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Topcon GR-3 - Page 167

Topcon GR-3
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Receiver Specifications
P/N 7010-0736
A-3
Storage temperature -20 C° to +35 C° with batteries
-40 C° to +75 C° without batteries
Humidity 95%
Power
External batteries Li-ion, 3900 mAh, 7.2 V; 2 batteries; detachable
Battery size 132 x 52 x 25 (mm)
Battery weight 165 g (1 battery)
Operating time
Average with
Bluetooth “on” and
12 SVs tracked.
Using new batteries
and operating at
room temperature.
Modem = off – approx. 16 hours
915+ receive-only modem – approx. 13 hours
915+ modem transmitting at 250 mW – approx. 11
hours
915+ modem transmitting at 1 W – approx. 9 hours
UHF modem transmitting at 1 W – approx. 8 hours
AA-sized battery shells attached to both battery slots
and modem is off – approx. 2.5 hours
Urban areas with short distance to cell sites and GSM/
GPRS is on – approx. 12 hours continuous call
External power 1 port
Input voltage 9 to 21 V DC (for work)
10 to 21 V DC (for charge battery)
Maximum Charge Current <=2 Amp
Consumption
Average with
Bluetooth “on” and
12 SVs tracked.
Modem = off – approx. 3.5 W
915 receive-only modem – approx. 4.4 W
915 modem transmits at 250 mW – approx. 5.0 W
915 modem transmits at 1 W – approx. 6 W
UHF modem transmits at 1 W – approx. 7 W
Urban areas with short distance to cell sites and GSM/
GPRS is on – approx 4.2 W
Battery charge Connect the AC adaptor to charge the internal battery.
Available run charge when connected to external battery.
Charging time ~6 hours for full charge
Table A-1. Receiver General Specifications (Continued)

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