Environmental measuring and recording apparatus
First Claim
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1. An environmental measuring and recording apparatus comprising:
- pressure sensing means for sensing of a first environmental condition to obtain a first signal therefrom;
temperature sensing means for sensing of a second environmental condition to obtain a second signal therefrom;
compensation means for compensating the first signal with the second signal to obtain a digital signal thereby;
memory means for storing digital data therein represented by the digital signal; and
program control means for controlling the storage of the digital data in the memory means and for periodically updating the contents of the memory means.
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Abstract
An environmental measuring and recording apparatus includes a pressure transducer for measuring of pressure conditions in an oil reservoir. A temperature transducer is used to measure the temperature to which the pressure transducer is subject. The measured temperature is used to compensate the pressure transducer and a resulting compensated signal is digitized and stored in a memory unit. Because of the extreme environmental conditions in which the electronic apparatus is operating the memory unit has the capabilities of periodically being refreshed and to retain data after the removal of power.
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Citations
12 Claims
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1. An environmental measuring and recording apparatus comprising:
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pressure sensing means for sensing of a first environmental condition to obtain a first signal therefrom; temperature sensing means for sensing of a second environmental condition to obtain a second signal therefrom; compensation means for compensating the first signal with the second signal to obtain a digital signal thereby; memory means for storing digital data therein represented by the digital signal; and program control means for controlling the storage of the digital data in the memory means and for periodically updating the contents of the memory means. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A method for measuring and recording environmental conditions comprising:
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sensing of a first environmental condition to obtain a first signal therefrom; sensing a second environmental condition to obtain a second signal therefrom; compensating the first signal with the second signal to obtain a digital signal thereby; storing digital data that is represented by the digital signal in a memory means; and controlling the storage of the digital data in the memory means and for periodically updating the contents of the memory means. - View Dependent Claims (8, 9, 10, 11, 12)
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Specification