System Planning Corporation GTLITEV3 Manuale Utente
GlobalTrak ™
GT Lite Operation and Maintenance Manual
External Power Sensor
GT Lite has an internal sensor to detect when external power is present. When the device
wakes for report (alarm or timed), it checks to see if external power is connected. If the
power state has changed, an alarm is generated. As noted above, the presence of external
power state has changed, an alarm is generated. As noted above, the presence of external
power can trigger a different reporting interval.
GT Lite GPS
The GT Lite uses a high sensitivity Assisted GPS system to give the highest GPS performance.
Once the device knows its initial location, it can be placed in very harsh GPS environments
Once the device knows its initial location, it can be placed in very harsh GPS environments
with no direct view to the sky. These environments include inside of cargo in trailers or
containers. Some care should still be taken to ensure proper GPS function. The device
should be placed as high as possible in the cargo and it should be placed as close to the door
containers. Some care should still be taken to ensure proper GPS function. The device
should be placed as high as possible in the cargo and it should be placed as close to the door
as possible.
Reports from the GT Lite all have a GPS mode that qualifies the type fix received. This is
called the GPS mode. It allows the user to quickly determine whether or not the GPS location
can be trusted. There are three modes reported:
can be trusted. There are three modes reported:
3D: Accurate fix. Can be completely trusted.
2D: Normally accurate fix, but can be very far off.
Previous Valid Fix: No fix received. In this case, GT Lite reports the last valid fix.
GT Lite Wireless Sensors
GT Lite has the ability to wirelessly connect to additional sensors using built in ZigBee
wireless. Wireless sensors include the Remote Sensor Node (RSN) for sensing cargo condition
(temperature, shock, humidity, custom sensors) and wireless seals. Both a barrier bolt seal
(temperature, shock, humidity, custom sensors) and wireless seals. Both a barrier bolt seal
and a cinch type seal are available. Before using these devices, the user must notify the GT
Lite of the device address so they can pair together. This can be done remotely or locally.
Lite of the device address so they can pair together. This can be done remotely or locally.
Once the devices are paired the remote sensors act just like onboard sensors. For more
information about using wireless sensors, consult section XXXXXXXXX.
information about using wireless sensors, consult section XXXXXXXXX.
Prepared: R. Straz
Date: July 25, 2007
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