3M Littmann 3200 Manual page 8

7. Monitor Patient Heart Rate
The Model 3200 detects and displays an acoustic-based heart rate when presented with consistent heart sounds (heart rate
variation < 10%). It takes fi ve seconds to compute the initial heart rate and updates are provided every two seconds. The
heart rate will then be displayed for 10 seconds after removal of the chestpiece from the patient. Prior to the initial reading,
the display shows two dashes (--). For heart rates outside a range of 30-199 bpm, the display will also show two dashes (--).
The acoustic-based heart rate display functions best when the Model 3200 is placed near the apex of the patient's heart and
can be monitored while using any fi lter mode and/or volume level. If the heart rate changes from consistent to inconsistent or
if there is excessive ambient noise, patient movement or lung sounds during auscultation, the heart rate display number will
display two dashes (--).
8. Monitor Battery Life
Battery life is indicated by an icon in the LCD display.
The Model 3200 comes with a AA Alkaline battery. Battery will provide approximately 50-60 hours of continuous use,
depending on the frequency of Bluetooth data transfers. In a typical clinical setting, this represents about three months of
use.
As the battery life depletes, the icon will change as follows:
The battery icon begins to blink when only a few hours of battery capacity remains.
CAUTION: When the battery is completely depleted the scope becomes inoperable. No sound will be transmitted without
a functioning battery.
IMPORTANT! NiMH (rechargeable) and Lithium batteries may also be used in the Model 3200. However, battery type must be
specifi ed to ensure a reliable battery life indication (see Custom Confi guration section below).
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