User's Manual

ADM Technical Description RFID-LSCAN
File: ADM UserMan.doc Page 11 of 12
Status: Rev1 Last Update: 9/21/2010 3:49:00 PM
3.6.1 Power
When activated, the power LED is solid white if the power system is OK. If an uncharged battery
pack is inserted, the power LED flashes 3 times/second (provided that the internal battery is not
discharged as well).
3.6.2 Busy
When activated, the busy LED (blue) is on while the unit is busy (e.g. booting, reading tags,
sending and receiving SMS).
3.6.3 GSM
When activated, the GSM LED indicates the quality of the GSM signal:
If the GSM signal is strong enough, the LED is green
If the GSM signal is unavailable or marginal, the LED is red
The GSM signal quality information is only collected during SMS operation and therefore the
indication accuracy depends on how long the unit has been in operation.
3.7 Power Supply System
The ADM is powered by Li-Polymer rechargeable cells. The main power source is the external
battery pack. The secondary source is a backup battery, built inside the main unit. The battery
pack powers the ADM circuitry and at the same time charges the backup cell. The ADM works
properly even if the backup battery is fully discharged, as long as the battery pack is connected
and not depleted. The user only needs to charge the battery pack.
3.7.1 Battery pack
The battery pack has two ports: a charging port (micro-B USB receptacle) and a load port (battery
contacts). The battery pack can be recharged from a dedicated charger or a PC USB port.
The battery pack has an LED to indicate the charging status:
LED is red while charging
LED turns green when the pack is fully charged
LED goes off when the charger is disconnected
Table 3 – Battery Pack Characteristics
Value
Parameter Conditions
Min Typ. Max
Power saving mode, excitation every
5min, one SMS/day, max. LF field
28 days
Battery Life
Continuous mode, one SMS/day, min.
field strength
7 days
Charge Time
1A charging current 4 hours
Recharge Cycles 500
Charge
Temperature
0
o
C +45
o
C
Storage 1 year -20
o
C +45
o
C