According to American Thoracic Society/European Respiratory Society (ATS/ERS) standards, spirometers used to measure vital capacity should have an accuracy range (in body temperature and ambient pressure, saturated [BTPS]) of:

a Option. 0 Option.5 to 5 L +/ 10% of the reading or 50 mL, whichever is greater

b Option. 0 Option.5 to 6 L +/ 5% of the reading or 50 mL, whichever is greater

c Option. 0 Option.5 to 8 L +/ 3% of the reading or 50 mL, whichever is greater

d Option. 0 Option.5 to 12 L +/ 3% of the reading or 50 mL, whichever is greater