Metrohm 916 Ti-Touch User manual

916 Ti‑Touch
Manual
8.916.8005EN / 2020-03-03

Metrohm AG
CH-9100 Herisau
Switzerland
Phone [phone]
Fax [phone]
[email protected]
www.metrohm.com
916 Ti‑Touch
Programmversion 5.916.0041
Manual
8.916.8005EN / 2020-03-03

Technical Communication
Metrohm AG
CH-9100 Herisau
[email protected]
This documentation is protected by copyright. All rights reserved.
This documentation has been prepared with great care. However, errors
can never be entirely ruled out. Please send comments regarding possible
errors to the address above.
Documentation in additional languages can be found on
http://documents.metrohm.com.
Melody for the BEEP command: excerpt from "En Altfrentsche", with kind
permission of the Laseyer Quartett, Appenzell.

￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭ Table of contents
916 Ti‑Touch ￭￭￭￭￭￭￭￭ III
Table of contents
1 Introduction 1
1.1 Instrument description ......................................................... 1
1.1.1 Titration and measuring modes ................................................ 1
1.1.2 Connectors .............................................................................. 3
1.1.3 Intended use ........................................................................... 3
1.2 About the documentation ................................................... 4
1.2.1 Symbols and conventions ........................................................ 4
2 Safety instructions 6
2.1 General notes on safety ....................................................... 6
2.2 Electrical safety ..................................................................... 6
2.3 Tubing and capillary connections ........................................ 7
2.4 Flammable solvents and chemicals ..................................... 7
2.5 Recycling and disposal ......................................................... 8
3 Overview of the instrument 9
3.1 Front of the instrument ........................................................ 9
3.2 Rear of the instrument ....................................................... 10
4 Installation 11
4.1 Setting up the instrument .................................................. 11
4.1.1 Packaging .............................................................................. 11
4.1.2 Checks .................................................................................. 11
4.1.3 Location ................................................................................ 11
4.2 Connecting the power supply unit .................................... 11
4.3 Mounting the electrode holder ......................................... 13
4.4 Connecting the propeller stirrer (depending on the
product version) .................................................................. 14
4.5 Connecting MSB devices .................................................... 15
4.5.1 Connecting a dosing device ................................................... 16
4.5.2 Connecting an additional stirrer or titration stand .................. 17
4.5.3 Connecting a Remote Box ..................................................... 17
4.6 Connecting USB devices ..................................................... 18
4.6.1 General ................................................................................. 18
4.6.2 Connecting a USB hub ........................................................... 18
4.6.3 Connecting a printer .............................................................. 18
4.6.4 Connecting a balance ............................................................ 19
4.6.5 Connecting a PC keyboard ..................................................... 20
4.6.6 Connecting a barcode reader ................................................. 21

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4.6.7 Connecting a Sample Processor ............................................. 21
4.7 Connecting sensors ............................................................ 22
4.7.1 General ................................................................................. 22
4.7.2 Connecting a pH, metal or ion-selective electrode .................. 23
4.7.3 Connecting a reference electrode .......................................... 23
4.7.4 Connecting a polarizable electrode ........................................ 24
4.7.5 Connecting the temperature sensor or electrode with inte-
grated temperature sensor ..................................................... 25
4.7.6 Connecting the iConnect ....................................................... 26
4.7.7 Differential potentiometry ...................................................... 29
4.8 Connecting the Ti‑Touch to a network ............................. 30
5 Titrations 31
5.1 Dynamic equivalence point titration (DET) ....................... 31
5.2 Monotonic equivalence point titration (MET) .................. 31
5.3 Endpoint titration (SET) ...................................................... 32
5.4 Titration with constant maintenance of the measured
value (STAT) ......................................................................... 32
5.5 Manual titration (MAT) ...................................................... 33
6 Operation 35
6.1 Switching the instrument on and off ................................ 35
6.2 Fundamentals of operation ............................................... 36
6.2.1 Touch-sensitive screen ........................................................... 36
6.2.2 Display elements and controls ................................................ 37
6.2.3 Status display ......................................................................... 38
6.2.4 Entering text and numbers ..................................................... 39
7 System settings 41
7.1 General system settings ..................................................... 41
7.1.1 Selecting the dialog language ................................................ 41
7.1.2 Setting the date, time and local time ..................................... 42
7.2 System-specific dialog options .......................................... 43
7.3 User administration ............................................................ 46
7.3.1 Editing the user configuration ................................................ 48
7.3.2 Creating an identification profile ............................................ 51
7.3.3 Defining login options ........................................................... 52
7.3.4 Password options .................................................................. 54
7.3.5 Modification options ............................................................. 56
7.3.6 Reasons ................................................................................. 56
7.3.7 Audit Trail .............................................................................. 57
7.4 Measured value display ...................................................... 59
7.5 Acoustic signals .................................................................. 59

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916 Ti‑Touch ￭￭￭￭￭￭￭￭ V
8 Titrants 60
8.1 Adding a new titrant .......................................................... 61
8.2 Editing titrant data ............................................................. 62
8.3 Monitoring the working life .............................................. 64
8.4 Dosing unit .......................................................................... 65
8.4.1 Parameters for preparing (PREP) and emptying (EMPTY) ......... 66
8.4.2 Tubing parameters ................................................................. 68
8.4.3 Shift direction of the valve disk .............................................. 71
8.5 Exchange unit ..................................................................... 71
8.5.1 Parameters for the preparation (PREP) .................................... 73
8.5.2 Tubing parameters ................................................................. 74
8.6 GLP test for exchange unit and dosing unit .................... 75
8.7 Titer determination options and data .............................. 77
8.7.1 Titer validity ........................................................................... 77
8.7.2 Properties of the previous titer determinations ....................... 78
9 Reagents 80
9.1 Editing reagent data .......................................................... 80
9.2 Reagent monitoring ........................................................... 81
10 Sensors 84
10.1 Adding a new sensor ......................................................... 85
10.2 Editing the sensor data ...................................................... 86
10.3 Monitoring the working life .............................................. 87
10.4 Calibration data (for pH electrodes only) ......................... 88
10.4.1 Properties of the previous calibrations .................................... 90
10.5 Limit values for the calibration data ................................. 92
10.6 Monitoring the calibration interval (for pH electrodes
only) ..................................................................................... 93
11 Device manager 95
11.1 Adding a new device .......................................................... 96
11.2 Configuring the instrument ............................................... 96
11.3 Ti‑Touch ............................................................................... 97
11.3.1 E-mail .................................................................................... 98
11.3.2 PC/LIMS report ...................................................................... 99
11.3.3 Shared memory ................................................................... 100
11.3.4 TCP/IP settings ..................................................................... 102
11.4 Metrohm control instruments ......................................... 103
11.4.1 Properties – Measuring input ............................................... 104
11.4.2 Properties – MSB connector ................................................. 105

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11.4.3 Properties – Peripheral devices ............................................. 106
11.5 Sample Processor ............................................................. 106
11.5.1 Properties – Sample Processor .............................................. 107
11.5.2 Properties – Tower ............................................................... 108
11.5.3 Properties – Swing Head ...................................................... 110
11.6 Sample racks ..................................................................... 114
11.6.1 Editing rack data .................................................................. 116
11.6.2 Rack adjustment .................................................................. 122
11.7 Printer ................................................................................ 123
11.7.1 PDF settings ......................................................................... 124
11.7.2 Network printer ................................................................... 125
11.7.3 More options ....................................................................... 127
11.8 Balance .............................................................................. 127
11.9 USB/RS-232 adapter ......................................................... 129
11.10 PC keyboard ...................................................................... 130
11.11 Barcode reader ................................................................. 132
12 File manager 134
12.1 Managing files .................................................................. 134
12.1.1 Copying a file ...................................................................... 136
12.1.2 Renaming a file ................................................................... 136
12.1.3 File properties ...................................................................... 137
12.2 External storage medium ................................................ 138
12.3 Creating backups / Restoring data ................................. 140
12.3.1 Restoring data ..................................................................... 140
13 GLP manager 142
13.1 Automatic system test ..................................................... 143
13.2 Test tools ........................................................................... 143
13.3 GLP tests for measurement and titration ....................... 144
13.3.1 Parameter description .......................................................... 145
13.4 System validation ............................................................. 148
13.4.1 Parameter description .......................................................... 149
13.5 System monitoring ........................................................... 152
13.5.1 Service interval .................................................................... 152
13.5.2 Backup interval .................................................................... 152
14 Common variables 154
14.1 Editing common variables ............................................... 155
14.2 Properties of common variables ..................................... 156
14.3 Monitoring validity ........................................................... 157

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916 Ti‑Touch ￭￭￭￭￭￭￭￭ VII
14.4 Assigning a result automatically to a common varia-
ble ...................................................................................... 158
15 Templates 160
15.1 Sample data ...................................................................... 160
15.1.1 Sample identification list ...................................................... 161
15.1.2 Sample assignment table ..................................................... 162
15.2 Custom result templates .................................................. 164
15.2.1 Editing result templates ....................................................... 165
15.3 Input lines ......................................................................... 168
15.3.1 Editing the input signal ........................................................ 169
15.4 Output lines ...................................................................... 170
15.4.1 Editing the output signal ...................................................... 172
15.5 Custom calibration buffers .............................................. 173
15.5.1 Defining calibration buffers .................................................. 173
15.6 Report header ................................................................... 175
15.7 Custom electrode type ..................................................... 176
15.7.1 Limit values for the electrode rating ..................................... 177
16 Methods 180
16.1 Creating a new method ................................................... 180
16.2 Saving a method ............................................................... 181
16.3 Loading a method ............................................................ 182
16.4 Editing a method .............................................................. 183
16.4.1 Inserting a command ........................................................... 184
16.5 Method options ................................................................ 185
16.5.1 Start options ........................................................................ 186
16.5.2 Stop options ........................................................................ 188
16.5.3 Sample data ........................................................................ 189
16.5.4 Method properties ............................................................... 193
16.5.5 Note .................................................................................... 194
16.5.6 Saving a determination automatically ................................... 195
17 Electronic signatures 197
17.1 Signing methods/determinations electronically ............ 197
17.2 Deleting electronic signatures ......................................... 198
18 Control 199
19 Favorites 203
19.1 Creating favorites ............................................................. 204
19.1.1 Editing favorites ................................................................... 204

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20 Sample data 207
20.1 Entering sample data in the main dialog ....................... 207
20.2 Requesting sample data at the start of the determina-
tion .................................................................................... 208
21 Sample table 210
21.1 General .............................................................................. 210
21.2 Editing sample data ......................................................... 213
21.3 Properties .......................................................................... 215
22 Determination run 218
22.1 Carrying out a single determination ............................... 218
22.2 Performing a sample series ............................................. 219
22.3 Canceling determinations manually ............................... 220
23 Live modifications 221
23.1 Editing the sample data of the running determination 221
23.2 Editing the sample table while a determination is run-
ning .................................................................................... 222
23.3 Live display ....................................................................... 223
23.4 Live parameters ................................................................ 225
24 Results and more determination data 227
24.1 More determination data ................................................ 228
24.1.1 Details ................................................................................. 229
24.2 Messages ........................................................................... 231
24.3 Local common variables .................................................. 232
24.4 Determination properties ................................................ 232
24.5 Loading a determination ................................................. 235
24.5.1 Determination list ................................................................ 236
24.6 Saving a determination .................................................... 240
24.7 Curves ................................................................................ 240
24.8 Recalculation and reevaluation ....................................... 242
25 Statistics 244
25.1 Displaying details for a result .......................................... 246
25.2 Deleting statistical data ................................................... 247
25.3 Adding a determination to a determination series ....... 247

￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭ Table of contents
916 Ti‑Touch ￭￭￭￭￭￭￭￭ IX
26 Result table 249
26.1 Properties .......................................................................... 250
26.2 Saving the result table ..................................................... 254
26.3 Loading the result table ................................................... 254
27 Printing 255
27.1 General report options ..................................................... 257
27.2 Settings of the individual reports ................................... 258
27.3 List of all printable reports .............................................. 259
28 Manual control 263
28.1 Opening and closing the manual control ....................... 264
28.2 Measuring ......................................................................... 265
28.2.1 Parameter description .......................................................... 266
28.3 Dosing ............................................................................... 267
28.3.1 Continuous dosing .............................................................. 270
28.3.2 Dosing fixed volumes ........................................................... 271
28.3.3 Preparing ............................................................................. 274
28.3.4 Emptying ............................................................................. 275
28.3.5 Filling .................................................................................. 275
28.3.6 Replacing reagent ................................................................ 275
28.4 Stirring ............................................................................... 276
28.5 Remote .............................................................................. 278
28.6 Sample Processor ............................................................. 279
28.6.1 Moving the lift ..................................................................... 281
28.6.2 Moving to a rack position .................................................... 283
28.6.3 External positions ................................................................ 284
29 Parameter 289
29.1 Dynamic equivalence point titrations (DET) ................... 289
29.1.1 Start conditions ................................................................... 289
29.1.2 Titration parameters ............................................................ 292
29.1.3 Stop conditions ................................................................... 296
29.1.4 Potentiometric evaluation .................................................... 297
29.1.5 Control instrument .............................................................. 302
29.1.6 Sensor ................................................................................. 302
29.1.7 Dosing device ...................................................................... 304
29.1.8 Stirrer .................................................................................. 304
29.2 Monotonic equivalence point titrations (MET) .............. 305
29.2.1 Start conditions ................................................................... 305
29.2.2 Titration parameters ............................................................ 308
29.2.3 Stop conditions ................................................................... 312
29.2.4 Potentiometric evaluation .................................................... 313

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X￭￭￭￭￭￭￭￭ 916 Ti‑Touch
29.2.5 Control instrument .............................................................. 318
29.2.6 Sensor ................................................................................. 318
29.2.7 Dosing device ...................................................................... 320
29.2.8 Stirrer .................................................................................. 321
29.3 Endpoint titrations (SET) .................................................. 322
29.3.1 Start conditions ................................................................... 322
29.3.2 Control parameters .............................................................. 323
29.3.3 Titration parameters ............................................................ 327
29.3.4 Stop conditions ................................................................... 328
29.3.5 Conditioning ....................................................................... 329
29.3.6 Cell ...................................................................................... 331
29.3.7 Control instrument .............................................................. 331
29.3.8 Sensor ................................................................................. 331
29.3.9 Dosing device ...................................................................... 333
29.3.10 Stirrer .................................................................................. 334
29.4 STAT titrations (STAT) ...................................................... 335
29.4.1 Start conditions ................................................................... 335
29.4.2 Control parameters .............................................................. 336
29.4.3 Titration parameters ............................................................ 339
29.4.4 Stop conditions ................................................................... 340
29.4.5 Monitoring .......................................................................... 342
29.4.6 Control instrument .............................................................. 348
29.4.7 Sensor ................................................................................. 348
29.4.8 Dosing device ...................................................................... 349
29.4.9 Stirrer .................................................................................. 352
29.5 Manual titrations (MAT) ................................................... 353
29.5.1 Dosing parameters .............................................................. 353
29.5.2 Control instrument .............................................................. 354
29.5.3 Sensor ................................................................................. 355
29.5.4 Dosing device ...................................................................... 355
29.5.5 Stirrer .................................................................................. 358
29.6 Measurements (MEAS) ..................................................... 359
29.6.1 Measuring parameters ......................................................... 359
29.6.2 Control instrument .............................................................. 361
29.6.3 Sensor ................................................................................. 362
29.6.4 Stirrer .................................................................................. 363
29.7 Calibration of sensors (CAL) ............................................ 364
29.7.1 Calibration parameters (CAL pH) .......................................... 364
29.7.2 Control instrument .............................................................. 368
29.7.3 Sensor ................................................................................. 368
29.7.4 Stirrer .................................................................................. 369
29.8 Electrode test for pH electrodes (ELT) ............................ 370
29.8.1 Electrode test parameters .................................................... 371
29.8.2 Control instrument .............................................................. 372
29.8.3 Sensor ................................................................................. 372
29.8.4 Stirrer .................................................................................. 373
29.8.5 Additional information ......................................................... 374

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916 Ti‑Touch ￭￭￭￭￭￭￭￭ XI
29.9 Evaluations (EVAL) ............................................................ 376
29.9.1 Fixed endpoint evaluation (EVAL FIX-EP) ............................... 377
29.9.2 pK value and half neutralization potential evaluation (EVAL
pK/HNP) .............................................................................. 378
29.9.3 Minimum and maximum evaluation (EVAL MIN/MAX) .......... 379
29.9.4 Break point evaluation (EVAL BREAK) ................................... 381
29.9.5 Rate evaluation (EVAL RATE) ................................................ 383
29.10 Calculations ....................................................................... 384
29.10.1 Calculations (CALC) .............................................................. 384
29.10.2 Calculations (CALC LIVE) ...................................................... 392
29.10.3 Formula editor ..................................................................... 394
29.11 Reports (REPORT) ............................................................. 400
29.11.1 General report options ......................................................... 400
29.11.2 Settings of the individual reports .......................................... 401
29.11.3 List of reports ...................................................................... 402
29.12 Dosing and Liquid Handling ............................................ 405
29.12.1 Preparing an exchange or dosing unit (PREP) ........................ 405
29.12.2 Emptying a dosing unit (EMPTY) .......................................... 406
29.12.3 Dosing a specified volume (ADD) ......................................... 407
29.12.4 Liquid Handling (LQH) .......................................................... 412
29.13 Communication ................................................................ 415
29.13.1 Scanning remote lines (SCAN) .............................................. 415
29.13.2 Setting remote lines (CTRL) .................................................. 417
29.13.3 Scanning the RS-232 interface (SCAN RS) ............................. 418
29.13.4 Defining RS-232 commands (CONTROL RS) .......................... 419
29.14 Automation ....................................................................... 420
29.14.1 Rotating sample rack (MOVE) .............................................. 420
29.14.2 Moving the lift (LIFT) ............................................................ 422
29.14.3 Controlling pumps (PUMP) ................................................... 423
29.14.4 Resetting the rack (RACK) .................................................... 424
29.14.5 Defining the sample variable (SAMPLE) ................................ 424
29.14.6 Creating a subsequence (SUBSEQ) ....................................... 425
29.15 Miscellaneous commands ................................................ 428
29.15.1 Controlling a stirrer (STIR) .................................................... 428
29.15.2 Pausing the method run (WAIT) ........................................... 429
29.15.3 Scan data (REQUEST) ........................................................... 430
29.15.4 Defining an acoustic signal (BEEP) ........................................ 431
29.15.5 Signing a determination (SIGN) ............................................ 431
29.15.6 Canceling the method run (END) .......................................... 431
30 Operation and maintenance 432
30.1 System initialization ......................................................... 432
30.2 Maintenance ..................................................................... 433
31 Troubleshooting 434
31.1 Editing methods ............................................................... 434

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31.2 Sample table ..................................................................... 434
31.3 Results/Statistics ............................................................... 434
31.4 Printing .............................................................................. 435
31.5 Manual control ................................................................. 435
31.6 Miscellaneous ................................................................... 436
31.7 SET titration ...................................................................... 436
31.8 STAT titration .................................................................... 437
32 Appendix 438
32.1 Dosing unit ........................................................................ 438
32.1.1 Maximum dosing and filling rate .......................................... 438
32.1.2 Default parameters for preparing (PREP) and emptying
(EMPTY) ............................................................................... 438
32.2 Exchange unit ................................................................... 439
32.2.1 Maximum dosing and filling rate .......................................... 439
32.2.2 Default parameters for preparing (PREP) ............................... 439
32.3 Stirring rate ....................................................................... 439
32.4 Balance .............................................................................. 440
32.5 Remote interface .............................................................. 441
32.5.1 Pin assignment of the remote interface ................................ 441
32.6 Result variables as parameter setting ............................ 444
32.7 Electrode calibration with Sample Processors ............... 445
32.8 Stored buffer series for pH calibration ........................... 447
32.8.1 Metrohm ............................................................................. 447
32.8.2 NIST (according to DIN standard 19266, 2015) .................... 448
32.8.3 DIN (according to DIN standard 19267, 2012) ..................... 449
32.8.4 Fisher .................................................................................. 450
32.8.5 Fluka ................................................................................... 451
32.8.6 Mettler Toledo ..................................................................... 452
32.8.7 Beckmann ........................................................................... 453
32.8.8 Radiometer Analytical .......................................................... 454
32.8.9 Baker ................................................................................... 455
32.8.10 Hamilton DURACAL ............................................................. 456
32.8.11 Precisa ................................................................................. 457
32.8.12 Merck CertiPUR 20 / Titrisol ................................................. 458
32.8.13 Merck CertiPUR 25 .............................................................. 459
32.9 Using AuditTrailViewer .................................................... 461
32.9.1 Installing AuditTrailViewer .................................................... 461
32.9.2 Opening the Audit Trail ........................................................ 462
32.9.3 Contents of the Audit Trail ................................................... 463
32.9.4 Filtering the Audit Trail ......................................................... 464
32.9.5 Exporting the Audit Trail ...................................................... 465

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916 Ti‑Touch ￭￭￭￭￭￭￭￭ XIII
32.10 Diagnosis ........................................................................... 465
32.10.1 LCD test .............................................................................. 466
32.10.2 Formatting an external storage medium ............................... 466
32.10.3 Removing an external storage medium ................................ 467
32.10.4 Adjusting the touch screen .................................................. 467
32.10.5 Testing the touch screen ...................................................... 468
32.10.6 Software update (loading program versions and language
files) .................................................................................... 469
32.10.7 Service ................................................................................. 472
32.11 Arithmetic algorithms in the Ti‑Touch ............................ 472
33 Technical specifications 475
33.1 Touch screen ..................................................................... 475
33.2 Measuring inputs .............................................................. 476
33.2.1 Potentiometry ...................................................................... 476
33.2.2 Polarizer .............................................................................. 476
33.2.3 Temperature ........................................................................ 477
33.3 Built-in magnetic stirrer (depending on the product ver-
sion) ................................................................................... 478
33.4 Interfaces .......................................................................... 478
33.5 Power supply .................................................................... 479
33.6 Declarations of Conformity ............................................. 479
33.7 Ambient temperature ....................................................... 479
33.8 Reference conditions ........................................................ 479
33.9 Dimensions ........................................................................ 480
34 Accessories 481
Index 482

Table of figures ￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭
XIV ￭￭￭￭￭￭￭￭ 916 Ti‑Touch
Table of figures
Figure 1 Front 916 Ti‑Touch ............................................................................ 9
Figure 2 916 Ti‑Touch rear ............................................................................ 10
Figure 3 Connecting the power supply unit ................................................... 12
Figure 4 Connecting the propeller stirrer ....................................................... 14
Figure 5 MSB connections ............................................................................ 15
Figure 6 MSB connector ............................................................................... 16
Figure 7 Connecting a pH, metal or ion-selective electrode ........................... 23
Figure 8 Connecting a reference electrode .................................................... 24
Figure 9 Connecting a polarizable electrode (stirrer connector; not available,
depending on the product version) .................................................. 24
Figure 10 Connecting the temperature sensor or electrode with integrated tem-
perature sensor ............................................................................... 25
Figure 11 Plugging in the mini USB adapter cable ........................................... 26
Figure 12 Plugging in the 854 iConnect .......................................................... 27
Figure 13 Removing the protective cap ........................................................... 27
Figure 14 Aligning the guide pin ..................................................................... 28
Figure 15 Attaching the electrode ................................................................... 28
Figure 16 Unplugging the 854 iConnect ......................................................... 29
Figure 17 Connecting the Ti‑Touch to a network ............................................. 30
Figure 18 Reagent dosing for DET ................................................................... 31
Figure 19 Reagent dosing for MET .................................................................. 31
Figure 20 Reagent dosing for SET ................................................................... 32
Figure 21 Reagent dosing for STAT .................................................................. 33
Figure 22 Dosing unit – port assignment ......................................................... 70
Figure 23 Exchange unit – tubing connections ................................................ 75
Figure 24 Directory structure on the external storage medium ....................... 139
Figure 25 Live display "Preparing the dosing unit" ......................................... 274
Figure 26 Live display "Preparing the exchange unit" ..................................... 275
Figure 27 Equivalence point recognition and equivalence point numbering within
windows ....................................................................................... 301
Figure 28 Tubbs method for determining the equivalence point .................... 301
Figure 29 Equivalence point recognition and equivalence point numbering within
windows ....................................................................................... 317
Figure 30 Action "Exit method" or "Cancel command" .................................. 345
Figure 31 Action "Pause" .............................................................................. 345
Figure 32 Action "Wait" ................................................................................ 346
Figure 33 Evaluation of pK value / half neutralization potential ...................... 379
Figure 34 Evaluation of minimum and maximum ........................................... 380
Figure 35 Evaluation of a break point ............................................................ 381
Figure 36 Rotational speed depending on the stirring rate ............................. 440
Figure 37 Connectors of the Remote Box ...................................................... 441
Figure 38 Pin assignment of remote socket and plug ..................................... 441

￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭ 1 Introduction
916 Ti‑Touch ￭￭￭￭￭￭￭￭ 1
1 Introduction
1.1 Instrument description
The 916 Ti‑Touch is a compact titration system for volumetric titration.
This titrator combines in a single device the touch-sensitive color monitor
for convenient and efficient operation, the titration unit and as well as
depending on the product version an integrated stirrer interface for a pro-
peller stirrer. The upper side of the housing offers space for the titrant and
the titration vessel. The titrator is standard-equipped for operation with an
external dosing drive of the 800 Dosino type with a dosing unit. You can,
however, also use a 805 Dosimat with an exchange unit. Thanks to its
compact construction, you can use the 916 Ti‑Touch in a small space as a
stand-alone titrator.
You manage titrants, sensors, methods, etc. conveniently in the internal
memory of the 916 Ti‑Touch. You can also save your files externally
through the USB connector, e.g. on a USB flash drive. On this storage
medium you can not only store your methods and determinations, but
also create a backup together with all of the data and settings of your sys-
tem.
The integrated Ethernet connector is available to you should you wish to
connect your 916 Ti‑Touch to a network. The network connection offers
you the following advantages:
￭Saving data to a PC within the network
￭Printing reports on a network printer
￭Sending displayed messages as e-mails
1.1.1 Titration and measuring modes
The 916 Ti‑Touch supports the following titration and measuring modes.
￭DET
Dynamic equivalence point titration. The reagent is added in variable
volume steps.
Measuring modes:
–pH (pH measurement)
–U (potentiometric voltage measurement)
–Ipol (voltametric measurement with selectable polarization cur-
rent)
–Upol (amperometric measurement with selectable polarization
voltage)

1.1 Instrument description ￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭
2￭￭￭￭￭￭￭￭ 916 Ti‑Touch
￭MET
Monotonic equivalence point titration. The reagent is added in con-
stant volume steps.
Measuring modes:
–pH (pH measurement)
–U (potentiometric voltage measurement)
–Ipol (voltametric measurement with selectable polarization cur-
rent)
–Upol (amperometric measurement with selectable polarization
voltage)
￭SET
Endpoint titration at one or two specified endpoints.
Measuring modes:
–pH (pH measurement)
–U (potentiometric voltage measurement)
–Ipol (voltametric measurement with selectable polarization cur-
rent)
–Upol (amperometric measurement with selectable polarization
voltage)
￭STAT
Titration with constant maintenance of the measured value.
Measuring modes:
–pH (pH measurement)
–U (potentiometric voltage measurement)
￭MAT
Manual titration with manual dosing and manual ending.
Measuring modes (optional):
–pH (pH measurement)
–U (potentiometric voltage measurement)
￭MEAS
Measuring modes:
–pH (pH measurement)
–U (potentiometric voltage measurement)
–Ipol (voltametric measurement with selectable polarization cur-
rent)
–Upol (amperometric measurement with selectable polarization
voltage)
–T (temperature measurement)
￭CAL
pH electrode calibration.
Measuring mode:
–pH (calibration of pH electrodes)
–ELT (Electrode test for pH electrodes)

￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭ 1 Introduction
916 Ti‑Touch ￭￭￭￭￭￭￭￭ 3
1.1.2 Connectors
The 916 Ti‑Touch is equipped with the following connectors:
￭Power connection
For connecting to the power grid using the power supply unit provi-
ded.
￭Two MSB connectors (Metrohm Serial Bus)
For connecting dosing devices, one additional stirrer or a Remote Box.
￭USB connector
For connecting peripheral devices (printer, PC keyboard, etc.), a USB
flash drive or a USB hub.
￭Sensor connectors
One connector each for:
– Potentiometric electrodes (pH, ISE, metal)
– Reference electrodes
– Polarizable electrodes
– Intelligent electrodes (iTrodes)
– Temperature sensors (Pt1000 or NTC)
￭Stirrer connector (depending on the product version)
For connecting a propeller stirrer (only available for the version without
magnetic stirrer).
￭Ethernet connector
For connecting the Ti‑Touch to a network.
1.1.3 Intended use
The 916 Ti‑Touch is designed for usage as a titrator in analytical laborato-
ries. Its main application field is volumetric titration.
This instrument is suitable for processing chemicals and flammable sam-
ples. Therefore, the use of the instrument requires the user to have basic
knowledge and experience in handling toxic and caustic substances.
Knowledge regarding the application of fire prevention measures prescri-
bed for laboratories is also mandatory.

1.2 About the documentation ￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭
4￭￭￭￭￭￭￭￭ 916 Ti‑Touch
1.2 About the documentation
CAUTION
Please read through this documentation carefully before putting the
instrument into operation. The documentation contains information
and warnings which the user must follow in order to ensure safe opera-
tion of the instrument.
1.2.1 Symbols and conventions
The following symbols and formatting may appear in this documentation:
Cross-reference to figure legend
The first number refers to the figure number, the sec-
ond to the instrument part in the figure.
Instruction step
Carry out these steps in the sequence shown.
Method Dialog text, parameter in the software
File ▶ New Menu or menu item
[Next] Button or key
WARNING
This symbol draws attention to a possible life-threat-
ening hazard or risk of injury.
WARNING
This symbol draws attention to a possible hazard due
to electrical current.
WARNING
This symbol draws attention to a possible hazard due
to heat or hot instrument parts.
WARNING
This symbol draws attention to a possible biological
hazard.
CAUTION
This symbol draws attention to possible damage to
instruments or instrument parts.