Sib Geofiz Pribor Ltd
operation from its battery. When the Tester is in the switched on state in the course of
charging, the top line of its display shows voltage (in volts) at the battery terminals and
the state of its charge in the form of AA battery symbolic representation. You can
monitor a status of the battery on the screen by entering the menu “Main menu” -> "5
Hardware diagnostics" -> "4 Power" (Fig. 3).
Nominal charging current is 380mA. When the battery voltage reaches 7.2...7.3V, the
charging current begins to decrease gradually. The charging current decreases up to
20% from nominal at achievement of capacity of the battery about 90%. From this point
the green LED lights on and off alternately. If necessary, at this point you can stop
charging. However, when possible, you should continue to charge. The battery is fully
charged when the charging current drops below 10% of nominal. Since then, the charge
is terminated, and the green LED is permanently lit.
It is recommended to charge the battery at a temperature from +10 to +40°С.
Charging time of a discharged battery at room temperature is approximately 10 hours.
Completion of charging is evidenced by steady green light of the LED indicator.
Charging at low temperatures does not enable the battery to reach full capacity. Monitor
the temperature inside the tester housing by readings of the built-in temperature sensor
shown on centre in the display top line. Readings of the remote temperature sensor are
indicated rightwards.
Figure 3
4. Working with the Tester
4.1. Design
The Tester front panel accommodates a graphic display with 240 х 128 point resolution,
a bi-colour LED indicator and a keyboard (Fig.
4). The ON/OFF button intended to
switch on and off the Tester is located in the lower left corner of the front panel.
Three connectors are provided on the housing frame:
“GEOPHONE/t°C” for connection of geophones and the remote temperature sensor;
“+12 V” for connection of the external power supply;
“USB” for PC connection.
The tester housing has a detachable rear cover. The cover is secured by four screws.
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