Description: A portable tester is provided for reading and displaying the pressure of a gas released from a rock core sample stored within a sealed container and for taking a sample of the released pressurized gas for chemical analysis thereof for subsequent use in a modified direct method test which determines the volume of gas and specific type of gas contained within the core sample. The portable tester includes a pair of low and high range electrical pressure transducers for detecting a gas pressure within a first pressure range of 0--25 psia or a second pressure range of 0--200 psig and for producing an electrical signal related to the detected pressure, a pair of low and high range display units electrically connected to the respective low and high range electrical pressure transducers for receiving the electrical signal produced therefrom and visually displaying the pressure of detected gas in a digital numeric readout, selector valve means in flow communication with the low and high range pressure transducers and having separate flow paths to each of the low and high range pressure transducers and a selector knob for selecting gas flow to one of the flow paths, and control valve means having an inlet port for flow communication to the sealed container, a first outlet port for flow communication to a sample gas canister, a second outlet port in flow communication with the selector valve means for reading the pressure of the flow of gas from the sealed container to either the low range or high range pressure transducers, a third outlet port for venting to the atmosphere gas contained within the sealed container, and a control knob for selecting the flow and non-flow of gas from the inlet port to one of the first, second or third outlet ports.
Date: December 31, 1996
Creator: Garcia, F. Jr. & Schatzel, S.J.
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