Globalsat TR-151 - Understanding TR-151 LED Indicators

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3. Introduction and Features (Continued)
3.2 LED Indicators
GSM LED
LED
Blink Quickly (Once
per second)
Blink Slowly (Once
every 3 seconds)
Off
State
No SIM card inserted
TR-151 is searching
GSM network
SIM card is registered
to GSM network.
TR-151 is sending data
to GSM network
TR-151 is in standby
mode
GPS LED
LED
Keeps On
Blink Slowly (Once
every 3 seconds)
Off
State
TR-151 has not received
a GPS fix
TR-151 is attempting to
attain a GPS fix
TR-151 has attained a
GPS fix
TR-151 is in standby
mode
Status LED
LED
Keeps
On
Off
Blink
1 time
2 times
3 times
5 times
State
Battery
Low
TR-151
is in
standby
mode
TR-151 is
being
turned
“ON”.
TR-151 is
being turned
“OFF”.
SOS button
is pressed
Error occurs
Power LED
LED
Orange
Off
State
TR-151 connected to charger or
USB to Mini-USB cable.
LED shuts down after battery charge
completion.