Buchi DuMaster D-480 User Manual Page 58
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Operation Manual D-480 ©BÜCH Labortechnik AG
4 - Understanding the instrument and planning its use 58
Blank value determination
In blank value determination, the peak area values of the blank samples are averaged. The blank
value is computed according to this formula:
where:
/b = blank value
b
i
= peak areas of the individual blank samples
n = number of blank samples
i = index from 1 to n
Blank value compensation
The peak areas of the other samples are compensated with the aid of this formula:
where:
a
comp
= compensated peak area
a = measured peak area of the sample
/b = blank value
Formula for determining the daily factor
Determining the daily factor
Standard samples are analyzed to determine the daily factor. The known element concentration of the
standard samples is correlated with the actual element concentration computed.
Daily factor
The daily factor is computed according to this formula:
whereas:
f = daily factor
c
theo
= theoretical element concentration
c
act
= element concentration computed actually
- DuMaster D-480 1
- Operation Manual 1
- Copyright Note 3 3
- Contents 5
- Contents 6 6
- Contents 7 7
- Contents 8 8
- Contents 9 9
- Contents 10 10
- Contents 11 11
- General 13
- Revision history 14
- About this document 15
- Display conventions 16
- Basic security settings 17
- Warning: residual risks 19
- Gas supply 20
- Temperature monitoring 20
- Instrument casing 20
- Protective earth conductor 21
- Waste gas lines 21
- Warning sign furnace 22
- Warning sign electrical area 22
- Meaning of the warning signs 22
- Safe instrument 23
- Warning 23
- Knowledge and skills 23
- Protective glasses 24
- Protective gloves 24
- Laboratory clothing 24
- Damaged base panel 25
- Gas pressure 25
- Hot instrument parts 25
- Changing mode 25
- Removing reaction tubes 26
- Filling reaction tubes 26
- Filling the drying tube 27
- Product description 29
- 3 - Product description 30 30
- Analytical characteristics 31
- Technical specifications 31
- Dimensions and weights 32
- Electrical and gas supply 32
- Ambient conditions 32
- Instrument design 33
- Front view 34
- Furnace section 35
- Rear view 36
- Right side view 37
- Left side view 38
- Top view 39
- CHAPTER 4 41
- Functional units 43
- Symbols 44
- dosing system (I) 44
- Introduction 48
- Setting device parameters 50
- Instrument equipment 51
- Calibration formulae 55
- Routine measuring work 56
- Instrument blank values 57
- Conditioning samples 57
- Daily factor determinations 57
- Blank value determination 58
- Blank value compensation 58
- Daily factor 58
- Software user interface 61
- Sample view 62
- Sample view input functions 63
- Color coding 63
- Combi view 64
- Statistics view 66
- Calibration view 66
- Status view 67
- Right mouse button function 69
- In dialogs 70
- Further functions 70
- Copyright Note 71 71
- Copyright Note 72 72
- 21 CFR Part 11 functionality 73
- Versioning 74
- Work performed by the system 75
- Conditions for installation 76
- Requirements for operation 76
- Configure analyzer 77
- Defining logon timeout 78
- Creating new sections 79
- LIMS export settings 81
- User administration 83
- Granting authorizations 83
- Defining interfaces 85
- Dialog details 87
- Editing analysis data 88
- Performing checks 90
- Viewing the logbook 92
- Working with the database 93
- Database 94
- Database backup 95
- Starting the database backup 96
- Reorganize database 96
- Analyzer configuration 99
- Reacting to irregularities 99
- Sleep/wake-up behavior 99
- Optimizing data evaluation 101
- Modifying the registration 103
- Printer setup 103
- CHAPTER 6 105
- First-time start-up 107
- General requirements 107
- Specific requirements 108
- Start-up 109
- Connecting peripherals 110
- Peripherals 111
- Configuring the balance 111
- Switching on 114
- Default instrument settings 114
- intake pressure 115
- Flow rate 115
- Shutting down the instrument 116
- Procedure 117
- Safety instruction 118
- Using the instrument 119
- Measurement settings 120
- Keywords 121
- Factory-set key words 121
- Defining custom keywords 121
- Viewing the list 121
- Configuring error handling 124
- Preparing samples 125
- Determining sample weight 126
- Packing samples 127
- Preparing measurement work 129
- Software usage rules 130
- Waking up the instrument 130
- Selecting the operating mode 131
- Viewing method settings 131
- Defining custom methods 131
- Defining the Kjeldahl factor 132
- Copy methods 133
- Settings for sample input 133
- Importing weighing data 134
- Prioritizing urgent samples 134
- What can you optimize? 135
- Performing measurement work 136
- Values for oxygen dosing 137
- Performing measurements 138
- Overview 140
- Purpose 142
- Checklist 142
- Background 143
- Determining blank values 144
- Determining the daily factor 145
- Stopping continuous analysis 147
- Configuring the sample view 149
- Saving the sample view 150
- Loading a sample view 150
- Configure statistics view 150
- Generating statistical data 150
- Statistical data 151
- Manual peak integration 152
- Single peaks 153
- Superimposed peaks 153
- Melted peaks 153
- Manual integratability 154
- Baseline 154
- Integration of single peaks 154
- Configuring the graph view 156
- Configure report 157
- Display print preview 157
- Data backup and printing 158
- Export and import 159
- Exporting LIMS data 160
- Working with documents 161
- Creating new documents 162
- Editing documents 162
- Deleting documents 163
- Finding documents 163
- Finding previous versions 164
- What can you copy? 164
- Selecting cells 164
- Inserting data 164
- Importing documents 165
- Signing documents 165
- What signature is checked? 166
- Checking a signature 166
- Maintaining the instrument 167
- Recommendation 169
- Installing used tubes 171
- Safety instruction 172
- Purpose of conditioning 172
- Types of conditioning 172
- Flushing tubes 173
- Performing the calibration 175
- Defining standard substances 176
- Process 178
- Requirements: 178
- Displayed characteristics 182
- Quality factor "r" 183
- Coefficient "a" 183
- Calibration tables 185
- Suggestion 186
- Replacing the ash crucible 187
- Removing the ash crucible 188
- Furnace area 189
- Top view furnace 189
- Installing the ash crucible 191
- Replacing sealing elements 193
- Removing sealing elements 195
- Ball valve maintenance 196
- Dismantled ball valve 199
- Requirements 202
- Installing the Ni flap 209
- Installing the O 212
- Purpose of cleaning 218
- Cleaning the carousel 218
- Emptying reaction tubes 221
- Filling the combustion tube 222
- Filling the reduction tube 224
- In this section 226
- Filling the drying tubes 234
- Drying tube filling (large) 235
- Repairing the instrument 239
- Software reaction to errors 240
- On-screen error message 240
- Interpreting error code 240
- Performing a system test 241
- Performing a leak test 242
- Leak test procedure 243
- Replacing fuses 243
- Fuse holder 244
- Phase 3: Insert fuses 246
- After a computer crash 247
- Reacting to a power failure 248
- When is this necessary? 251
- Changing the position 251
- Export for support 251
- Exporting analysis data 252
- Menu and dialog descriptions 253
- Dialog descriptions key 254
- File menu 255
- File > New (Command) 256
- Listbox columns 257
- Select version (Dialog) 258
- Save file as (Dialog) 259
- File > Delete (Command) 260
- Sign (Dialog) 261
- Export to LIMS (Dialog) 262
- Configure report (Dialog) 263
- Elements 264
- Further information 264
- Print (Dialog) 265
- Print preview (Dialog) 266
- Printer setup (Dialog) 267
- Open (Dialog) 268
- Load balance file (Dialog) 269
- Configure backup (Dialog) 269
- Clean database (Dialog) 271
- Restore database (Dialog) 271
- Log in as (Dialog) 272
- File > Logoff (Command) 273
- File > Exit (Command) 273
- Edit menu 274
- Edit > Redo (Command) 275
- Edit > Undo (Command) 275
- Edit > Cut (Command) 275
- Edit > Copy (Command) 275
- Edit > Paste (Command) 276
- Swap samples (Dialog) 277
- Edit > Modify (Command) 277
- Set stop tag (Dialog) 278
- View menu 281
- View > Toggle (Command) 282
- Zoom in/out (Dialog) 282
- Configure view (Dialog) 282
- Column properties (Dialog) 283
- Save views (Dialog) 284
- Load views (Dialog) 285
- Delete views (Dialog) 285
- Function 286
- Select columns (Dialog) 288
- System menu 289
- System > Stop (Command) 290
- Feeding (Dialog) 291
- Analysis mode (Dialog) 293
- Windows menu 295
- Toolbar 296
- Weighing window (Dialog) 297
- Options menu 299
- Replace part (Dialog) 301
- Leak test (Dialog) 302
- System test (Dialog) 304
- Error buffer (Dialog) 306
- Error display (Dialog) 306
- Input options (Dialog) 307
- Standard samples (Dialog) 308
- Keywords (Dialog) 309
- Acoustic signals (Dialog) 310
- LIMS settings (Dialog) 311
- "LIMS data" tab 312
- "Identifier" tab: 313
- Device parameters (Dialog) 314
- Method (Dialog) 315
- Error handling (Dialog) 316
- Monthly logbook (Dialog) 319
- Select period (Dialog) 320
- "DEVICE.INI" tab 321
- Configure key value (Dialog) 323
- Math menu 325
- Blank values (Dialog) 326
- Math. > Factor (Command) 327
- Define type of peak (Dialog) 327
- Area assignment (Dialog) 328
- Statistics menu 331
- Calibration menu 334
- Help menu 339
- Help > Content (Command) 340
- Help > Find (Command) 340
- Short cuts 341
- Appendix 343
- Warranty 344
- Warranty on the furnace 345
- 11 - Appendix 346 346
- Smallest workable unit 347
- Required accessories 347
- Optional accessories 348
- 11 - Appendix 349 349
- Index 351 351
- Index 352 352
- Index 353 353
- Index 354 354
- Quality in your hands 356
- Find your BUCHI Contacts: 356
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