Aspect BIS VISTA Spécifications Page 29
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SECTION 3 PRINCIPLES OF OPERATION
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3-7
3.3.1.1 System Check
Software image checksums and trend data memory are tested and repaired if necessary
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 Diagnostics Menu (See Section 6.2.2., “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 and PIC are connected and is monitored
continuously unless the user has turned impedance checking off in the menu system.
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.
3.3.2 Diagnostic Codes
The BIS VISTA monitor provides diagnostic codes to assist the user in tracing the source of
any problems that may occur. 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. Trend memory can be viewed on the screen by
pressing the [Trend Review] key or, while a case is in progress, by using the Review arrow
key [◄] .
Information on the current sensor can be viewed in the “Configuration Information”
Screen.
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.
- BIS VISTA Monitoring 1
- TABLE OF CONTENTS 5
- TABLE OF FIGURES 7
- ABOUT THIS MANUAL 8
- 1 SAFETY PRECAUTIONS 9
- 1.2 Cautions 12
- 1.3 Key to Symbols 14
- OVERVIEW 17
- 2.2 Principal Components 18
- 3 PRINCIPLES OF OPERATION 23
- 3.2.1 The BISx 25
- 3.2.2 The BIS VISTA Monitor 27
- 3.3 System Features 28
- 3.3.2 Diagnostic Codes 29
- 3.3.3 Monitor Data Memory 29
- 3.3.4 BISx Data Memory 30
- 3.3.5 Saved Settings 30
- 3.3.6 Battery Operation 30
- 4 PREPARATION FOR USE AND 33
- INSTALLATION 33
- 4-2 34
- 4-3 35
- 4.2 Instrument Connections 36
- 4-5 37
- 4-6 38
- 5 CARE AND CLEANING 39
- 5-2 40
- 6 PREVENTIVE MAINTENANCE 41
- 6-2 42
- 6-3 43
- 6-4 44
- 6.3 Checking the Battery 45
- 6-6 46
- 6-7 47
- 6-8 48
- 7 DIAGNOSTICS AND 49
- TROUBLESHOOTING 49
- Troubleshooting Procedure 50
- 7-3 51
- Actions 52
- 7-5 53
- 7-6 54
- 7-7 55
- 7-8 56
- 7-9 57
- 7-10 58
- 8.1 Replacing the PIC 59
- 8.2 Replacing the BISx 59
- 8.3 Replacing the Monitor 60
- 8.4 Replacing the Battery 61
- 8-4 62
- 8-5 63
- 8.7.2 Procedure: 64
- 8-7 65
- 8-8 66
- 8-9 67
- 8.8.2 Procedure: 68
- 8-11 69
- 8-12 70
- 8.10 Using the Reset Button 71
- Service 72
- 9.1 General Specifications 73
- EEG Specifications: 74
- BISx Specifications: 75
- 9-4 76
- 9.2.1 Accessories 77
- Guidance 78
- 9-7 79
- 9-8 80
- 9-9 81
- 9-10 82
- 9.3 Warranty 83
- 9-12 84
- 10 APPENDIX I 85
- Description of device: 86
- Test types allowed: 86
- 10.3 Test Sensor 87
- Test Sensor Values 88
- Electrode # Typical Range 88
- 11 APPENDIX II 91
- 11.2 Block Diagram 92
- Contact Information for: 94
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