Accurate Weighing Application
Accurate Weighing
Accurate weighing - Guidelines for accurate results and better weighing techniques
Factors affecting weighing accuracy can have a negative impact on the results of the whole analysis, so it is important to know the rules to be followed when working with laboratory balances.
Weighing is one of the most common, most critical and time-consuming tasks performed in laboratories, so it is vital to carry out weighing correctly.
The scales are so developed that, except for ultra-micro-scales, they no longer require a special weighing chamber.
Technological developments in the field of electronics have significantly simplified the operation of the scales and shortened the weighing times. Touchscreen digital displays allow for more practical use of the scales.
However, this apparent ease of use can neglect the necessary level of maintenance to eliminate the negative effects of various factors affecting weighing accuracy on the analyzes. External effects are defined as measurable physical effects for all laboratory balances. Examples of external influences include:
Static electric forces
Air currents
Vibrations in the environment
Magnetization effects
Evaporation
Dehumidification
The properties of some samples (such as the evaporation of liquids or the water retention / non-retention solids which can become heavier or lighter and heavier) can also be misinterpreted as external influences.
The aim of this manual is to identify the most common factors affecting weighing accuracy and to explain the basic rules of correct weighing with laboratory balances. At the beginning of this manual, recommendations are given on the ideal position of a balance. It then describes how to properly operate these sensitive devices before analyzing possible external effects and their consequences. Most of these effects can be recognized by a slow change (deviation) in the weighing display.
Technologically advanced scales enable the employees in the laboratories to perform weighing operations faster and more practically without the need for a special weighing room.
However, the weighing results may still be inaccurate due to the following elements:
Influence of external elements (eg air currents, magnetization, static electric forces).
Incorrect detection of sample properties
Incorrect use of balance
Choosing an inappropriate location for the balance
Misinterpreting technical data
Following METTLER TOLEDO “Accurate Weighing erg guidelines will help you understand the factors that affect weighing accuracy and how to minimize the possibility of errors during the weighing process.
48Axx
Taylor Precision 7506 Digital Scale