Nellcor OxiMax N-550B Service Manual page 5

Repacking in a Different Carton .......................................................................... 77
Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 79
Performance ....................................................................................................... 79
Electrical ............................................................................................................. 82
Environmental Conditions ................................................................................... 83
Physical Characteristics ...................................................................................... 84
Compliance ......................................................................................................... 85
Manufacturer's Declaration ................................................................................. 86
Safety Tests ........................................................................................................ 92
Data Port Interface Protocol . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 95
Introduction ......................................................................................................... 95
Enabling The Data Port ...................................................................................... 95
Connecting To The Data Port ............................................................................. 97
Real-Time Printout ............................................................................................100
Technical Discussion . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 105
Oximetry Overview ...........................................................................................105
SatSeconds Alarm Management ......................................................................107
Reads Through Motion .....................................................................................107
OXIMAX Technology ........................................................................................108
MP-506 Interface ..............................................................................................108
Circuit Analysis .................................................................................................110
Block Diagram Theory ......................................................................................111
AC Input ............................................................................................................111
Power Supply PCB Theory Of Operation .........................................................112
Battery ..............................................................................................................112
Main PCB ..........................................................................................................112
N-550B
Ground Integrity ..................................................................................... 92
Earth Leakage Current .......................................................................... 92
Enclosure Leakage Current ................................................................... 92
Patient Risk Applied Current .................................................................. 93
Patient Isolation Risk Current ................................................................ 93
Protocol .................................................................................................. 95
Baud Rate ..............................................................................................96
Nurse Call Polarity Settings ................................................................... 99
Nurse Call Relay Pin States .................................................................. 99
Nurse Call Relay Rating ........................................................................ 99
Column Heading ..................................................................................100
Printout Source ....................................................................................101
Software Revision Level ......................................................................101
Alarm Limits .........................................................................................101
Column Headings ................................................................................101
Time Tag ..............................................................................................102
Patient Data .........................................................................................102
Operating Status ..................................................................................102
Automatic Calibration ...........................................................................106
Functional versus Fractional Saturation ..............................................106
Regulated DC Power Supply ...............................................................113
Controlling Hardware ...........................................................................113
CPU .....................................................................................................113
Charging Circuits .................................................................................114
Real-Time Clock (RTC) .......................................................................114
Contents
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