Process transmitter with inner conductive cover for EMI shielding

A transmitter, comprising:

• an electronic module;
• a metallic housing including a housing body and a housing cover, the housing body being adapted to hold the electronic module and having an opening through which the electronic module can be accessed, the housing cover fitting over the opening in a removeable fashion and providing electromagnetic shielding to the electronic module;
• an actuatable switch for modifying a circuit parameter of the electronic module and positioned on the electronic module such that the housing cover must be removed to activate the switch, thereby exposing the electronic module to electromagnetic interference;
• and
• an inner cover positionable over the opening and having a plate and a sleeve surrounding the plate, the sleeve being sized to frictionally mate with the housing body, the plate including a deflectable button portion alignable with the actuatable switch thereby to permit actuation of the actuatable switch;
• wherein the inner cover is electrically conductive and makes galvanic contact with the housing body along the sleeve, thereby to shield the electronics module from electromagnetic interference when the housing cover is removed.