iScout® System User’s Manual
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© McQ Inc 2008
Switch Closure Control
The Switch Cable also allows the sensor to be connected to another device and provides both a
DC voltage and current to turn on or turn off the device. This active closure control must meet
the Closure Control Chip requirements for voltage and current. It is possible to damage this
Closure Control Chip in the iScout unit by reversing the voltage polarity shown in Figure 4-2.
CAUTION: Do not apply a reverse voltage polarity on the closure control wires.
4.3
Seismic Algorithms
The seismic portion of the unit is an internal geophone that detects energy levels in the
surrounding area and differentiates between vehicles and people. In order to get the most
accurate performance from the seismic transducer, the sensor should always be buried. If the
sensor is not buried, the noise from different sources including wind can cause frequent false
alarms. The operator has the ability to enable and disable seismic people as well as the seismic
vehicle using the HHPM. The operator can select one of four different sensitivity levels for the
seismic algorithm. Four bars is the most sensitive and one bar is the least sensitive.
NOTE: The sensor should be buried in order for the seismic algorithm to work properly.
4.4
Magnetic Algorithms
The magnetic portion of the unit is an internal magnetometer that detects magnetic levels in the
surrounding area and monitors for a change in the amplitude against a relatively stable
background level. These sudden changes caused by a target against the stable background
causes a detection to be reported. In order to get the most accurate performance from the
magnetic transducer, the sensor should be positioned upright and parallel to the line that targets
will be passing. The operator has the ability to enable and disable the magnetometer using the
HHPM.
4.5
Acoustic Blast Algorithms
The acoustic blast portion of the unit is an internal microphone that detects impulses in the
surrounding area and monitors for a change in the amplitude against a relatively stable
background level. These large impulses caused by a target against the established levels cause a
detection to be reported. In order to get the most accurate performance from the acoustic
transducer, the sensor should be positioned in the direction of the sound in an area being
monitored. The operator has the ability to enable and disable the acoustic blast using the HHPM.
The operator can select one of two sensitivity levels. In future releases, different types of
acoustic algorithms will be available for the operator to enable.
CAUTION: When the sensor is buried a plug is included for the microphone port to seal it
against water penetration. This plug must be used to prevent water damage when the
sensor is buried.
