Vernier LabQuest 2 - Manual (Page 8)

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II. LABQUEST 2 HARDWARE
Once LabQuest is connected to AC power or the battery has been charged, press the power
button located on the top of the unit, near the left edge. LabQuest will complete its booting
procedure and automatically launch the LabQuest App by default, as shown above. If the screen
does not light after a moment when used on battery power, connect the power adapter to
LabQuest and to an AC power source, then try the power button again.
Power Button
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Power on – If the screen is off for any reason (LabQuest is off, asleep, or the screen has
turned off to conserve battery power), press and release the power button to turn
LabQuest back on. If LabQuest was off, LabQuest will also complete its booting
procedure that takes about a minute and then display LabQuest App.
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Sleep/wake – When LabQuest is on, press and release the power button once to put
LabQuest into a sleep mode. Note that the sleep mode does not start until you release the
power button. In this mode, LabQuest uses less power but the battery can still drain. This
mode is useful if you are going to return to data collection again soon, in which case
waking LabQuest from sleep is quicker than restarting after shutdown. To wake
LabQuest from sleep, press and release the power button.
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Shut down – To shut down LabQuest, hold the power button down for about five
seconds. LabQuest displays a message indicating it is shutting down. Release the power
button, and allow LabQuest to shut down. To cancel the shutdown procedure at this
point, tap Cancel. You can also shut down LabQuest from the Home screen . To do
this, tap System and then tap Shut Down .
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Emergency shutdown – If you hold the power button down for about eight seconds,
LabQuest powers off uncleanly. This is the same as pulling the battery out of the unit
while it is running. This is not recommended unless LabQuest is frozen, as you may lose
your data and potentially cause file system corruption.