Aspect Medical Systems BISPECTRAL INDEX A-2000, Руководство по обслуживанию

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SECTION IX APPENDICES
9.2
APPENDIX II - SENSOR SIMULATOR - INSTRUCTIONS FOR USE
Description of device : The sensor simulator is a service tool that allows for the
verification of proper impedance values being detected by the BIS monitors during the
“Check electrodes”. This test is part of the initial test that each monitor performs. The
simulator also allows for safety testing of BIS monitors in the field by allowing connection
of the test equipment to the monitor via the patient interface cable.
NOTE: The life expectancy of the sensor simulator is 25 connect / disconnect cycles.
Figure 1: Schematic of Sensor simulator circuit. S1 – S4 connect to 4 input signal pins
on the patient interface cable. The Inputs (+ and -) are where one connects the test
signals to test the BIS Monitor. .
Test types allowed :
Sensor check :
This checks and verifies that the monitor is reporting the proper impedances that it sees
from the sensor simulator. This procedure verifies the proper functionality of the BIS
monitoring system.
Connect the sensor simulator to the BIS Monitor at the patient interface cable.
The monitor should proceed to recognize that a sensor was connected and report the
proper impedance values:
A-2000
:
Electrode # Typical Value in K
Ohms
Resolution Range in K
Ohms
1: 5 4 - 6
2: 10 8 - 12
3: 2 1 - 3
A-1050

 

:
Note that values are now displayed in Ohms and not Kilo Ohms.
Electrode # Typical Value in Ohms
Resolution Range in Ohms
CTR 5400 4400 – 6400
GND 10000 8000 – 121000
L/R 2200 1200 - 3200
The monitor then proceeds to display the BIS screen. After a few seconds the BIS
displayed will be 0.