The simulated TGV test is useful to verify if the TGV measurement meets the accuracy requirements, through the
Erlenmayer flask standardized method.
To perform this check, please prepare the flask as described in J. Wanger et al.: Standardisation of Lung Volume
Measurement, Eur.Resp.J, 2005, 26, 511-522 and reported below.
Fill a flask of known volume with thermal mass (e.g. copper wool) in order to simulate the isothermal conditions within
the lung. The accuracy of adult plethysmographs in measuring the gas volume of the container should be 50 mL or 3%,
whichever is greater, based on a mean of five determinations.
Connect the flask to the PNT and close the box door.