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Spirometry Testing Equipment Spirometry testing equipment must meet the 2005 ATS/ERS Standardization of Spirometry specifications for spirometer accuracy and precision (Table 6, page 332) and real-tim... Spirometry Testing Equipment Spirometry testing equipment must meet the 2005 ATS/ERS Standardization of Spirometry specifications for spirometer accuracy and precision (Table 6, page 332) and real-time display size. Spirometers must accept a high specification disposable in-line bacterial and viral filter with minimum proven efficiency for high expiration flow to reduce contamination risk to equipment, Operators, and test subjects. Electronic spirometry data files must include raw, Flow data points, at ? 100 Hz, for each forced expiratory maneuver. A written verification letter pertaining to successful completion of 24 waveform testing is required for each spirometer model prototype as outlined by the 1994 ATS Standardization of Spirometry Update. The spirometry system must have a calibration check routine consistent with the 2005 ATS/ERS Standardization of Spirometry. Graphical displays must provide real-time volume-time and flow-volume curves during the test. These displays must meet or exceed a minimum size. The spirometer software must automatically perform quality assurance checks on expiratory maneuvers during each spirometry testing session. Each spirometer must contain enough active memory to store absolute values from at least 8 maneuvers within one testing session. The spirometry software must have the capacity to save and recall curves and results preferable from all maneuvers, but at a minimum for 3 acceptable maneuvers. The spirometry data file must retain a record of the parameters defined in the 2005 ATS/ERS Standardization of Spirometry (Table 8, page 335). Spirometers that provide electronic transfer of spirometry data results files must use either a NIOSH-approved procedure or the format, content, and data structure specified by the 2005 ATS/ERS Standardization of Spirometry (page 335).