Topcon GR-5, Operator'S Manual

Page: 53 / 202

Charging the Batteries
P/N 7010-1004
2-9
Charging Temperatures
Charge the batteries only in temperatures between
32
o
F (0
o
C) and 113
o
F (45
o
C).
An optimal charging temperature is between 50
o
F
(10
o
C) and 77
o
F (25
o
C). If possible, charge the
batteries within this temperature range.
Charging the Batteries before First
Use
The batteries are shipped from the factory without power. Fully
charge the batteries before surveying. See “Charging Procedure”
below for detailed instructions on how to charge the batteries.
Charging Procedure
There are two ways to charge the GR-5 detachable batteries:
• while they are attached to the GR-5
• while they are attached to the charging cradle
If the batteries are attached to the GR-5 or to the charging cradle, an
approximately 6-hour charge cycle will fully charge the batteries; the
batteries charge simultaneously.
The Li-Ion batteries used in the battery packs should run at no less
than 80% capacity after 500 charging cycles. These batteries do not
need to be drained before recharging.
To charge the batteries using the power supply unit:
1. Plug the receiver-to-SAE power cable into the receiver’s power
input port.
0
o
C
32
o
F
45
o
C
113
o
F
10
o
C
50
o
F
25
o
C
77
o
F