Section 3: Functional Block And Circuit Analysis - Nellcor N-180 Manual

SECTION 3: FUNCTIONAL BLOCK AND CIRCUIT ANALYSIS

INTRODUCTION
FUNCTIONAL BLOCK ANALYSIS
Oximetry Module
Introduction
Functional Block Analysis
Circuit Analysis
This section explains how monitor circuits operate and contains two parts.
• Functional block diagram analysis
• Circuit analysis
Monitor functional elements (figure FOG-1) include:
• Standard original equipment manufacturer (OEM) oximetry module
(SOOM), model MP-203 oximetry module. For ease of reference this
module is hereafter referred to as the oximetry module. In actual fact,
the oximetry module is a printed circuit board (PCB).
• CPU PCB
• LED Drive PCB
• LED PCB
• Front panel controls
• power inlet
AC
• Battery
The oximetry module (figure 3-1) drives the oxygen transducer and conditions
the signal derived from the patient (via the sensor connector).
3-1