Onset hobo u30, Руководство пользователя

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Onset Computer Corporation
User’s Guide - 52 - HOBO U30 Station/RC
M a i n t a i n i n g t h e B a t t e r y
The rechargeable battery requires an external power source to work properly. See Power on page 81 and
Maximizing Battery Life on page 56.
If you are using a solar panel for recharging the battery and there has been a steady decline in battery
voltage, you will need to make a change by either reducing power consumption or increasing recharging
current. Start by reducing the logging interval and/or excitation current (if you are using it). Try cleaning
the solar panel or repositioning it for maximum sunlight. You can also attempt to recharge the battery for
24 hours.
If the voltage is still low after attempting to recharge the battery with an AC adapter for 24 hours, then
you may need to charge it with a current limited variable power supply or replace it.
IMPORTANT : Due to the self-discharge characteristics of this type of battery, it is imperative that you
charge the battery for at least 12 hours every six months at minimum, even if you are not actively using
the HOBO U30 Station. Otherwise, permanent loss of battery capacity may occur.
Charging the Battery
In the event the battery is completely dead (less than 3.0 volts and the logger lights do not come on when
the battery is connected), you can charge the battery externally with a current limited variable power
supply (otherwise you must replace the battery). Hold the battery across a constant voltage source of 4.5
volts with a current limit of 2 Amps. When held at this voltage, the battery will seek its own current level
and maintain itself in a fully charged condition. It takes up to 24 hours to fully charge a dead battery.
IMPORTANT : Do not apply more than 4.6 volts absolute maximum to the battery. Do not exceed 2 Amps
of current when charging. If the battery gets hot, immediately stop charging the battery. If the battery
will not hold charge, it must be replaced. Dispose of the old battery per local regulations.