wtw inoLab Oxi Level 2 User manual

inoLab
pH/ION Level 2
ba12241e03 10/2002 85
Operating Manual
pH/ION meter with integrated printer

86
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. We cannot
guarantee that there are absolutely no errors in this manual.
We are sure you will understand that we cannot accept any
legal claims resulting from the data, figures or descriptions.
Warranty
declaration
The designated instrument is covered by a warranty of three
years from the date of purchase.
The instrument warranty extends to manufacturing faults
that are determined within the period of warranty.
The warranty excludes components that are replaced during
maintenance such as batteries, etc.
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 2002, WTW GmbH & Co. KG
Reprinting - even as excerpts - is only allowed with the
explicit written authorization of WTW GmbH & Co. KG,
Weilheim.
Printed in Germany.

List of contents
87
1 Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 89
1.1 Keyboard . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .90
1.2 Display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .91
1.3 Sockets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .91
1.4 Operating structure . . . . . . . . . . . . . . . . . . . . . .92
2 Safety . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 93
2.1 Authorized use . . . . . . . . . . . . . . . . . . . . . . . . .94
2.2 General safety instructions . . . . . . . . . . . . . . . .94
3 Commissioning . . . . . . . . . . . . . . . . . . . . . . . . 97
3.1 Scope of delivery . . . . . . . . . . . . . . . . . . . . . . . .97
3.2 Initial commissioning . . . . . . . . . . . . . . . . . . . . .97
4 Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 99
4.1 Switch on the instrument . . . . . . . . . . . . . . . . . .99
4.2 Measuring the pH value/Redox voltage . . . . .100
4.2.1 Measuring the pH value . . . . . . . . . . . .101
4.2.2 Measuring the Redox voltage . . . . . . . .102
4.3 Calibrating . . . . . . . . . . . . . . . . . . . . . . . . . . . .103
4.3.1 Calibration interval (Int 3) . . . . . . . . . . .106
4.3.2 AutoCal TEC . . . . . . . . . . . . . . . . . . . .107
4.3.3 AutoCal DIN . . . . . . . . . . . . . . . . . . . . .109
4.3.4 ConCal (pH) . . . . . . . . . . . . . . . . . . . . .111
4.4 Measuring the ISE concentration . . . . . . . . . .114
4.5 ISE Calibration . . . . . . . . . . . . . . . . . . . . . . . .117
4.6 Printing measured values . . . . . . . . . . . . . . . .124
4.7 Storing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .125
4.7.1 Manual storage . . . . . . . . . . . . . . . . . . .125
4.7.2 Switching on AutoStore (Int 1) . . . . . . .127
4.7.3 Outputting the data storage . . . . . . . . .129
4.7.4 Clearing the storage . . . . . . . . . . . . . . .131
4.8 Data transmission . . . . . . . . . . . . . . . . . . . . . .132
4.8.1 Data transmission interval (Int 2) . . . . .132
4.8.2 Recorder (analog output) . . . . . . . . . . .134
4.8.3 PC/external printer (RS232 interface) .135

List of contents
88
4.8.4 Remote control . . . . . . . . . . . . . . . . . . .136
4.9 Configuration . . . . . . . . . . . . . . . . . . . . . . . . . .137
4.10 Reset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .141
5 Maintenance, cleaning, disposal . . . . . . . . . 143
5.1 Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . .143
5.1.1 Changing the batteries . . . . . . . . . . . . .144
5.1.2 Replacing the roll of printer paper . . . .145
5.2 Cleaning . . . . . . . . . . . . . . . . . . . . . . . . . . . . .146
5.3 Disposal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .146
6 What to do if... . . . . . . . . . . . . . . . . . . . . . . . . 147
6.1 pH system messages . . . . . . . . . . . . . . . . . . .147
6.2 ISE system messages . . . . . . . . . . . . . . . . . . .149
6.3 General errors . . . . . . . . . . . . . . . . . . . . . . . . .151
7 Technical Data . . . . . . . . . . . . . . . . . . . . . . . . 153
7.1 General data . . . . . . . . . . . . . . . . . . . . . . . . . .153
7.2 pH/Redox measurement . . . . . . . . . . . . . . . . .156
7.3 ISE measurement . . . . . . . . . . . . . . . . . . . . . .157
8 Lists . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 159
9 Appendix . . . . . . . . . . . . . . . . . . . . . . . . . . . . 165

Overview
89
1Overview
The compact inoLab pH/ION Level 2 precision measuring
instrument lets you perform pH, Redox, and concentration
measurements using ion selective electrodes rapidly and
reliably.
The inoLab pH/ION Level 2 provides the highest degree of
operating comfort, reliability and measuring safety for all
applications.
The integrated printer enables the measurements to be
documented in compliance with GLP.
The proven MultiCal®calibration procedures and
special AutoRead function support your work with the meter.
Note
The measuring instrument can also be delivered as part of
a set. Information on this and other accessories is available
in the WTW catalog LABORATORY AND FIELD
INSTRUMENTATION or via the Internet.
1Keypad
2Display
3Sockets
4Printer
3
2
1
4

Overview
90
1.1 Keyboard
1Paper feed/line feed
(Printer off - Print LED lights up red)
2Printer ON/OFF
3Print LED
Red: printer off (offline) or malfunction
Green:printer ready for operation (online)
4Call up calibration procedure
5Select pH/Redox measuring mode or
ISE concentration
6Display or transmit measured values
7Measuring instrument ON/OFF
8Activate/deactivate AutoRead function
9Store measured value
10 Select pH measuring mode or Redox
measuring mode, increase values, scroll
11 Confirm inputs, start AutoRead
12 Select pH measuring mode or Redox
measuring mode, reduce values, scroll
1
2
3
4
9
10
11
5
6
7
8
12

Overview
91
1.2 Display
1.3 Sockets
Caution
Only connect electrodes to the instrument that cannot feed
excessive voltages or currents (> SELV and > circuit with
current limiter). Almost all commercial electrodes -
especially WTW electrodes - meet these requirements.
Connectors:
1pH/ion electrode
2Temperature probe
3Reference electrode
4RS 232 interface / analog output
5Plug-in power supply
Status line
Measured value display
Function and
temperature display
Sensor symbol
12
3
4
5

Overview
92
1.4 Operating structure
The following overview diagram shows which keys you have
to press to select between the different measuring modes:
Note
For measuring, the electrode suiting the selected measuring
mode must be connected to the instrument.
ISE concentration
mg/l
pH value Redox
voltage
mV

Safety
93
2 Safety
This operating manual contains basic instructions that you
must follow during the commissioning, operation and
maintenance of the instrument. Consequently, all
responsible personnel must read this operating manual
before working with the instrument.
The operating manual must always be available within the
vicinity of the instrument.
Target group This measuring instrument was developed for use in the
laboratory. Thus, we assume that, as a result of their
professional training and experience, the operators will
know the necessary safety precautions to take when
handling chemicals.
Symbols used
Caution
indicates instructions that have to be followed to prevent
damage to your instrument.
Warning
indicates instructions that have to be followed to protect
yourself and the instrument from dangerous electrical
voltage.
Note
indicates notes that draw your attention to special features.
Note
indicates cross-references to other documents, e.g.
application reports, operating manuals of electrodes, etc.

Safety
94
2.1 Authorized use
This instrument is authorized exclusively for pH, Redox, and
ISE concentration measurements in the laboratory.
The technical specifications as given in chapter 7 TECHNICAL
DATA must be observed. Only the operation and running of
the measuring instrument according to the instructions given
in this operating manual is authorized.
Any other use is considered unauthorized.
2.2 General safety instructions
This instrument is constructed and tested in compliance with
the EN 61010-1 safety regulations for electronic measuring
instruments. It left the factory in a safe and secure technical
condition.
Function and
operational safety
The smooth functioning and operational safety of the
instrument can only be guaranteed if the generally
applicable safety measures and the specific safety
instructions in this operating manual are followed.
The smooth functioning and operational safety of the
instrument can only be guaranteed under the climatic
conditions specified in chapter 7 TECHNICAL DATA.
If the instrument was transported from a cold environment to
a warm environment, the formation of condensate can lead
to the faulty functioning of the instrument. In this event, wait
until the temperature of the instrument reaches room
temperature before putting the instrument back into
operation.
Caution
The instrument is only allowed to be opened by personnel
authorized by WTW.