degree of operating comfort, reliability and

measuring certainty for all applications.

1.2 Sensors

A measuring system ready to measure consists of the Lab 955 meter and a

suitable sensor.

Suitable sensors are conductivity measuring cells.

1 Keypad

2 Display

3 Socket field

ENTER

M CAL

Lab 955

Safety Lab 955

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2 Safety

2.1 Safety information

2.1.1 Safety information in the operating manual

This operating manual provides important information on the safe operation of

the meter. Read this operating manual thoroughly and make yourself familiar

with the meter before putting it into operation or working with it. The operating

manual must be kept in the vicinity of the meter so you can always find the infor-

mation you need.

Important safety instructions are highlighted in this operating manual. They are

indicated by the warning symbol (triangle) in the left column. The signal word

(e.g. "CAUTION") indicates the level of danger:

NOTE

indicates a possibly dangerous situation where goods might be damaged

if the actions mentioned are not taken.

2.1.2 Safety signs on the meter

Note all labels, information signs and safety symbols on the meter and in the

battery compartment. A warning symbol (triangle) without text refers to safety

information in this operating manual.

2.1.3 Further documents providing safety information

The following documents provide additional information, which you should

observe for your safety when working with the measuring system:

• Operating manuals of sensors and other accessories

• Safety datasheets of calibration or maintenance accessories (such as buffer

solutions, electrolyte solutions, etc.)

WARNING

indicates a possibly dangerous situation that can lead to

serious (irreversible) injury or death if the safety instruction is

not followed.

CAUTION

indicates a possibly dangerous situation that can lead to

slight (reversible) injury if the safety instruction is not

followed.

Lab 955 Safety

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2.2 Safe operation

2.2.1 Authorized use

This meter is authorized exclusively for conductivity measurements in the labo-

ratory.

Only the operation and running of the meter according to the instructions and

technical specifications given in this operating manual is authorized (see

section 10 TECHNICAL DATA, page 34).

Any other use is considered unauthorized.

2.2.2 Requirements for safe operation

Note the following points for safe operation:

• The meter may only be operated according to the authorized use specified

above.

• The meter may only be supplied with power by the energy sources

mentioned in this operating manual.

• The meter may only be operated under the environmental conditions

mentioned in this operating manual.

• The meter may only be opened if this is explicitly described in this operating

manual (example: Inserting the batteries).

2.2.3 Unauthorized use

The meter must not be put into operation if:

• it is visibly damaged (e.g. after being transported)

• it was stored under adverse conditions for a lengthy period of time (storing

conditions, see section 10 TECHNICAL DATA, page 34).

Commissioning Lab 955

10 ba77144e02 12/2017

3 Commissioning

3.1 Scope of delivery

• Lab 955 meter

• 4 batteries 1.5 V Mignon type AA

• Power pack

• Stand

• Stand holder

• Short instructions

• Detailed operating manual (4 languages)

• CD-ROM with detailed operating manual

3.2 Power supply

The Lab 955 is supplied with power in the following ways:

• Mains operation with the supplied power pack.

• Battery operation (4 x alkaline manganese batteries, type AA)

3.3 Initial commissioning

Perform the following activities:

• Insert the supplied batteries

• Connect the power pack (mains operation)

• Mount the stand

• Switch on the meter

(see section 4.2 SWITCHING ON THE METER, page 15)

3.3.1 Inserting the batteries

You can operate the meter either with normal batteries or with

rechargeable batteries (Ni-MH).

In order to charge the batteries, an external charging device is

required.

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