Buchi DuMaster D-480, Operation Manual, Page: 5 / 354

Operating instructions DuMaster D-480 ©BÜCHI Labortechnik AG
Contents 5
Contents
CHAPTER 1 General 13
About this document .................................................................................................................................... 14
Display conventions .................................................................................................................................... 15
General information on the operating instructions ....................................................................................... 15
CHAPTER 2 Basic security settings 17
Working with the operating instructions ....................................................................................................... 18
Representation of safety instructions .......................................................................................................... 18
Instructions for disposal of consumables ..................................................................................................... 18
Intended use of the instrument .................................................................................................................... 19
Warning: residual risks ................................................................................................................................ 19
Safety devices in the analyzer ..................................................................................................................... 20
Warning signs on the analyzer .................................................................................................................... 22
Warning: changes to the instrument ............................................................................................................ 23
Warning: unsuitable spare parts and consumables ..................................................................................... 23
Required user knowledge and skills ............................................................................................................ 23
Required personal safety equipment ........................................................................................................... 24
Warning notes during operation .................................................................................................................. 24
CHAPTER 3 Product description 31
Analytical characteristics and technical specifications ................................................................................. 32
Analytical characteristics .................................................................................................................. 33
Technical specifications ................................................................................................................... 33
Instrument design ........................................................................................................................................ 35
Front view ........................................................................................................................................ 36
Rear view ......................................................................................................................................... 37
Right side view ................................................................................................................................. 37
Left side view ................................................................................................................................... 38
Top view ........................................................................................................................................... 39
Peripherals and their function .......................................................................................................... 40
CHAPTER 4 Understanding the instrument and planning its use 41
Layout and mode of functioning .................................................................................................................. 42
Functional units ................................................................................................................................ 43
The thermal conductivity detector (TCD) .......................................................................................... 45
Processes in the instrument during a measurement ................................................................................... 46
Sample insertion and initiation of measurement .............................................................................. 47
Substance digestion and preparation of the reaction gas mixture .................................................... 47
Detection of measuring components and evaluation of the measuring signal .................................. 48
Formulas for determining element concentration of analysis samples (Solids) ................................ 48
Basic facts about working with the instrument ............................................................................................. 49
Instrument equipment ...................................................................................................................... 50
Background knowledge required for calibration ............................................................................... 51
Calibration curve calculation method criteria .................................................................................... 52
Calibration formulae ......................................................................................................................... 54
Routine measuring work .................................................................................................................. 55
Formulae for blank value determination and compensation ............................................................. 56
Formula for determining the daily factor ........................................................................................... 57
Understanding the operating software ......................................................................................................... 58
Basic functions of the operating software ......................................................................................... 59
Software user interface .................................................................................................................... 60