OXITEST PLUS 7 OPERATING MANUAL
Figure 1 - Block Diagram
A photodiode in the
Oxitest Plus 7
probe intercepts the oximeter's red and infrared light signals,
and generates an electrical signal which is analysed by the
Oxitest Plus 7
microprocessor. The
microprocessor, in turn, produces control signals to drive an LED in the
Oxitest Plus 7
probe,
with the correct timing and amplitude appropriate to the oximeter under test. Light from the
Oxitest Plus 7
LED is detected by the photodiode in the oximeter sensor, causing the oximeter to
display simulated SpO
2
and heart rate indications.
Overview/Chapter 2
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