Avoiding errors when using analytical balances – or for that matter any weighing instrument – involves the coming together of several practices on the part of the user. This post focuses on assuring accurate weighing results when using analytical balances with readouts (what is displayed on the instrument) to milligrams. For an analytical balance such as the KERN ABT 120-4M available from Tovatech it is 0.1 milligram. Semi-micro balances can display to micrograms or 0.01 milligram.
Accuracy is paramount when weighing to these levels with analytical balances and is often subject to regulation by organizations such as the FDA and professional trade associations. Technicians must institute practices and procedures to avoid weighing errors and to insure that the displayed weight precisely reflects the weight of the sample.