Test Chamber—A test chamber, air bag, or box with an
opening, a removable mounting panel, or one open surface in
which or against which the specimen is installed. Provide at
least two static pressure taps located at diagonally opposite
corners to measure the chamber pressure such that the reading
is unaffected by the velocity of the air supply to or from the
chamber or any other air movement. The air supply opening
into the chamber shall be arranged so that the air does not
impinge directly on the test specimen with any significant
velocity. A means of access into the chamber to facilitate
adjustments and observations after the specimen has been
installed is optional