YSI 1320P User Manual

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OPERATIONS MANUAL

pH/ISE 1320P

pH/ISE 1320

rmodul

/IS

20P

/IS

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TruLab pH/ISE 1320(P)

PH/ISE METER

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TruLab pH/ISE 1320

For the most recent version of the manual, please visit www.ysi.com.

Contact YSI

1725 Brannum Lane Yellow Springs, OH 45387 USA Tel: +1 937-767-7241

800-765-4974 Email: environmental@ysi.com Internet: www.ysi.com

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TruLab pH/ISE 1320 Contents

TruLab pH/ISE 1320 - Contents

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

1.1 TruLab pH/ISE 1320 meter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

1.2 TruLab pH/ISE 1320P meter. . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

1.3 Sensors. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

2 Safety . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

2.1 Safety information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

2.1.1 Safety information in the operating manual . . . . . . . . . . . . 9

2.1.2 Safety signs on the meter . . . . . . . . . . . . . . . . . . . . . . . . . 9

2.1.3 Further documents providing safety information . . . . . . . . 9

2.2 Safe operation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

2.2.1 Authorized use. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

2.2.2 Requirements for safe operation . . . . . . . . . . . . . . . . . . . 10

2.2.3 Unauthorized use. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

3 Commissioning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

3.1 Scope of delivery . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

3.2 Power supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

3.3 Initial commissioning. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

3.3.1 Inserting the batteries . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

3.3.2 Connecting the power pack . . . . . . . . . . . . . . . . . . . . . . . 13

3.3.3 Mounting the stand . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

4 Printer (only TruLab pH/ISE 1320 P) . . . . . . . . . . . . . . . . . . 14

4.1 Commissioning / switching the printer on or off . . . . . . . . . . . . 14

4.2 Operation / printing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

4.3 Printer settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

4.4 Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

4.4.1 Changing the roll of paper (thermal paper) . . . . . . . . . . . 15

4.5 What to do if... / printer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

5 Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

5.1 General operating principles . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

5.1.1 Keypad. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

5.1.2 Display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

5.1.3 Status information (meter) . . . . . . . . . . . . . . . . . . . . . . . . 18

5.1.4 Socket field . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

5.2 Switching on the meter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

5.3 Switching off . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

5.4 Navigation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

5.4.1 Operating modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

5.4.2 Measured value display. . . . . . . . . . . . . . . . . . . . . . . . . . 21

5.4.3 Menus and dialogs. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

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5.4.4 Elements in menus and dialogs . . . . . . . . . . . . . . . . . . . 21

5.4.5 Example 1 on navigation: Setting the language . . . . . . . 23

5.4.6 Example 2 on navigation: Setting the date and time . . . 25

5.5 Channel display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

5.5.1 Display of several sensors in the measuring mode 27

6 pH value. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28

6.1 Measuring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28

6.1.1 Measuring the pH value . . . . . . . . . . . . . . . . . . . . . . . . . 28

6.1.2 Measuring the temperature . . . . . . . . . . . . . . . . . . . . . . 30

6.2 Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

6.2.1 Why calibrate? . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

6.2.2 When do you have to calibrate?. . . . . . . . . . . . . . . . . . . 31

6.2.3 Automatic calibration (AutoCal) . . . . . . . . . . . . . . . . . . . 31

6.2.4 Manual calibration (ConCal) . . . . . . . . . . . . . . . . . . . . . . 34

6.2.5 Calibration points . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37

6.2.6 Calibration data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38

6.2.7 Continuous measurement control (CMC function) . . 40

7 ORP voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41

7.1 Measuring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41

7.1.1 Measuring the ORP . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41

7.1.2 Measuring the relative ORP . . . . . . . . . . . . . . . . . . . . . . 43

7.1.3 Measuring the temperature . . . . . . . . . . . . . . . . . . . . . . 44

7.2 ORP calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44

8 Ion concentration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45

8.1 Measuring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45

8.1.1 Measuring the ion concentration . . . . . . . . . . . . . . . . . . 45

8.1.2 Measuring the temperature . . . . . . . . . . . . . . . . . . . . . . 47

8.2 Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48

8.2.1 Why calibrate? . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48

8.2.2 When to calibrate? . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48

8.2.3 Calibration (ISE Cal). . . . . . . . . . . . . . . . . . . . . . . . . . . . 48

8.2.4 Calibration standards . . . . . . . . . . . . . . . . . . . . . . . . . . . 51

8.2.5 Calibration data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51

8.3 Selecting the measuring method . . . . . . . . . . . . . . . . . . . . . . . 53

8.3.1 Standard addition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54

8.3.2 Standard subtraction . . . . . . . . . . . . . . . . . . . . . . . . . . . 56

8.3.3 Sample addition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59

8.3.4 Sample subtraction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61

8.3.5 Standard addition with blank value correction (Blank value

addition) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63

9 Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66

9.1 Measurement settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66

9.1.1 Settings for pH measurements . . . . . . . . . . . . . . . . . . . . 66

9.1.2 Buffer sets for calibration . . . . . . . . . . . . . . . . . . . . . . . . 68

9.1.3 Calibration interval . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71

9.1.4 Settings for ORP measurements . . . . . . . . . . . . . . . . . . 72

9.2 Settings for ISE measurements . . . . . . . . . . . . . . . . . . . . . . . . 73

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TruLab pH/ISE 1320 Contents

9.3 Sensor-independent settings . . . . . . . . . . . . . . . . . . . . . . . . . . 75

9.3.1 System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75

9.3.2 Data storage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 76

9.4 Reset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 76

9.4.1 Resetting the measurement settings . . . . . . . . . . . . . . . 76

9.4.2 Resetting the system settings. . . . . . . . . . . . . . . . . . . . . 77

10 Data storage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 78

10.1 Manual data storage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 78

10.2 Automatic data storage at intervals . . . . . . . . . . . . . . . . . . 79

10.3 Measurement data storage . . . . . . . . . . . . . . . . . . . . . . . . . . . 81

10.3.1 Editing the measurement data storage. . . . . . . . . . . . . . 81

10.3.2 Erasing the measurement data storage . . . . . . . . . . . . . 83

10.3.3 Measurement dataset. . . . . . . . . . . . . . . . . . . . . . . . . . . 83

10.3.4 Storage locations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 83

11 Transmitting data (USB interface). . . . . . . . . . . . . . . . . . . . . 84

11.1 Options for data transmission . . . . . . . . . . . . . . . . . . . . . . . . . 84

11.2 Connecting a PC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 85

11.3 MultiLab Importer. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 85

12 Maintenance, cleaning, disposal. . . . . . . . . . . . . . . . . . . . . . 87

12.1 Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 87

12.1.1 General maintenance activities . . . . . . . . . . . . . . . . . . . 87

12.1.2 Replacing the batteries. . . . . . . . . . . . . . . . . . . . . . . . . . 87

12.2 Cleaning. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 88

12.3 Packing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 88

12.4 Disposal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 88

13 What to do if.... . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 89

13.1 pH/ORP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 89

13.2 ISE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 91

13.3 General information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 93

14 Technical data. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 94

14.1 Measuring ranges, resolution, accuracy . . . . . . . . . . . . . . . . . 94

14.1.1 pH/ORP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 94

14.1.2 ISE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 95

14.2 General data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 96

15 Firmware update . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 98

16 Glossary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 99

17 Index . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 101

18 Contact Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 103

18.1 Ordering & Technical Support . . . . . . . . . . . . . . . . . . . . . . . . 103

18.2 Service Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 103

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Contents TruLab pH/ISE 1320

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TruLab pH/ISE 1320 Overview

pH 1310

1 Overview

1.1 TruLab pH/ISE 1320 meter

The compact precision pH meter TruLab pH/ISE 1320 enables you to carry out pH measurements, ORP measurements and ion selective measurements quickly and reliably.

The TruLab pH/ISE 1320 provides the maximum degree of operating comfort, reliability and measuring certainty for all applications.

The USB interface can be used for data transmission to a PC and for software updates of the meter.

1 Keypad

2 Display

3 Socket field

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Overview TruLab pH/ISE 1320

modul

pH 1310P

1.2 TruLab pH/ISE 1320P meter

The integrated printer of the TruLab pH/ISE 1320 P enables to document measurements according to GLP requirements.

The information concerning the printer of the TruLab pH/ISE 1320 P is given in a separate chapter (see TRULAB PH/ISE 1320 P), page 14).

section 4 PRINTER (ONLY

1 Keypad

2 Display

3 Socket field

4Printer

5 Control panel of the printer

1.3 Sensors

A measuring system ready to measure consists of the TruLab pH/ISE 1320 meter and a suitable sensor.

Suitable sensors are pH electrodes, ORP electrodes and ion selective electrodes (ISE).

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TruLab pH/ISE 1320 Safety

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:

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 fol lowed.

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.)

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Safety TruLab pH/ISE 1320

2.2 Safe operation

2.2.1 Authorized use

This meter is authorized exclusively for pH, ORP and ISE concentrations measurements in the laboratory.

Only the operation and running of the meter according to the instructions and technical specifications given in this operating manual is authorized (see section 14 TECHNICAL DATA, page 94).

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 14 TECHNICAL DATA, page 94).

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TruLab pH/ISE 1320 Commissioning

3 Commissioning

3.1 Scope of delivery

 pH meter TruLab pH/ISE 1320

 4 batteries 1.5 V Mignon type AA

 Power pack

 USB cable (A plug on mini B plug)

 Stand

 Stand holder

 Comprehensive operating manual

 Short instructions

 CD-ROM with

– USB drivers

– detailed operating manual

– Software MultiLab Importer

3.2 Power supply

The TruLab pH/ISE 1320 is supplied with power in the following ways:

 Mains operation with the supplied power pack

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

 USB operation via a connected USB-B cable

3.3 Initial commissioning

Perform the following activities:

 Insert the supplied batteries

 For mains operation: Connect the power pack

 If necessary, mount a stand

 Switch on the meter

(see section 5.2 SWITCHING ON THE METER, page 19)

 Set the date and time

(see section 5.4.6 EXAMPLE 2 ON NAVIGATION: SETTING THE DATE AND TIME, page 25)

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Commissioning TruLab pH/ISE 1320

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.

1 Battery compartment

1. Open the battery compartment (1) on the underside of the meter.

CAUTION

Make sure that the poles of the batteries are positioned correctly. The ± signs on the batteries must correspond to the ± signs in the battery compartment.

2. Place four batteries (type Mignon AA) in the battery compartment.

3. Close the battery compartment (1).

4. Set the date and time

(see section 5.4.6 EXAMPLE 2 ON NAVIGATION: SETTING THE DATE AND

TIME, page 25).

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TruLab pH/ISE 1320 Commissioning

3.3.2 Connecting the power pack

CAUTION

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

NICAL DATA, page 94).

section 14 TECH-

CAUTION

Use original power packs only (see section 14 TECHNICAL DATA, page 94).

1. Connect the plug of the power pack to the socket for the power pack on

the TruLab

2. Connect the original power pack to an easily accessible power outlet.

pH/ISE 1320.

3.3.3 Mounting the stand

The stand base can be mounted at the right side of the meter.

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Printer (only TruLab pH/ISE 1320 P) TruLab pH/ISE 1320

4 Printer (only TruLab pH/ISE 1320 P)

1 Operating LED

– Is illuminated: Printer is switched on

Switching on the

printer

– Flashes: Printer is switched off

2 Control panel with the keys <FEED> and <ON/OFF>

3 Lever to open the paper compartment

4 Lid of the paper compartment

4.1 Commissioning / switching the printer on or off

1. Connect the power pack to the TruLab pH/ISE 1320 P.

The LED lights up green. The printer is ready for operation. or When the printer had been switched off (LED flashing): Switch on the printer with <ON/OFF>. The LED lights up green. The printer is ready for operation.

If there is a USB-B connection at the same time (e.g. to a PC), the data are output to the PC only.

Switching off the

printer

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1. Switch off the printer with <ON/OFF>.

The LED flashes. The printer is switched off.

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TruLab pH/ISE 1320 Printer (only TruLab pH/ISE 1320 P)

4.2 Operation / printing

Data are only output to the printer if the following requirements are met

 Data are transmitted manually or automatically (see section 11.1 OPTIONS

FOR DATA TRANSMISSION, page 84)

 The printer is switched on (LED illuminated)

 There is no USB connection.

4.3 Printer settings

To open the Storage & config menu, press the <ENTER_> key in the measured value display. After completing the settings, switch to the measured value dis play with <M>.

Default settings are printed in bold.

Menu item Possible set-

Description

ting

System / Printer / Font size

12x20

8x16 7x16

Select the font size for the printer

A print sample (font of the printer) to view the available font sizes can be output with <ON/OFF_>.

System / Printer / Print test page

- The printer prints the meter informa-

tion from the menu, System / Ser- vice information. The current printer settings are used for the printout.

4.4 Maintenance

4.4.1 Changing the roll of paper (thermal paper)

1. Pull the lever (3) until the lid (4) of the paper compartment opens.

2. If necessary, remove any remains of the old roll of paper.

3. Insert the new roll of paper. The start of the paper should poke out of the

paper compartment.

4. Close the lid (4) of the paper compartment so that it clicks into place.

5. If necessary, move the printer paper forward with <FEED>.

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Printer (only TruLab pH/ISE 1320 P) TruLab pH/ISE 1320

4.5 What to do if... / printer

Integrated printer

does not print

Cause Remedy

– Printer switched off

(LED flashing)

– Switch on the printer

(LED illuminated)

– No power pack connected – Connect the power pack

– USB cable connected – Disconnect the USB cable from the

meter

Printer operating -

paper not being

printed

Integrated printer

prints automatically

– Function "store automatically at

intervals" with long intervals is switched on

– Switch off the function (see section

10.2 AUTOMATIC DATA STORAGE AT

INTERVALS, page 79)

– No paper available – Insert a roll of paper

Cause Remedy

– Paper inserted the wrong way up – Turn the roll of paper around and

insert it with the other side upwards

Cause Remedy

– The function "store automatically

at intervals" or "transmit data automatically at intervals" is switched on

– Switch off the functions (see sec-

tion 10.2 AUTOMATIC DATA STORAGE

AT INTERVALS, page 79 or

section 11.1 OPTIONS FOR DATA

TRANSMISSION, page 84)

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TruLab pH/ISE 1320 Operation

STOSTO

RCL

ARAR

5Operation

5.1 General operating principles

5.1.1 Keypad

In this operating manual, keys are indicated by brackets <..> . The key symbol (e.g. <ENTER>) generally indicates a short keystroke (under

sec) in this operating manual. A long keystroke (approx. 2 sec) is indicated

2 by the underscore behind the key symbol (e.g. <ENTER__>).

<F1>: <F1__>: <F2>: <F2__>:

Softkeys providing situation dependent functions, e.g.: <F2>/[USB output]:

Outputs data to the USB interface

<F2__>/[USB output]:

Configures the automatic data output to the USB inter-

face

<On/Off>: Switches the meter on or off

<M>: Selects the measured parameter / Quits the settings

<CAL>: <CAL__>:

<STO>: <STO__>:

<RCL>: <RCL__>:

Calls up the calibration procedure Displays the calibration data

Saves a measured value manually Opens the menu for the automatic save function

Displays the manually stored measured values Displays the automatically stored measured values

Menu control, navigation

<><>: <__><__>:

Increments, decrements values Increments, decrements values continuously

<ENTER>: <ENTER__>:

Opens the menu for measurement settings / confirms entries Opens the menu for system settings

<AR> Freezes the measured value (HOLD function)

Switches the AutoRead measurement on or off

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Operation TruLab pH/ISE 1320

HOLD AR

25.0

6.093

°C

6 7 8 9

AutoCal

12.12.2012 12:12

USB output

YSI

5.1.2 Display

1 Status information (sensor)

2 Measured value (with unit)

3 Measured parameter

4 Continuous measurement control (CMC function)

5 Channel display: Plug position of the sensor

6 Sensor symbol (calibration evaluation, calibration interval)

7 Measured temperature (with unit)

8 Status information (meter)

9 Softkeys and date + time

5.1.3 Status information (meter)

AR Stability control (AutoRead) is active

HOLD Measured value is frozen (<AR> key)

Batteries are almost empty

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TruLab pH/ISE 1320 Operation

5.1.4 Socket field

1 pH electrode or ion selective electrode 1

2 Reference electrode 1

3 Temperature sensor 1

4 pH electrode or ion selective electrode 2

5 Reference electrode 2

6 Temperature sensor 2

7 Mini USB-B interface

8 Power pack

9 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 customary sensors fulfill these conditions.

5.2 Switching on the meter

1. Switch the meter on with <On/Off>. The meter performs a self-test. The display shows the manufacturer's logo while the self-test is being performed. The measured value display appears.

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Operation TruLab pH/ISE 1320

6.949

25.0

°C

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USB output

5.3 Switching off

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

Automatic switch-off The instrument has an automatic switch-off function in order to save the

batteries (see switches off the measuring instrument if no key is pressed for an adjustable period.

The automatic switchoff is not active

 if the communication cable is connected

 if the Automatic data storage function is active, or with automatic data trans-

mission

 if the power pack is connected

Display illumination The meter automatically switches off the display illumination if no key is

pressed for 30 again.

You can also generally switch the display illumination on or off (see section

9.3.1 SYSTEM, page 75).

section 9.3.1 SYSTEM, page 75). The automatic switchoff

seconds. The illumination is switched on with the next keystroke

5.4 Navigation

The principles of navigation in menus and dialogs are explained in the following sections.

5.4.1 Operating modes

The meter has the following operating modes:

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TruLab pH/ISE 1320 Operation

Operating

Description

mode

Measuring The measurement data of the connected sensor are shown

in the measured value display

Calibration The course of a calibration with calibration information, func-

tions and settings is displayed

Storage in

The meter stores measuring data automatically or manually

memory

Transmitting data

The meter transmits measuring data and calibration records to a USB-B interface automatically or manually

Setting The system menu or a sensor menu with submenus, set-

tings and functions is displayed

Only those displays and functions are available in the active operating mode that are currently being required.

5.4.2 Measured value display

In the measured value display, open the setting menus with <MENU/ENTER>. The current functions of the softkeys are shown on the display.

 Use <MENU/ENTER> (short pressure) to open the menu for calibration and

measurement settings for the displayed measured parameter.

 Use <MENU/ENTER__> (long keystroke (approx. 2 s) to open the Storage

& config menu with the sensor-independent settings.

Use the keys of the keypad to carry out further functions such as storage or calibration (see section 5.1.1 KEYPAD, page 17). These functions are not available in other operating situations.

5.4.3 Menus and dialogs

The menus for settings and dialogs in procedures contain further submenus.

 To select a subelement, use the <><> keys. The current selection is dis-

played with a frame.

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

<F1>[Back].

 Use <M> to return to the measured value display.

5.4.4 Elements in menus and dialogs

 Submenus

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

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Operation TruLab pH/ISE 1320

General Interface Clock Service information Reset

System

12.12.2012 12:12

Back

Language: Deutsch Beep: Off Illumination: On Contrast

: 50 %

Switchoff time: 1 h Temperature unit

: °C

Stability control

: On

General

12.12.2012 12:12

Back

Calibration record Calibration data storage Serial number (sensor) Buffer

: TEC

One point calibration: Yes Calibration interval

: 7 d

Unit for slope

: mV/pH

2.00 4.01 7.00 10.01

12.12.2012 12:12

Back

 Settings

Settings are indicated by a colon. The current setting is displayed on the right-hand side. The setting mode is opened with <MENU/ENTER>. Subse quently, the setting can be changed with <><> and <MENU/ENTER>. Example:

 Functions

 Messages

22 ba76157e01 03/2014

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

Information is marked by the i symbol. They cannot be selected. Example:

Page 23

TruLab pH/ISE 1320 Operation

Calibration record Calibration data storage Serial number (sensor) Buffer

: TEC

One point calibration

: Yes

Calibration interval: 7 d Unit for slope

: mV/pH

2.00 4.01 7.00 10.01

12.12.2012 12:12

Back

6.949

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°C

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USB output

System Data storage

Storage & config

12.12.2012 12:12

Back

5.4.5 Example 1 on navigation: Setting the language

1. Press the <On/Off> key. The measured value display appears. The instrument is in the measuring mode.

ba76157e01 03/2014 23

2. Using <MENU/ENTER__>, open the Storage & config menu. The instrument is in the setting mode.

3. Select the System submenu with <><>. The current selection is displayed with a frame.

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

Page 24

Operation TruLab pH/ISE 1320

General Interface Clock Service information Reset

System

12.12.2012 12:12

Back

Language: Deutsch Beep: Off Illumination

: On

Contrast

: 50 %

Switchoff time: 1 h Temperature unit

: °C

Stability control

: On

General

12.12.2012 12:12

Back

Language: Deutsch Beep

: Off

Illumination

: On

Contrast

: 50 %

Switchoff time

: 1 h

Temperature unit

: °C

Stability control: On

General

12.12.2012 12:12

Back

5. Select the General submenu with <><>.

The current selection is displayed with a frame.

6. Open the General submenu with <MENU/ENTER>.

24 ba76157e01 03/2014

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

8. Select the required language with <><>.

9. Confirm the setting with <MENU/ENTER>. The meter switches to the measuring mode. The selected language is active.

Page 25

TruLab pH/ISE 1320 Operation

Date format: dd.mm.yyyy Date

: 12.12.2012

Time

: 12:12:25

Clock

12.12.2012 12:12

Back

5.4.6 Example 2 on navigation: Setting the date and time

The measuring instrument has a clock with a date function. The date and time are shown in the measured value display. When storing measured values and calibrating, the current date and time are automatically stored as well.

The correct setting of the date and 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.

After a fall of the supply voltage (empty batteries), the date and time are reset.

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

1. In the measured value display: Using <MENU/ENTER__>, open the Storage & config menu. The instrument is in the setting mode.

2. Select and confirm the System / Clock menu with <><> and <MENU/ENTER>. The setting menu for the date and time opens up.

3. Select and confirm the Time menu with <><> and <MENU/ ENTER>. The hours are highlighted.

ba76157e01 03/2014 25

4. Change and confirm the setting with <><> and <MENU/ENTER>. The minutes are highlighted.

5. Change and confirm the setting with <><> and <MENU/ENTER>. The seconds are highlighted.

6. Change and confirm the setting with <><> and <MENU/ENTER>. The time is set.

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Operation TruLab pH/ISE 1320

7. If necessary, set the Date and Date format. The setting is made similarly to that of the time.

8. To make further settings, switch to the next higher menu level with [Back]<F1>. or Switch to the measured value display with <M>. The instrument is in the measuring mode.

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TruLab pH/ISE 1320 Operation

Channel display Display of the plug position for the respective parameter. The filled bar indicates for each connected sensor to which plug position of the meter it is connected.

6.949

24.8 °C

12.12.2012 12:12

USB output

6.966

25.0

°C

12.12.2012 12:12

USB output

5.5 Channel display

The TruLab pH/ISE 1320 manages the connected sensors and displays which sensor is plugged to which connection.

5.5.1 Display of several sensors in the measuring mode

The measured values of the connected sensors can be displayed in the following ways:

 Clear display of all connected sensors

 Detailed display of one sensor

(e.g. incl. CMC feature with pH sensors)

With the softkey you can very easily switch between the two display types. The suitable softkey is displayed depending on the operating situation.

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pH value TruLab pH/ISE 1320

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USB output

6 pH value

6.1 Measuring

6.1.1 Measuring the pH value

NOTE

When connecting an earthed PC/printer, measurements cannot be performed in earthed media as the values would be incorrect. The USB interface is not galvanically isolated.

To ensure the high measurement accuracy of the measuring system, always measure with a calibrated electrode (see section 6.2 CALIBRATION, page 31).

1. Connect the pH electrode to the meter.

2. If necessary, select the measured parameter with <M>.

3. When measuring without temperature sensor: Temper the test sample or measure the current temperature and enter it with <>

4. Immerse the pH electrode in the test sample. The measured value is checked for stability (automatic stability control). The display of the measured parameter flashes.

5. Wait for a stable measured value. The display of the measured parameter no longer flashes.

<>.

Stability control

(AutoRead)

& HOLD function

The stability control function (AutoRead) continually checks the stability of the measurement signal. The stability has a considerable impact on the reproduc ibility of measured values.

The measured parameter flashes on the display

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

 when the automatic Stability control is switched off.

You can activate or switch off the automatic Stability control function (see section 9.3.1 SYSTEM, page 75).

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TruLab pH/ISE 1320 pH value

1. Freeze the measured value with <AR>. The [HOLD] status indicator is displayed. The HOLD function is active.

You can terminate the Stability control function and the HOLD func- tion with <AR> or <M> at any time.

2. Using <ENTER>, activate the Stability control function manually. The [AR] status indicator appears while the measured value is assessed as not stable. A progress bar is displayed and the display of the measured parameter flashes. The [HOLD][AR] status indicator appears as soon as a stable measured value is recognized. The progress bar disappears and the display of the measured parameter stops flashing. The current measurement data is output to the interface. Measurement data meeting the stability control criterion is marked by AR.

Criteria for a stable

measured value

You can prematurely terminate the Stability control function manually with <ENTER> at any time. If the Stability control function is prematurely terminated, the current measurement data are output to the interface without the AutoRead info.

3. Using <ENTER>, start a further measurement with stability control.

or Release the frozen measured value again with <AR> or <M>. The [AR] status display disappears. The display switches back to the previous indication.

The Stability control function checks whether the measured values are stable within the monitored time interval.

Measured

Time interval Stability in the time interval

parameter

pH value 15 seconds ∆ : better than 0.01 pH

Temperature 15 seconds ∆ : better than 0.5 °C

The minimum duration until a measured value is assessed as stable is the monitored time interval. The actual duration is mostly longer.

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pH value TruLab pH/ISE 1320

6.1.2 Measuring the temperature

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 with the temperature sensor

30 or Pt 1000) integrated in the sensor.

(NTC

 Measurement by an external temperature sensor.

 Manual determination and input of the temperature.

The measuring instrument 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:

Temperatur

e sensor

Resolution of the

temp. display

Temp. measurement

yes 0.1 °C Automatic with temperature sensor

- 1 °C Manual

If you wish to measure (or calibrate) without temperature sensor, proceed as follows:

1. Measure the current temperature of the test sample.

2. Set the temperature value with <><>. or In the <MENU/ENTER>/pH/Man. temperature menu, set the tempera- ture value with <><>.

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TruLab pH/ISE 1320 pH value

6.2 Calibration

6.2.1 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 and stores the current values of the zero point and slope of the electrode. Thus, you should calibrate at regular intervals.

6.2.2 When do you have to calibrate?

 After connecting a sensor

 Routinely within the framework of the company quality assurance

 When the calibration interval has expired

6.2.3 Automatic calibration (AutoCal)

Make sure that in the sensor menu, Buffer menu, the buffer set is correctly selected (see

9.1.1 SETTINGS FOR PH MEASUREMENTS, PAGE 66).

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

Below, calibration with Technical buffers (TEC) is described. When other buffer sets are used, other nominal buffer values are displayed. Apart from that, the procedure is identical.

If single-point calibration was set in the menu, the calibration procedure is automatically finished with the measurement of buffer solution 1 and the calibration record is displayed.

1. Connect the pH electrode to the meter.

2. Keep the buffer solutions ready. When measuring without temperature sensor: Temper the buffer solutions or measure the current temperature.

3. In the measured value display, select the measured parameter pH or mV with <M>.

4. Start the calibration with <CAL>. The calibration display for the first buffer appears (voltage display).

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pH value TruLab pH/ISE 1320

pH 1

-180.0

24.8 °C

AutoCal TEC

12.12.2012 12:12

Buffer

-180.0

24.8 °C

AutoCal TEC

10.011

12.12.2012 12:12

Buffer

5. Thoroughly rinse the electrode with deionized water.

6. Immerse the electrode in the first buffer solution.

7. When measuring without temperature sensor:

Enter the temperature of the buffer with <><>.

8. Start the measurement with <ENTER>. The measured value is checked for stability (stability control). The [AR] status indicator is displayed. A progress bar is displayed and the display of the measured parameter flashes.

9. Wait for the end of the measurement with stability control or accept the

10. If necessary, finish the calibration procedure as a single-point calibration

Continuing with two-

point calibration

32 ba76157e01 03/2014

11. Thoroughly rinse the electrode with deionized water.

12. Immerse the electrode in the second buffer solution.

13. When measuring without temperature sensor:

calibration value with <ENTER>. The calibration display for the next buffer appears (voltage display).

with <M>. The calibration record is displayed.

For single-point calibration, the instrument uses the Nernst slope (-59.2

mV/pH at 25 °C) and determines the zero point of the elec-

trode.

Enter the temperature of the buffer with <><>.

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TruLab pH/ISE 1320 pH value

0.0

24.8 °C

AutoCal TEC

7.000

12.12.2012 12:12

Buffer

180.0

24.8 °C

AutoCal TEC

4.010

12.12.2012 12:12

Buffer

14. Start the measurement with <ENTER>. The measured value is checked for stability (stability control). The [AR] status indicator is displayed. A progress bar is displayed and the display of the measured parameter flashes.

15. Wait for the measurement with stability control to be completed or terminate the stability control and take over the calibration value with <ENTER>. The calibration display for the next buffer appears (voltage display).

Continuing with

three- to five-point

calibration

16. If necessary, finish the calibration procedure as a two-point calibration with <M>. The calibration record is displayed.

17. Thoroughly rinse the electrode with deionized water.

18. Immerse the electrode in the next buffer solution.

19. When measuring without temperature sensor: Enter the temperature of the buffer with <><>.

20. Start the measurement with <ENTER>. The measured value is checked for stability (stability control). The [AR] status indicator is displayed. A progress bar is displayed and the display of the measured parameter flashes.

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pH value TruLab pH/ISE 1320

0.0

24.8 °C

ConCal

12.12.2012 12:12

Buffer

21. Wait for the measurement with stability control to be completed or terminate the stability control and take over the calibration value with <ENTER>. The calibration display for the next buffer appears (voltage display).

22. If necessary, use <M> to finish calibration or Continue calibrating using the next buffer with <ENTER>.

Calibration is automatically completed after the last buffer of a buffer set has been measured. Then the calibration record is displayed.

The calibration line is determined by linear regression.

6.2.4 Manual calibration (ConCal)

Make sure that in the sensor menu, Buffer menu, the ConCal buffer set is selected (see

section 9.1.1 SETTINGS FOR PH MEASUREMENTS, page 66).

Use any one to five buffer solutions in ascending or descending order.

If single-point calibration was set in the menu, the calibration procedure is automatically finished with the measurement of buffer solution 1 and the calibration record is displayed.

1. Connect the pH electrode to the meter. The pH measuring window is displayed.

2. Keep the buffer solutions ready. When measuring without temperature sensor: Temper the buffer solutions or measure the current temperature.

3. In the measured value display, select the measured parameter pH or mV with <M>.

4. Start the calibration with <CAL>. The calibration display appears.

34 ba76157e01 03/2014

5. Thoroughly rinse the electrode with deionized water.

6. Immerse the electrode in the first buffer solution.

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TruLab pH/ISE 1320 pH value

0.0

24.8 °C

ConCal

7.000

12.12.2012 12:12

Buffer

7.000

24.8 °C

ConCal

12.12.2012 12:12

Buffer

 

7. When measuring without temperature sensor:

Enter the temperature of the buffer with <><>.

9. Wait for the end of the measurement with stability control or accept the calibration value with <ENTER>. The calibration display for the setting of the nominal buffer value appears.

10. Set the nominal buffer value for the measured temperature with <><>.

11. Accept the set calibration value with <ENTER>. The calibration display for the next buffer appears (voltage display).

12. If necessary, finish the calibration procedure as a single-point calibration with <M>. The calibration record is displayed.

For single-point calibration, the instrument uses the Nernst slope (-59.2

mV/pH at 25 °C) and determines the zero point of the elec-

Continuing with two-

point calibration

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13. Thoroughly rinse the electrode with deionized water.

trode.

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pH value TruLab pH/ISE 1320

4.035

24.8 °C

ConCal

12.12.2012 12:12

Buffer

 

14. Immerse the electrode in the second buffer solution.

15. When measuring without temperature sensor:

Enter the temperature of the buffer with <><>.

16. Start the measurement with <ENTER>. The measured value is checked for stability (stability control). The [AR] status indicator is displayed. A progress bar is displayed and the display of the measured parameter flashes.

17. Wait for the measurement with stability control to be completed or terminate the stability control and take over the calibration value with <ENTER>. The calibration display for the setting of the nominal buffer value appears.

Continuing with

three- to five-point

calibration

18. Set the nominal buffer value for the measured temperature with <><>.

19. Accept the set calibration value with <ENTER>. The calibration display for the next buffer appears (voltage display).

20. Finish the calibration procedure as a two-point calibration with <M>. The calibration record is displayed.

21. Thoroughly rinse the electrode with deionized water.

22. Immerse the electrode in the next buffer solution.

23. When measuring without temperature sensor: Enter the temperature of the buffer with <><>.

24. Start the measurement with <ENTER>. The measured value is checked for stability (stability control). The [AR] status indicator is displayed. A progress bar is displayed and the display of the measured parameter flashes.

25. Wait for the measurement with stability control to be completed or terminate the stability control and take over the calibration value with <ENTER>. The calibration display for the setting of the nominal buffer value appears.

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TruLab pH/ISE 1320 pH value

9.958

24.8 °C

ConCal

12.12.2012 12:12

Buffer

 

26. Set the nominal buffer value for the measured temperature with

<><>.

27. Accept the set calibration value with <ENTER>. The calibration display for the next buffer appears (voltage display).

28. Use <M> to finish calibration or Continue calibrating using the next buffer with <ENTER>.

After the fifth buffer has been measured the calibration is automatically finished. Then the calibration record is displayed.

The calibration line is determined by linear regression.

6.2.5 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:

Values to be determined

1-point Asy  Zero point = Asy

2-point Asy

Slp.

3-point to 5-point

Asy Slp.

Displayed calibration data

 Slope = Nernst slope

(-59.2 mV/pH at 25 °C)

 Zero point = Asy

 Slope = Slp.

 Zero point = Asy

 Slope = Slp.

The calibration line is calculated by linear regression.

You can display the slope in the units, mV/pH or % (see section

ba76157e01 03/2014 37

9.1.1 SETTINGS FOR PH MEASUREMENTS, page 66).

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pH value TruLab pH/ISE 1320

6.2.6 Calibration data

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

Displaying the

calibration data

Displaying the

calibration data

storage

The calibration record of the last calibration is to be found under the menu item,

<MENU/ENTER> / Calibration / / Calibration record. To open it, press the <CAL__> key in the measured value display.

Subsequently, you can transmit the displayed calibration data to the interface, e. g. to a PC, with <F2>[USB output].

The calibration records of the last calibrations (up to 10) are given in the menu,

<MENU/ENTER>/Calibration / Calibration data storage.

Menu item Setting/func-

Description

tion

Calibration /

- Displays the calibration record.

Calibration data storage /Display

Further options:  Scroll through the calibration

records with <><>.

 Output the displayed calibra-

tion record to the interface with <F2>/[USB output].

 Quit the display with <F1>/

[Back] or <MENU/ENTER>.

Calibration

evaluation

 Switch directly to the mea-

sured value display with <M>.

Calibration / Calibration data stor-

- Outputs the calibration records to the interface.

age / Output to USB

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.

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TruLab pH/ISE 1320 pH value

TruLab pH/ISE 1320 Ser. no. 11292113

CALIBRATIONpH

12.12.2012 15:55

Ser. no. 10501234 AutoCal TEC Buffer 1 4.01 Buffer 2 7.00 Buffer 3 10.01 Voltage 1 184.0 mV Voltage 2 3.0 mV Voltage 3 -177.0 mV Temperature 1 24.0 °C Temperature 2 24.0 °C Temperature 3 24.0 °C Slope -60.2 mV/pH Asymmetry 4.0 mV Sensor +++

Display Calibration

record

+++

Clean the electrode according to the electrode operating manual

Error Error

Error elimination (see section 13 WHAT TO

DO IF..., page 89)

Zero point [mV]

Slope [mV/pH]

- 15 ... + 15 -60.5 ... -58.0

- 20 ... <-15

>-58.0 ... -57.0 or >+15 ... + 20

- 25 ... <- 20 or >+ 20 ... + 25

- 30 ... <- 25 or

->+25 ... + 30

-61.0 ... <-60.5

>-57.0 ... -56.0

-62.0 ... <-61.0

>-56.0 ... -50.0

- 30 ... + 30 -62.0 ... -50.0

Calibration record

(example)

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pH value TruLab pH/ISE 1320

25.0

6.093

°C

12.12.2012 12:12

USB output

6.2.7 Continuous measurement control (CMC function)

The Continuous Measurement Control (CMC function) facilitates to evaluate the current measured value instantly and definitely.

After each successful calibration the scale of the pH measuring range is displayed in the measured value display. Here you can very clearly see whether or not the current measured value is in the calibrated part of the measuring range.

The following information is displayed:

1 Measuring range for which a valid calibration is available (white).

Measured values in this range are suitable for documentation.

2 Measuring range for which no valid calibration is available (shaded).

Measured values in this range are not suitable for documentation. If necessary, calibrate the meter with buffers covering this measuring range. If the current measured value is outside the calibrated range, this area is shaded stronger. If a measured value is outside the measuring range pH 0 - 14, overflow arrows are displayed at the left or right edge of the measuring range.

3 Currently measured pH value (needle)

4 Marking lines for all nominal buffer values used with the last valid cali-

bration

The limits of the calibrated range are determined by the buffers used for calibration:

Lower limit: Buffer with lowest pH value - 2 pH units Upper limit: Buffer with highest pH value + 2 pH units

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TruLab pH/ISE 1320 ORP voltage

157.0 mV

24.8 °C

12.12.2012 12:12

USB output

7 ORP voltage

7.1 Measuring

7.1.1 Measuring the ORP

NOTE

When connecting an earthed PC/printer, measurements cannot be performed in earthed media as the values would be incorrect. The USB interface is not galvanically isolated.

1. Connect the ORP electrode to the meter.

2. If necessary, select the U (mV) display with <M>.

3. When measuring without temperature sensor:

Measure the temperature of the test sample and enter it with <> <>.

4. Rinse the ORP electrode and immerse it in the test sample. The measured value is checked for stability (automatic stability control). The display of the measured parameter flashes.

Stability control

(AutoRead )

5. Wait for a stable measured value. The display of the measured parameter no longer flashes.

The stability control function (AutoRead) continually checks the stability of the measurement signal. The stability has a considerable impact on the reproduc ibility of measured values.

You can activate or switch off the automatic Stability control function (see section 9.3.1 SYSTEM, page 75).

The measured parameter flashes on the display

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

 when you switch over between the measured parameters with <M>.

 when the automatic Stability control is switched off.

Criteria for a stable

measured value

The Stability control function checks whether the measured values are stable within the monitored time interval.

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ORP voltage TruLab pH/ISE 1320

Manually starting

the stability control

Measured parame-

Time interval Stability in the time interval

ter

ORP voltage 15 seconds ∆ : better than 0.3 mV

Temperature 15 seconds ∆ : better than 0.5 °C

The minimum duration until a measured value is assessed as stable is the monitored time interval. The actual duration is mostly longer.

You can start the Stability control manually at any time, irrespective of the setting for automatic Stability control (see section 9.3.1 SYSTEM, page 75) in the System menu.

1. Freeze the measured value with <AR>. The [HOLD] status indicator is displayed.

sured parameter flashes. The [HOLD][AR] status indicator appears as soon as a stable measured value is recognized. The progress bar disappears and the display of the measured parameter stops flashing. The current measurement data is output to the interface. Measurement data meeting the stability control criterion is marked by AR.

Freezing the

measured value

(HOLD function)

3. Using <ENTER>, start a further measurement with Stability control. or Release the frozen measured value again with <AR>. The display switches to the measured value display. The [AR][HOLD] status display disappears.

With the HOLD function, you can freeze the current measured value. The displayed measured value stops changing until you switch the HOLD function off.

If the HOLD function is active, you can, e.g. start a manual measurement with stability control.

1. Freeze the measured value with <AR>. The [HOLD] status indicator is displayed.

42 ba76157e01 03/2014

Page 43

TruLab pH/ISE 1320 ORP voltage

ΔU

13.5 mV

24.8 °C

12.12.2012 12:12

USB output

2. Release the frozen measured value again with <AR>. The HOLD function is switched off. The [HOLD] status display disappears.

7.1.2 Measuring the relative ORP

To measure the difference of the ORPs of two solutions, you have to define the ORP of one solution as the zero point first.

pH and ORP electrodes can be used to determine the relative ORP.

1. Connect the ORP electrode to the meter.

2. Prepare the reference solution for the determination of the reference

point.

3. Select the ΔU (mV display with <M>.

4. Immerse the ORP electrode in the reference solution.

5. Display the potential of the current zero point with <CAL>.

6. Press <ENTER> to measure the reference solution.

The measured value is checked for stability (automatic stability control). The display of the measured parameter flashes. The measured potential is defined as the zero point. or Press <M> to terminate the display of the zero point.

7. Rinse the ORP electrode and immerse it in the test sample.

The measured value is checked for stability (automatic stability control). The display of the measured parameter flashes.

8. Wait for a stable measured value.

The display of the measured parameter no longer flashes.

ba76157e01 03/2014 43

AutoRead The Stability control function checks whether the measured values are stable

within the monitored time interval.

Page 44

ORP voltage TruLab pH/ISE 1320

Measured parame-

Time interval Stability in the time interval

ter

ORP 15 seconds ∆ : better than 0.3 mV

Temperature 15 seconds ∆ : better than 0.5 °C

The minimum duration until a measured value is assessed as stable is the monitored time interval. The actual duration is mostly longer.

7.1.3 Measuring the temperature

For reproducible ORP 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 with the temperature sensor

(NTC

30 or Pt 1000) integrated in electrode.

 Measurement by an external temperature sensor.

 Manual determination and input of the temperature.

The measuring instrument 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

Temp. measurement

yes 0.1 °C Automatic with temperature sensor

- 1 °C Manual

If you wish to measure (or calibrate) without temperature sensor, proceed as follows:

1. Measure the current temperature of the test sample.

2. Set the temperature value with <><>. or In the <MENU/ENTER>/U/Man. temperature menu, set the tempera- ture value with <><>.

7.2 ORP calibration

ORP electrodes are not calibrated. You can, however, check ORP electrodes by measuring the ORP of a test solution and comparing the value with the nominal value.

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TruLab pH/ISE 1320 Ion concentration

ISE

0.157 mg/l

25.0

°C

12.12.2012 12:12

USB output

8 Ion concentration

8.1 Measuring

8.1.1 Measuring the ion concentration

NOTE

When connecting an earthed PC/printer, measurements cannot be performed in earthed media as the values would be incorrect. The USB interface is not galvanically isolated.

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

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 [TpErr] warning appears in the measured value display.

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 <M>.

3. If necessary, measure the temperature of the test sample with a thermometer.

4. Calibrate or check the meter with the electrode.

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

5. Immerse the electrode in the test sample.

Stability control

ba76157e01 03/2014 45

(AutoRead)

& HOLD function

The stability control function (AutoRead) continually checks the stability of the measurement signal. The stability has a considerable impact on the reproduc ibility of measured values.

The measured parameter flashes on the display

Page 46

Ion concentration TruLab pH/ISE 1320

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

 when the automatic Stability control is switched off.

You can activate or switch off the automatic Stability control function (see section 9.1.1 SETTINGS FOR PH MEASUREMENTS, page 66).

1. Freeze the measured value with <AR>.

The [HOLD] status indicator is displayed. The HOLD function is active.

You can terminate the Stability control function and the HOLD func- tion with <AR> or <M> at any time.

2. Using <ENTER>, activate the Stability control function manually.

The [AR] status indicator appears while the measured value is assessed as not stable. A progress bar is displayed and the display of the measured parameter flashes. The [HOLD][AR] status indicator appears as soon as a stable measured value is recognized. The progress bar disappears and the display of the measured parameter stops flashing. The current measurement data is output to the interface. Measurement data meeting the stability control criterion is marked by AR.

3. Using <ENTER>, start a further measurement with stability control. or Release the frozen measured value again with <AR> or <M>. The [AR] status display disappears. The display switches back to the previous indication.

Criteria The AutoRead criteria affect the reproducibility of the measured values. The

following criteria can be adjusted:

 high: highest reproducibility

 medium: medium reproducibility

 low: lowest reproducibility

Increasing reproducibility also causes the response time to increase until a measured value is evaluated as stable.

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TruLab pH/ISE 1320 Ion concentration

8.1.2 Measuring the temperature

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

 Measurement by an external temperature sensor.

 Manual determination and input of the temperature.

The measuring instrument 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:

Temperatur

e sensor

Resolution of the

temp. display

Temp. measurement

yes 0.1 °C Automatic with temperature sensor

- 1 °C Manual

If you wish to measure (or calibrate) without temperature sensor, proceed as follows:

1. Measure the current temperature of the test sample.

2. Set the temperature value with <><>.

or In the <MENU/ENTER>/ISE/Man. temperature menu, set the tempera- ture value with <><>.

ba76157e01 03/2014 47

Page 48

Ion concentration TruLab pH/ISE 1320

ISE

0.0

24.8 °C

Ag 0.010 mg/l

12.12.2012 12:12

Standard

8.2 Calibration

8.2.1 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 calibration line of the electrode and stores this value in the meter. Thus, you should calibrate before each measurement and at regular intervals.

8.2.2 When to calibrate?

 Before any measurement if possible

 After connecting another ISE electrode

 When the sensor symbol flashes, e.g. after a voltage interruption (empty

batteries)

8.2.3 Calibration (ISE Cal)

ISE Cal is the conventional two-point to seven-point calibration procedure that uses 2 to 7 freely selectable standard solutions. The concentration expected for the measurement determines the concentration of the calibration standards.

1. Connect the ISE combination electrode to the meter. The pH/mV/ISE measuring window is displayed.

2. Keep the standard solutions ready.

3. If necessary, measure the temperature of the standard solutions with a thermometer.

4. If necessary, change the unit of the measurement result and calibration standards in the ISE setup/Unit menu.

5. In the measured value display, select the ISE measuring window with

<> and <M>.

<>

6. Start the calibration with <CAL>. The calibration display appears.

48 ba76157e01 03/2014

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TruLab pH/ISE 1320 Ion concentration

ISE

0.0

24.8 °C

12.12.2012 12:12

0.01 mg/

ISE

0.0

24.8 °C

Ag 0.020 mg/l

12.12.2012 12:12

Standard

7. Thoroughly rinse the electrode with distilled water.

8. Immerse the electrode in standard solution 1.

9. When calibrating without temperature sensor:  Measure the temperature of the standard solution using a thermom-

eter.

 Use <F2>/[ T ⇅ C ] to select the setting of the temperature.

 Use <> <> to set the temperature.

 Use <F2>/[ T ⇅ C ] to select the setting of the concentration.

10. Set the concentration of the standard solution with <> <> and press <MENU/ENTER>. The standard solution is measured. The measured value is checked for stability (AutoRead).

Continuing with two-

point calibration

11. Wait for the end of the AutoRead measurement or accept the calibration value with <MENU/ENTER>. The calibration display for the next standard solution appears.

12. Thoroughly rinse the electrode with distilled water.

13. Immerse the electrode in standard solution 2.

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Ion concentration TruLab pH/ISE 1320

ISE

8.9

24.8 °C

12.12.2012 12:12

0.01 m

ISE

20.5

24.8 °C

Ag 0.050 mg/l

12.12.2012 12:12

Standard

14. When calibrating without temperature sensor:  Measure the temperature of the standard solution using a thermom-

eter.

 Use <F2>/[ T ⇅ C ] to select the setting of the temperature.

 Use <> <> to set the temperature.

 Use <F2>/[ T ⇅ C ] to select the setting of the concentration.

15. Set the concentration of the standard solution with <> <> and press <MENU/ENTER>. The standard solution is measured. The measured value is checked for stability (AutoRead).

Continuing with

three- to seven-point

calibration

16. Wait for the end of the AutoRead measurement or accept the calibration value with <MENU/ENTER>. The calibration display for the next standard solution appears.

17. Press <MENU/ENTER> to continue with three-point calibration. or Finish the calibration procedure as a two-point calibration with <M>. The new calibration values are displayed.

Repeat the steps 8 to 13 in the same way with the third and further standard solutions as necessary. The new calibration values are displayed after the last calibration step was completed.

50 ba76157e01 03/2014

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

Page 51

TruLab pH/ISE 1320 Ion concentration

8.2.4 Calibration standards

Use two to seven different standard solutions. The standard solutions have to be selected in either increasing or decreasing order.

Select the unit of the standard solution and measurement result in the ISE setup/Unit menu.

Standard solution (Std 1 - 7) Values

Unit [mg/l] 0.010 ... 500,000

Unit [mol/l] 0.100 ... 5,000 µmol/l

10.00 ... 5,000 mmol/l

Unit [mg/kg] 0.010 ... 500,000

Unit [ppm] 0.010 ... 500,000

Unit [%] 0.001 ... 50,000

Displaying the

calibration data

Displaying the

calibration data

storage

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

tration measurement.

If the measured electrode potential is outside the calibrated range, the [ISEErr] warning is displayed.

8.2.5 Calibration data

The calibration record of the last calibration is to be found under the menu item,

<MENU/ENTER> / Calibration / / Calibration record. To open it, press the <CAL__> key in the measured value display.

Subsequently, you can transmit the displayed calibration data to the interface, e. g. to a PC, with <F2>[USB output].

The calibration records of the last calibrations (up to 10) are given in the menu, <MENU/ENTER>/ ISE / Calibration / Calibration data storage.

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Ion concentration TruLab pH/ISE 1320

TruLab pH/ISE 1320 Ser. no. 12345678

CALIBRATION ISE

18.01.2013 08:09:10

Sensor Ser. no. 12345678

Standard 1 0.010 mg/l Standard 2 0.020 mg/l Voltage 1 38.5 mV Voltage 2 58.0 mV Temperature 1 24.0 øC Temperature 2 24.0 øC Ion type Ag Slope 64.7 mV Sensor +++ _____________________________________

Menu item Setting/func-

tion

Calibration /

- Displays the calibration record.

Calibration data storage /Display

Calibration /

- Outputs the calibration records to

Calibration data storage / Output to USB

Description

Further options:  Scroll through the calibration

records with <><>.

 Output the displayed calibra-

tion record to the interface with <F2>/[USB output].

 Quit the display with <F1>/

[Back] or <MENU/ENTER>.

 Switch directly to the mea-

sured value display with <M>.

the interface.

Calibration record

Calibration

evaluation

(example)

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 < 50 or > 70

Error elimination (see section 13 WHAT TO

DO IF..., page 89)

or < 25 or > 35

52 ba76157e01 03/2014

Page 53

TruLab pH/ISE 1320 Ion concentration

Calibration Man. temperature

: 25 °C

ISE setup Method

: Standard addition

Start method

ISE

12.12.2012 12:12

Back

8.3 Selecting the measuring method

The following methods are supported:

 Standard addition

 Standard subtraction

 Sample addition

 Sample subtraction

 Blank value addition

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 <M>.

3. If necessary, measure the temperature of the test sample with a thermometer.

4. Open the ISE menu with <MENU/ENTER>.

5. Thoroughly rinse the electrode with distilled water.

6. Adjust the temperature of the standard solutions.

7. Select Method with <> <> and confirm with <MENU/ENTER>.

8. Select a method with <> <> and confirm with <MENU/ENTER>.

9. Select Start method with <> <> and confirm with <MENU/ ENTER>. Measurement with the selected method begins (see section 8.3.1 STANDARD ADDITION, page 54 ... section 8.3.5 STANDARD ADDITION WITH

BLANK VALUE CORRECTION (BLANK VALUE ADDITION), page 63).

ba76157e01 03/2014 53

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Ion concentration TruLab pH/ISE 1320

CALIBRATION

12.12.2012 12:12:12 #1 0.010 mg/l 20.2 mV 25.0 °C #2 0.100 mg/l 79.2 mV 25.0 °C Slp.: 59.0 mV Sensor +++ (Ion type: Ag)

12.12.2012 12:12

Continue

USB output

Immerse sensor in sample

Sample volume 100.0 ml ISA/TISAB vol. 1.0 ml Continue

Standard addition

12.12.2012 12:12

Back

8.3.1 Standard addition

In the "Standard addition" procedure, a known amount of standard solution is added to the sample.

The ion concentration in the sample is calculated from the change in potential.

1. Select the measuring method (see section 8.3 SELECTING THE MEASUR-

ING METHOD, page 53).

2. Prepare two standard calibration solutions.

3. Perform a two-point calibration according to user guidance.

4. The calibration record is displayed as soon as a stable value is achieved for the second standard calibration solution.

Measuring

5. Start the measurement with <F1>/[Continue]. An entry window appears.

6. Prepare the sample.

7. If necessary, add the ISA/TISAB solution to the sample.

8. Thoroughly rinse the electrode with deionized water.

9. Immerse the electrode in the sample.

54 ba76157e01 03/2014

10. Using <> <> and <MENU/ENTER>, select the values for the volume of the sample (Sample volume) and the volume of the ISA/TISAB solution (ISA/TISAB vol.).

Page 55

TruLab pH/ISE 1320 Ion concentration

Add standard!

Std. volume 1.0 ml Std. conc. 1.0 mg/l Continue

Standard addition

12.12.2012 12:12

Back

ISE

0.321

24.8 °C

12.12.2012 12:12

Standard addition

mg/l

USB output

11. Select Continue with <> <> and start the measurement with

<MENU/ENTER>. When the measurement is finished an entry window appears.

12. Add the standard solution to the sample.

13. Using <> <> and <MENU/ENTER>, enter the values for the vol-

ume of the standard solution (Std. volume) and concentration of the standard solution (Std. conc.) .

14. Select Continue with <> <> and start the measurement with

<MENU/ENTER>. The measurement result is displayed when the measurement is completed.

15. If necessary, start measuring further samples with <MENU/ENTER>. Repeat steps 6 - 14 for all samples.

16. Terminate the measuring method with <M>. A safety query appears.

17. Select Yes with <> <>.

18. Confirm Yes with <MENU/ENTER>. Measurement with the selected method is completed.

ba76157e01 03/2014 55

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Ion concentration TruLab pH/ISE 1320

CALIBRATION

12.12.2012 12:12:12 #1 0.010 mg/l 20.2 mV 25.0 °C #2 0.100 mg/l 79.2 mV 25.0 °C Slp.: 59.0 mV Sensor +++ (Ion type: Ag)

12.12.2012 12:12

Continue

USB output

Immerse sensor in sample

Sample volume 100.0 ml ISA/TISAB vol. 1.0 ml Continue

Standard subtraction

12.12.2012 12:12

Back

8.3.2 Standard subtraction

In the "Standard Subtraction" procedure, a known amount of standard solution is added to the sample (as complexing agent or precipitating agent) and, thus, the ion concentration lowered.

The ion concentration in the sample is calculated from the change in potential.

1. Select the measuring method (see section 8.3 SELECTING THE MEASUR-

ING METHOD, page 53).

Calibration

Measuring

2. Prepare two standard calibration solutions.

3. Perform a two-point calibration according to user guidance.

4. The calibration record is displayed as soon as a stable value is achieved for the second standard calibration solution.

5. Start the measurement with <F1>/[Continue]. An entry window appears.

6. Prepare the sample.

56 ba76157e01 03/2014

7. If necessary, add the ISA/TISAB solution to the sample.

8. Thoroughly rinse the electrode with deionized water.

9. Immerse the electrode in the sample.

Page 57

TruLab pH/ISE 1320 Ion concentration

Add standard!

Ion type S Std. volume 1.0 ml Std. conc. 1.0 mg/l Continue

Standard subtraction

12.12.2012 12:12

Back

ISE

0.321

24.8 °C

12.12.2012 12:12

Standard subtraction

mg/l

USB output

10. Using <> <> and <MENU/ENTER>, select the values for the vol-

ume of the sample (Sample volume) and the volume of the ISA/TISAB solution (ISA/TISAB vol.).

11. Select Continue with <> <> and start the measurement with

<MENU/ENTER>. When the measurement is finished an entry window appears.

12. Add the standard (complexing agent or precipitating agent) to the sample.

13. Using <> <> and <MENU/ENTER>, enter the values for the volume of the standard solution (Std. volume) and concentration of the standard solution (Std. conc.) .

14. If necessary, set the ion type for the ion in the standard (Ion type) with

<> and <MENU/ENTER>.

<>

On selection of the ion type that can be defined (ION): Using <> <> and <MENU/ENTER>, set the valence (Valency) and molar weight (Molar mass) for the ion in the standard solution.

15. Select Continue with <> <> and start the measurement with <MENU/ENTER>. The measurement result is displayed when the measurement is completed.

ba76157e01 03/2014 57

16. If necessary, start measuring further samples with <MENU/ENTER>. Repeat steps 6 - 13 for all samples.

17. Terminate the measuring method with <M>. A safety query appears.

18. Select Yes with <> <>.

Page 58

Ion concentration TruLab pH/ISE 1320

19. Confirm Yes with <MENU/ENTER>. Measurement with the selected method is completed.

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TruLab pH/ISE 1320 Ion concentration

CALIBRATION

12.12.2012 12:12:12 #1 0.010 mg/l 20.2 mV 25.0 °C #2 0.100 mg/l 79.2 mV 25.0 °C Slp.: 59.0 mV Sensor +++ (Ion type: Ag)

12.12.2012 12:12

Continue

USB output

Immerse sensor in standard

Std. volume 100.0 ml Std. conc. 1.0 mg/l ISA/TISAB vol. 1.0 ml Continue

Sample addition

12.12.2012 12:12

Back

8.3.3 Sample addition

In the "Sample addition" procedure, a known amount of sample is added to the standard solution.

The ion concentration in the sample is calculated from the change in potential.

1. Select the measuring method (see section 8.3 SELECTING THE MEASUR-

ING METHOD, page 53).

Calibration

Measuring

2. Prepare two standard calibration solutions.

3. Perform a two-point calibration according to user guidance.

4. The calibration record is displayed as soon as a stable value is achieved for the second standard calibration solution.

5. Start the measurement with <F1>/[Continue]. An entry window appears.

6. Prepare the standard solution.

7. If necessary, add the ISA/TISAB solution to the standard solution.

8. Thoroughly rinse the electrode with deionized water.

ba76157e01 03/2014 59

9. Immerse the electrode in the standard.

10. Using <> <> and <MENU/ENTER>, enter the values for the volume of the standard solution (Std. volume), the concentration of the standard solution (Std. conc.) and the volume of the ISA/TISAB solu tion (ISA/TISAB vol.).

Page 60

Ion concentration TruLab pH/ISE 1320

Add sample!

Sample volume 1.0 ml Continue

Sample addition

12.12.2012 12:12

Back

ISE

0.321

24.8 °C

12.12.2012 12:12

Sample addition

mg/l

USB output

11. Select Continue with <> <> and start the measurement with

<MENU/ENTER>. When the measurement is finished an entry window appears.

12. Add the sample to the standard solution.

13. Using <> <> and <MENU/ENTER>, enter the value for the volume

of the sample (Sample volume).

14. Select Continue with <> <> and start the measurement with

<MENU/ENTER>. The measurement result is displayed when the measurement is completed.

15. If necessary, start measuring further samples with <MENU/ENTER>. Repeat steps 6 - 12 for all samples.

16. Terminate the measuring method with <M>. A safety query appears.

17. Select Yes with <> <>.

18. Confirm Yes with <MENU/ENTER>. Measurement with the selected method is completed.

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TruLab pH/ISE 1320 Ion concentration

Set the ion type for the standard.

Ion type S Continue

Sample subtraction

12.12.2012 12:12

Back

CALIBRATION

12.12.2012 12:12:12 #1 0.010 mg/l 79.2 mV 25.0 °C #2 0.100 mg/l 20.2 mV 25.0 °C Slp.: -59.0 mV Sensor +++ (Ion type: S)

12.12.2012 12:12

Continue

USB output

8.3.4 Sample subtraction

With the "Sample subtraction" procedure, a known amount of sample is added to the standard solution (complexing agent or precipitating agent).

The ion concentration in the sample is calculated from the change in potential. The sample subtraction is one method for the indirect determination of ions. It is used for the determination of ions for which no direct determination is possi ble.

1. Select the measuring method (see section 8.3 SELECTING THE MEASUR-

ING METHOD, page 53).

Calibration

2. If necessary, set the ion type for the ion in the standard (Ion type (sub))

with <>

<> and <MENU/ENTER>.

On selection of the ion type that can be defined (ION): Using <> <> and <MENU/ENTER>, set the valence (Valency) and molar weight (Molar mass) for the ion in the standard solution.

3. Select Continue with <> <> and confirm with <MENU/ENTER>.

4. Prepare two standard calibration solutions.

5. Perform a two-point calibration according to user guidance.

6. The calibration record is displayed as soon as a stable value is achieved for the second standard calibration solution.

ba76157e01 03/2014 61

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Ion concentration TruLab pH/ISE 1320

Immerse sensor in standard

Std. volume 100.0 ml Std. conc. 1.0 mg/l ISA/TISAB vol. 1.0 ml Continue

Sample subtraction

12.12.2012 12:12

Back

Add sample!

Sample volume 1.0 ml Continue

Sample subtraction

12.12.2012 12:12

Back

Measuring

7. Start the measurement with <F1> Continue. An entry window appears.

8. Prepare the standard solution.

9. If necessary, add the ISA/TISAB solution to the standard solution.

10. Thoroughly rinse the electrode with deionized water.

11. Immerse the electrode in the standard solution (complexing agent or precipitating agent).

12. Using <> <> and <MENU/ENTER>, enter the values for the volume of the standard solution (Std. volume), the concentration of the standard solution (Std. conc.) and the volume of the ISA/TISAB solu tion (ISA/TISAB vol.).

13. Select Continue with <> <> and start the measurement with <MENU/ENTER>. When the measurement is finished an entry window appears.

14. Add the sample to the standard (complexing agent or precipitating agent).

15. Using <> <> and <MENU/ENTER>, enter the value for the volume of the sample (Sample volume).

16. Select Continue with <> <> and start the measurement with <MENU/ENTER>. The measurement result is displayed when the measurement is completed.

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TruLab pH/ISE 1320 Ion concentration

ISE

0.321

24.8 °C

12.12.2012 12:12

Sample subtraction

mg/l

USB output

17. If necessary, start measuring further samples with <MENU/ENTER>. Repeat steps 8 - 16 for all samples.

18. Terminate the measuring method with <M>. A safety query appears.

19. Select Yes with <> <>.

20. Confirm Yes with <MENU/ENTER>. Measurement with the selected method is completed.

Calibration

8.3.5 Standard addition with blank value correction (Blank value

addition)

In the "Standard addition with blank value correction" procedure, a known amount of standard solution is added to the sample in two steps.

With the first addition, the ion concentration is raised to the linear range of the electrode characteristic curve.

The second addition is equivalent to the standard addition. The ion concentration in the sample is calculated from the change in potential.

1. Select the measuring method (see section 8.3 SELECTING THE MEASUR-

ING METHOD, page 53).

2. Prepare two standard calibration solutions.

3. Perform a two-point calibration according to user guidance.

4. The calibration record is displayed as soon as a stable value is achieved for the second standard calibration solution.

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Ion concentration TruLab pH/ISE 1320

CALIBRATION

12.12.2012 12:12:12 #1 0.010 mg/l 20.2 mV 25.0 °C #2 0.100 mg/l 79.2 mV 25.0 °C Slp.: 59.0 mV Sensor +++ (Ion type: Ag)

12.12.2012 12:12

Continue

USB output

Immerse sensor in sample

Sample volume 100.0 ml ISA/TISAB vol. 1.0 ml BV volume 100.0 ml BV conc. 1.000 mg/l Continue

Blank value addition

12.12.2012 12:12

Back

Add standard!

Std. volume 100.0 ml Std. conc. 1.0 mg/l Continue

Blank value addition

12.12.2012 12:12

Back

Measuring

5. Start the measurement with <F1> Continue An entry window appears.

6. Prepare the sample.

7. If necessary, add the ISA/TISAB solution to the sample.

8. Thoroughly rinse the electrode with deionized water.

9. Immerse the electrode in the sample that was supplemented with blank value solution.

10. Using <> <> and <MENU/ENTER>, enter the values for the volume of the sample (Sample volume), the volume of the ISA/TISAB solution (ISA/TISAB vol.), the volume of the blank value solution (BV volume) and the concentration of the blank value solution (BV conc.).

11. Select Continue with <> <> and start the measurement with <MENU/ENTER>. When the measurement is finished an entry window appears.

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TruLab pH/ISE 1320 Ion concentration

ISE

0.321

24.8 °C

12.12.2012 12:12

Blank value addition

mg/l

USB output

12. Add the standard solution to the sample.

13. Using <> <> and <MENU/ENTER>, enter the values for the vol-

ume of the standard solution (Std. volume) and concentration of the standard solution (Std. conc.).

14. Select Continue with <> <> and start the measurement with

<MENU/ENTER>. The measurement result is displayed when the measurement is completed.

15. If necessary, start measuring further samples with <MENU/ENTER>. Repeat steps 6 - 14 for all samples.

16. Terminate the measuring method with <M>. A safety query appears.

17. Select Yes with <> <>.

18. Confirm Yes with <MENU/ENTER>. Measurement with the selected method is completed.

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Settings TruLab pH/ISE 1320

9 Settings

9.1 Measurement settings

9.1.1 Settings for pH measurements

The settings for pH measurements are made in the menu for calibration and measurement settings of the pH/ORP measurement. To open the settings, dis play the required measured parameter in the measured value display and press the <MENU/ENTER> key. After completing the settings, switch to the measured value display with <M>.

In the following table, only those settings are listed that concern the pH measurement.

Default settings are printed in bold.

Menu item Possible set-

ting

Calibration /Calibration record

Calibration / Calibration data storage /Display

- Displays the calibration record of

- Displays the calibration record.

Description

the last calibration.

Further options:  Scroll through the calibration

records with <><>.

 Output the displayed calibration

record to the interface with <F2>/[USB output].

 Output all calibration records to

the interface with <F2__>[USB output].

 Quit the display with <F1>/

[Back] or <MENU/ENTER>.

 Switch directly to the measured

value display with <M>.

Calibration / Calibration data storage / Output to USB

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- Outputs the calibration records to the interface.

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TruLab pH/ISE 1320 Settings

Menu item Possible set-

ting

Calibration/

- Entry of the series number of the

Serial number (sensor)

Calibration /Buffer YSI

ConCal NIST/DIN ...

Calibration /One point calibration

Yes

Description

connected sensor. The series number is output in the calibration record.

 Change the contents of the high-

lighted position with <><>.

 Go to the next digit with <F2>/

[].

 After theseries number was

completely entered, confirm with <ENTER>.

Buffer sets to be used for pH calibration (see section 6.2 CALIBRA-

TION, page 31).

Quick calibration with 1 buffer

Calibration /Cali-

1 ... 7 ... 999 d Calibration interval for the pH elec-

bration interval

Calibration /Unit for slope

mV/pH

Man. temperature -25 ... +25 ...

+130

°C

Temperature unit °C

°F

Resolution pH 0.001

0.01

0.1

trode (in days). The meter reminds you to calibrate regularly by the flashing sensor symbol in the measuring screen.

Unit of the slope. The % display refers to the Nernst slope of -59.2

mV/pH (100 x deter-

mined slope/Nernst slope).

Entry of the manually determined temperature. For measurements without temperature sensor only.

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

Resolution of the pH display

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Settings TruLab pH/ISE 1320

Menu item Possible set-

Description

ting

Limit monitoring With the Limit monitoring function

you define the measured values whose exceeding is signaled. An acoustic signal sounds, and at the same time a message is output to the USB interface. You can switch on or off the acoustic signal in the System menu (see section 9.3.1 SYSTEM, page 75).

Limit monitoring/ pH monitoring

Limit monitoring/ TP monitoring

Limit monitoring/ pH monitoring/ On/ pH upper limit

Limit monitoring/ pH monitoring/ On/ pH lower limit

Off

Switch on or off the limit signaling device for the pH value.

Switch on or off the limit signaling device for the temperature value.

-2 ... 20 Upper limit. A message is output to the USB interface if it is exceeded. This menu item is only visible when the pH monitoring setting is active.

-2 ... 20 Lower limit. A message is output to the USB interface if it is exceeded. This menu item is only visible when the pH monitoring setting is active.

Limit monitoring/ TP monitoring/ On/ TP upper limit

Limit monitoring/ TP monitoring/ On/ TP lower limit

-5 ... +105 °C Upper limit. A message is output to the USB interface if it is exceeded. This menu item is only visible when the TP monitoring setting is active.

-5 ... 105 °C Lower limit. A message is output to the USB interface if it is exceeded. This menu item is only visible when the TP monitoring setting is active.

Reset - Resets all sensor settings to the

delivery condition (see

section

9.4.1 RESETTING THE MEASUREMENT

SETTINGS, page 76).

9.1.2 Buffer sets for calibration

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 consideration during the calibration.

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TruLab pH/ISE 1320 Settings

No. Buffer set * pH values at

1 YSI * 4.000

25 °C

7.000

10.000

2 ConCal Any Any

3 NIST/DIN

DIN buffers according to DIN 19266 and NIST Traceable Buffers

1.679

4.006

6.865

25 °C

9.180

12.454

4 TEC

WTW Technical buffers

2.000

4.010

25 °C

7.000

10.011

5 Merck 1* 4.000

20°C

7.000

9.000

6 Merck 2 * 1.000

20°C

6.000

8.000

13.000

7 Merck 3 * 4.660

6.880

9.220

8 Merck 4 * 2.000

4.000

7.000

10.000

9 Merck 5 * 4.010

7.000

10.000

10 DIN 19267 1.090

4.650

6.790

9.230

11 Mettler Toledo USA * 1.679

4.003

7.002

10.013

12 Mettler Toledo EU * 1.995

4.005

7.002

9.208

20°C

25 °C

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Settings TruLab pH/ISE 1320

No. Buffer set * pH values at

13 Fisher * 2.007

4.002

7.004

10.002

14 Fluka BS * 4.006

6.984

8.957

15 Radiometer * 1.678

4.005

7.000

9.180

16 Baker * 4.006

6.991

10.008

17 Metrohm * 3.996

7.003

8.999

18 Beckman * 4.005

7.005

10.013

25 °C

19 Hamilton Duracal * 4.005

7.002

10.013

20 Precisa * 3.996

7.003

8.999

21 Reagecon TEC * 2.000

4.010

7.000

10.000

22 Reagecon 20 * 2.000

4.000

7.000

10.000

13.000

25 °C

20°C

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TruLab pH/ISE 1320 Settings

No. Buffer set * pH values at

23 Reagecon 25 * 2.000

25 °C

4.000

7.000

10.000

13.000

24 Chemsolute * 2.000

20°C

4.000

7.000

10.000

25 USABlueBook * 4.000

25 °C

7.000

10.000

* Brand names or trade names are trademarks of their respective owners protected

by law.

The buffers are selected in the menu, pH / <MENU/ENTER> / Calibration / Buffer (see 9.1.1 SETTINGS FOR PH MEASUREMENTS, PAGE

66).

Setting the

calibration interval

9.1.3 Calibration interval

The calibration evaluation is displayed as a sensor symbol.

The sensor symbol flashes after the adjusted calibration interval has expired. It is still possible to measure.

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

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

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

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

<><>.

with

3. Confirm the setting with <ENTER>.

4. Quit the menu with <M>.

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Settings TruLab pH/ISE 1320

9.1.4 Settings for ORP measurements

The settings for ORP measurements are made in the menu for calibration and measurement settings of the pH/ORP measurement. To open the settings, dis play the required measured parameter in the measured value display and press the <MENU/ENTER> key. After completing the settings, switch to the measured value display with <M>.

In the following table, only those settings are listed that influence the ORP measurement.

Default settings are printed in bold.

Menu item Possible

Description

setting

Man. temperature -25 ... +25 ...

+130

°C

Entry of the manually determined temperature. For measurements without temperature sensor only.

Resolution mV 0.1

Resolution of the mV display

Reset - Resets all sensor settings to the

delivery condition (see

section 9.4.1

RESETTING THE MEASUREMENT SET-

TINGS, page 76).

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TruLab pH/ISE 1320 Settings

9.2 Settings for ISE measurements

The settings are made in the measuring menu of the ISE measurement. To open the settings, activate the relevant measuring window in the measured value display and press the <MENU/ENTER> key settings, switch to the measured value display with <M>.

The following settings are possible for ISE measurements:

Menu item Possible setting Description

shortly. After completing the

Calibration / Calibration record

Calibration / Calibration data storage / Display

- Displays the calibration

record of the last calibration.

- Displays the calibration record.

Further options:  Scroll through the cali-

bration records with <><>.

 Output the displayed cal-

ibration record to the interface with <F2>/[USB output].

 Output all calibration

records to the interface with <F2__>[USB out put].

 Quit the display with

<F1>/[Back] or <MENU/ ENTER>.

 Switch directly to the

measured value display with <M>.

Calibration / Calibration data stor-

- Outputs the calibration

records to the interface.

age / Output to USB

Calibration/ Serial number (sensor)

- Entry of the series number of the connected sensor. The series number is output in the calibration record.

 Change the contents of

the highlighted position with <><>.

 Go to the next digit with

<F2>/[].

 After theseries number

was completely entered, confirm with <ENTER>.

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Settings TruLab pH/ISE 1320

Menu item Possible setting Description

Man. temperature -25 ... +25 ... +130 °C Entry of the manually deter-

mined temperature. For measurements without tem

perature sensor only.

ISE setup / AutoRead criterion

ISE setup / Ion type

ISE setup / Unit

low medium

high

Ag, Br, Ca, Cd, Cl, CN, Cu, F, I, K, Na, NO3,

Selection of the AutoRead criteria (see

section 8.1.1

MEASURING THE ION CON-

CENTRATION, page 45).

Selection of the ion type to be measured.

Pb, S, NH3, NH4*, CO2, ION

An ion that is not included in the list can be measured with the setting, ION.

* Measuring with the NH 500 electrode:

The NH4 setting is not suitable for the gas-sensitive electrode NH 500. Select the following settings: Ion type "ION", Valency "-1".

mg/l µmol/l mg/kg ppm

Selection, with which unit the measurement result and calibration standards should be displayed.

ISE setup / Ion type / ION

Valency Molar mass

Set the valence (Valency) and molar weight (Molar

mass) for the ion.

ISE setup / Density

0.001 ... 9.999 g/ml or

kg/l

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

Method Standard addition

Standard subtraction

Selection of the available measuring methods.

Sample addition Sample subtraction Blank value addition

Start method Start measurement with the

selected method.

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TruLab pH/ISE 1320 Settings

9.3 Sensor-independent settings

9.3.1 System

To open the Storage & config menu, press the <MENU/ENTER__> key in the measured value display. After completing the settings, switch to the measured value display with <M>.

Default settings are printed in bold.

Menu item Possible set-

ting

System / General / Language

Deutsch

English

(further)

System / General / Beep

System / General / Illumination

Off

Auto

On Off

System / General /

0 ... 50 ... 100 %Changes the display contrast

Contrast

System / General /

10 min ... 1h ... 24 h

Switchoff time

System / General /

°C

°F

Temperature unit

Description

Selects the menu language

Switches on/off the beep on keystroke

Switches the display illumination on/off

Adjusts the switch-off time

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

System / General / Stability control

System / Interface / Baud rate

System / Interface / Output format

On Off

1200, 2400, 4800, 9600, 19200

ASCII

CSV

Switches on or off the automatic stability control during measurement

Baud rate of the data interface

Output format for data transmission (see section 11 TRANS-

MITTING DATA (USB INTERFACE),

page 84)

System / Interface / Decimal separator

System / Interface / Output header

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Dot (xx.x)

Comma (xx,x)

Decimal separator

Output of a header for Output format: CSV

Page 76

Settings TruLab pH/ISE 1320

Menu item Possible set-

Description

ting

System / Printer Settings for the integrated

printer of the TruLab

1320P.

ISE

pH/

For details, see section 4 PRINTER (ONLY TRULAB PH/ ISE 1320 P), page 14

System /Clock Date format

Datum Time

System /Service information

Time and date settings (see section 5.4.6 EXAMPLE 2 ON

NAVIGATION: SETTING THE DATE AND TIME, page 25)

Hardware version and software version of the meter are dis

played.

System /Reset - Resets the system settings to

the delivery condition (see

sec-

tion 9.4.2 RESETTING THE SYS-

TEM SETTINGS, page 77).

9.3.2 Data storage

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

section 10 DATA STORAGE, page 78).

9.4 Reset

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

9.4.1 Resetting the measurement settings

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

The following settings for pH measurements are reset to the default settings with the Reset function:

Setting Default settings

Buffer YSI

Calibration interval 7 d

Unit for slope mV/pH

Measured parameter pH

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TruLab pH/ISE 1320 Settings

Setting Default settings

Resolution pH 0.001

Resolution mV 0.1

Asymmetry 0 mV

Slope -59.2 mV

Man. temperature 25 °C

One point calibration No

Stability control On

Temperature unit °C

The sensor settings are reset under the Reset menu item in the menu for calibration and measurement settings. To open it in the measured value display, press the <MENU/ENTER> key.

9.4.2 Resetting the system settings

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

Setting Default settings

Language English

Beep On

Baud rate 4800 Baud

Output format ASCII

Decimal separator Dot (xx.x)

Contrast 50 %

Illumination Auto

Switchoff time 1 h

The system settings are reset in the menu, Storage & config / System / Reset. To open the Storage & config menu, press the <MENU/ENTER__> key in the measured value display.

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Data storage TruLab pH/ISE 1320

12.12.2012 11:24:16 pH 7.000 24.8 °C AR +++

ID number: 1 Continue

Manual data storage 4 von 200

12.12.2012 12:12

Back

10 Data storage

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

 Manual data storage (see section 10.1 MANUAL DATA STORAGE, page 78)

 Automatic storage at intervals (see section 10.2 AUTOMATIC DATA STORAGE

AT INTERVALS, page 79)

With each data storage process, the current datasets of the sensors indicated on the display are transmitted to the interface at the same time.

10.1 Manual data storage

You can transmit a measurement dataset to the data storage as follows. With each data storage process, the current datasets of the sensors indicated on the display are transmitted to the interface at the same time.

1. Press the <STO> key shortly. The menu for manual data storage appears.

If the storage is full The following window appears if all 200 storage locations are occupied:

78 ba76157e01 03/2014

2. If necessary, change and confirm the ID number (1 ... 10000) with <><> and <MENU/ENTER>. The dataset is stored. The meter switches to the measured value display.

Page 79

TruLab pH/ISE 1320 Data storage

Data storage full. Erase?

Yes No

Warning

12.12.2012 12:12

Back

ID number

Interval

30 s

Duration

180 min

Continue

0d03h00min

0 1d17h33min

Automatic data storage

12.12.2012 12:12

Back

You have the following options:

 To erase the entire 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

section

10.3.1 EDITING THE MEASUREMENT DATA STORAGE, page 81) and subsequently erase the data storage (see section 10.3.2 ERASING THE MEASURE-

MENT DATA STORAGE, page 83).

Configuring the

automatic storage

function

10.2 Automatic data storage at intervals

The storage interval (Interval) determines the time interval between automatic data storage processes. With each data storage process, the current datasets of the sensors indicated on the display are transmitted to the interface at the same time.

1. Press the <STO__> key. The menu for automatic data storage appears.

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1 Adjusted entire storage duration

2 Max. available storage duration

3 Graphical display of the storage usage

Page 80

Data storage TruLab pH/ISE 1320

6.949

25.0

°C

0d03h00min

12.12.2012 12:12

Eco mode

Settings You can configure the automatic data storage function with the following

settings:

Menu item Possible set-

ting

ID number 1 ... 10000 ID number for the dataset series.

Interval 1 s, 5 s, 10 s,

s, 1 min,

30 5

min,

30 60

min

Duration 1 min ... x min Storage duration.

Description

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.

Specifies after which time the automatic data storage should be terminated.

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

Starting the

automatic storage

function

To start the automatic storage function, select Continue with <><> and confirm with <MENU/ENTER>. The meter switches to the measured value dis play.

1 Remaining storage duration

2 Graphical display of the storage duration

The active automatic storage function can be recognized by the progress bar in the function display. The progress bar indicates the remaining storage dura tion.

If the automatic storage function is activated, only the following keys are active: Softkeys, <M>, <STO__> and <On/Off>. The

80 ba76157e01 03/2014

other keys and the automatic switch-off function are deactivated.

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TruLab pH/ISE 1320 Data storage

Stop automatic storage?

Yes No

Warning

12.12.2012 12:12

Back

Energy saving mode

([Eco mode])

Terminating the

automatic storage

function

prematurely

If the automatic storing function is active, the meter provides an energy saving mode ([Eco mode]) to avoid unnecessary energy consumption. The energy saving mode switches off functions of the meter that are not required for the automatic storage of measurement data (such as the display). By pressing any key the energy saving mode is switched off again.

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

1. Press the <STO__> key. The following window appears.

Editing the data

storage

2. Using <><>, select Yes and confirm with <MENU/ENTER>. The meter switches to the measured value display. The automatic data storage function is terminated.

10.3 Measurement data storage

10.3.1 Editing the measurement data storage

The contents of the manual or automatic measurement data storage can be shown on the display and output to the interface.

Each of the measurement data storages has a function to erase the entire contents.

The storage is edited in the menu, Storage & config / Data storage. To open the Storage & config menu, press the <MENU/ENTER__> key in the measured value display.

Open the manual or automatic storage directly with the <RCL> or <RCL__> key.

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

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Data storage TruLab pH/ISE 1320

Manual data storage 3 of 64

12.12.2012 11:24:16 ID number: 2

pH 7.000 24.8 °C AR +++

12.12.2012 12:12

Back

USB output

12.12.2012 09:56:20 TruLab pH/ISE 1320 Ser. no. 08502113

ID number 2

pH1 6.012 24.8 °C, AR, S: +++ pH2 6.056 24.8 °C, AR, S: +++ ________________________________________

12.12.2012 10:56:20 TruLab pH/ISE 1320 Ser. no. 08502113

ID number 2

pH1 6.012 24.8 °C, AR, S: +++ pH2 6.056 24.8 °C, AR, S: +++ ________________________________________

Settings

Menu item Setting/

function

Data storage /

- Displays all measurement datasets Manual data storage / Display

Data storage /

- Erases the entire manual meaManual data storage / Erase

Data storage /

- Outputs all stored measurement Manual data storage / Output to USB

Description

page by page.

Further options:  Scroll through the datasets with

<><>.

 Output the displayed dataset to

the interface with <F2>/[USB output].

 Quit the display with <F1>/

[Back].

surement data storage. All calibration data remain stored when this action is performed.

data to the interface.

Display presentation

of a dataset

Representation of a

(USB output)

dataset

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TruLab pH/ISE 1320 Data storage

Quitting the display To quit the display of stored measurement datasets, you have the following

options:

 Switch directly to the measured value display with <M>.

 Quit the display and move to the next higher menu level with <F1>/[Back].

10.3.2 Erasing the measurement data storage

Erasing the measurement data storage (see section 10.3.1 EDITING THE

MEASUREMENT DATA STORAGE, page 81).

10.3.3 Measurement dataset

A complete dataset includes:

 ID number

 Date/time

 Measured values of the connected sensors

 Measured temperature value of the connected sensors or manually set tem-

perature

 AutoRead info: The AR indicator appears with the measured value if the

AutoRead criterion was met while storing (stable measured value). Other

wise, there is no AR indicator.

 Calibration evaluation: +++, ++, +, -, or no evaluation

10.3.4 Storage locations

The TruLab pH/ISE 1320 meter has two measurement data storages. The measured values recorded either manually or automatic are stored separately in individual measurement data storages.

Storage Maximum number of datasets

Manual data storage 200

Automatic data storage 5000

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TruLab pH/ISE 1320 Transmitting data (USB interface)

11 Transmitting data (USB interface)

11.1 Options for data transmission

Via the USB interface you can transmit data to a PC. The following table shows which data are transmitted to the interface in which way:

Data Control Operation / description

Current datasets of the sensors indicated on the display

Stored measured values

Manual  With <F2>/[USB output].

 Simultaneously with every manual

data storage process (see

section

10.1 MANUAL DATA STORAGE, page

78).

Automatic, at intervals

 With <F2__>/[USB output].

Then you can set the transmission interval.

 Simultaneously with every auto-

matic data storage process (see section 10.2 AUTOMATIC DATA

STORAGE AT INTERVALS, page 79).

Manual  Displayed dataset with <F2>[USB

output] after calling up from the storage.

 All datasets with the Output to USB

function. (see section 10.3.1 EDITING THE

MEASUREMENT DATA STORAGE,

page 81).

Calibration records

The following rule applies: With the exception of the menus, shortly pressing the <F2>[USB output] key generally outputs the display contents to the interface (displayed measured values, measure ment datasets, calibration records).

Manual  Calibration record with <F2>/[USB

output] (see section 6.2.6 CALIBRATION

DATA, page 38).

Automatic  At the end of a calibration proce-

dure.

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TruLab pH/ISE 1320 Transmitting data (USB interface)

11.2 Connecting a PC

Connect the TruLab pH/ISE 1320 to the PC via the USB interface.

NOTE

When connecting an earthed PC/printer, measurements cannot be performed in earthed media as the values would be incorrect. The USB interface is not galvanically isolated.

Installation of the

USB driver on the

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 XP, Windows 7.

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

2. Install the driver from the CD. Follow the Windows installation instructions as necessary.

3. Connect the TruLab pH/ISE 1320 to the PC via the USB interface. The meter is listed as a virtual COM interface among the connections in the Windows instrument manager.

11.3 MultiLab Importer

With the aid of the MultiLab Importer software, you can record and evaluate measurement data with a PC.

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

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Transmitting data (USB interface) TruLab pH/ISE 1320

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TruLab pH/ISE 1320 Maintenance, cleaning, disposal

12 Maintenance, cleaning, disposal

12.1 Maintenance

12.1.1 General maintenance activities

The only maintenance activity required is replacing the batteries.

See the relevant operating manuals of the electrodes for instructions on maintenance.

12.1.2 Replacing 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.

1 Battery compartment

1. Open the battery compartment (1) on the underside of the meter.

2. Remove the four batteries from the battery compartment.

3. Place four new batteries (type Mignon AA) in the battery compartment.

CAUTION

Make sure that the poles of the batteries are positioned correctly. The ± signs on the batteries must correspond to the ± signs in the battery compartment.

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Maintenance, cleaning, disposal TruLab pH/ISE 1320

4. Close the battery compartment (1).

5. Set the date and time (see section 5.4.6 EXAMPLE 2 ON NAVIGATION: SETTING THE DATE AND TIME, page 25)

When the batteries are nearly discharged, the status indicator is displayed.

Dispose of used batteries according to the local regulations of your country.

End users within the European Union are obligated to return used batteries (even ecologically compatible ones) to a collection point set up for recycling purposes.

Batteries are marked with the crossed-out waste container symbol. Therefore, they may not be disposed with the domestic waste.

12.2 Cleaning

Occasionally wipe the outside of the measuring instrument with a damp, lintfree cloth. Disinfect the housing with isopropanol as required.

CAUTION

The housing is made of synthetic material (ABS). Thus, avoid contact with acetone or similar detergents that contain sol vents. Remove any splashes immediately.

12.3 Packing

This meter is sent out in a protective transport packing. We recommend: Keep the packing material. The original packing protects the meter against damage during transport.

12.4 Disposal

At the end of its operational lifetime, the meter must be returned to the disposal or return system statutory in your country. If you have any questions, please contact your supplier.

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TruLab pH/ISE 1320 What to do if...

13 What to do if...

13.1 pH/ORP

More information and instructions on cleaning and exchange of sensors are given in the documentation of your sensor.

Error message

OFL, UFL

Error message,

Error

The measured value is outside the measuring range.

Cause Remedy

pH electrode:

– Air bubble in front of the junction – Remove air bubble

– Air in the junction – Extract air or moisten junction

– Cable broken – Replace electrode

– Gel electrolyte dried out – Replace electrode

– Measured value outside the mea-

suring range

Cause Remedy

pH electrode:

– The values determined for zero

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

– Use suitable electrode

– Recalibrate

– Junction contaminated – Clean junction

– Electrode broken – Replace electrode

Buffer solutions:

– Wrong buffer solutions – Change calibration procedure

– Buffer solutions too old – Use only once.

Note the shelf life

– Buffer solutions depleted – Change solutions

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What to do if... TruLab pH/ISE 1320

No stable measured

Cause Remedy

value

pH electrode:

– Junction contaminated – Clean the junction

– Membrane contaminated – Clean the membrane

Test sample:

– pH value not stable – Measure with air excluded if

necessary

– Temperature not stable – Temper if necessary

Electrode + test sample:

– Conductivity too low – Use a suitable electrode

Obviously incorrect

measured values

– Temperature too high – Use a suitable electrode

– Organic liquids – Use a suitable electrode

Cause Remedy

pH electrode:

– pH electrode unsuitable – Use a suitable electrode

– Temperature difference between

buffer and test sample too great

– Measurement procedure not suit-

– Adjust the temperature of buf-

fer or sample solutions

– Follow a special procedure

able

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TruLab pH/ISE 1320 What to do if...

13.2 ISE

Error message OFL

Obviously incorrect

measured values

Error message,

Error (invalid

calibration)

Cause Remedy

– Measuring range exceeded – Dilute the test sample

Cause Remedy

– Electrode not connected – Connect the electrode

– Cable broken – Replace the electrode

Cause Remedy

ISE electrode:

– Moisture in the plug – Dry the plug

– Electrode obsolete – Replace the electrode

– Electrode not suitable for the range

– Use a suitable electrode

to be measured

– Electrode not suitable for the

selected ion

– Use a suitable electrode or

select a suitable ion

Warning [TpErr]

Warning [ISEErr]

– The gas-sensitive electrode NH 500

was calibrated with the NH4 setting

– Select the following settings:

Ion type "ION", Valency "-1"

– Socket damp – Dry the socket

Calibration procedure:

– Wrong sequence of standards for

– Select the correct sequence

three point calibration

– Calibration standards do not have

the correct temperature (max.

± 2 °C

– Adjust the temperature of the

calibration standards

temperature difference)

Cause Remedy

– Temperature difference between

measurement and calibration greater than 2

– Adjust the temperature of the

test sample

Cause Remedy

– Electrode voltage outside calibrated

– Recalibrate

range

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What to do if... TruLab pH/ISE 1320

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TruLab pH/ISE 1320 What to do if...

13.3 General information

Sensor symbol

flashes

display

Meter does not react

to keystroke

You want to know

which software

version is in the

meter

Cause Remedy

– Calibration interval expired – Recalibrate the measuring

Cause Remedy

– Batteries almost empty – Replace the batteries (see

Cause Remedy

– Operating condition undefined or

EMC load unallowed

Cause Remedy

– E. g., a question by the service

department

system

section 12.1 MAINTENANCE, page 87)

– Processor reset:

Press the <ENTER> and <On/ Off> key simultaneously

– Switch on the meter.

Open the menu, <ENTER_> /

Storage & config / System / Service information. The

instrument data are displayed.

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Technical data TruLab pH/ISE 1320

14 Technical data

14.1 Measuring ranges, resolution, accuracy

14.1.1 pH/ORP

Measuring ranges, resolution

Parameter Measuring range Resolution

pH -2.0 ... +20.0 0.1

-2.00 ... +20.00 0.01

- 2.000 ... + 19.999 0.001

U [mV] -1200.0 ... +1200.0 0.1

-2500 ... +2500 1

T [°C] -5.0 ... +105.0 0.1

T [°F] 23.0 ... +221.0 0.1

Manual temperature input

Parameter Range Increment

[°C] -25 ... +130 1

manual

[°F] -13 ... +266 1

manual

Accuracy (± 1 digit) Parameter Accuracy Temperature of the test

sample

pH / range *

-2.0 ... +20.0 ± 0.1 +15 °C ... +35 °C

-2.00 ... +20.00 ± 0.01 +15 °C ... +35 °C

- 2.000 ... + 19.999 ± 0.005 +15 °C ... +35 °C

U [mV] / range

-2500 ... +2500 ± 1 +15 °C ... +35 °C

-1200.0 ... +1200.0 ± 0.3 +15 °C ... +35 °C

T [°C] / temperature sensor

NTC 30 ± 0.1

PT 1000 ± 0.1

* when measuring in a range of ± 2 pH around a calibration point

The accuracy values specified here apply exclusively to the meter. The accuracy of the electrodes and buffer solutions has to be taken into account additionally.

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TruLab pH/ISE 1320 Technical data

14.1.2 ISE

Measuring ranges, resolution

Parameter Measuring range Resolution

ISE [mg/l] 0.000 ... 9.999

10.00 ... 99.99

100.0 ... 999.9 1000 ... 999999

ISE [µmol/l] 0.000 ... 9.999

10.00 ... 99.99

100.0 ... 999.9 1000 ... 9999

0.001

0.01

0.1 1

0.001

0.01

0.1 1

[mmol/l] 1000 ... 999999 1

ISE [mg/kg] 0.000 ... 9.999

10.00 ... 99.99

100.0 ... 999.9 1000 ... 999999

ISE [ppm] 0.000 ... 9.999

10.00 ... 99.99

100.0 ... 999.9 1000 ... 999999

ISE [%] 0.000 ... 9.999

10.00 ... 99.99

100.0 ... 999.9 1000 ... 999999

0.001

0.01

0.1 1

0.001

0.01

0.1 1

0.001

0.01

0.1 1

Manual temperature input

Parameter Range Increment

[°C] - 20 ... + 130 1

manual

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Technical data TruLab pH/ISE 1320

14.2 General data

Dimensions TruLab pH/ISE 1320: Approx. 230 x 190 x 80 mm

TruLab pH/ISE 1320 P:Approx. 280 x 230 x 80 mm

Weight TruLab pH/ISE 1320: Approx. 0.8 kg

TruLab pH/ISE 1320 P:Approx. 1.0 kg

Mechanical structure Type of protection IP 43

Electrical safety Protective class III

Test certificates CE, cETLus

Ambient conditions

Power supply

Storage -25 °C ... +65 °C

Operation +5 °C ... +55 °C

With the power pack connected: +5 °C ... +40 °C

Admissible relative humidity

Yearly mean: < 75 % 30 days/year: 95 % Other days: 85 %

Batteries 4 x 1.5 V alkali-manganese batteries, type

Rechargeable batteries

4 x 1.2 V NiMH rechargeable batteries,

type (no charging function)

Operational life Up to 1000 h without / 150 h with illumination

Power pack Kuantech Co. Ltd. KSAC 0900110W1UV-1

Input: 100 ... 240 V ~ / 50 ... 60 Hz / 270 mA Output: 9 V = / 1.1 A Connection max. overvoltage category II Primary plugs contained in the scope of delivery: Euro, US, UK and Australian.

Sensor input Input resistance > 5 * 1012 ohm

Input current < 1 * 10

-12

USB interface Type USB 1.1

USB B (device), data output

Baud rate Adjustable:

1200, 2400, 4800, 9600, 19200 Baud

Data bits 8

Stop bits 2

Parity None

Handshake RTS/CTS

Cable length Max. 3 m

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TruLab pH/ISE 1320 Technical data

FCC Class A Equipment Statement

Note: This equipment has been tested and found to comply with the limits for a Class A digital device, pursuant to Part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference when the equipment is operated in a commercial environment. This equipment generates, uses, and can radiate radio frequency energy and, if not installed and used in accordance with the instruction manual, may cause harmful interference to radio communications. Operation of this equipment in a residential area is likely to cause harmful interference in which case the user will be required to correct the interference at his own expense. Changes or modifications not expressly approved by the manufacturer could void the user‘s authority to operate the equipment.

Applicable directives and standards

EMC EC directive 2004/108/EC

EN 61326-1 EN 61000-3-2 EN 61000-3-3 FCC Class A

Meter safety EC directive 2006/95/EC

EN 61010-1 UL 61010-1 CAN/CSA-C22.2#61010-1

IP protection class EN 60529

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Firmware update TruLab pH/ISE 1320

15 Firmware update

Available firmware updates are provided on the Internet. With the firmware update program and a PC you can update the firmware of the TruLab

For the update you have to connect the meter to a PC.

For the update via the USB interface, the following is required:

 a free USB interface (virtual COM port) on the PC

 the driver for the USB interface (on the enclosed CD-ROM)

 the USB cable (included in the scope of delivery of the TruLab pH/

1. Install the downloaded firmware update on a PC.

pH/ISE 1320 to the newest version.

1320).

ISE

An update folder is created in the Windows start menu. If an update folder already exists for the meter (or meter type), the new data is displayed there.

2. In the windows start menu, open the update folder and start the firmware

update program.

3. Using the USB interface cable, connect the TruLab pH/ISE 1320 to a

USB interface (virtual COM port) of the PC.

4. Switch on the TruLab pH/ISE 1320.

5. In the firmware update program, start the update process with OK.

6. Follow the instructions of the firmware update program.

During the programming process, a corresponding message and a progress bar (in %) are displayed. The programming process takes approx. three minutes. A terminatory message is displayed after a successful programming process. The firmware update is completed.

7. Disconnect the TruLab pH/ISE 1320 from the PC.

The TruLab pH/ISE 1320 is ready for operation again.

After switching the meter off and on you can check whether the meter has taken over the new software version (see

VERSION IS IN THE METER, PAGE 93).

YOU WANT TO KNOW WHICH SOFTWARE

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TruLab pH/ISE 1320 Glossary

16 Glossary

pH/ORP/ISE

Asymmetry see zero point

Electromotive force of

a electrode

Junction The junction is a porous body in the housing wall of reference elec-

ORP voltage The ORP is caused by oxidizing or reducing substances dissolved in

pH value The pH value is a measure of the acidic or basic effect of an aqueous

Potentiometry Name of a measuring technique. The signal (depending on the mea-

Slope The slope of a linear calibration function.

The electromotive force U of the electrode is the measurable electromotive force of an electrode in a solution. It equals the sum of all the galvanic voltages of the electrode. Its dependency on the pH results in the electrode function, which is characterized by the parameters, slope and zero point.

trodes or electrolyte bridges. It arranges the electrical contact between two solutions and makes the electrolyte exchange more difficult. The expression, junction, is also used for ground or junction-less transitions.

water if these substances become effective on an electrode surface (e. g. a gold or platinum surface).

solution. It corresponds to the negative decadic logarithm of the molal hydrogen ions activity divided by the unit of the molality. The practical pH value is the value of a pH measurement.

sured parameter) of the electrode is the electrical potential. The electrical current remains constant.

Zero point The zero point of a pH electrode is the pH value at which the electromo-

tive force of the pH electrode at a specified temperature is zero. Normally, this is at 25 °C.

General information

Adjusting To manipulate a measuring system so that the relevant value (e. g. the

displayed value) differs as little as possible from the correct value or a value that is regarded as correct, or that the difference remains within the tolerance.

AutoRange Name of the automatic selection of the measuring range.

Calibration Comparing the value from a measuring system (e. g. the displayed

value) to the correct value or a value that is regarded as correct. this expression is also used when the measuring system is adjusted at the same time (see adjusting).

Channel A channel is a display indication that corresponds to a physical connec-

tion on the meter.

Measured parameter The measured parameter is the physical dimension determined by

measuring, e. g. pH, conductivity or D.O. concentration.

Often,

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Glossary TruLab pH/ISE 1320

Measured value The measured value is the special value of a measured parameter to be

determined. It is given as a combination of the numerical value and unit (e. g.

3 m; 0.5 s; 5.2 A; 373.15 K).

Molality Molality is the quantity (in Mol) of a dissolved substance in 1000 g sol-

vent.

Reset Restoring the original condition of all settings of a measuring system.

Resolution Smallest difference between two measured values that can be dis-

played by a meter.

Stability control (Au-

Function to control the measured value stability.

toRead )

Standard solution The standard solution is a solution where the measured value is known

by definition. It is used to calibrate a measuring system.

Temperature function Name of a mathematical function expressing the temperature behavior

of a test sample, a sensor or part of a sensor.

Test sample Designation of the test sample ready to be measured. Normally, a test

sample is made by processing the original sample. The test sample and original sample are identical if the test sample was not processed.

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