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GeoScope
TM
User’s Manual
© 2013 3d-Radar AS
Page 11
Revision 2.0
Date: 02/07/2013
2.5
Power Supply
The GeoScope runs off 12/24V DC (10.5 – 36V). At maximum load, the
GeoScope power consumption is about 80W (7A @ 12V DC). During startup
the inrush current might be as high as 10A.
Never unplug the power cable from the GeoScope when the
system is running. This may cause loss of data and insufficient
system shutdown.
The Power connector (Lemo EGJ.3B.303.CLA) has the following pin
configuration:
The GeoScope may be connected to the 12V DC system of a car, but special
care should be noted to voltage stability. Always use a separate 12V
accumulator or a DC/DC converter with galvanic isolation between the
GeoScope and the car 12V outlet to stabilize the voltage. Avoid starting the
car engine when the GeoScope is connected since the starter motor might
cause severe voltage surge.
When running the GeoScope on battery power, it is very important to use a
high quality battery. Old batteries may often appear to be fully charged when
measured without load, but when connected to load, like the GeoScope,
voltage can drop quickly.
Under normal operation, a fully charged 50Ah lead-acid accumulator with
good health, will last for approximately 5 hours. A gel-type deep-cycle
accumulator is recommended both for safety, i.e. reduced risk for acid
leakage, and for endurance. Gel accumulators are designed for supplying
power over a long period of time with repeated deep discharging. Ordinary
car accumulators on the other hand, are constructed for supplying high
currents over a short period of time during starting. They are not constructed
for being completely discharged repeatedly.
2.6
Control Computer
The control computer is usually a laptop with the GeoScope user software
installed. The control computer is used to configure the radar waveform,
calibrate the DMI, control data acquisition and manage the collected data
stored on the GeoScope. The system performance will be affected by the
speed of the client laptop. A workstation grade CPU, gigabit Ethernet and a
fast SSD is recommended.
As of 2013-05-04, the client software runs on Java 1.6 while 3drExaminer
requires Windows 7.
Pin
Signal
1
Pos
2
Neg
3
Chassis GND