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SECTION 3 PRINCIPLES OF OPERATION

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3-8

3.3.4 BISx Data Memory

The BISx stores processed EEG parameters, including the BIS value, with time and date of

acquisition. History data stored in the BISx can be accessed by exporting it to a removable

drive using the “Export Data” function. The duration of BISx data stored is approximately

1200 hours.

To view BISx history for a specific case, the user must first identify which BISx was in use

during the case by looking up the BISx serial number in the Maintenance Menu’s “BISx

Connection History.” The appropriate serial number BISx can then be connected to any

monitor to export its History Data.

When the BISx memory is full, the oldest data are automatically erased as new data are

stored. Memory will be retained even if the monitor battery has been discharged and remains

when the monitor and BISx are powered off.

3.3.5 Saved Settings

Whenever the monitor is started up from Standby mode, it reverts to user settings that have

been set up and then saved using the [Save Settings] touch key. Settings are saved to the

current Monitor Mode (I, II, III, or IV).

The “Save Settings” option is disabled when in Battery Backup-Low Power condition. The

following settings are not saved by the Save Settings option: Impedance Checking (always

returns to ON), Filters (returns to ON), and Display Type (returns to BIS).

To restore factory settings to the current Monitor Mode, use the [View/Save Settings]

function. To restore the factory settings to all modes, press [Restore Default Settings for

All Modes] in the Maintenance Menu.

3.3.6 Battery Operation

In the event of a power failure or interruption of power during a procedure, the monitor

automatically switches to back-up battery operation. A fully charged battery will provide

approximately 45 minutes of operation. When the system is running on battery, a battery

icon displays next to the BIS number, indicating the battery status. When the battery reaches

a low power condition, the monitor beeps and the battery symbol displayed on the screen

changes color from green to orange. In addition, a “Battery Power Low” message blinks

continuously in the Message area of the screen.

The Save Settings feature is disabled when the battery power is low. Battery recharge time is

approximately 6 hours.

Caution:

To turn off all A/C power, disconnect power cord from A/C outlet.

Battery can be removed to shut down unit completely.

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Aspect BIS VISTA Spezifikationen Seite 30