2.9.6.3
SA Due to Inner or Outer or Both EM Coils
Perform this in-factory test by energizing one at a time inner, outer, and
both EM coils to determine the SA provided by inner, outer , and both EM
coils. Perform this test in the factory for each test point and for each
frequency. The SA for each test point due to inner or outer coil shall be
not less than 80 percent of minimum required.
PART 3
EXECUTION
HEMP shielded door manufacturer shall furnish supervision and installation
of work performed under this section.
3.1
HEMP SHIELDED DOOR FRAME AND ASSEMBLIES
Weld door frame to HEMP shield using Metal Inert Gas (MIG) method. Install
HEMP shielded door under direct supervision of HEMP shielded door
specialist and per manufacturer's recommendations. Adopt skip welding
technique to minimize warpage.
3.2
HEMP DOOR FRAME ACCESSIBILITY
Entire periphery including threshold of HEMP shielded door frame where
attached to HEMP shield shall be accessible from inside and outside of
shield for access and future removal with minimum demolition.
3.3
HEMP SHIELDED DOOR INSTALLATION
HEMP shielded door manufacturer shall install the frame and shielded
door(s). Install HEMP shielded door assemblies as complete assemblies in
pre-existing prepared openings. Install in accordance with the approved
shop drawings, and peripherally MIG weld HEMP shielded door to HEMP shield.
Exercise care during installation to prevent damage, especially to
finger-stock (contact fingers) and or RF gaskets. Doors, frames,
thresholds, and associated hardware shall be furnished as preassembled
matched units. Install each unit in its respective door openings in
accordance with the approved shop drawings. Maintain alignment within
tolerances as shown in the approved shop drawings during installation and
tack welding and final welding of the HEMP shielded door assembly to
preclude warpage.
3.4
POST INSTALLATION PROTECTION
During construction phase, opening and closing of HEMP shielded door shall
be kept to a minimum, in order to limit wear on door components,
particularly contact surfaces. Plan operations to keep HEMP shielded door
in a permanently open position, with protection over the sensitive
components, during construction activities. Secure temporary covers of not
less than 15.87-mm 5/8-inch thick plywood to protect exposed RF contacts
from physical damage. Apply easily removable masking or stripable coatings
over contact surfaces to eliminate soiling and corrosion. Remove coatings,
clean contact surfaces with an appropriate environmentally safe and OSHA
approved solvent prior to final acceptance testing. Place threshold
protective ramps over threshold when doors are blocked open. Replace
components that have been damaged during construction phase.
SECTION 13095N
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