Metrohm 900 Touch Control Manual User Manual Page 501
- Page / 541
- Table of contents
- TROUBLESHOOTING
- BOOKMARKS
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31 Troubleshooting
900 Touch Control
￭￭￭￭￭￭￭￭
485
Problem Cause Remedy
The titration time is
too long.
The control parameters are
unsuitable.
Adjust the control parameters (see Chapter
29.3.2, page 310):
￭ Select Titration rate = optimal or fast.
￭ Define Titration rate = user and reduce
the control range.
￭ Define Titration rate = user and increase
the maximum rate (Max. rate).
￭ Define Titration rate = user and increase
the minimum rate (Min. rate).
The results are
spread widely.
The minimum dosing rate
is too high.
Define Titration rate = user and reduce the
minimum rate (Min. rate) (see Chapter
29.3.2, page 310).
The control range is too
small.
Define Titration rate = user and increase the
control range.
The electrode responds too
slowly.
Replace the electrode.
31.8 Karl Fischer titration
Problem
Cause Remedy
The drift is very high
during conditioning.
The titration cell is leaking. ￭ Check seals and septum. If necessary,
replace.
￭ Replace the molecular sieve.
The drift becomes
greater after each
titration.
The sample releases water
very slowly.
￭ Adjust the method.
￭ Add solubility promoter.
￭ Increase the temperature (possibly using a
KF oven).
￭ See technical literature.
A side reaction is taking
place.
￭ Use special reagents.
￭ Adjust the method (increase/decrease the
temperature, external extraction).
￭ See technical literature.
The pH value is not in the
optimum range anymore.
Add buffer, see technical literature.
The titration will not
be finished.
The titration cell is leaking. ￭ Check seals and septum. If necessary,
replace.
￭ Replace the molecular sieve.
- 900 Touch Control 1
- Table of contents 5
- 7 System settings 22 6
- 8 Titrants 41 6
- 9 Reagents 61 6
- 10 Sensors 66 6
- 11 Device manager 79 7
- 12 File manager 119 7
- 13 GLP manager 127 8
- 14 Common variables 139 8
- 15 Templates 145 8
- 16 Methods 165 8
- 25 Statistics 229 10
- 26 Result table 234 10
- 27 Printing 240 10
- 28 Manual control 248 10
- 29 Parameters 276 11
- 31 Troubleshooting 482 14
- 32 Appendix 488 14
- 34 Warranty (guarantee) 517 15
- 35 Accessories 519 15
- Index 521 15
- Table of figures 16
- 1 Introduction 17
- 1.3 About the documentation 19
- 2 Safety instructions 21
- 2.5 Recycling and disposal 23
- 3 Overview of the instrument 24
- 3 Overview of the instrument 25
- 4 Installation 26
- 5 Titrations 27
- 5.3 Endpoint titration (SET) 28
- 6 Operation 31
- 6.2.1 Touch-sensitive screen 33
- 6.2.3 Status display 34
- 7 System settings 38
- 7.3 User administration 44
- 7.3.3 Defining login options 49
- 7.3.4 Password options 51
- 7.3.5 Modification options 53
- 7.3.6 Reasons 54
- 7.3.7 Audit Trail 55
- 7.4 Measured value display 56
- 7.5 Acoustic signals 56
- 8 Titrants 57
- 8.1 Adding a new titrant 58
- 8.2 Editing titrant data 59
- 8.4 Dosing unit 62
- 8.4.2 Tubing parameters 64
- 8 Titrants 67
- 8.5 Exchange unit 68
- 8.5.2 Tubing parameters 70
- 8.7.1 Titer validity 74
- 9 Reagents 77
- 9.1 Editing reagent data 78
- 9.2 Reagent monitoring 78
- 10 Sensors 82
- 10.1 Adding a new sensor 83
- 10.2 Editing the sensor data 84
- 11 Device manager 95
- 11.1 Adding a new device 96
- 11.3 Touch Control 97
- 11.3.1 E-mail 98
- 11.3.2 PC/LIMS report 99
- 11.3.3 Shared memory 100
- ￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭ 101
- ￭￭￭￭￭￭￭￭ 101
- 11.3.4 TCP/IP settings 102
- 11.4 Metrohm control devices 103
- 11.5 USB Sample Processor 107
- 11.5.2 Properties – Tower 109
- 11.6 Sample racks 115
- 11.6.1 Editing rack data 117
- 11.6.2 Rack adjustment 123
- 11.7 Printer 124
- 11.7.1 PDF settings 125
- 11.7.2 Network printer 126
- 11.8 Balance 128
- 11.9 USB/RS-232 adapter 130
- 11.10 PC keyboard 131
- 11.11 Barcode reader 133
- 12 File manager 135
- 12.1.1 Copying a file 137
- 12.1.2 Renaming a file 137
- 12.1.3 File properties 138
- 12.2 External storage medium 139
- 12.3.1 Restoring data 141
- 13 GLP manager 143
- 13.1 Automatic system test 144
- 13.2 Test tools 144
- 13.3.1 Parameter description 146
- 13.4 System validation 149
- 13.4.1 Parameter description 150
- 13.5 System monitoring 153
- 13.5.2 Backup interval 154
- 14 Common variables 155
- 14.3 Monitoring validity 158
- Save the settings 160
- 15 Templates 161
- 15.2 Custom result templates 165
- 15.3 Input lines 169
- 15.4 Output lines 171
- 15.6 Report header 176
- 15.7 Custom electrode type 177
- Input range 0 - 999 s 180
- Default value 60 s 180
- 16 Methods 181
- 16.2 Saving a method 182
- 16.3 Loading a method 183
- 16.4 Editing a method 184
- 16.4.1 Inserting a command 185
- 16.5 Method options 186
- 16.5.1 Start options 187
- 16.5.2 Stop options 189
- 16.5.3 Sample data 190
- 16.5.4 Method properties 194
- 16.5.5 Note 196
- 17 Electronic signatures 198
- 18 Control 200
- Continue the sample series 203
- 19 Favorites 204
- 19.1 Creating favorites 205
- 20 Sample data 208
- 21 Sample table 211
- 21.2 Edit the sample data 214
- 21.3 Properties 216
- 22 Determination run 219
- 23 Live modifications 222
- 23.3 Live display 224
- 23.4 Live parameters 226
- 24.1 More determination data 229
- 24.1.1 Details 230
- 24.2 Messages 232
- 24.3 Local common variables 233
- 24.5 Loading a determination 236
- 24.5.1 Determination list 237
- 24.6 Saving a determination 241
- 24.7 Curves 241
- 25 Statistics 245
- 26 Result table 250
- 26.1 Properties 251
- 26.2 Saving the result table 255
- 27 Printing 256
- 27.1 General report options 258
- 28 Manual control 264
- 28.2 Measuring 266
- 28.2.1 Parameter description 267
- 28.3 Dosing 270
- 28.3.1 Continuous dosing 272
- 28.3.2 Dosing fixed volumes 274
- 28.3.3 Preparing 276
- 28.3.4 Emptying 277
- 28.3.5 Filling 278
- 28.3.6 Replacing reagent 278
- 28.4 Stirring 279
- 28.6 Remote 281
- 28.7 USB Sample Processor 282
- 28.7.1 Moving the lift 284
- 28.7.3 External positions 288
- 29 Parameters 292
- 29.1.2 Titration parameters 295
- 29.1.3 Stop conditions 299
- 29.1.5 Control device 305
- 29.1.6 Sensor 306
- 29.1.7 Dosing device 307
- 29.1.8 Stirrer 308
- 29.2.1 Start conditions 309
- 29.2.2 Titration parameters 312
- 29.2.3 Stop conditions 315
- 29.2.5 Control device 321
- 29.2.6 Sensor 322
- 29.2.7 Dosing device 323
- 29.2.8 Stirrer 324
- 29.3.1 Start conditions 325
- 29.3.2 Control parameters 326
- 29.3.3 Titration parameters 330
- 29.3.4 Stop conditions 331
- 29.3.5 Conditioning 332
- 29.3.6 Cell 334
- 29.3.7 Control device 334
- 29.3.8 Sensor 334
- 29.3.9 Dosing device 336
- 29.3.10 Stirrer 337
- 29.4.1 Start conditions 337
- 29.4.2 Control parameters 339
- 29.4.3 Titration parameters 342
- 29.4.4 Stop conditions 343
- 29.4.5 Conditioning 344
- 29.4.6 Cell 346
- 29.4.7 Control device 346
- 29.4.8 Sensor 347
- 29.4.9 Dosing device 348
- 29.4.10 Stirrer 349
- 29.5.1 Control parameters 350
- 29.5.2 Titration parameters 352
- 29.5.3 Stop conditions 353
- 29.5.4 Conditioning 353
- 29.5.5 Cell 356
- 29.5.6 Control device 357
- 29.5.7 Sensor 357
- 29.5.8 Stirrer 358
- 29.6.1 Control parameters 359
- 29.6.2 Titration parameters 362
- 29.6.3 Stop conditions 363
- 29.6.4 Conditioning 363
- 29.6.5 Cell 365
- 29.6.6 Control device 366
- 29.6.7 Sensor 366
- 29.6.8 Stirrer 367
- 29.7 STAT titrations (STAT) 368
- 29.7.2 Control parameters 370
- 29.7.3 Titration parameters 372
- 29.7.4 Stop conditions 374
- 29.7.5 Monitoring 375
- 29.7.6 Control device 382
- 29.7.7 Sensor 382
- 29.7.8 Dosing device 383
- 29.7.9 Stirrer 386
- 29.8 Manual titrations (MAT) 387
- 29.8.2 Control device 388
- 29.8.3 Sensor 388
- 29.8.4 Dosing device 389
- 29.8.5 Stirrer 392
- 29.9 Measurements (MEAS) 393
- 29.9.2 Standard addition 397
- 29.9.3 Control device 401
- 29.9.4 Sensor 401
- 29.9.5 Stirrer 403
- 29.10.4 Control device 413
- 29.10.5 Sensor 413
- 29.10.6 Stirrer 414
- 29.11.2 Control device 417
- 29.11.3 Sensor 418
- 29.11.4 Stirrer 419
- 29.11.5 Further information 419
- 29.12 Evaluations (EVAL) 421
- Measured value 427
- Volume / Time 427
- 29.13 Calculations 431
- 29.13.3 Formula editor 440
- 29.13.3.3 Variable list 443
- 29.14 Reports (REPORT) 446
- 29.14.3 List of reports 448
- 29.16 Communication 478
- 29.17 Automation 483
- 29.18 Miscellaneous commands 492
- 29.18.3 Scan data (REQUEST) 493
- 30 Operation and maintenance 496
- 31 Troubleshooting 498
- 31.4 Printing 499
- 31.5 Manual control 499
- 31.6 Miscellaneous 500
- 31.7 SET titration 500
- 31.8 Karl Fischer titration 501
- 31.9 STAT titration 503
- 32 Appendix 504
- 32.2 Exchange unit 505
- 32.3 Stirring rate 505
- -15 -10 -5 0 5 10 15 506
- 32.8 Using AuditTrailViewer 514
- 32.9 Diagnosis 519
- 32.9.9 Service 527
- 33 Technical specifications 530
- 33.2 Interfaces 531
- 33.3 Power supply 531
- 33.4 Safety specifications 531
- 33.6 Ambient temperature 532
- 33.7 Dimensions 532
- 34 Warranty (guarantee) 533
- 35 Accessories 535
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