Removable magnetic zero/span actuator for a transmitter
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United States of America Patent
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-
Nov 29, 1994
Grant Date -
N/A
app pub date -
Nov 13, 1992
filing date -
Nov 13, 1992
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A magnetic actuator for adjusting the zero and span settings of a transmitter used in industrial process control systems. The actuator has a single magnet in a housing. The actuator is removable from the transmitter. When the actuator is unactuated the magnet is in a null position wherein it does not actuate either the zero or span setting reed switches. The magnet can be moved to either a first position wherein it actuates the zero setting reed switch or a second position wherein it actuates the span setting reed switch. The actuator applies a torque in the proper direction to return the magnet to the null position when the torque applied to move the magnet to either the first or second position is removed.
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