Aspect A-2000 BIS - System Self-Checks; Data Memory

SECTION 5 FEATURES AND CAPABILITIES
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5-5
5.2.20 System Self-Checks
The A-2000 monitor has several self-checking features to ensure that the system is
operating properly. These include:
System Check
Initiated when the unit is powered on, this test makes certain that system software and
hardware components are functioning properly.
Equipment and Connection Checks
The system checks continuously to be sure that the DSC, the PIC, and patient sensors
are operating properly and have not become disconnected.
DSC Self-Test
The Digital Signal Converter self-test is a thorough test of the entire signal processing
chain including the signal processing computers. The DSC self-test may be initiated in
the Diagnostic Menu (see Section 7).
Display Self-Test
This self-test, also found in the Diagnostic Menu (see Section 7), performs a thorough
test of the screen display functions. This test will not be performed while the monitor is
operating on battery backup.
Sensor Integrity Check (BIS XP Platform only)
This test begins each time that a sensor is connected to the PIC. It checks to make
certain that a valid, unexpired sensor is in use.
Impedance Check (Sensor Check)
Electrode impedance is tested when the DSC and PIC are connected and is monitored
continuously unless the user has turned impedance checking off in the Diagnostic Menu.
Caution:
Continuous impedance checking may need to be disabled if the 1
nanoampere 128 Hz impedance check signal interferes with other
equipment, e.g., evoked potential monitors.
Diagnostics
The A-2000 provides diagnostic codes to assist the user in tracing the source of any
problems that may occur. Codes are displayed in the right corner of the message region
only if the user has selected them in the Diagnostic Menu.
5.2.21 Data Memory
The monitor stores recorded trend data with time and date of acquisition. The duration of
trend data stored is approximately 24-25 hours. Trend memory can be viewed on the
screen in 1-hour segments using the Review arrow keys [←] [→] to scroll through
memory.
BIS Log information is stored for 400 hours of active monitoring.
Ten minutes of data leading up to the most recent marked event is saved and can be
printed by selecting “Print Event” from the Advanced Setup Menu.