The invention relates to an apparatus for monitoring a field device for determining and/or monitoring a physical and/or chemical process parameter of a process medium with a first sealing stage facing toward the process and at least one housing with a predetermined interior volume. The housing is lo
The invention relates to an apparatus for monitoring a field device for determining and/or monitoring a physical and/or chemical process parameter of a process medium with a first sealing stage facing toward the process and at least one housing with a predetermined interior volume. The housing is located on the side of the first sealing stage facing away from the process, wherein energy is transferable through the first sealing stage 4 in the direction of the process medium. This energy interacts with the process medium, wherein at least one detector unit is provided in the housing, which unit monitors at least one condition parameter of the interior volume of the housing. A control/evaluation device determines, on the basis of the energy interacting with the process medium, the physical and/or chemical process parameter, and wherein the control/evaluation unit and/or another monitoring unit recognizes and/or seals off and/or issues an alarm, on the basis of the monitored condition parameter in the interior volume of the housing, as soon as the monitored condition parameter in the interior volume of the housing a predetermined limit value.
대표청구항▼
The invention claimed is: 1. An apparatus for monitoring a field device for determining and/or monitoring a physical and/or chemical process parameter of a process medium, comprising: a first sealing stage facing toward the process medium; at least one housing with a predetermined interior volume,
The invention claimed is: 1. An apparatus for monitoring a field device for determining and/or monitoring a physical and/or chemical process parameter of a process medium, comprising: a first sealing stage facing toward the process medium; at least one housing with a predetermined interior volume, which housing is located on the side of said first sealing stage facing away from the process medium; said energy interacts with the process medium; at least one detector unit is provided in said housing, which unit monitors at least one condition parameter of the interior volume of said housing; and a control/evaluation device determines, on the basis of the energy interacting with the process medium, the physical and/or chemical process parameter, wherein: energy is transferable through said first sealing stage in the direction of the process medium; and said control/evaluation unit and/or another monitoring unit recognizes and/or reports, on the basis of the monitored condition parameter in the interior volume of said housing, whether said sealing stage is sealing said housing against the process, and/or issues an alarm as soon as the monitored condition parameter in the interior volume of said housing reaches a predetermined limit value. 2. The apparatus as claimed in claim 1, further comprising: a transmitter, wherein: said housing is provided between said first sealing stage and said transmitter, in which at least one electric and/or electronic component of the field device is arranged. 3. The apparatus as claimed in claim 2, wherein: said housing and said transmitter, for the incorporation of said at least one electric and/or electronic component of the field device, are connected with each other by a connecting line. 4. The apparatus as claimed in claim 1, further comprising: a sensor, wherein: said housing separates, or sets apart, said transmitter from said sensor for registering the physical and/or chemical process parameter, or from the process. 5. The apparatus as claimed in claim 4, further comprising: a second sealing stage, wherein: said first sealing stage is located in the end of said housing facing the process medium; and said second sealing stage is provided in the end of said housing that faces away from the process medium. 6. The apparatus as claimed in claim 1, wherein: said housing comprises the transmitter, in which the at least one electrical and/or electronic component of the field device is located. 7. The apparatus as claimed in claim 5, further comprising: a remote control station, wherein: said second sealing stage is arranged between said transmitter and said remote control station. 8. The apparatus as claimed in claim 5, wherein: said first sealing stage and/or said second sealing stage is/are gas-tight. 9. The apparatus as claimed in claim 1, further comprising: a detector unit, wherein: said detector unit is integrated into said housing, said transmitter, or a connecting tube of said housing. 10. The apparatus as claimed in claim 9, wherein: said detector unit is embodied as an add-on module, which is adaptable to said housing, said transmitter or said connecting tube. 11. The apparatus as claimed in claim 9, wherein: at least one part of said transmitter, said housing or said connecting tube is under negative pressure; and said detector unit is one of: a pressure measuring device, a vacuum switch and/or a pressure switch. 12. The apparatus as claimed in claim 9, wherein: at least one part of said transmitter, said housing or said connecting tube is under positive pressure; and said detector unit is a pressure measuring device and/or a pressure switch. 13. The apparatus as claimed in claim 9, wherein: provided in said detector unit is a movable unit, which moves out of a rest position, as soon as the monitored condition parameter inside said transmitter, said housing or said connecting tube reaches a predetermined limit value. 14. The apparatus as claimed in claim 9, wherein: a part of said transmitter, said housing or said connecting tube and said detector unit form a modular unit. 15. The apparatus as claimed in claim 9, wherein: present at least in a part of said transmitter, said housing and/or said connecting tube is an intermediate medium, which differs from media present in a container, especially the process medium; and said detector unit is embodied such that it monitors the intermediate medium. 16. The apparatus as claimed in claim 15, wherein: said intermediate medium comprises a gas; and said detector unit comprises a corresponding gas sensor.
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이 특허에 인용된 특허 (8)
Neil T. Wilkie ; Michael L. Tupputo, Apparatus and method for liquid level measurement in a sounding tube.
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