Technical data

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1.a 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.
Electropneumatic positioners/feedback modules contain electronic components which
can be damaged by exposure to excessive 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 office.