Do I need to calibrate the EasyOne Air spirometer?
No. All EasyOne products are designed to not require calibration. ndd’s patented TrueFlow technology is the only technology proven to remain stable over its lifetime. A number of independent papers have been published that confirm this long-term stability.
For organizations like NIOSH/OSHA or Social Security/Disability, where calibration checks are required, ndd offers a 3-Liter calibration syringe. A calibration check (cal-check) is not to be confused with calibration. A cal-check simply validates that the device is within calibration limits. Unlike calibration, a cal-check does not adjust the calibration values.