Dnl910 And Dnl920 Data Loggers - Fourier DataNet User Manual

When connected to external power supply, the Repeater
battery will not be charged when the unit is turned off. This will
allow the system to protect the battery from overheating.
3.9.3. DNL910 and DNL920 Data
Loggers
The DNL910, DNL920 and PA data loggers run from an
internal NiMh rechargeable battery as well as from external
AC power supply.
Note: The PA (power amplifier) models must be connected to
AC power at all times due to the high power consumption of
these units.
Depending on the logger configuration, from a fully charged
battery, the non-PA data logger can run for up to several
months. Refer to section 3.9.6 for more details on battery life.
Note: Charge the data logger units for 16 hours before using
them for the first time.
When connected to external power supply, the data logger
battery will not be charged when the unit is turned off. This will
allow the system to protect the battery from overheating.
First Time Charging
From a fully drained battery, you must charge the battery for
16 hours to bring it to a full charge. Once the charge cycle is
complete, the logger will run from the external power supply,
without draining (or charging) the internal battery. In order to
maintain a fully charged battery and ensure the battery
doesn't self-discharge, the battery charger will daily charge
the unit for a minute to maintain the battery capacity.
Note: Before storing the DataNet units make sure you have
unplugged all the sensors and turned the units off via the
keypad.
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