Select Filter - 3M Littmann 3100 Instructions For Use Manual

• Auto Off with Standby Feature: After manual turn-on, stethoscope will stay on during use, but switch to a power-
saving "standby" mode after 20 seconds of inactivity. LCD display will display the Littmann® logo during standby
mode. When stethoscope diaphragm or any button is pressed, LCD display settings will reappear and stethoscope
will be ready to use. After two hours of non-use, the stethoscope will leave standby mode and fully power off. You
may customize on-time and off-time to meet your own personal needs. See Custom Confi guration section below.
• LCD Display Backlight: Backlight options are available for use at low ambient light conditions. By default,
depressing and releasing the power button at any time will illuminate the LCD display for fi ve seconds.

5. Select Filter

This stethoscope comes equipped with both bell (low frequency) and diaphragm (high frequency) fi lters. The default setting is
the diaphragm fi lter. Instructions for changing the default fi lter setting are given in the Custom Confi guration section below.
To select fi lter: Depress and release fi lter button (as shown in diagram) until desired fi lter mode appears on LCD display.
6. Adjust Sound Amplifi cation Level
The Model 3100 sound level can be amplifi ed in 8 increments up to 24X amplifi cation of a non-electronic (cardiology-level)
stethoscope. Level 1 is equal to a non-electronic stethoscope. Level 9 is equal to 24X amplifi cation of a non-electronic
stethoscope. The greater the amplifi cation, the more bars you will see.
A default start-up amplifi cation level can be set using the instructions provided in the Custom Confi guration section below.
The default setting is marked by the box on the vertical bar shown in the volume icon in the LCD display. The illustration
shows a default amplifi cation setting at Level 3.
• Increase Amplifi cation: Press ( + ) button until desired amplifi cation level is achieved
• Decrease Amplifi cation: Press ( - ) button until desired amplifi cation level is achieved
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