Selecting Scale Weights for Calibration Testing

By Rachel Kohn | September 13, 2023
Selecting Calibration Weights

Calibrating precision digital scales, analytical balances and moisture analyzers that rely on accurate weight measurement requires periodic tests using a scale weight closely matching the maximum capacity of the instrument being tested.

Why Testing with Scale Weights is Important

Test weights can be purchased individually or in sets.
Scale weights can be purchased individually or in sets.

Daily we depend on weighing accuracy – such as visits to the deli counter in the supermarket. We want assurance that the weight shown on the scale is accurate. The U.S. Government’s Weights and Measures Division sets the guidelines.

But in research labs and in food, drug and other production facilities, weighing accuracy assumes a highly critical criterion.  This applies to weighing and measuring instruments where readout (the smallest weight difference displayed) and linearity (the ± deviation from the actual weight) are governed by GLP, ISO and other standards.

Adding to challenges, the accuracy of precision weighing and measuring instruments can be … Read the rest

How to Determine Moisture Content

By Rachel Kohn | June 14, 2023
What is a Moisture Analyzer?

Moisture content – the amount of moisture contained in a product – can be determined by using a moisture analyzer.  Specifications for correct moisture content span a host of industries and products.  Here you will learn how moisture analyzers are employed by researchers, QC personnel, professional associations, and government agencies to ensure products meet moisture content specs.  It includes info on how moisture analyzers work along with purchasing and operating tips.      

Why Moisture Content is Critical

According to Title 21 of the Code of Federal Regulations section n, “Safe-moisture level is a level of moisture low enough to prevent the growth of undesirable microorganisms in the finished product under the intended conditions of manufacturing, storage, and distribution.”  

Types of Moisture

While most folks think of moisture as water, moisture is anything that evaporates on heating.  Examples include fats, oils, alcohol, and solvents.

Moreover, moisture can lurk in places you … Read the rest