OPSIS - Air Quality Monitoring Calibration Bench System
Calibration is needed to show that the measurement results correspond to reality. If they do not, the instrument readings can be adjusted. There are a number of different products for calibrating OPSIS monitoring systems. Most often, a calibration bench model CB100 is used. It is used together with a light source (CA150/RE060) and a receiver (RE060) at each end of the bench so that a monitoring path is formed along the bench.
Calibration is done by inserting one or more cells with transparent windows into the light path. The calibration gas of known concentration is flowed through the cells. Varying cell lengths or combinations of different cells allow different calibration points to be selected with a single gas source. Zero calibration is done by monitoring on the calibration bench without cells.
Gas cylinders with a traceable and certified gas concentrations are usually used as the gas source. However, some gases cannot be supplied in cylinders, such as ozone. In that case, an OPSIS OC500 ozone calibrator is used to generate a known ozone content.
Examples of applications where these products can be used: