MIL-STD PDF + Print Form Center) (NPFC); Page Count: 1; ANSI Approved: No; DoD Adopted: No; FSC Code: EMCS - Electromagnetic Compatibility. Title: MIL-STDB NOTICE-1, Version: B, Date: Jan, Status: Active, Desc: (NOTICE 1) INTERFACE HIGH-ALTITUDE ELECTROMAGNETIC PULSE. (CSOG) to oversee implementation of DoD-CBRN survivability policy; ensure CBRN MIL-STDC, HEMP Environment Standard (Classified) defines.
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Standards. ▫ MIL-STDB (classified). - HEMP Environment (classified). ▫ MIL- STD - HEMP Hardening (Fixed Facilities). ▫ MIL-STD This document incorporates the requirements of MIL-STDC and. MIL-STD- B, which provide DOD EMP guidance. SUBJECT. Find the most up-to-date version of MIL-STD at Engineering
Severe shock, vibration, heat, humidity and airborne contaminants are common in land, sea and air platforms.
Coupled with dense packaging, high-power radio and radar illumination, Hazards of Electromagnetic Radiation to Ordnance HERO , and a possible electromagnetic pulse EMP , the military equipment environmental requirements can be extreme indeed.
In order to expedite equipment availability and reduce cost, the acquisition of commercial-off-the-shelf COTS equipment for US military applications is an attractive consideration.
But many types of commercial equipment are unlikely to meet all military environmental requirements as manufactured, so some modification or re-design is usually needed.
The full cycle of US military product development from environmental assessment, to definition of requirements, to test reports, is carefully spelled out in the relevant military standards or ancillary documents for the applicable physical and electromagnetic environments.
These provide the design guidance, along with competent engineering practices, for a cost-effective and robust military product design.
The starting point for EMC is self-compatibility, where the final product or system does not interfere with its own operation. As we shall see, this is the modest starting point for military EMC, which extends to both lower and higher frequencies than most commercial EMC standards and to both lower emission limits and much higher susceptibility requirements.
Test methods generally differ from their commercial counterparts in both setup and detail. History of Military EMC EMC problems in commercial applications were first noted worldwide in the s, when early broadcast radios were being installed in automobiles.
Reception was degraded by ignition noise and electrostatic buildup caused by non-conductive rubber tires. An intentional or inadvertent hole, crack, opening, or other discontinuity in the HEMP shield surface.
Intentional aperture POEs are provided for personnel and equipment entry and egress and for fluid flow ventilation and piped utilities through the electromagnetic barrier. An electrical wire or cable or other conductive object, such as a metal rod, that passes through the electromagnetic barrier.
Conducting POEs are also called penetrating conductors. A test method for measuring the electromagnetic responses induced on an electromagnetic barrier and other items of interest e.
All unscheduled maintenance actions. HEMP corrective maintenance action is undertaken when excessive degradation or failure of a hardness critical item is detected, to restore the HEMP protection to a satisfactory condition and level of performance. Corrective maintenance includes removal of the defective item, repair or replacement, reassembly, and checkout of the completed work.
The topologically closed surface created to prevent or limit HEMP fields and conducted transients from entering the enclosed space. The electromagnetic barrier consists of the HEMP shield and POE treatments, and it encloses the protected volume and special protective volumes, if required.
A treatment to prevent excessive electromagnetic field leakage at an aperture POE. Examples of closure techniques at a seam between two metal plates include welding, brazing, or soldering and metal-to-metal contact under pressure applied with a mechanical fastening.