User Manual

9
DRAFT COPY
DRAFT COPY
PRINCIPLES OF OPERATION
OF THE PAK-TRACKER LOCATOR SYSTEM
When a PAK-TRACKER Transmitter is activated, it sends out a radio signal
that is received by the PAK-TRACKER Hand Held Receiver. Understanding
how the radio signal from a Transmitter behaves and how the Hand Held
Receiver receives and displays the strength of that signal are critical to un-
derstanding the operation of the SCOTT PAK-TRACKER Locator System.
When the PAK-TRACKER Transmitter is activated, the radio signal will ema-
nate equally in all directions. The PAK-TRACKER Hand Held Receiver
indicates the relative strength of the radio signal on the display in numbers
from 10 to 99 where 10 is the weakest signal and 99 is the strongest signal.
The relative strength of the radio signal detected by the PAK-TRACKER Hand
Held Receiver will vary depending on:
1. The distance from the Transmitter to the Hand Held Receiver,
2. What path the radio signal has taken to get to the Hand Held Receiver.
The further the signal has traveled as well as how often it has been reflected will
determine the relative strength of the signal when it reaches the Hand Held
Receiver. The PAK-TRACKER Hand Held Receiver is a directional receiver in
that it will display a higher relative signal strength when it is pointed at the specific
area where the signal is coming from. Since the signal is coming to the PAK-
TRACKER Hand Held Receiver from all directions in varying strengths, the
receiver is very sensitive in responding to small differences between a stronger
signal that is coming most directly from the transmitter and a weaker signal that
has reflected several times before reaching the receiver. The user of the Hand
Held Receiver must interpret the readings on the Hand Held Receiver display
and follow the strongest signal to reach the activated Transmitter.
The radio signal from the Transmitter will always follow a path of least resis-
tance to the receiver in the Hand Held Receiver. The radio signal will pass
through some materials and surfaces, while it will tend to reflect off other
materials. In general, the radio signal will pass through glass, wood, or light
building materials. The signal will reflect off large metal objects, concrete
walls or floors, brick, or concrete block construction.
The reflected signal will continue to move following the path of least resis-
tance through openings, down halls, and through doors and windows, or
through holes or gaps in walls and floors. The signal will follow the open
cavities of a building such as halls, stairways, or elevator shafts.
The PAK-TRACKER Hand Held Receiver and PAK-TRACKER Transmitter
are used to monitor personnel location both indoors and outdoors. Outdoors,
the range is approximately 1000 feet / 300 meters line of sight (LOS). If the
PAK-TRACKER Transmitter is located inside a building and a PAK-TRACKER
Hand Held Receiver is located outside the building, range is approximately
400 feet / 125 meters. If both the PAK-TRACKER Transmitter and PAK-
TRACKER Hand Held Receiver are totally indoors, the system has a range
of up to 250 feet / 75 meters.
WARNING
DO NOT USE THE HAND HELD RECEIVER IN
ATMOSPHERES WHERE FLAMMABLES ARE
OPENLY HANDLED OR MAY BE PRESENT CON-
TINUOUSLY. THE HAND HELD RECEIVER MAY
BE USED IN ATMOSPHERES WHERE FLAM-
MABLES ARE NORMALLY CONTAINED OR ARE
IN THE FORM OF DEPOSITS OR DUST. SEE THE
SAFETY STATEMENT ON PAGE 4. FAILURE TO
VERIFY THAT THE ATMOSPHERE IS NOT FLAM-
MABLE OR EXPLOSIVE BEFORE USING THE
HAND HELD RECEIVER MAY RESULT IN A FIRE
OR AN EXPLOSION WHICH COULD RESULT IN
SERIOUS INJURY OR DEATH.
RESTRICTED USE IN SOME LOCATIONS
The Hand Held Receiver may not be suitable for use in certain atmospheres
which could contain flammable or explosive gases in unknown levels. If any
of the following conditions may be present, do not use the Hand Held Re-
ceiver:
Ignitable concentrations of flammable gases or vapors may be present
under normal conditions
Ignitable concentrations of such gases or vapors may exist because of
repair or leakage
Breakdown or faulty operation of equipment or processes might release
ignitable concentrations of flammable gases or vapors.
Always check for the presence of flammable or explosive gases before en-
tering an unknown atmosphere with the Hand Held Receiver.
WARNING
THE HAND HELD RECEIVER IS A BATTERY OP-
ERATED ELECTRICAL DEVICE THAT HAS NOT
BEEN EVALUATED FOR INTRINSIC SAFETY AS
AN IGNITION SOURCE. THIS DEVICE IS NOT TO
BE USED IN A POTENTIALLY EXPLOSIVE AT-
MOSPHERE. ALWAYS CHECK FOR THE
PRESENCE OF FLAMMABLE OR EXPLOSIVE
GASES BEFORE ENTERING AN UNKNOWN AT-
MOSPHERE WITH THE HAND HELD RECEIVER.
USE OF THE HAND HELD RECEIVER IN A FLAM-
MABLE OR EXPLOSIVE ATMOSPHERE MAY
RESULT IN IGNITION OF THE ATMOSPHERE
RESULTING IN SERIOUS INJURY OR DEATH.