Patent ID: 7086271

Claim:
A method of testing a vacuum detection device, the method comprising: providing a pressure source at a first pressure level; drawing a vacuum relative to an ambient environment with a vacuum generating device, the vacuum generating device including: a member defining a passage extending between a first end and a second end, the first end being in fluid communication with the ambient environment, and the passage including a constriction defining an orifice; a valve having a first port and a second port, the first port being adapted for fluid communication with a pressure source at a first pressure level; and a fluid communication conduit connecting the second end of the member and the second port of the valve, and the fluid communication conduit including a fluid communication tap at a second pressure level; connecting the vacuum detection device to the fluid communication tap; and regulating the second pressure level in response to varying fluid flow through the orifice, the regulating includes adjusting the valve such that a pressure in the fluid communication conduit changes at a first rate during a first portion of a test period, and the pressure in the fluid communication conduit changes at a second rate during a second portion of the test period, and the test period is approximately 30 seconds.