Section I. GENERAL
a. his manual describes the physical and functional characteristics of the Magnetic Weapon Sensor (MWS), as
used in the Joint-Service Interior Intrusion Detection System (J-SIIDS). It provides instructions for performing the
maintenance functions prescribed for operator, organizational, and intermediate (direct support and general support)
maintenance categories by the maintenance allocation chart. It includes lists of repair parts and special tools needed to
support all allocated maintenance functions.
b. This manual excludes detailed descriptive and procedural information on other J-S1lDS equipment which may be
used with the MWS. For such information, refer to the reference publications listed in Appendix A.
1-2. Maintenance Forms and Records
Department of the Army forms and procedures used for equipment maintenance will be those prescribed in TM 38750.
1-3. Equipment Serviceability Criteria (ESC)
No ESC technical manual pertains to the MWS.
1-4. Reporting of Errors
a. The reporting of errors, omissions, and recommendations for improving this publication by the individual user is
b. (Army) Reports should be submitted on DA Form 2028 (Recommended Changes to Publications) and forwarded
directly to Commander, U.S. Army Troop Support Command, ATTN: AMSTS-MPP, St. Louis, Missouri 63120.
c. (Air Force) Reports should be submitted on AFTO Form 22 (Technical Order System Publication Deficiency
Report) and forwarded to Headquarters, SAAMA/MMSTR, Kelly AFB, Texas 78241.
d. (Navy) Reports should be submitted on Technical Manual User Activity Comment Sheet and forwarded to Naval
Elect Systems Command, National Center Building 1, ATTN: ELEX-4903, Washington, D.C. 20360.
Section II. DESCRIPTION AND DATA
1-5. Purpose and Use
a. Purpose The function of the MWS is to detect and to signal the unauthorized removal of a weapon from its rack
in a military arms room.
b. Use. The MWS may be used by any military installation or tactical installation worldwide. Once installed, the
MWS operates continuously.
a. Major Components. Table 1-1 lists the major components and other significant elements that comprise a
complete Magnetic Weapon Sensor (MWSI Table 1-1 also coordinates the types and forms of nomenclature used in this
manual. Items listed in table 1-1, and described in the following subparagraphs, are illustrated in figures 1-1 and 1-2.
b. Signal Processor Unit(SPU) Enclosure. The SPU enclosure consists of a cover and a chassis. Both items are
made of 16-gauge steel. Both items-are cadmium plated. The exterior of the cover only has a finish coat of crinkle
textured light gray paint. The chassis is mounted on a wall in the military arms room. It is secured by three 5/16 inch
diameter screws (or other appropriate fasteners). The SPU enclosures provides EMI-shielded electrical terminals to
connect the SPU electronics to the loop sensor and to the J-SI IDS Control Unit. The PWB Assembly is secured to the
chassis by three screws. The cover slides onto the chassis, and is secured by two captive screws. The top of the cover
is slotted to accommodate an electrical conduit connection to the chassis. The bottom of the cover is slotted to allow
passage of the input ends of the loop sensor. A rubber grommet in this slot prevents damage to the loop sensor wire
insulation. When the cover is assembled to the chassis, all electrical terminals are made inaccessible. A plastic gasket,
with a metal edging, is adhered to the inside front of the cover. Tightening the cover screws compresses this gasket
against the front rim of the chassis. This results in a metal-to-metal