Installation Guide: 3M™ One-Piece GPS (TD4i) Offender Tracking System and Curfew Unit
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5
Status Alerts
The following sections provide a reference to the various status alerts and indications that can be
generated by the One-Piece unit.
5.1
Low Battery
A Low Battery alert shows that the One-Piece unit’s battery is running low and needs to be recharged.
This status is indicated by the following:
The device initially vibrates three times.
The PWR LED flashes red once every second until the device is connected to the charger.
The device vibrates once every ten minutes until the device is connected to the charger.
The One-Piece GPS unit must be charged for a minimum of two hours daily. The hours do not
have to be consecutive.
5.2
Motion No GPS
The Motion No GPS alert means that the One-Piece unit has detected 10 minutes of accumulated motion
by the offender within a 60-minute period without receiving a GPS signal.
This status is indicated by the following:
The device initially vibrates once.
The GPS LED flashes red once every second.
The device vibrates once every ten minutes until the violation has cleared by acquiring GPS.
5.3
Strap Tamper
A Strap Tamper alert occurs if the strap has been damaged or cut. By default, the One-Piece unit does
not indicate this condition. If vibration notification is enabled, the unit vibrates to indicate this status.
5.4
Case Tamper
A Case Tamper condition indicates that the unit has been damaged or opened. By default, the One-Piece
unit does not indicate this condition. If vibration notification is enabled, the unit vibrates to indicate this
status.
5.5
Geographic Zone Alerts
Geographic Zone alerts are triggered when the offender has violated one or more zone restrictions.
Inclusion Zone – Geographic areas like home or work in which the offender is required to be during
prescheduled intervals. If the offender is outside the Inclusion zone, a violation condition is
triggered.
Exclusion Zone – Geographic areas that the offender is forbidden to enter. These can be off-limits
at all times or during pre-scheduled intervals. When the offender enters an Exclusion zone, a
violation condition is triggered.
