Newton Security Inc | 443 SW 41st St. Renton, WA. 98057 USA | www.newtonsecurityinc.com
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3. TIPS FOR A SUCCESSFUL T-DAR INSTALLATION
To ensure the most accurate detection, it is crucial that the final internal dimensions of a T-DAR-
equipped mantrap adhere to the measurements that an end-user has provided to Newton
Security. The design, performance and price of this system are based upon those specific
characteristics.
Mantrap Construction
For optimum results the mantrap should be of opaque, solid wall construction.
If a glass wall is used for the installation, Newton Security recommends:
There should be no indirect sunlight in the mantrap. If the potential exists for sunlight in
the environment, do the following test on a bright day when there is full sunlight exposure:
oTurn off all lighting fixtures in the mantrap and in the surrounding area.
oIf you can read this manual or similar text in the resulting available light, there
may be too much sunlight for optimum performance.
oPoint a light meter at the source of the sunlight; it should be less than 10LUX.
Any direct sunlight in the mantrap will cause erratic performance and must be avoided.
For the most consistent performance, use the least amount of glass possible, for the
mantrap walls. Avoid using glass doors in the mantrap, as people standing outside the
door (waiting to use the mantrap) may be detected by the T-DAR cameras.
Avoid using fully glassed walls next to a high traffic area, as people may be detected
outside the mantrap wall.
oWe suggest installing two sections of glass in the wall, running the length of the
mantrap if necessary.
oOne section may be placed higher than five feet above the floor, with the other
section below three feet from the floor.
oThis results in an opaque section, between three and five feet above the floor,
and will prevent the cameras from detecting a person standing on the other side
of the glass.
Mantrap Height
The minimum camera height for proper tracking of the T-DAR cameras is 8 ft. (2.44m).
Persons taller than 6.3 ft. (1.9m) may receive higher false alarm rates in mantraps with
camera heights between 8 ft. (2.44m) and 8.5 ft, (2.60m).
A ceiling height above 9 ft. is recommended for low false alarm rates
For ceilings at 8.2 ft. (2.47m) or above, camera height extending kits are available.
Mantrap Size
The mantrap size is limited by the height and viewing angle of the camera heads. The limits
specified below are rigid and cannot be exceeded. Exceeding the two-head mantrap size
limitations will leave a significant gap in tracking, and security. When the mantrap is built
oversize, by any amount, a three or four head T-DAR system should be purchased.
The maximum length of a mantrap with cameras lower than 9 ft. (2.74m) is 9 ft. (2.74m).
The maximum mantrap width with cameras lower than 9 ft, (2.74m) is 4.75 ft. (1.45m).
The maximum length of a mantrap with cameras above 9 ft. (2.74m) is 10 ft. (3.00m)
The maximum width of a mantrap with cameras above 9 ft. (2.74m) is 5 ft. (1.50m).
