Biogas Operating Manual
BMUK0001 / Issue 1
Geotechnical Instruments (UK) Ltd
Page 7
3.7 Battery/Charging
Warning
The battery charger is NOT covered by the Ex certification. The battery must be
charged only in a safe area.
The battery used in the Biogas
instrument is Nickel Metal Hydride and manufactured as an
encapsulated pack from six individual cells. This type of battery is not as susceptible to the top-up
charging ‘memory effects’ as Nickel Cadmium batteries, although it is not recommended that the unit
be given small top-up charges. The charger should only be disconnected when ‘charged’ is indicated.
The battery charger is intelligent and will indicate when the unit is charging, charged or if there is a
fault. A full charge should take approximately two hours.
3.8 Main Reading Screen
The main reading screen is also considered to be the normal operation screen and most operations
are carried out from this starting point. All of the instrument readings are displayed in this screen. Most
other operations can be selected via the main menu, key
in this screen. Whenever a key is pressed
the unit will emit a short ‘beep’ as an acknowledgement. This function cannot be turned off.
3.9 Memory
The analyser's memory is volatile, although it is retained by a battery back-up system.
The memory is not to be used as a permanent storage medium and any data should be transferred to
a more permanent storage medium as soon as possible. An analyser should never be stored for
prolonged periods with valuable data in its memory.
Although unlikely, sudden shocks, high levels of electromagnetic interference or static discharge may
cause memory corruption or loss. If this occurs the memory should be cleared and the calibration re-
set to factory settings before further use.
