User's Manual

DT398H
ENGLISH 4
OPERATION
Internal Battery
Warning!
The Internal battery pack should only be replaced by an authorized DT Research service representative. Please
contact your product and/or service provider for internal battery replacement service.
Powering ON and OFF
To activate the DT398H, push and quickly release the Power Button. The display will come on in a few seconds.
To put the DT398H in Standby mode, push and quickly release the Power Button. To turn the DT398H off for
extended storage, power off the device safely using any software function that “shuts down computer” provided
in the software operating system.
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NOTE:
The battery packs shipped with your device may be low in power—please use the AC-DC adapter
with the DT398H when setting up the device for the first time to fully charge the internal battery pack.
You may charge the external battery pack with it attached to the DT398H, or with the optional
external battery charger kit.
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NOTE:
When the battery pack(s) is (are) charging, the blue-colored Battery LED should blink slowly. If
plugging in the AC-DC adapter does not trigger this blinking activity and the LED stays dark, the
battery pack(s) may have been drained substantially. Try unplugging/ replugging the AC-DC adapter
to the DT398H a few times to activate the charging process.
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NOTE:
To conserve power, use (push and quick release) the Power Button to put the device in “Standby”
mode while not in use. Pushing briefly on the same button will wake up the system within seconds.
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NOTE:
Avoid using the Power Button (“hold 4+ seconds” feature) to turn off the device—this form of
hardware shutdown is intended to be a means of recovery from device lockups, and not as normal
operation.
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