Hand held data collector and analyzer device

Data collector and analyser hand held device capable of collecting and analysing AC analog signals obtained by both converting pressure waves in the ultrasonic or in the non-ultrasonic vibration bandwidths into such signals by an AC transducer either internal and comprised in the device or external and connected to said device, comprising:

• a conditioning circuit comprising a transducer identification circuit arranged for downloading a characteristic of an external transducer and at least a first amplifier, arranged for conditioning an AC analog signal at a desired amplitude,
• a first analog to digital converter arranged for receiving and sampling the conditioned AC analog signal and connected to the said first amplifier,
• a digital signal processing unit arranged for processing a digital signal to produce desired digital data,
• a central processing unit connected to the digital signal processing unit and to the conditioning circuit for controlling their respective operations,
• a user interface connected to the central processing unit and comprising user input and output means,
• wherein the first amplifier of the conditioning circuit is a multistage programmable amplifier arranged for enabling the adjustment of its gain between 0 and a predetermined value by the central processing unit 25 as a function of a characteristic of an AC external transducer, downloaded by the identification circuit, transmitted by the identification unit to the central processing unit and identified by the central processing unit or of a known characteristic of an AC internal transducer if the device comprises such an internal AC transducer.