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Section 5
5.1 Cleaning the Instrument
Clean the case, screen, and other components (except connectors and plugs) with a slightly wet
cloth or cotton swab. Use soap to remove grease spots.
5.2 Recharging the Internal Battery
DANGER
Never connect the Surveyor 4a to a power source which exceeds 15 volts or fatal electrical
shock may occur. To avoid shock hazards, do not use AC (110 and 220 VAC 12VDC power
adapters) to power the Sonde. Use battery power when deploying a Sonde outdoors. If an
AC power is used, a Ground Fault Interrupt (GFI) device must be used. GLI installation must
be done by a licensed electrician.
The Surveyor 4a must be powered on (with charger cable and a power adapter properly
connected) and left on in order to charge.
We recommend charging the Surveyor 4a when the instrument internal battery voltage (IBV)
reaches 6.5 volts.
The recharge time depends on the percent left (IB%) in the battery. Charging is complete in three
and a half hours.
When the Surveyor 4a is first received, we recommend that a complete discharge cycle is
performed and then recharge the Surveyor 4a.
1. Connect the Surveyor 4a charger cable to the Surveyor 4a. Attach the 110 or 220 power
2. Turn the Surveyor 4a on.
3. A low external power supply screen will be displayed if the Surveyor 4a is connected to an
4. After the welcome screen, the following screen will be displayed. The Estimated Time to
Note: IB% is an estimate. Do not disconnect the Surveyor 4a from charging until prompted. Early disconnect
can severely reduce the operating time.
5. The battery will automatically start to recharge. Press the Suspend key to pause the recharge
Note: When the All Stats key is selected, it will be replaced with the Est Only key, which brings back the first
charge mode menu.
Maintenance & Calibration
adapter to the other end of the charger cable. For the 220 power adapter, connect the
country's corresponding power cord to the IEC 320 connector.
external power source that is providing insufficient voltage or poor connections where made.
Recheck all connections and try again. Insert the loose end of the power adapter to the
country's corresponding power cord into the wall outlet. Press any key on the Surveyor 4a to
continue.
Charge (ETTC) and estimated current charge level of the internal battery back in percent will
be displayed (IB%). The ETTC value will decrease as the full charge approaches. The IB%
value will change until it reaches fill recharge capacity.
process. Press Resume to restart the recharge process. During the recharge process, some
of the original data will reset. Press the All Stats key to provide more detailed information on
the recharge process.
Maintenance & Calibration
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