SCHOTT ProLab 4000 User manual

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DRAFT December 10, 2012 1:25 pm
ProLab 4000
Operating manual
pH/ISE/Conductivity measuring instrument
with automatic sensor recognition
and electronic access control

Accuracy when
going to press
The use of advanced technology and the high quality standard of our
instruments are the result of a continuous development. This may
result in differences between this operating manual and your instru-
ment. 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 meter described for 3 years from the date of pur-
chase.
The meter 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 han-
dling or unauthorized opening of the meter 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.
CE conformity
Radio data transmission
SI Analytics GmbH hereby declares that the ProLab 4000 meter is in
compliance with the basic requirements and the other relevant regula-
tions of the directive 1999/5/EC.
The EC declaration of conformity can be requested from SI Analytics
GmbH.
Copyright ©2012, SI Analytics GmbH
Reprinting - even in the form of excerpts - is only allowed with the
explicit written authorization of SI Analytics GmbH.
Printed in Germany.

ProLab 4000
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KONFORMITÄTSERKLÄRUNG
DECLARATION OF CONFORMITY
DÉCLARATION DE CONFORMITÉ
Wir erklären in alleiniger
Verantwortung, dass das
Produkt
pH-/ISE-/
Leitfähigkeits-
Messgerät
ProLab 4000
auf das sich diese Erklärung
bezieht, übereinstimmt mit
den Angaben im Kapitel
We declare under our sole
responsibility that the
product
pH / ISE /
conductivity
measuring
instrument
ProLab 4000
to which thisdeclaration
relatesisin conformity with
the specificationsin the
chapter
Nous déclaronssous notre
seule responsabilité que le
produit
Appareil de mesure
pour pH/ISE/
conductivité
ProLab 4000
auquel se réfère cette
déclaration est conforme aux
indicationsduchapitre
30. Oktober, October 30, 30 octobre 2005
AGQSF 0000-A108-01/091030
SI AnalyticsGmbH
Hattenbergstr. 10
D-55122 Mainz
Deutschland, Germany, Allemagne
Technische Daten
pH-/ISE-/Leitfähigkeits-Messgerät ProLab 4000
30. Oktober 2009

ProLab 4000
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ProLab 4000 Contents
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ProLab 4000 - Contents
1 Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
1.1 General features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
1.2 Keypad . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
1.3 Display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
1.4 Socket field . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
1.5 Automatic sensor recognition . . . . . . . . . . . . . . . . . . . . . 16
1.5.1 ID sensors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
1.5.2 Sensor data from ID sensors . . . . . . . . . . . . . . . 18
1.6 Electronic access control . . . . . . . . . . . . . . . . . . . . . . . . 19
2 Safety . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
2.1 Authorized use . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
2.2 General safety instructions . . . . . . . . . . . . . . . . . . . . . . . 22
3 Commissioning. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
3.1 Scope of delivery. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
3.2 Initial commissioning . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
3.3 Connecting the power pack. . . . . . . . . . . . . . . . . . . . . . . 24
3.4 Switching on the ProLab 4000 . . . . . . . . . . . . . . . . . . . . 25
3.5 Connecting the USB mouse . . . . . . . . . . . . . . . . . . . . . . 26
3.6 Connecting sensors . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
3.6.1 Connecting an ID sensor . . . . . . . . . . . . . . . . . . 27
3.6.2 Connecting a non ID sensor. . . . . . . . . . . . . . . . 28
3.7 Connecting optional accessories . . . . . . . . . . . . . . . . . . 28
3.7.1 RS232 interface (serial port) . . . . . . . . . . . . . . . 29
3.7.2 USB-B interface (USB Device). . . . . . . . . . . . . . 31
3.7.3 USB-A interface (USB Host) . . . . . . . . . . . . . . . 32
4 Operating principles. . . . . . . . . . . . . . . . . . . . . . . . . . . 33
4.1 Operating and display elements . . . . . . . . . . . . . . . . . . . 33
4.2 File system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
4.3 Entry of numerals, letters and characters . . . . . . . . . . . . 38
4.4 Navigation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
4.4.1 Navigation in the measured value display . . . . . 41
4.4.2 Navigation in menus. . . . . . . . . . . . . . . . . . . . . . 42
4.4.3 Navigation in dialog boxes . . . . . . . . . . . . . . . . . 44
4.4.4 Navigation in the file selection dialog box . . . . . 45

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5 Access to the meter . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
5.1 Switch the meter on and off . . . . . . . . . . . . . . . . . . . . . . . 47
5.2 Login as a user . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
5.3 Password for login . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
5.3.1 Changing the password . . . . . . . . . . . . . . . . . . . 49
5.3.2 Assigning a password. . . . . . . . . . . . . . . . . . . . . 49
5.3.3 Forgotten the password? . . . . . . . . . . . . . . . . . . 49
5.4 Lock . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
5.5 Access control and user rights. . . . . . . . . . . . . . . . . . . . . 51
5.5.1 Access control . . . . . . . . . . . . . . . . . . . . . . . . . . 52
5.5.2 User management and assigning user rights . . . 53
5.6 Lost your electronic key? . . . . . . . . . . . . . . . . . . . . . . . . . 55
6 System functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56
6.1 Overview: System settings . . . . . . . . . . . . . . . . . . . . . . . 56
6.2 Selecting the language . . . . . . . . . . . . . . . . . . . . . . . . . . 58
6.3 Selecting the country . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58
6.4 Setting the date and time. . . . . . . . . . . . . . . . . . . . . . . . . 59
6.5 Selecting the channels for measured value display. . . . . 60
6.6 Interfaces for data download . . . . . . . . . . . . . . . . . . . . . . 60
6.7 Temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61
6.7.1 Temperature unit . . . . . . . . . . . . . . . . . . . . . . . . 61
6.7.2 Temperature measurement . . . . . . . . . . . . . . . . 62
6.8 Automatic stability control . . . . . . . . . . . . . . . . . . . . . . . . 63
6.9 Color assignment. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64
6.10 Reset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65
6.10.1 Resetting the sensor settings . . . . . . . . . . . . . . . 65
6.10.2 Resetting the system settings. . . . . . . . . . . . . . . 66
6.11 List of open windows . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67
7 pH . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69
7.1 General information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69
7.2 Measuring the pH value. . . . . . . . . . . . . . . . . . . . . . . . . . 70
7.2.1 Preparatory activities . . . . . . . . . . . . . . . . . . . . . 70
7.2.2 Measuring. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71
7.2.3 Measurement settings . . . . . . . . . . . . . . . . . . . . 73
7.3 Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 74
7.3.1 Carrying out a calibration procedure
(example: AutoCal DIN) . . . . . . . . . . . . . . 79
7.3.2 Carrying out a calibration procedure
(example: VariCal) . . . . . . . . . . . . . . . . . . . . . . . 83
7.3.3 Calibration settings and calibration data. . . . . . . 87
7.3.4 Calibration interval . . . . . . . . . . . . . . . . . . . . . . . 88

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8ORP voltage. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 89
8.1 General information. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 89
8.2 Measuring the ORP. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 90
8.2.1 Preparatory activities . . . . . . . . . . . . . . . . . . . . . 90
8.2.2 Measuring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 91
8.2.3 Measuring the relative ORP . . . . . . . . . . . . . . . . 93
8.2.4 Measurement settings . . . . . . . . . . . . . . . . . . . . 96
9 Ion concentration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 97
9.1 General information. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 97
9.2 Measuring the ion concentration . . . . . . . . . . . . . . . . . . 98
9.2.1 Preparatory activities . . . . . . . . . . . . . . . . . . . . . 98
9.2.2 Measuring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 99
9.2.3 Measurement settings . . . . . . . . . . . . . . . . . . . 101
9.3 Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 103
9.3.1 Carrying out calibration . . . . . . . . . . . . . . . . . . 106
9.3.2 Calibration data . . . . . . . . . . . . . . . . . . . . . . . . 110
9.4 Blank value correction. . . . . . . . . . . . . . . . . . . . . . . . . . 111
9.5 Reference measurement. . . . . . . . . . . . . . . . . . . . . . . . 112
9.6 Measuring with increment procedure (methods). . . . . . 113
9.6.1 Selecting the measuring method . . . . . . . . . . . 113
9.6.2 Standard addition . . . . . . . . . . . . . . . . . . . . . . . 114
9.6.3 Double standard addition . . . . . . . . . . . . . . . . . 118
9.6.4 Standard subtraction . . . . . . . . . . . . . . . . . . . . 122
9.6.5 Sample addition . . . . . . . . . . . . . . . . . . . . . . . . 126
9.6.6 Sample subtraction . . . . . . . . . . . . . . . . . . . . . 130
9.6.7 Blank value addition
(Standard addition with blank value correction) 134
10 Conductivity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 139
10.1 General information. . . . . . . . . . . . . . . . . . . . . . . . . . . . 139
10.2 Measuring the conductivity . . . . . . . . . . . . . . . . . . . . . . 139
10.2.1 Preparatory activities . . . . . . . . . . . . . . . . . . . . 139
10.2.2 Measuring . . . . . . . . . . . . . . . . . . . . . . . . . . . . 140
10.2.3 Measurement settings . . . . . . . . . . . . . . . . . . . 142
10.2.4 Determining/setting the
temperature compensation . . . . . . . . . . . . . 144
10.2.5 Selecting the nonlinear
temperature compensation TC nLF . . . . . . . . . 147
10.2.6 Selecting the linear
temperature compensation TC Lin... . . . . . . . . 147
10.2.7 Selecting and adjusting the nonlinear
temperature compensation TC nLin1 . . . . . 148
10.2.8 Selecting and determining the nonlinear
temperature compensation TC nLin2 . . . . . 150
10.2.9 Selecting and determining the nonlinear
temperature compensation TC nLin3 . . . . . 152

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10.2.10 Selecting and determining the nonlinear
temperature compensation TC nLin4 . . . . . 154
10.2.11 Switching off the temperature compensation
(TC off) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 156
10.3 Determining the cell constant (calibration in control
standard) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 157
10.3.1 Determining the cell constant (calibration) . . . . 159
10.3.2 Calibration settings and calibration data. . . . . . 160
11 Memory . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 161
11.1 Measurement data. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 161
11.1.1 Creating and selecting a file for manually
stored measurement datasets . . . . . . . . . . . . . 162
11.1.2 Storing measurement datasets manually . . . . . 163
11.1.3 Automatically storing measurement datasets . . 164
11.1.4 Displaying and filtering stored measurement
datasets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 166
11.1.5 Erasing measurement datasets . . . . . . . . . . . . 167
11.2 Calibration data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 168
11.2.1 Displaying stored calibration data. . . . . . . . . . . 168
11.2.2 Managing the calibration data. . . . . . . . . . . . . . 169
11.3 Recorder data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 170
11.4 Configuration data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 170
12 Recorder . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 171
12.1 Recording the measured value curve . . . . . . . . . . . . . . 172
12.2 Recording the curve of the measured
temperature value . . . . . . . . . . . . . . . . . . . . . . . . 173
12.3 Storing recorder data . . . . . . . . . . . . . . . . . . . . . . . . . . . 174
12.4 Displaying stored recorder data. . . . . . . . . . . . . . . . . . . 175
12.5 Settings for the recorder . . . . . . . . . . . . . . . . . . . . . . . . 176
12.5.1 Defining the recording interval . . . . . . . . . . . . . 177
12.5.2 Specifying the axes of the system
of coordinates . . . . . . . . . . . . . . . . . . . . . 177
12.5.3 Defining and activating limit values. . . . . . . . . . 179
12.5.4 Defining the colors for the
recorder representation . . . . . . . . . . . . . . . . 180
12.6 Changing the displayed axis intercept . . . . . . . . . . . . . . 181
12.7 Displaying exact measurement data at a point (cursor) 183
12.8 Deleting stored recorder data . . . . . . . . . . . . . . . . . . . . 183
13 Transmitting data . . . . . . . . . . . . . . . . . . . . . . . . . . . . 185
13.1 Printing current measurement data . . . . . . . . . . . . . . . . 185
13.2 Transmitting data (to a PC or printer) . . . . . . . . . . . . . . 185
13.2.1 RS232 interface . . . . . . . . . . . . . . . . . . . . . . . . 185
13.2.2 USB-B interface (USB Device) . . . . . . . . . . . . . 186
13.2.3 USB-A interface (USB Host). . . . . . . . . . . . . . . 187
13.2.4 Options for data transmission . . . . . . . . . . . . . . 187

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13.3 Data backup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 188
13.3.1 Data backup by the administrator . . . . . . . . . . 188
13.3.2 Viewing backed up data . . . . . . . . . . . . . . . . . . 189
14 Configurations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 190
14.1 Viewing a configuration . . . . . . . . . . . . . . . . . . . . . . . . . 191
14.2 Creating a new configuration . . . . . . . . . . . . . . . . . . . . 192
14.3 Loading a configuration. . . . . . . . . . . . . . . . . . . . . . . . . 193
14.4 Deleting a configuration . . . . . . . . . . . . . . . . . . . . . . . . 194
15 Maintenance, cleaning, disposal. . . . . . . . . . . . . . . . 195
15.1 Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 195
15.2 Cleaning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 196
15.3 Disposal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 196
16 What to do if... . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 197
16.1 pH and ORP measurement. . . . . . . . . . . . . . . . . . . . . . 197
16.2 Ion selective measurement . . . . . . . . . . . . . . . . . . . . . . 199
16.3 Conductivity measurement . . . . . . . . . . . . . . . . . . . . . . 200
16.4 General errors. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 201
17 Technical Data. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 203
17.1 General data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 203
17.2 Measuring ranges, resolution, accuracy . . . . . . . . . . . . 206
17.2.1 Temperature. . . . . . . . . . . . . . . . . . . . . . . . . . . 206
17.2.2 pH/ORP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 206
17.2.3 ISE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 207
17.2.4 Conductivity . . . . . . . . . . . . . . . . . . . . . . . . . . . 207
18Lists . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 209
Appendix . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 219
A.19 Firmware update . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 219
A.20 Menus . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 221
A.20.1 Main menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . 221
A.20.2 pH sensor menu. . . . . . . . . . . . . . . . . . . . . . . . 223
A.20.3 U sensor menu. . . . . . . . . . . . . . . . . . . . . . . . . 224
A.20.4 dU sensor menu. . . . . . . . . . . . . . . . . . . . . . . . 224
A.20.5 ISE sensor menu . . . . . . . . . . . . . . . . . . . . . . . 225
A.20.6 Cond sensor menu. . . . . . . . . . . . . . . . . . . . . . 226

Contents ProLab 4000
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ProLab 4000 Overview
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1Overview
1.1 General features
The ProLab 4000 precision meter enables you to
perform pH, ORP, conductivity and ion-selective measurements rapidly
and reliably.
Das ProLab 4000 provides the maximum degree of ease of use, reli-
ability and, above all, measuring certainty for all applications.
The proven calibration procedures, and
stability control function (SC) and the sensor recognition function sup-
port your work with the meter.
In addition, the ProLab 4000 provides an electronic access control.
Documented measurement data is thus automatically assigned to a
user.
1
2
4
3
1Keypad
2Display
3Reader field for electronic access con-
trol
4Jack field

Overview ProLab 4000
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1.2 Keypad
Keys with dedicated
functions
Keys with dedicated functions are labeled on the meter.
In this operating manual, they are identified by the key labeling, bold let-
ters and angle brackets <..> .
Keys with changing
functions
(softkeys)
Keys with changing functions are not labeled; the currently assigned
function is shown on the display instead. In this operating manual,
these keys are identified by the displayed softkey function, bold letters
and angle brackets [..] .
The key symbol (e.g. <OK> or [OK]) generally means you should press
a key in this operating manual.
Key functions
123
456
789
0
.
ABC DEF
GHI JKL MNO
PQRS TUV WXYZ
_
SCMODE
DEL
STO
ESC
PRINT
CAL
RCL
OK
<On/Off> Switch the meter on/off
<MODE> Select measured parameter
<CAL> Call up calibration procedure
<SC> Switch on or off the stability control func-
tion manually.
<>Reduce values, Scroll
Move in the menu
<>Increase values, Scroll
Move in the menu
<>Reduce values, Scroll
Move in the menu
<>Increase values, Scroll
Move in the menu
MODE
CAL
SC

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Alphanumeric keypad The keys of the alphanumeric keypad are used to enter numerals
(<0...9>), letters (<A...Z>) and characters (<- .>). The keys of the alpha-
numeric keypad only have a function if the ProLab 4000 is waiting for a
character to be entered, e.g. in input fields for the ID during manual
storage.
<OK> Confirm entries
<ESC> Return to higher menu level /
Cancel inputs
<STO> Store a measured value
<RCL> Open the menu for stored measured val-
ues
<PRINT> Print or output data to an interface (serial
RS232, USB-A (USB Host) or USB-B USB
Device))
OK
ESC
STO
RCL
PRINT
<0...9> Press the key once.
The numeral is displayed in the input field
<A...Z> Press the key several times if necessary
until the required letter is displayed in the
input field
<- .> Depending on the input field, the keys is
automatically interpreted as a minus sign
or decimal point.
Numeral input field:
Cursor is in front of the first digit: Minus.
Cursor is behind a numeral: Decimal point
<DEL> Deletes the character left of the cursor
7
PQRS
7
PQRS
.
_
LDE

Overview ProLab 4000
14 ba75646e03 12/2012
1.3 Display
The graphic color display can display three measured parameters and
the current temperature value for each measured parameter at the
same time.The illumination enables to read the display even in the
darkness.
Elements:
1Menu line (main menu)
2Sensor window (title bar)
3Menu line (sensor menu)
4Status line
5Info line with date and time, info or action text
6Key assignment with changing functions (softkeys)
7Temperature display
8Measured value (with unit)
9Measured parameter
10 ID sensor symbol
11 CalClock
1
2
3
10
9
8
7
65
11
4

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1.4 Socket field
Connections:
1Conductivity measuring cell (Cond Probe)
2pH/ISE/ORP electrode (pH/U/ISE Probe 2)
3Reference electrode (Ref 2)
4Temperature sensor (TP 2)
5pH/ISE/ORP electrode (pH/U/ISE Probe 1)
6Reference electrode (Ref 1)
7Temperature sensor (TP 1)
8USB Host interface, e.g. for
– the USB mouse,
– a USB printer,
– a USB hub,
– a USB keyboard,
– a USB storage,
– a USB card reader or
– other USB devices
9USB interface (USB Device),
e.g. for a PC.
10 Power pack (9V/DC input)
11 RS232 interface (RS232)
pH/U/ISE
Probe 2
Cond
Probe
TP 2
Ref 2
TP 1
Ref 1
pH/U/ISE
Probe 1
USB Device
USB Host
RS232
9V/DC
input
1 2 3
410
11
6
7
5
9
8
CAUTION
Only connect sensors to the meter that cannot return any voltag-
es or currents that are not allowed (> SELV and > current circuit
with current limiting).
Almost all sensors - in particular SI Analytics sensors - fulfill
these conditions.

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1.5 Automatic sensor recognition
The automatic sensor recognition function enables
to operate a sensor with different meters without recalibrating
to operate different sensors with one meter without recalibrating
to assign measurement data to a sensor
– measurement datasets are always downloaded to the interface
with the sensor type and sensor series number.
– measurement datasets are always stored together with the sen-
sor type and sensor series number.
to assign calibration data to a sensor
– calibration data is always downloaded to the interface with the
sensor type and sensor series number.
the automatic activation of the cell constants for conductivity sen-
sors
to hide menus that are not relevant for this sensor
To be able to use the automatic sensor recognition function a meter is
required that supports the automatic sensor recognition (e.g.
ProLab 4000), and a sensor (ID sensor) that is suitable for sensor rec-
ognition.
In every ID sensor, sensor data is stored that clearly identifies the sen-
sor.
The sensor data is sent to the meter automatically via radio commu-
nication and used for sensor identification there.
DIN
BNC
Note
With the ProLab 4000 you can also operate non ID sensors. Then,
however, you cannot use the advantages of the sensor recognition
function.

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1.5.1 ID sensors
SI Analytics GmbH ID sensors support the automatic sensor recogni-
tion function. Their sensor designation has the addition "ID", e.g. Blue-
Line A 161 1M-BNC-ID electrode.
ID sensors connected to the ProLab 4000 meter can be recognized by
the ID sensor symbol on the display.
Note
Information on available ID sensors is given on the Internet or directly
by SI Analytics.
ID sensor
symbol

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1.5.2 Sensor data from ID sensors
ID sensors transmit the following sensor data to the meter:
SENSOR ID
– Sensor type
– Sensor series number
Calibration data
– Calibration date
– User (having carried out the last calibration procedure)
– Calibration characteristics
– Calibration interval
– Selected buffer set (pH electrodes only)
– Last cell constant (conductivity measuring cell only)
Measurement settings (conductivity measuring cells only)
– Specified reference temperature
– Adjusted temperature coefficient
– Adjusted TDS factor
The calibration data is updated in the ID sensor after each calibration
procedure. A message is displayed while data is updated in the sensor.
Note
While data is updated in the sensor, the sensor must not be discon-
nected because otherwise the calibration data will not be completely
transmitted. The sensor will then have no valid calibration.
Note
If non-ID sensors are used, the calibration data from the meter is used
and also stored in the meter.

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1.6 Electronic access control
The ProLab 4000 always documents measurement and calibration
data together with a user name.
Thus all measurement data is assigned to the user, in compliance with
GLP.
The user name is easily and safely transmitted to the ProLab 4000 via
an electronic key. Each electronic key in the form of a keyring pendant
contains a key number and a user name. The key number and user
name are read by the meter via a contactless radio data connection.
The meter checks the access authorization for the user name. Mea-
surements with an electronic key are only possible if the key number
and user name is registered in the meter. The measuring data is then
documented along with the registered user name.
If the user name of an electronic key is not registered in the meter,
access to the meter with this electronic key is denied.
If access to the meter is anonymous (no password, no electronic key
required), all data are documented with the user name, Anonymous.
By labeling the measurement data with Anonymous, this data can be
excluded from the GLP-compliant documentation.
Reader field for
the electronic
key

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