16
a different target if so desired. Each window has a center value, a window with value, and an
amplifier/attenuator value. When the object is passed to the center, the display will show side A,
side B. Smaller object may have to be passed closer to one side, therefore making the farthest side
reading somewhat unstable. This is normal and not to be concerned. Using the number of the
closest panel, this is the IDC center value. Make 5 or 6 passes with the object in different
orientations and record the values. Subtract the lower from the higher value and add 5 counts.
This should be close to the needed window value. If you want to alarm on this target the
AMPLITUDE value will be a positive number between 1 and 99. To attenuate the object the
number will be between -1 and -99. Be careful about killing targets entirely!!! If you desire you
can pick a program, which is close to the setting you need and view the settings, then change the
settings and save the program as one of the user programs.
HAGC settings – Horizontal Amplification Gain Control is for setting gain on each coil
independently. There are 12 coils, 6 per side locate in 6 zones. C1-C12 allows setting the
amplification/attenuation of each coil with the same 1 to 99, -1 to-99 values. This is to
compensate for nearby objects, which only affects some areas of the detector.
10.3.
O.T.P. Security Level
The Operation Test Piece (O.T.P.) simulates the detection response from a small revolver, and is
manufactured to the specifications of the U.S. Federal Aviation Administration. The O.T.P.
should be carried with its barrel down and butt to the right. The O.T.P. must be detected 100% of
the time as the person walks though the unit. This security level is average, and is considered
adequate by many security managers for general public weapon screening Suggested settings are
shown below.
10.4.
SUGGESTED PARAMETERS FOR O.T.P. SECURITY LEVEL
Program
(PROGRAM=)
1
Baseline Sensitivity
(SENS=)
20 to35%
A small adjustment to baseline sensitivity may be required because of location variables. If
support floor contains re-bar, Zone 6 sensitivity will have to be increased to a level where O.T.P.
is detected at ankle level. Refer to Section 14 to 16.
The FAA Operational Test Piece may be purchased from:
Larry Copello, Inc.
1239 Rollins Rd.
Burlingame, CA 94010
Tel (415)579-0256
Fax (415)579-0257
10.5.
F.A.A. THREE GUN TEST SECURITY LEVEL
The U.S. Federal Administration three gun test uses three different small handguns of varying
characteristics and the O.T.P. to set detection levels. Multiple passes are made through the
detector with the various weapons at ankle height, waist height, and at shoulder height (a total of
36 passes.) Information on the F.A.A. test procedure may be obtained from:
Federal Aviation Administration
800 Independence Ave. SW.
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