Routine testing of a moisture analyzer is the regular check of the heating unit, the weighing unit, and the whole moisture analyzer instrument. By regularly testing and, if necessary adjusting the instrument, you will ensure consistent and reproducible results for the entire lifetime of your moisture analyzer. Furthermore, routine testing provides documented evidence of the instrument's correct status. Periodic testing is what quality standards such as ISO 9001 require: "Measuring equipment shall be […] verified […] at specified intervals […]".