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Maintenance
• The performance of the battery decreases with the
temperature.
7.2.1.2 Optimal operation of the battery
The battery is charged automatically when the plug-in power supply
on the back of the instrument is connected and is plugged into a
mains socket (100–240 Volt/50–60 Hz).
CAUTION
Use only the manufacturer's specified external power supply
to operate the instrument and charge the internal lithium
battery pack. The specified power supply and it's plug shape,
it voltage rating (12V, 2A) and it's electromagnetic
characteristics are critical to assuring the DR 2800's
performance and the safety of the user.
Important Note: We advise charging the battery at an ambient
temperature between 10°C and 30°C, as this is the range in which it
can be most effectively charged to 100%.
7.2.1.3 Lifespan of the battery
The battery has a limited lifespan. The more it is used, the more its
capacity is reduced. If a fully charged battery only allows the
instrument to be used for a relatively short time, replace the battery
with a new one.
Note: You need not run down the battery completely before recharging it. If
you recharge the battery when it still has some residual charge, this does
not reduce its capacity!
7.2.1.4 Load the battery/Operating time
The time required to charge a newly installed battery is about
3.5 hours.
Operating time of a fully charged battery:
Charge: If a battery is charged to 100% capacity, and the user
carries out 10 measurements per day, and the instrument is left on
after each measurement for the full 15 minutes before it
automatically switches off, the battery can be used for 6 to 7 days
before it needs recharging.