3000.doc Iss. 2/00
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MAINTENANCE
Normally no maintenance is required other than cleaning with a moist cloth. Avoid aggressive
detergents or solvents.
CAUTION: Before any maintenance, repair or exchange of parts or fuses, the instrument must be
disconnected from the mains supply and all other power sources. In the event of a fault occurring, the
instrument should be returned to our factory or Agent for rectification. A mains fuse is fitted to the
mains inlet socket on the rear panel, and should be replaced if necessary. The Instrument should only
be serviced/repaired by a competent engineer and only design approved replacement parts used.
CAUTION: Disconnect the mains lead and all connecting leads, before removing the fuse holder.
Replace only with the correct fuse type, i.e. according to the following chart.
LINE Range Fuse (250V)
VOLTAGE Vac IEC 127
Selection 47-63Hz 5 x 20 mm
100V 90-110V} 630mA (T)
120V 108-132V}
220V 198-244V} 315mA (T)
240V 216-264V}
Maximum Input Power: 25VA
BATTERIES
The thermometers may be used either directly connected to the mains supply or for portable
applications run from the internal batteries. Approximately 8 hours continuous operation from a full
charge is possible. The battery charger is built into the instrument and charging commences
immediately the mains supply is connected, Illuminating the LINE LED on the front panel. The
batteries used are of the sealed lead acid type; continuous trickle charging causes no harm to the
batteries and we always recommend running from the mains supply when possible, thus ensuring the
batteries are always fully charged and ready for portable applications. The charger will automatically
switch to trickle charge or fast charge mode depending upon the battery state.
LOW BATTERY indication is displayed when the batteries have approximately 10% charge left.
When this indication appears, the thermometers should be connected to a mains supply as soon as
convenient, as approximately 50 minutes operating time remains. To extend the battery life, the
backlight can be turned off via the OPT menu. Operating time without backlight is approximately 14
hours.
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