Patent ID: 6230080
Filing Date: 2001-05-08
Classification: G01N

Abstract:
A monitoring system for monitoring a clean room regulating system, comprising:a particle counter comprising a pump having a pumping state for pumping a fluid containing particles, the particle counter producing an analog particle signal corresponding to an amount of particles detected, and producing a pump-state signal corresponding to the pumping state;a signal processor, coupled to the particle counter, that converts the analog particle signal into a first digital signal, converts the pump-state signal into an analog pumping signal, and converts the analog pumping signal into a second digital signal;a host computer that receives the first digital signal and derives the amount of particles detected, receives the second digital signal and derives the pumping state, and monitors the pumping state and the amount of particles detected; anda communication channel that transfers the first digital signal and the second digital signal from the signal processor to the host computer.