Method for testing switch in advance pneumatic detector

Abstract

A method for testing a switch in an advance pneumatic detector with a pressure tube includes moving a piston within the pressure tube with a magnet. A pressure of a gas in a portion of the pressure tube is adjusted in response to moving the piston. A state of the switch is monitored.

1 . A method for testing a switch in an advance pneumatic detector with a pressure tube, the method comprising:
 moving a piston within the pressure tube with a magnet;   adjusting a pressure of a gas in a portion of the pressure tube in response to moving the piston; and   monitoring a state of the switch.   
     
     
         2 . The method of  claim 1 , wherein monitoring the state of the switch comprises setting the switch in a test phase in response to the pressure adjustment of the gas in the pressure tube. 
     
     
         3 . The method of  claim 2 , wherein setting the switch in a test phase comprises activating a diaphragm located in the switch in response to the pressure adjustment of the gas in the pressure tube. 
     
     
         4 . The method of  claim 3  further comprising activating an electrical signal to indicate the state of the diaphragm. 
     
     
         5 . The method of  claim 1  further comprising setting the switch into a normal operational phase. 
     
     
         6 . The method of  claim 1  further comprising attaching the magnet to the pressure tube of the advance pneumatic detector. 
     
     
         7 . A method of assembling an advance pneumatic detector, the method comprising:
 placing a piston within a pressure tube of a switch of the advance pneumatic detector;   charging the switch with gas;   hermetically sealing the switch;   calibrating the advance pneumatic detector; and   attaching a magnet to a portion of the pressure tube, wherein the magnet is slidably engaged with the pressure tube.   
     
     
         8 . The method of  claim 7  further comprising installing the advance pneumatic detector onto an aircraft. 
     
     
         9 . The method of  claim 7 , wherein calibrating the advance pneumatic detector comprises adjusting a pressure of an inert gas inside the switch. 
     
     
         10 . The method of  claim 7 , wherein charging the switch comprises inserting an inert gas into the switch and the pressure tube. 
     
     
         11 . The method of  claim 7 , wherein attaching the magnet comprises placing the magnet at an axial location of the pressure tube such that a portion of the magnet is axially aligned with a portion of the piston.