User's Guide

GPT-A1 set to RECEIVER mode
GPT-T1 set to DISTRESS function
STEP 1
STEP 2
The GPT-T1 ID and coordinates
will be displayed on the GPT-
A1 screen (received distress
device)
The device ID is labeled
on PCB as 50000256
Method 1: Use GPT-A1 to
display the ID and
coordinates of GPT-T1
HOW TO GET THE DEVICE ID
Method 2: Read the
label on the PCB
inside
Method 3: Read from the
SELECT MEMBERS PAGE of GPT App
• Remove screws,
• Open the top cover, O-
ring
Apply silicone oil:
• concave surface of upper
housing
• convex surface of lower housing
• O-ring
• Put on O-ring
Replace
Battery
※ IMPORTANT:
Apply silicone oil on
the O-Ring when
replacing the battery
① ② ③
⑦
④
⑥
⑤
Put the battery
(+) Anode towards the
bottom
(-) Cathode towards the
middle
Use appropriate force and the
screw should be set ~ 0.5 mm
higher than the nut
Use the 4 screws to close the
housing
+
-
Check the battery
• Power on and the Red and
Gr
een LED should turn on for 1
sec.
• The red LED shouldn’t flash. (If
s
o please check and reinstall
the battery)