What is the optical calibration insert and how can it not change or be degraded with time?
The calibration process provides a “reference” calibration. Once the Microdust pro instrument is correctly adjusted, a small insert is made, which consists of a piece of optical glass with particular physical characteristics. When this is inserted into the sampling volume, the infrared light is scattered and a value is displayed on the instrument. As the optical glass will not degrade with time (the only way to degrade it is to destroy it), the reference standard will always provide a calibration back to factory settings.
