EP5 Electro Pneumatic Digital Positioner FCD PMENIM0006-00-A5 12/18
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2. Storage instructions
PMV Positioner and feedback module storage and handling procedures
PMV Positioners and feedback modules are precision instruments which should be stored and
handled accordingly to avoid problems or damage.
Electro-pneumatic positioners/feedback modules contain electronic components which can be
damaged by exposure to water. Appropriate precautions should be taken to protect units while in
storage.
Warehouse storage
Stored in original PMV shipping containers, units should be stored in an environmentally controlled
area, i.e. clean, cool (15-26°C, 60-80°F) and dry, out of direct sunlight or weather exposure.
Field storage
Note: Once the air supply to the positioner is connected and turned on, internal air bleed will
prevent the ingress of moisture and protect the unit from corrosion. It is recommended that the air
supply be left on at all times.
• If units are installed immediately, turn, and leave on, the air supply.
• If positioners must be stored outdoors, tighten all covers which may have loosened in shipment,
make sure all open enclosure entry points are sealed.
Feedback modules should have cover tightened and conduits entries sealed. Positioners/Feedback
modules should be wrapped and sealed air and watertight with desiccant inside the plastic, units
should be securely covered with an opaque cover and not exposed to direct sunlight, rain or snow.
Pneumatic positioners
Units should have all ports sealed and be protected from direct exposure to weather.
For long term storage (>1 month) or overseas shipment units should be protected with plastic and
desiccant.
Potential damage mechanism
When units are stored in hot, humid climates, the daily heating/cooling cycle will cause air to
expand/contract and be drawn in and out of the positioner/feedback housing.
Dependent on the local temperature variations, humidity and dew points and time in storage
condensation could occur and accumulate inside on the I/P Converter causing erratic operation
or failure due to water and corrosion. The potential for condensation damage is especially high in
southern climates and aggravated if units are exposed to direct sunlight.
For further assistance, please contact you nearest PMV ofce.
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