Maintenance - Emerson Fisher 3582i Instruction Manual

Instruction Manual
D200138X012
the beam to pivot about the feedback axis and moving the flapper closer to the nozzle until equilibrium is reached. The
position transmitter output pressure is again proportional to the valve stem position.

Maintenance

Due to normal wear or damage from external sources (such as debris in the supply medium), periodic maintenance or
repair of the valve positioner or valve stem position transmitter may be necessary. Maintenance of these units consists
of troubleshooting, removal for inspection, and replacement of component parts.
WARNING
Avoid personal injury from sudden release of process pressure. Before performing any maintenance operations:
D Always wear protective clothing, gloves, and eyewear when performing any maintenance operations.
D Do not remove the actuator from the valve while the valve is still pressurized.
D Disconnect any operating lines providing air pressure, or a control signal to the actuator. Be sure the actuator cannot
suddenly open or close the valve.
D When disconnecting any of the pneumatic connections, natural gas, if used as the supply medium, will seep from the
unit and any connected equipment into the surrounding atmosphere. Personal injury or property damage may result
from fire or explosion if appropriate preventive measures are not taken. Preventive measures may include, but are not
limited to, one or more of the following: ensuring adequate ventilation and the removal of any ignition sources.
D Use bypass valves or completely shut off the process to isolate the valve from process pressure. Relieve process pressure
on both sides of the valve.
D Use lock‐out procedures to be sure that the above measures stay in effect while you work on the equipment.
D Check with your process or safety engineer for any additional measures that must be taken to protect against process
media.
WARNING
3582i does not meet third party approvals for use with natural gas as the supply medium. Use of natural gas as the supply
medium can result in personal injury or property damage from fire or explosion,
WARNING
For explosion proof applications, disconnect power before removing the converter housing cap in an explosive
atmosphere.
WARNING
When replacing components, use only components specified by Emerson Process Management. Substitution with other
components may result in the positioner or transmitter no longer meeting safety certification requirements and personal
injury or property damage.
Always use proper component replacement techniques. Improper techniques and poor quality repairs can impair the safety
features of the device.
3582, 582i, and 3583
January 2013
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