- Metrology in Laboratory

RADWAG - Specials
Voor laboranten en specialisten op laboratoria

gehele document "Metrology in Laboratory" in pdf  (175 pagina's)

1. Introduction                                    
2. Metrological infrastructure
3. Basic meteorological concepts for mass measurement
4. Metrology of mass measurements
4.1. Measuring systems of electronic balances
4.2. Theory of errors
4.3. Mass measurement for electronic balances
4.4. Diagram of weighing process
4.5. When is the measurement accurate?
4.6. Selecting a balance for particular purpose
4.6.1. Repeatability of indications
4.6.2. Repeatability – semi-automatic testing method
4.6.3. Linearity
4.6.4. The reference mass standard parameters during linearity testing
4.6.5. Centricity in mass measuring
4.6.6. Stability of sensitivity in time
5. Measuring system analysis (MSA)
5.1. MSA for mass measurement
5.2. MSA for moisture determination
6. Mass standards vs. weights
7. Air density in mass determination
7.1. Buoyancy force
7.2. Estimation of errors resulting from the buoyancy force
7.3. Practical aspects of correction of the buoyancy force influence on the measurement result.
7.4. The buoyancy force value while weighing materials of different density
7.5. The methods of the buoyancy force correction used in RADWAG balances
7.5.1. Method 1: a semi-automatic method using mass standards
7.5.2. Method 2: automatic method using the sensors
7.5.3. Balances with integrated environment sensors
7.5.4. The methods comparison
8. Gravimetric method of the samples density determination
8.1. Physical phenomena in density determination
8.2. Weighing methods used for the body density determination
8.2.1. Pycnometer method
8.2.2. Aerometric method
8.2.3. Oscillating method
8.2.4. Hydrostatic method
8.3. Methodology in hydrostatic measurements of density determination
8.4. Gravimetric density determination of porous solids
8.5. Pycnometric density determination of porous solids
8.6. ‘Floating’ bodies density determination
8.7. Density determination of high viscosity fluids



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