PASCO Xplorer GLX, Руководство пользователя

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94 B a t t e r y a n d P o w e r
While charging, the GLX monitors its own temperature to prevent overheating.
The maximum recommended ambient temperature for charging is 32 °C (90 °F)
without sensors, or 28 °C (82 °F) with four maximum-load sensors
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connected. If
the GLX becomes too hot, it will temporarily stop charging to allow itself to cool,
resulting in a longer charge time.
Battery Power and Data File Storage
The GLX’s RAM (random-access memory) requires a small amount of power. In
order to preserve stored data, the GLX automatically shuts down when its battery
begins to run low. At that point, AC power must be connected within three days
to preserve data files stored in the RAM folder.
When powered off, disconnected from AC power, and starting with a fully
charged battery, the GLX will store RAM data for two weeks.
Flash memory does not require power. Data files stored in the Flash folder will
be preserved indefinitely even if the battery runs down or is removed.
For permanent storage, save files in the GLX’s Flash folder or transfer files to a
USB Flash drive or a computer
.
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GLX Storage
To maximize the long-term performance of the battery, keep it charged as much
as possible. Note that the battery will drain slowly even when the GLX is pow-
ered off and disconnected from AC power. When you are not using the GLX, fol-
low these storage guidelines:
• Whenever possible: Keep the GLX connected to AC power.
• Unplugged for more than a few days: Backup your data and allow the bat-
tery to fully charge before disconnecting the AC power.
• Unplugged for more than a month: Backup your data, allow the battery to
fully charge, then follow the instructions under “Manual Internal Disconnec-
tion” below. A disconnected battery or a GLX in “deep sleep” mode can be
stored for up to a year before you should recharge it.
Battery Disconnection
Automatic Internal Disconnection
When it is unplugged and turned off, the GLX uses a small amount of battery
power to preserve data saved in RAM. In order to avoid fully discharging the bat-
tery (which is not good for it), the GLX will go into “deep sleep” mode when
either of these conditions is met:
• The GLX has been unused and unplugged for two weeks.
• The battery has drained to a critical level.
When the GLX enters deep sleep mode, it disconnects its battery by opening a
switch on its circuit board. At this point, data saved in RAM is lost, but data
saved in Flash is preserved. Connect the GLX to AC power or press the reset but-
ton (on the back of the GLX) to turn it back on.
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A maximum-load sensor is one that
draws 100 mA of current from the GLX,
such as the PASPORT CO
2
sensor. Most
PASPORT sensors draw much less cur-
rent.
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See “Data Files Screen” on page 78 for
more information.