Diagnostic Codes; Monitor Data Memory - Aspect BIS VIEW Service Information Manual

SECTION 3
_______________________________________________________________________
3.3.1.1 System Check
Software image checksums and trend data memory are tested and repaired if necessary:
These tests are performed when the system is powered up for the first time, after a new
battery or power supply are installed, or after the system has been reset.
3.3.1.2 Equipment and Connection Checks
The system checks continuously to be sure that the BISx, the PIC, and patient sensors are
operating properly and have not become disconnected.
3.3.1.3 DSC Self Test
The DSC Self Test tests the digital signal acquisition and conversion functions of the BISx.
It is a thorough test of the entire signal processing chain. The DSC Self Test may be initiated
from the Advanced Diagnostics menu (See Section 6.3.2., "The BISx Checkout
Procedure")
3.3.1.4 Sensor Integrity Check
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.
3.3.1.5 Impedance Check (Sensor Check)
Electrode impedance is tested when the BISx, PIC and sensor are connected and is
monitored continuously unless the user has turned impedance checking off in the menu
system.
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.

3.3.2 Diagnostic Codes

The BIS VIEW monitor provides diagnostic codes that may be helpful in tracing the source
of particular signal characteristics caused by artifact or by unusual hardware or software
conditions. Codes are displayed in the Message Region only if the user has requested them in
the Diagnostics Menu.

3.3.3 Monitor Data Memory

The monitor stores recorded trend data with time and date of acquisition. The duration of
trend data stored is approximately 72 hours.
When the memory is full, the oldest data are automatically erased as new data are stored.
Memory will be retained even if the battery has been discharged and remains when the
monitor is in the power off condition.
PRINCIPLES OF OPERATION
Caution:
3-8