Page 16 • Crystal Engineering Corporation
USB.power.indication.(. .).
The USB connected/powered icon will become active when connected. The mini USB B connec-
tion will power the nVision with and without the battery pack installed. Since the power module
consists of alkaline AA batteries, they will not be recharged by the USB device.
IP67 rating will be void if nVision is operated without 4AA power module in place. Therefore, if
you desire to power the nVision with USB it is recommended to install the 4AA power module
(with or without batteries) to protect the reference recorder from the elements.
nVision under USB power consumes less than 100mA.
WARNING:
The mini USB B connector shall not be used within the hazardous atmosphere.
It shall be used in the non-hazardous atmosphere with either “Safety Extra Low Voltage Cir-
cuits” (SELV) or “Protective Extra Low Voltage Circuits” (PELV). See the nVision Product Speci-
cations for a complete description of SELV and PELV. The USB connector has an Um of 6V.
Reset
If for some reason the nVision needs to be reset, remove the battery pack for at least one minute,
then reinstall. If the reset is successful, the nVision will start operating without pressing the
button when the power pack is reinstalled.
WARNING: Do not remove or change the batteries in a hazardous atmosphere.
Automatic.Shutoff
The nVision has an Automatic Shuto timer and will turn o automatically after 20 minutes of
non-operation (default value). Pressing any button or sending any command via the USB connec-
tion resets the shuto timer for another 20 minutes of operation.
The Automatic Shuto feature can be defeated (always on), if desired, or cus-
tomized to other values using CrystalControl. Battery life is enhanced by automatically shutting
o the device at shorter intervals.
Note that under USB power, the shuto feature is bypassed.
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