BARTINGTON INSTRUMENTS
Page 11 of 61 OM1800/26
4. Battery Cassette and Charger
The gradiometer battery is a sealed Lithium Ion type and is housed in a sealed, separate cassette
(Figure 4a) which also contains the charging circuitry.
4.1. Charging the Battery
To charge the battery, connect the mains adapter supplied, or any isolated 9-18V DC supply (at
1.2A minimum), to the 2.1mm input socket (Figure 4b) for 6-8 hours. One charge will operate the
system for up to 27 hours with two gradient sensors or 36 hours with one gradient sensor.
Note:
The case may become warm during charging. This is perfectly normal.
The red LED on the side of the cassette will be illuminated while the battery is being charged
(Figure 4b). At the end of the charging period the charging current will be switched off
automatically and the red LED will be extinguished. The data logger may be switched ON when the
battery is being charged, but the red LED will then not indicate the end of the charging period. The
protective cover provided for the connector should always be used when not charging.
The battery voltage is shown on the data logger display at switch-on and at the end of each
survey Grid.
Note:
The battery should be recharged at the end of each surveying session.
Figure 4a: BC601 battery cassette. & charger
