Apparatus for monitoring a measurement transmitter of a field device
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United States of America Patent
Stats
-
Mar 18, 2008
Grant Date -
Feb 17, 2005
app pub date -
Apr 2, 2004
filing date -
Apr 2, 2003
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An apparatus for monitoring a measurement transmitter of a field device determining and/or monitoring a physical and/or chemical process parameter, wherein at least one sensor is provided inside the a housing, in which the transmitter is arranged. The sensor determines the temperature and relative humidity in the housing over a period of time in predetermined intervals, and a control-/evaluation-unit is provided, which, on the basis of the measured temperature and relative humidity, determines the absolute humidity and/or the dewpoint in the housing of the transmitter, and issues and alarm when the absolute humidity and/or the dewpoint in the housing of the transmitter reaches a critical value.
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