GS_GSR_GCR_UserManual_V21.doc / 18.09.2009
GeoSIG Ltd.
GSR / GCR / AS User Manual
Page 5
(Earthing Screw) (Optional)
This is a screw to be used for proper grounding of the Instrument. When used, it has to be securely
connected to a reliable Earthing.
3.5. Opening the Housing
To open the Instrument housing, loosen all 4 screws located at the corners (Please see Figure 1).
When all 4 screws are loosened enough, the housing can be opened from its backside. This provides
access to the inside of the Instrument, which is divided into two interconnected sections, Base and Lid,
holding the Instrument components under protective covers (Please see Figure 4).
The main ON / OFF switch is placed next to the flat interconnection cable between the Base and the
Lid.
To get access to the components, remove all screws of the relevant protective cover.
a
Under normal circumstances, there is no need to remove any of the printed circuit board
covers inside the Instrument, except for battery maintenance/replacement.
In any case, only trained personnel should remove these covers since power enters
directly into the Instrument and can be dangerous. Moreover untrained access may lead
to serious damage to the Instrument, as well as may void the warranty.
Especially the Lid cover should never be removed without first contacting to GeoSIG or
your local representative.
Before removing any of the covers, always:
1. Flip the main switch to "OFF"
2. Disconnect power supply from the POWER connector
3. Disconnect the main battery
4. Make sure that the green Active Charge “AC” LED indicator is off
3.6. Printed Circuit Boards
The Mainboard is mounted in the Lid under the protective cover and holds the anti-aliasing filter
circuitry, the A/D converter and the micro controller part with real time clock, memory etc. A second
circuit board may be mounted onto the main board. This option board holds the optional removable
memory card.
A separate circuit board is mounted to the front inside of the Base, which terminates the external
connectors, contains the connection for the internal sensor if available and the input protection circuits.
3.7. Internal Battery
The Instrument housing contains typically one 12 VDC, 7.2 Ah rechargeable sealed lead-acid battery.
The battery pack provides approximately 2 days of autonomy under normal operating conditions.
Additional battery capacity may be added externally (for further information, please contact GeoSIG or
your local representative).
3.8. Internal Battery Charger
a
AC powered Instrument only.
The built-in battery charger will keep the internal battery pack charged to an optimum level without the
risk of overcharging. The charger has sufficient capacity to recharge depleted batteries while the
Instrument is operating. The charger is powered by 230 VAC as standard and unless ordered different
by the customer. It can be powered by 115 VAC upon request (for further information, please contact
GeoSIG or your local representative).
