Method and apparatus for checking the functions of a display system
Heat pump monitor apparatus for fault detection in a heat pump system
Detection of catastrophic failure of dielectric, improper connection, and temperature of a printed circuit assembly via one wire Patent #: 4577149
ApplicationNo. 07/026014 filed on 03/16/1987
US Classes:700/81, Self-test702/108, TESTING SYSTEM702/116, Of sensing device714/712, Transmission facility testing714/735Device response compared to input pattern
ExaminersPrimary: Smith, Jerry
Assistant: MacDonald, Allen R.
Attorney, Agent or Firm
International ClassesG05B 9/02 (20060101)
G05D 23/20 (20060101)
G05D 23/24 (20060101)
B05C 11/10 (20060101)
AbstractA method of checking to determine (a) whether the heating elements and temperature sensors of the various components of a hot melt heating and dipensing system, such as, hot melt dispensers, hoses, and associated reservoir and manifold, are connected in proper circuit configuration, (b) whether any of the heating circuits are in an open-circuit condition and/or their respectively associated signal-controlled switches which control energization of the heaters thereof are short circuited, and (c) whether any of the temperature sensors are open-circuited. The checking is performed by a microprocessor having multiple channels to different ones of which are connected the sensors and signal-controlled switches of the different system components.