Radiometer Analytical TitraLab 870 User manual

TitraLab®870
pH/EP/IP/EC/ISE Titration Workstation
Reference Manual
D21T060

D21T060 • Printed by Radiometer Analytical SAS • 2008-02F

TitraLab®TitraLab 870 Reference Manual
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Contents
Contents..................................................................................................................3
Introduction ..........................................................................................................15
General Information .............................................................................................16
Starting up ............................................................................................................17
Read me! ...............................................................................................................18
Practical examples ..............................................................................................23
Programming electrodes ...........................................................................................25
Programming reagents ..............................................................................................27
Programming methods ..............................................................................................29
Programming TIM sequences ...................................................................................33
Programming SAC sequences ..................................................................................35
Programming tips ................................................................................................38
Glossary ...............................................................................................................41
0IP (result indicator) ...................................................................................................43
ABU1/ABU2 .................................................................................................................43
Accept a result ............................................................................................................43
Acceptance criteria ....................................................................................................44
Acceptation .................................................................................................................45
Access routine mode .................................................................................................45
Active electrode unknown in "method ID" ...............................................................45
Add method menu ......................................................................................................46
Add. reagent = Titrant ................................................................................................47
Addition .......................................................................................................................47
Addition delay .............................................................................................................47
Addition method - definition .....................................................................................48
Addition method - programmation ...........................................................................49
Addition volume .........................................................................................................50
Address .......................................................................................................................50
Alarm: Locked .............................................................................................................50
Alarm: Unlocked .........................................................................................................51
Aliquot .........................................................................................................................51
Alphanumeric characters ..........................................................................................52
Amount unit ................................................................................................................52
Applied signal (AC/DC) ..............................................................................................52
Archives data lost - Cal. Data lost - Methods kept ..................................................52
Assistant function ......................................................................................................53

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Autochaining ...............................................................................................................53
Auxiliary input .............................................................................................................54
Auxiliary output ..........................................................................................................55
Aux. action / Aux. on for ............................................................................................56
Back reagent = Titrant ................................................................................................56
Back reagent unknown ..............................................................................................56
Back titration ...............................................................................................................56
Back titration - ID ........................................................................................................56
Back titration No/Manual/Automatic .........................................................................57
Balance cables - A95Z201, A95Z202 .........................................................................58
Balance cables - A95Z204, A95Z205 .........................................................................59
Balance cables - A95Z206, A95Z207 .........................................................................60
Balance cables - A95Z208 ..........................................................................................61
Balance connection ....................................................................................................62
Balance in use ............................................................................................................63
Bar code reader connection ......................................................................................63
Batch number .............................................................................................................63
Beaker detection .........................................................................................................64
Beaker detection minimum height ............................................................................65
Beaker menu ...............................................................................................................66
Beakers: [F;L] .............................................................................................................67
Beep .............................................................................................................................67
Blank (Yes/No) ............................................................................................................67
Blank concentration ...................................................................................................67
Blank not required ......................................................................................................67
Blank on inflection no. ...............................................................................................67
Blank required ............................................................................................................68
Blank volume ..............................................................................................................68
Burette functions menu .............................................................................................68
Burette speed ..............................................................................................................69
Burette volume ...........................................................................................................69
C0 (Detection limit) .....................................................................................................69
Cable capacity ............................................................................................................70
Cable resistance .........................................................................................................71
Calculate with EP no. .................................................................................................72
Calculate with IP no. ...................................................................................................72
Calibrate electrodes ...................................................................................................72
Calibrate reagents ......................................................................................................72
Calibration curve of an ISE electrode .......................................................................72
Calibration delay elapsed ..........................................................................................73
Calibration parameters ..............................................................................................73

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Calibration request .....................................................................................................73
Calibration results parameters ..................................................................................73
Calibration sequence .................................................................................................73
Calibration stack .........................................................................................................74
Catalogue list ..............................................................................................................74
Cell constant (parameter) ..........................................................................................74
Cell constant (definition) ...........................................................................................75
Cell grounding ............................................................................................................75
Cell window .................................................................................................................76
Change electrode name .............................................................................................76
Change method name ................................................................................................76
Change reagent name ................................................................................................76
Change sequence name ............................................................................................77
Check command .........................................................................................................78
Check electrodes ........................................................................................................78
Check reagents ...........................................................................................................79
Communication failure (SAC error) ..........................................................................79
Concentration .............................................................................................................79
Concentration unit ......................................................................................................79
Conductivity cell .........................................................................................................79
Conductivity cell calibration ......................................................................................80
Conductivity measurement method .........................................................................80
Configuration menu ...................................................................................................81
Connections ................................................................................................................81
Continuous IP method ...............................................................................................82
Contrast .......................................................................................................................83
Controlled by TTL IN ..................................................................................................83
Copy electrode ............................................................................................................84
Copy method ...............................................................................................................85
Copy reagent ...............................................................................................................85
Coupled method .........................................................................................................86
Create electrode .........................................................................................................87
Create method ............................................................................................................88
Create reagent ............................................................................................................88
Current value ..............................................................................................................88
Curve ...........................................................................................................................89
Curves data lost - Cal. Data kept - Methods kept ....................................................89
Customise ...................................................................................................................89
Date entry ....................................................................................................................89
Default parameters .....................................................................................................90
Delay after addition ....................................................................................................90

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Delete electrode ..........................................................................................................90
Delete method .............................................................................................................91
Delete reagent .............................................................................................................91
Delete sequence .........................................................................................................91
Demand: Locked .........................................................................................................91
Demand: Unlocked .....................................................................................................92
Derivative ....................................................................................................................92
Detailed ........................................................................................................................93
Detection limit (C0) .....................................................................................................93
Dilution (Yes/No) .........................................................................................................93
Dilution or sample unit incompatible .......................................................................94
Direction ......................................................................................................................94
Direct ISE measurement method - definition ...........................................................95
Direct ISE measurement method - notes .................................................................96
Direct ISE measurement method - programmation .................................................96
Direct measurements .................................................................................................96
Disconnect electrodes ...............................................................................................97
Display contrast ..........................................................................................................97
Display measurement ................................................................................................98
Dyn. rinse ....................................................................................................................99
Dynamic dose ...........................................................................................................100
Dynamic IP method ..................................................................................................101
Dynamic rinses .........................................................................................................102
E0 standard potential ...............................................................................................102
EC socket ..................................................................................................................103
Edit electrode menu .................................................................................................104
Edit method menu ....................................................................................................105
Edit reagent menu ....................................................................................................106
Edit sequence menu .................................................................................................107
Electrode calibration (conductivity) .......................................................................108
Electrode calibration (ISE) .......................................................................................109
Electrode calibration (pH) ........................................................................................110
Electrode calibration (SAC sequence) ...................................................................111
Electrode calibration not required ..........................................................................112
Electrode calibration parameters ............................................................................112
Electrode calibration stack ......................................................................................113
Electrode connection ...............................................................................................114
Electrode connection - Important ...........................................................................115
Electrode function ....................................................................................................115
Electrode icons .........................................................................................................116
Electrode ID ...............................................................................................................117

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Electrode identification ............................................................................................117
Electrode library .......................................................................................................117
Electrode not calibrated ...........................................................................................117
Electrode system ......................................................................................................118
Electrode type ...........................................................................................................118
Electrode window .....................................................................................................119
Electrodes are different ...........................................................................................119
Empty burette ...........................................................................................................119
Empty sequence .......................................................................................................119
End point ...................................................................................................................120
End point delay .........................................................................................................120
End point method .....................................................................................................120
Enter titre ...................................................................................................................121
Equation formula ......................................................................................................122
Equation formula ......................................................................................................123
Equation ID ................................................................................................................123
Equation unit .............................................................................................................124
Equivalent point determination (IP methods) ........................................................125
Equivalent point determination (IP methods) ........................................................126
ERR#32 (SAC error) ..................................................................................................127
Error messages ........................................................................................................128
Error in equation formula ........................................................................................129
Excess reagent ID .....................................................................................................129
Excess titre ...............................................................................................................129
Excess volume ..........................................................................................................129
Expiry date ................................................................................................................130
Expiry date elapsed ..................................................................................................130
Fill burette .................................................................................................................130
Final dil. amount .......................................................................................................130
Flush burette .............................................................................................................131
Format (printouts) ....................................................................................................131
Function ....................................................................................................................132
Fuses .........................................................................................................................132
Global flush burettes ................................................................................................133
Global variable ..........................................................................................................133
GLP-Archives menu .................................................................................................134
GRAN = f(Volume) curve ..........................................................................................135
Ground conflict .........................................................................................................136
Help ............................................................................................................................136
High (result indicator) ..............................................................................................136
Icons ..........................................................................................................................137

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ID ................................................................................................................................138
Increment ..................................................................................................................138
Inflection Point (IP) ...................................................................................................138
Input address conflict ..............................................................................................138
Insert method menu .................................................................................................139
Install burette ............................................................................................................139
Install reagent ...........................................................................................................140
Insufficient number of beakers in sequence .........................................................140
IP filter .......................................................................................................................140
IP reject ......................................................................................................................141
IP>1 (result indicator) ...............................................................................................141
ISE calibration results parameters .........................................................................141
ISE calibration solutions ..........................................................................................141
ISE Standard addition method - definition .............................................................142
ISE Standard addition method - programmation ...................................................143
Iso pH .........................................................................................................................144
Keyboard connection ...............................................................................................145
Keyboard connection - Important ...........................................................................146
Language ...................................................................................................................146
Linear (temperature correction) ..............................................................................146
Low (result indicator) ...............................................................................................146
Main window .............................................................................................................147
Mains frequency .......................................................................................................147
Man. stop (result indicator) .....................................................................................147
Manual dosing ..........................................................................................................148
Max. stab reached ....................................................................................................148
Max. stab time ...........................................................................................................149
Max. volume ..............................................................................................................149
Max. vol - Predose > Bur. vol ...................................................................................149
Max. volume reached ...............................................................................................149
Maximum dose ..........................................................................................................150
Measure type conflict for a reprocessing in "Method ID" ....................................150
Measurement ............................................................................................................151
Method .......................................................................................................................152
Method ID ..................................................................................................................152
Method library ...........................................................................................................153
Method parameters menu ........................................................................................153
Method results menu ...............................................................................................154
Method type incompatible for a reprocessing .......................................................154
Method wrong type ...................................................................................................154
Min. cell cst - Max. cell cst .......................................................................................154

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Min. ordinate Max. ordinate .....................................................................................155
Min. ordinate Max. ordinate - Blank ........................................................................156
Min. pH0(25) - Max. pH0(25) .....................................................................................156
Min. sensitivity - Max. sensitivity ............................................................................156
Min. speed - Max. speed ..........................................................................................157
Min. Temp. - Max. Temp. ..........................................................................................157
Minimum value - Maximum value ............................................................................158
Missing beaker (SAC error) .....................................................................................159
Missing EP ................................................................................................................159
Missing IP ..................................................................................................................159
Mode ..........................................................................................................................159
Molar weight ..............................................................................................................160
Monotonic IP method ...............................................................................................160
Nat. water (temperature correction) ........................................................................160
Nb lines per page (printouts) ...................................................................................161
No curve generation for a reprocessing ................................................................161
No curve stored within the instrument ...................................................................161
No stirrer (SAC error) ...............................................................................................162
None (temperature correction) ................................................................................162
Notification message ...............................................................................................162
Number of additions .................................................................................................163
Number of buffers ....................................................................................................163
Number of cycles ......................................................................................................163
Number of decimals .................................................................................................163
Number of digits .......................................................................................................164
Number of dynamic rinses ......................................................................................164
Number of EP ............................................................................................................164
Number of equations ................................................................................................164
Number of IP .............................................................................................................165
Number of results .....................................................................................................165
Number of static rinses ............................................................................................166
Number of solutions .................................................................................................166
Number of tests ........................................................................................................167
OK (result indicator) .................................................................................................167
Others list ..................................................................................................................167
Parameters menu .....................................................................................................167
PC cable - A95X501 ..................................................................................................168
PC connection ..........................................................................................................168
PC keyboard ..............................................................................................................168
Periodicity .................................................................................................................169
Periodicity for QC samples ......................................................................................169

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pH0(25) ......................................................................................................................169
pH buffer ....................................................................................................................169
pH calibration results parameters ..........................................................................170
pH calibration solutions parameters ......................................................................170
pH int .........................................................................................................................170
Potential jump ...........................................................................................................171
Potential versus SHE ...............................................................................................172
Predose mode, Predose until ..................................................................................173
Preprogrammed list ..................................................................................................173
Printer ........................................................................................................................174
Printer cables - A95P201, A95X506 .........................................................................175
Printer connection ....................................................................................................176
Print in table ..............................................................................................................176
Printouts ....................................................................................................................177
Printouts detailed .....................................................................................................178
Printouts menu .........................................................................................................178
Printouts setup .........................................................................................................179
Printouts title ............................................................................................................179
Programming method ..............................................................................................180
Programming sequence ...........................................................................................181
Proportional band .....................................................................................................182
QC (result indicator) .................................................................................................182
QC analysis required ................................................................................................182
QC data menu ...........................................................................................................183
QC ID ..........................................................................................................................183
QC not required ........................................................................................................183
QC periodicity elapsed .............................................................................................183
QC sample .................................................................................................................184
QC sample (Yes/No) .................................................................................................184
Reaction X Exc. + Y Titr ...........................................................................................185
Reaction X Smp + Y Titr ...........................................................................................186
Reaction X Smp + Y Exc ..........................................................................................187
Reaction X Std + Y Titr ............................................................................................188
Reagent addition ID .................................................................................................188
Reagent addition volume .........................................................................................189
Reagent calibration ..................................................................................................189
Reagent calibration (SAC sequence) ......................................................................190
Reagent calibration not required ............................................................................191
Reagent calibration parameters ..............................................................................191
Reagent calibration stack ........................................................................................192
Reagent icons ...........................................................................................................193

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Reagent ID .................................................................................................................194
Reagent identification ..............................................................................................194
Reagent library .........................................................................................................194
Reagent not calibrated .............................................................................................194
Reagent system ........................................................................................................195
Reagent titre not entered .........................................................................................195
Reagent unit ..............................................................................................................195
Reagent window .......................................................................................................195
Recalculate results ...................................................................................................196
Ref. electrode conflict ..............................................................................................197
Reference Temp. .......................................................................................................197
Reject a result ...........................................................................................................197
Remove burette ........................................................................................................197
Remove method from a sequence ..........................................................................197
Remove reagent ........................................................................................................197
Replace burette .........................................................................................................198
Replace electrodes ...................................................................................................198
Replace reagent ........................................................................................................199
Replacing reagent bottle ..........................................................................................199
Reprocessing a curve ..............................................................................................200
Reprocessing a curve (rules) ..................................................................................201
Reprocessing a curve (Automatic mode) ...............................................................202
Reprocessing a curve (Manual mode) ....................................................................203
Reprocessing a reagent calibration curve .............................................................204
Reset memory ...........................................................................................................204
Reset to factory settings ..........................................................................................204
Result accepted (Yes/No) ........................................................................................205
Result ID ....................................................................................................................206
Result indicators ......................................................................................................206
Result unit .................................................................................................................207
Results .......................................................................................................................208
Results by difference/cumulate ..............................................................................209
Results factor (Yes/No) ............................................................................................209
Results menu ............................................................................................................210
Rinse aux. output .....................................................................................................210
Rinse burette .............................................................................................................211
Rinse time .................................................................................................................211
Routine mode ............................................................................................................212
Run window ..............................................................................................................213
Run window (continued) ..........................................................................................214
Running a manual dosing ........................................................................................215

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Running a method ....................................................................................................216
Running a reagent calibration sequence ...............................................................216
Running a SAC sequence ........................................................................................217
Running a TIM sequence .........................................................................................218
Running an electrode calibration sequence ..........................................................218
SAC arm obstructed (SAC error) ............................................................................219
SAC ext. cell GND .....................................................................................................219
SAC Method ..............................................................................................................219
SAC option missing (SAC error) .............................................................................219
SAC Sequence ..........................................................................................................219
SAC switch Off/On (SAC error) ...............................................................................219
SAC80/SAC90/SAC850/SAC950 ..............................................................................220
Same buffer change buffer ......................................................................................220
Sample amount .........................................................................................................220
Sample changer ........................................................................................................221
Sample changer cable - A95A202 (SAC80/SAC90) ................................................222
Sample changer cable - A95X501 (SAC850/SAC950) ............................................222
Sample dilution conflict ...........................................................................................223
Sample ID ..................................................................................................................223
Sample menu ............................................................................................................223
Sample preparation no. ............................................................................................224
Sample stack .............................................................................................................225
Sample type incompatible .......................................................................................225
Sample unit ...............................................................................................................226
Sample unit conflict .................................................................................................226
Select electrode ........................................................................................................226
Select method ...........................................................................................................226
Select reagent ...........................................................................................................227
Select sequence .......................................................................................................227
Sensitivity ..................................................................................................................227
Sequence/SAC sequence ........................................................................................228
Sequence/Sample stack menu ................................................................................229
Sequence end in Park (Yes/No) ...............................................................................229
Sequence ID ..............................................................................................................229
Serial number ............................................................................................................230
Setup menu ...............................................................................................................230
Simultaneous additions (Yes/No) ...........................................................................231
Skip empty position .................................................................................................231
Smoothing parameter ..............................................................................................232
Software version .......................................................................................................232
Solution menu ...........................................................................................................233

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Speed .........................................................................................................................234
Stability ......................................................................................................................234
Standard (conductivity standard) ...........................................................................235
Standard addition ID ................................................................................................236
Standard addition method .......................................................................................236
Standard amount ......................................................................................................236
Standard ID ...............................................................................................................236
Standard menu .........................................................................................................237
Standard potential ....................................................................................................237
Standard solution (conductivity measurements) ..................................................237
Standard solution (ISE measurements) .................................................................237
Standard solution (reagent calibration) .................................................................237
Standard unit incompatible .....................................................................................238
Start addition ............................................................................................................238
Start from ..................................................................................................................238
Start timer ..................................................................................................................239
Static rinses ..............................................................................................................239
Static rinse time ........................................................................................................239
Statistics ....................................................................................................................239
Std add volume Automatic/Programmed/ ..............................................................239
Std conc. too low (or high) ......................................................................................240
Stirring .......................................................................................................................241
Stoichiometric coefficients ......................................................................................242
Stop after last IP .......................................................................................................242
Stop analysis ............................................................................................................242
Stop point ..................................................................................................................243
Supervisor code .......................................................................................................244
Supervisor mode ......................................................................................................245
T°C minimum/maximum value ................................................................................245
Target titre .................................................................................................................245
Temp. coef. ................................................................................................................245
Temp. correction None/Linear/Nat. water ..............................................................246
Temperature Probe/ Fixed at 25°C/Entered ............................................................247
Temperature sensor ID ............................................................................................247
Test amount ..............................................................................................................247
The sequence is empty ............................................................................................248
TIM cell external Gnd ...............................................................................................248
Time max (result indicator) ......................................................................................248
Title ............................................................................................................................248
Titrant ID ....................................................................................................................249
Titre Enter/Calibrate .................................................................................................249

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Tray missing (SAC error) .........................................................................................249
TTL 5 V OUT/TTL 12 V OUT (sockets) .....................................................................250
TTL IN (sockets) .......................................................................................................250
Turntable blocked (SAC error) ................................................................................251
Type of method .........................................................................................................251
User ID (Yes/No) .......................................................................................................251
User list .....................................................................................................................251
User’s rights ..............................................................................................................252
Valency ......................................................................................................................253
Viewing global variables ..........................................................................................253
Volume .......................................................................................................................253
Vstd>max (result indicator) .....................................................................................253
Working mode ...........................................................................................................254
Wrong buffer .............................................................................................................254
Wrong type (SAC error) ...........................................................................................254
Zero pH ......................................................................................................................254
Appendixes ........................................................................................................255
Appendix 1: Preprogrammed methods ..................................................................257
Appendix 2: General information ............................................................................259
Appendix 3: Result calculations .............................................................................263
Appendix 4: Technical specifications ....................................................................281

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Introduction
The TitraLab 870 Titration Workstation is dedicated for routine use. It offers two distinct user
levels:
• Supervisor
Dedicated for operators who wish to edit their methods to fit their specific needs. They can
also assign a password to protect the programmed data from eventual changes.
•Routine
Dedicated for operators wishing to use the routine functions to guide them step by step
through the analyses.
The TIM870 can store up to 50 methods, 30 electrodes and 30 reagents. In addition 30 elec-
trodes and 20 titrants have been pre-defined to help you save time setting up your application.
Thanks to the preprogrammed applications, the Titration Manager is ready for use as soon as
it has been installed. Refer to "Appendix 1: Preprogrammed methods", page 257.
The TIM870 also allows you to automatically sequence and repeat measurements - ideal for
direct measurements followed by a titration.
The purpose of the TitraLab 870 Reference Manual is to give detailed information on the
Titration Workstation and the data displayed during operations. The information is listed in
alphabetical order for quick access and cross-references are listed in italics.
In addition to this handbook, a general User’s Guide (part no. D21T043) is available giving
descriptions and overviews of the workstation menus and operating concepts to guide you
through programming and running of the analyses.

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General Information
Safety Information
Please read this entire manual before unpacking, setting up, or operating this equipment.
Pay attention to all danger and caution statements. Failure to do so could result in serious injury
to the operator or damage to the equipment.
To ensure that the protection provided by this equipment is not impaired, do not use and do not
install this equipment in any manner other than that specified in this manual.
Precautionary Labels
Read all labels and tags attached to the instrument. Personal injury or damage to the
instrument could occur if not observed.
This symbol, if noted on the instrument, references the instruction manual
for operation and/or safety information.
Electrical and electronical equipment marked with this symbol may not be
disposed of in European public disposal systems after 13 August of 2005.
In conformity with European local and national regulations (EU Directive
2002/96/EC), European electrical equipment users must now return old
or end-of life equipment to the Producer for disposal at no charge to the
user.
Note: For equipment supplied or produced by "Radiometer Analytical",
please contact www.hach-lange.com and select your country for instruc-
tions on how to return your equipment for proper disposal.
This symbol, when noted on the product, identifies the location of a fuse
or current limiting device.
Warning !
The TitraLab 870 have been developed to meet the requirements of electrochemical appli-
cations. It is therefore aimed at experienced users who have the knowledge required to op-
erate the instrument and implement the security instructions enclosed. Please remember
that the TitraLab 870 must not, under any circumstances, be used to perform tests on living
beings.
We accept no responsibility for using the TitraLab 870 and its peripheral devices under
conditions that are not specified in this Reference Manual and its associated User’s Guide
(part no. D21T043).

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Starting up
Set up the instrument in a properly ventilated place. The power supply connector on the rear
panel must remain accessible and close to the user (2 m maximum) so that you can quickly
disconnect the cables in case of emergency.
The room temperature must be between 5 and 40°C.
The relative humidity must be between 20 and 80 %.
Connect the mains socket of the TIM870 to the mains supply using the 3-lead power cord
provided.
The TIM870 must be connected to an earthed mains socket for safety reasons.
Efficient grounding is essential for reliable measurements and security.
In the USA or Canada, use a UL listed power cord only.
Switch on the Titration Manager (O/I power switch set to "I")
The Titration Manager displays during a few seconds an identification screen (name and em-
bedded software version) followed by the Main window, see "Main window", page 147.
To a mains supply socket

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Read me!
An important feature of this Titration Manager interface is that it controls the presence of differ-
ent elements necessary to run the defined application for a selected method/sequence, before
the method/sequence is run.
Working in Supervisor mode
A Supervisor has access to all the libraries for creation purposes.
When programming the Titration Manager in “SUPERVISOR” mode, it is recommended to
work in stages. These stages must be carried out in the order described below:
A.To program method
1. Define your electrode(s)
Identify electrodes (including temperature sensors) to be used for the analysis:
Electrodes can be created from the following lists:
Catalogue, see "Catalogue list", page 74.
Other, see "Others list", page 167.
Copy from, see "Copy electrode", page 84.
When creating the electrode, define if electrode calibration is required (or not), if yes specify
the "periodicity" of the calibrations and the standards to be used.
2. Define reagent
Identify reagents to be used for the analysis
Reagents can be created from the following lists:
Catalogue, see "Catalogue list", page 74.
Other, see "Others list", page 167.
Copy from, see "Copy reagent", page 85.
When creating the reagent, define if reagent calibration is required (or titre entered manually),
if yes specify the "periodicity" of the calibrations and the calibration method. Refer to "Reagent
calibration", page 189.
If a sample changer is to be used, define the sample changer in the Configuration menu before
selecting a SAC sequence.
If you are to perform a calibration, make sure that the electrode(s) used for the
calibration are the same as those used in the method.

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3. Create new method or Edit a pre-programmed one
Create the measurement or titration method to be used for the analyses. Enter the parameters
required to calculate the results, see "Programming methods", page 29.
When you have finished programming, select the method/sequence or pre-programmed
application, see "Select method", page 226 or see "Select sequence", page 227.
If your methods are to be performed in a sequence, program the sample stack, see "Sample
stack", page 225.
4. Check icons
The following icons indicate the exact state of your working system:
Refer to "Electrode icons", page 116.
Refer to "Reagent icons", page 193.
Sunny icons are needed in order to run the selected method.
If Cloudy/Stormy/Question mark icons are displayed in the Reagent/Electrode window
press 1to activate the “Check” command. The Titration Manager will automatically
guide you through the operations required to solve the errors encountered.
Sunny icon:
Everything is OK. Run the method or sequence.
Cloudy icon:
Action required within 12 or 24 hours (for a calibration) and 1 week (for
a reagent replacement).
Stormy icon:
Electrode/reagent calibration date elapsed or electrode(s)/reagent(s)
not installed.
Question mark:
Programming error.
Calculator icon:
Reprocessing mode (Working mode = Reprocessing) is set on the
instrument.

TitraLab®TitraLab 870 Reference Manual
Page 20
B.Running methods
To run a method or sequence, see "Working in Routine mode", page 21.