You should calibrate clinical gas analysers at least once every 24 hours or before each testing session to meet ATS/ERS standards. Most modern systems, like the Eagle 3, require a two-point calibration using a certified gas mixture with 0.01% precision. Regular calibration ensures that sensor drift stays below 1% of the full scale. This routine maintenance protects the integrity of your clinical data and ensures your patients’ safety is always the priority.