User's Manual

Introduction
GMS-2 Operator’s Manual
8
For more details on accessories and options available for the GMS-2,
contact your local Topcon dealer.
Rechargeable and Backup Batteries
The GMS-2 comes equipped with a rechargeable battery (GMS-2Pro
Battery) for powering the unit. The battery can be charged in the unit
or in an optional battery charger. A backup battery is also located in
the battery pocket and the unit’s serial number is located under the
battery.
The battery provides seven hours of operation, depending on the mode
of the receiver. Under normal conditions, the backup battery provides
eight to ten years of power backup for data and system integrity.
Backup
Battery
Battery
Serial
Number
Figure 1-2. GMS-2Pro Battery
GMS-2Pro Front
The front of the GMS-2Prois the primary interface with its
components and installed software.
• The internal GPS antenna detects signals from GPS+ satellites
and sends them to the GPS receiver board for processing.