3M Littmann 3100 Manual page 6

To specify the battery type: Select the "BATTERY" option in the Setup menu. Use the (-) and (+) buttons to scroll through
the list of battery types. The LITHIUM battery is a non-rechargeable cell especially recommended for low-temperature
operation of the stethoscope. The NIMH battery is rechargeable (external charger required). Press and release the (M) button
to select a setting. The factory default is the ALKALINE battery.
To specify the preset (default) volume level: Select the "SET VOL" option in the Setup menu. Press and release the (M)
button to select the current level as default. The factory default is level 3.
To specify the preset (default) filter setting: Select the "SET FLTR" option in the Setup menu. Press and release the (M)
button to select the current filter as default. The factory default is the diaphragm filter.
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To specify Backlighting duration: Select the "BACKLITE" option in the Setup menu. Use the (-) and (+) buttons to scroll
through the list of options. Press and release the (M) button to select. The factory default is "ON DMND" (Backlight will
illuminate for three seconds by depressing and releasing the power button). The "DISABLE" option disables the backlight
at all times, conserving power. The "ALWAYS" option will illuminate the backlight at all times at a reduced level while the
stethoscope is powered on and not in standby mode.
To select Auto Off power management: Select the "AUTO OFF" option in the Setup menu. Use the (-) and (+) buttons to
scroll through the list of options. Press and release the (M) button to select. The factory default is "ENABLE."
The Auto On feature powers on the stethoscope from its standby mode when contact is detected with the diaphragm. With
the Auto Off feature, power will be turned off when user activity is no longer detected (the stethoscope returns to its standby
mode after a delay equal to the Power On time.)
To obtain model and software version information: Select the "ID" option in the Setup menu. Use the (-) and (+) buttons
to scroll through the list of reference numbers. Press "M" to return to the operating mode of the stethoscope.
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