Philips 862474 Manual Do Utilizador

Theory of Operation and System Architecture

Training  

This section contains a high level overview of the theory of operation of the major functional 
modules of the monitor. Philips service providers perform Bench Repair at the assembly level. 
For this purpose, they should review this high level information.

Please be aware that Philips only stocks assembly level parts.

The monitor is a full function monitor for use on adult and pediatric patients.

The functions performed by the system include monitoring patient ECG, heart rate, 
respiration rate, blood pressure, blood oxygen saturation, carbon dioxide

1

, and temperature.

In addition to monitoring and displaying the status of these physiological parameters, the 
instrument performs various microprocessor-programmed analytical functions, such as:

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Creating both visual and audible alarm signals when set limits are violated.

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Creating and displaying warning messages when conditions are detected that would 
degrade or prevent valid measurements.

•

Creating and displaying trend waveforms or tabular data.

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Providing a synchronizing pulse for defibrillator operation.

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Providing input to an optional recorder for printout of current or trend waveforms or 
tabular data.

The monitor is essentially a battery-powered instrument. An internal charging unit is designed 
to accept an external AC line voltage. The charger uses the external power source to maintain 
a "float" voltage source available from the batteries.

The functions are represented graphically in the following figure. Each section of the System 
Block Diagram is described briefly in the text that follows the illustration. This is followed by 
more detailed descriptions of the theory of operation of each block.

1. Carbon Dioxide (CO

2

) monitoring is available only with C3 Sedation models.