wtw inoLab 740 User manual

ba75446e05 07/2010
inoLab 740
with terminal 740
Operating manual
inoLab 740
measuring system with
active multifunction boxes
and 740 terminal
AR
RUN
ENTER
inoLab
Cond
730

inoLab 740
2ba75446e05 07/2010
Accuracy when
going to press
The use of advanced technology and the high quality standard of our
instruments are the result of continuous development. This may result
in differences between this operating manual and your instrument.
Also, we cannot guarantee that there are absolutely no errors in this
manual. Therefore, we are sure you will understand that we cannot
accept any legal claims resulting from the data, figures or descriptions.
Warranty We guarantee the instrument described for 3 years from the date of
purchase.
The instrument warranty covers manufacturing faults that are
discovered within the warranty period.
The warranty does not cover components that are replaced during
maintenance work, e. g. batteries.
The warranty claim extends to restoring the instrument to readiness for
use but not, however, to any further claim for damages. Improper
handling or unauthorized opening of the instrument invalidates any
warranty claim.
To ascertain the warranty liability, return the instrument and proof of
purchase together with the date of purchase freight paid or prepaid.
Copyright ©Weilheim 2010, WTW GmbH
Reprinting - even as excerpts - is only allowed with the explicit written
authorization of WTW GmbH, Weilheim.
Printed in Germany.

inoLab 740 Contents
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inoLab 740 - Contents
1 Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
1.1 Measuring module. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
1.2 Terminal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
1.2.1 Display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
1.2.2 Keys . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
1.2.3 Sockets on the terminal . . . . . . . . . . . . . . . . . . . 13
1.2.4 Firmware . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
2 Safety . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
2.1 Authorized use . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
2.2 General safety instructions . . . . . . . . . . . . . . . . . . . . . . . 16
3 Commissioning. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
3.1 Scope of delivery. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
3.2 Preparing the inoLab 740 measuring system . . . . . . . . . 20
3.3 Switching on the measuring system . . . . . . . . . . . . . . . . 25
3.4 Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
3.5 Updating the terminal software (firmware) . . . . . . . . . . . 27
3.5.1 Checking the version no. of the terminal
firmware . . . . . . . . . . . . . . . . . . . . . . . . . . 27
3.5.2 Starting the update of the terminal firmware . . . 28
4 Basic principles of operation. . . . . . . . . . . . . . . . . . . . 31
4.1 Display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
4.1.1 Status display indicators . . . . . . . . . . . . . . . . . . 32
4.1.2 Softkey functions . . . . . . . . . . . . . . . . . . . . . . . . 34
4.1.3 Symbols in the Menu mode . . . . . . . . . . . . . . . . 35
4.1.4 Display of measured values . . . . . . . . . . . . . . . . 36
4.2 Keys . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
4.2.1 Keys on the terminal . . . . . . . . . . . . . . . . . . . . . 39
4.2.2 Keys on the measuring module . . . . . . . . . . . . . 40
4.2.3 IBM PC keyboard . . . . . . . . . . . . . . . . . . . . . . . . 41
4.2.4 Barcode reader . . . . . . . . . . . . . . . . . . . . . . . . . 42
4.3 Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
4.4 Output of measured data . . . . . . . . . . . . . . . . . . . . . . . . 46
4.4.1 Measured data display on the screen . . . . . . . . 46
4.4.2 Measured data output on the integrated printer . 47
4.4.3 Outputting measured data to the
RS232/REC interface. . . . . . . . . . . . . . . . . . . . . 47

Contents inoLab 740
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5 System settings. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
5.1 Date and time . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
5.2 Changing the language . . . . . . . . . . . . . . . . . . . . . . . . . . 50
5.3 Display settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
5.3.1 Display contrast . . . . . . . . . . . . . . . . . . . . . . . . . 51
5.3.2 Display illumination . . . . . . . . . . . . . . . . . . . . . . . 52
5.4 Acoustic signals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53
5.5 Temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54
5.5.1 Temperature unit . . . . . . . . . . . . . . . . . . . . . . . . 54
5.5.2 Measuring the temperature. . . . . . . . . . . . . . . . . 55
5.6 User profiles. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57
5.6.1 Opening the Administration menu . . . . . . . . . . . 59
5.6.2 Opening the Administration window . . . . . . . . . . 59
5.6.3 Creating, editing, or deleting a user profile . . . . . 60
5.6.4 Printing the list of user profiles . . . . . . . . . . . . . . 61
5.7 Password for user names . . . . . . . . . . . . . . . . . . . . . . . . 62
5.7.1 Changing the password . . . . . . . . . . . . . . . . . . . 62
5.7.2 Assigning a password. . . . . . . . . . . . . . . . . . . . . 63
5.7.3 Forgotten the password? . . . . . . . . . . . . . . . . . . 63
5.8 Modules . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64
6 pH . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67
6.1 Settings for pH . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67
6.1.1 Displaying pH/ISE or measured voltage values . 67
6.1.2 Setting the pH display. . . . . . . . . . . . . . . . . . . . . 67
6.1.3 Measured value resolution of voltage display. . . 68
6.1.4 Measured value resolution of pH display . . . . . . 69
6.1.5 Resetting to default settings . . . . . . . . . . . . . . . . 70
6.2 Calibrating pH measurements . . . . . . . . . . . . . . . . . . . . . 71
6.2.1 Buffer sets. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73
6.2.2 Calibration settings . . . . . . . . . . . . . . . . . . . . . . . 74
6.2.3 Calibration. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 77
6.3 Measuring the pH value. . . . . . . . . . . . . . . . . . . . . . . . . . 83
6.4 Measuring the ORP voltage. . . . . . . . . . . . . . . . . . . . . . . 85
7 Ion concentration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 87
7.1 Settings for ISE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 87
7.1.1 Displaying pH/ISE or measured voltage values . 87
7.1.2 Setting up the ISE display . . . . . . . . . . . . . . . . . 87
7.1.3 Determining the measuring range . . . . . . . . . . . 88
7.1.4 Measured value resolution of voltage display. . . 89
7.1.5 Resetting to default settings . . . . . . . . . . . . . . . . 89
7.2 Advanced settings for ISE . . . . . . . . . . . . . . . . . . . . . . . . 90
7.2.1 Units of the ISE display. . . . . . . . . . . . . . . . . . . . 90
7.2.2 Blank value correction (Bw Corr) . . . . . . . . . . . . 91
7.2.3 Reference measurement (Ref Meas) . . . . . . . . . 92
7.2.4 Criterion for AutoRead (AutoRead). . . . . . . . . . . 93

inoLab 740 Contents
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7.3 Calibration for ion-selective measurements . . . . . . . . . . 94
7.3.1 Two-point and three-point calibration. . . . . . . . . 97
7.3.2 Four-point to six-point calibration . . . . . . . . . . . 100
7.4 Measuring the ion concentration . . . . . . . . . . . . . . . . . . 102
7.4.1 Select the measuring method . . . . . . . . . . . . . 103
7.4.2 Standard Addition (Std Add) . . . . . . . . . . . . . . 105
7.4.3 Double Standard Addition (Std Add ++). . . . . . 107
7.4.4 Standard Subtraction (Std Sub) . . . . . . . . . . . 109
7.4.5 Sample Addition (Smp Add) . . . . . . . . . . . . . . 111
7.4.6 Sample Subtraction (Smp Sub). . . . . . . . . . . . 113
7.4.7 Standard addition with blank value
correction (Bw Add) . . . . . . . . . . . . . . . . . . . . . 116
8 Dissolved oxygen (D. O.) . . . . . . . . . . . . . . . . . . . . . . 119
8.1 Settings for D. O. measurements . . . . . . . . . . . . . . . . . 119
8.1.1 Determining the measuring range . . . . . . . . . . 119
8.1.2 Displaying the air pressure. . . . . . . . . . . . . . . . 120
8.1.3 Salinity correction. . . . . . . . . . . . . . . . . . . . . . . 120
8.1.4 Resetting to default settings. . . . . . . . . . . . . . . 122
8.2 Calibrating for D. O. measurements . . . . . . . . . . . . . . . 123
8.2.1 Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 125
8.2.2 Calibrating with the air calibration vessel . . . . . 126
8.2.3 Calibrating via a comparison measurement . . 127
8.3 Measuring the D. O. content . . . . . . . . . . . . . . . . . . . . . 128
8.3.1 Selecting the measured value display . . . . . . . 129
8.3.2 Drift control (AutoRead) . . . . . . . . . . . . . . . . . . 130
9 BOD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 132
9.1 General information. . . . . . . . . . . . . . . . . . . . . . . . . . . . 132
9.1.1 Operation with the StirrOx G oxygen sensor . . 133
9.1.2 Operation with a barcode reader . . . . . . . . . . . 133
9.2 BOD measurement . . . . . . . . . . . . . . . . . . . . . . . . . . . . 134
9.2.1 Procedure. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 134
9.2.2 Start measurement. . . . . . . . . . . . . . . . . . . . . . 134
9.2.3 Stopping the BOD measurement . . . . . . . . . . . 140
9.2.4 End measurement . . . . . . . . . . . . . . . . . . . . . . 140
9.3 BOD result. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 144
9.3.1 Displaying, editing and printing the
measurement result . . . . . . . . . . . . . . . . . . . . . 144
9.3.2 Deleting BOD measurement results. . . . . . . . . 147
9.4 Routines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 148
9.4.1 Setting up routines . . . . . . . . . . . . . . . . . . . . . . 148
9.4.2 Starting a measurement with routine . . . . . . . . 149
9.4.3 Deleting routines . . . . . . . . . . . . . . . . . . . . . . . 149

Contents inoLab 740
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10 Conductivity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 151
10.1 Settings for conductivity measurements . . . . . . . . . . . . 151
10.1.1 Determining the measuring range . . . . . . . . . . 151
10.1.2 Entering the reference temperature . . . . . . . . . 152
10.1.3 Displaying the conductivity or specific
resistance . . . . . . . . . . . . . . . . . . . . . . . . 153
10.1.4 Setting the temperature compensation. . . . . . . 154
10.1.5 Reset (Reset) . . . . . . . . . . . . . . . . . . . . . . . . . . 155
10.2 Determining/setting up the cell constant . . . . . . . . . . . . 156
10.2.1 Determining the cell constant (calibration) . . . . 156
10.2.2 Setting the cell constant . . . . . . . . . . . . . . . . . . 159
10.3 Measuring the conductivity . . . . . . . . . . . . . . . . . . . . . . 163
10.3.1 General information . . . . . . . . . . . . . . . . . . . . . 163
10.3.2 Displaying the conductivity, dry filtrate
residue or salinity . . . . . . . . . . . . . . . . . . . . . . . 163
10.3.3 Drift control (AutoRead) . . . . . . . . . . . . . . . . . . 164
11 Data storage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 167
11.1 Storage of measurement data records . . . . . . . . . . . . . 167
11.1.1 Saving individual measurement data records. . 168
11.1.2 Automatically storing measurement data
records . . . . . . . . . . . . . . . . . . . . . . . . . . 169
11.1.3 Displaying stored measurement data records . 172
11.1.4 Deleting stored measurement data records . . . 176
11.2 Storage of system configurations . . . . . . . . . . . . . . . . . 178
11.2.1 Saving the system configuration. . . . . . . . . . . . 178
11.2.2 Recalling a system configuration . . . . . . . . . . . 179
11.2.3 Deleting a system configuration . . . . . . . . . . . . 180
11.3 Storage of calibration records . . . . . . . . . . . . . . . . . . . . 181
12 Data output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 183
12.1 Data output to the display . . . . . . . . . . . . . . . . . . . . . . . 184
12.1.1 Numerical display . . . . . . . . . . . . . . . . . . . . . . 184
12.1.2 Graphical display . . . . . . . . . . . . . . . . . . . . . . . 185
12.2 Outputting data to the integrated printer . . . . . . . . . . . . 189
12.2.1 General information . . . . . . . . . . . . . . . . . . . . . 189
12.2.2 Switching on the integrated printer . . . . . . . . . 190
12.2.3 Data output to the integrated printer . . . . . . . . 190
12.2.4 Printing. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 190
12.3 Outputting data to an external printer/PC . . . . . . . . . . . 194
12.3.1 Outputting data to the RS232/REC interface . . 195
12.3.2 Setting the baud rate . . . . . . . . . . . . . . . . . . . . 195
12.3.3 Determining the data format . . . . . . . . . . . . . . 196
12.3.4 Setting the print interval . . . . . . . . . . . . . . . . . . 198
12.3.5 Outputting data to an external printer or PC . . 199
12.4 Outputting data to the external recorder . . . . . . . . . . . . 199

inoLab 740 Contents
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13 Maintenance, cleaning, disposal. . . . . . . . . . . . . . . . 201
13.1 Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 201
13.1.1 Replacing the batteries . . . . . . . . . . . . . . . . . . 201
13.1.2 Changing the roll of paper. . . . . . . . . . . . . . . . 202
13.1.3 Maintenance of the probes. . . . . . . . . . . . . . . . 202
13.2 Cleaning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 203
13.3 Disposal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 203
14 What to do if... . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 205
14.1 Terminal messages. . . . . . . . . . . . . . . . . . . . . . . . . . . . 205
14.2 Printer messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 206
14.3 pH/voltage system messages . . . . . . . . . . . . . . . . . . . 207
14.4 Ion concentration system messages . . . . . . . . . . . . . . 209
14.5 Oxygen system messages . . . . . . . . . . . . . . . . . . . . . . 211
14.6 Conductivity system messages . . . . . . . . . . . . . . . . . . 213
15 Technical data. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 215
15.1 Terminal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 217
15.2 Measuring module. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 220
15.3 pH/electromotive force of the electrode: . . . . . . . . . . . . 221
15.4 Ion concentration. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 223
15.5 Dissolved oxygen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 224
15.6 Conductivity. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 226
16 Lists . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 229
16.1 Abbreviations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 230
16.2 Glossary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 232
16.3 Index . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 237

Contents inoLab 740
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inoLab 740 Overview
9
ba75446e05 07/2010
1 Overview
The inoLab 740 measuring system is suitable for operating with an
inoLab 740 terminal and also with a PC.
This manual contains a description of the operation of inoLab 740 with
terminal.
Note
The operation of inoLab 740 measuring modules on the PC with the
MultiLab pilot software is described in a separate operating manual.
The newest software version of MultiLab pilot is available on the
Internet under http://www.wtw.com.
Note
Information on other accessories is given in the WTW catalog,
LABORATORY AND FIELD INSTRUMENTATION, or is available via the
Internet.
AR
RUN
ENTER
inoLab
Cond
730
Terminal Measuring module (active
multifunction box)

Overview inoLab 740
10 ba75446e05 07/2010
1.1 Measuring module
The inoLab 740 measuring system works together with the following
inoLab 740 active multifunction boxes:
pH, pH/ION, Oxi, BSB/BOD, Cond, pH/Cond and Multi.
Each inoLab 740 measuring module has its own fixed software in order
to process the probe signals and to communicate with the terminal.
A detailed description of the operating elements on the measuring
module can be found in chapter 4 BASIC PRINCIPLES OF OPERATION.
Measuring module