15
Once plugged in, the AT550’s screen will illuminate and, after a few seconds, will look
similar to that shown below. You are now ready to start using the instrument.
If you have forgotten to disengage the travel lock, the screen will change to that shown
below (see Disengaging the Travel Lock, p. 9):
After a period of inactivity, the AT550 will go into a “sleep” mode to conserve energy,
causing the screen to go blank. To reactivate the AT550, push any gray button on the
control panel located below the screen.
Instructions for Use - Installation
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