Section
I.
DESCRIPTIONAND DATA
1-1.
Description.
a. General Information.The Mine DetectingSet, Model 156-PMD, shown in
figure 1
-
1
,
consistsof a mine detector, carrying case, carrying strap, one battery pack
for use inthe minedetector, and one spare battery pack. These components are
described inthe following paragraphs.
b. Mine Detector. The mine detector, shown infigure 1
-
2, isa portable
dynamic system capableof detecting buried nonmetallicand metallic objects,
specifically,buried antitank and antipersonnelmines. It is battery poweredand stored
in a carryingcase when not in use. The presenceof a mine is indicatedaudibly
through a headset. The minedetectorcomprises the subassemblies described in
paragraphs (1) through (4) below.
(1) Search HeadAssembly. The search head assembly consistsof
two
transmitting antennas, a receivingantenna and transmissionlines mounted on a
laminatedglass cloth plate. Inaddition, a transmitterand a receiver are mounted in a
housing on the search head.
A
rubberbumper
is
mountedaroundthe search head as a
protectivedevice. The search head assembly generatesand radiates multiplechopped
radiofrequency signals and receivesand detects these signals.
(2) HandleAssembly. The handleassembly consistsof a short handle,a
long handle, a transmitter
-
receiver housing, and attaching hardware. The short handle
is
attached to the search head by means of the transmitter
-
receiverhousingand can be
adjusted and held at the most convenientangle
for
use by means of a friction clutch
arrangement.The long handle,consistingof five nestingtubular aluminum sections,
fastens to the short handle by means of a bayonetcoupling. Itcan beextendedto any
intermediate length betweenapproximately 19inches (0.48m) and
57
inches (1.45m)
and isclamped at the adjusted position by means of the knurledcollets on each
section. This handleis ordinarily used in the normalwalking search operation, allowing
the operator to hold the search head about 4 feet
(
1.2m) away from his body.
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