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Block Diagram Of The Sidestream Co Measurement; Theory Of Operation For M3015a Sidestream Co 2 - Philips M3001A Service Manual

M3/m4 monitors,measurement server,measurement server extensions.
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Block Diagram of the Sidestream CO
to/from Server
Theory of Operation for M3015A Sidestream CO
Sidestream CO
samples. Signals progress through the circuit as follows:
Flow System
The flow system circulates the sidestream gas sample and pumps out waste gas.
Temperature Sensor
The temperature of the detector is measured and used to compensate temperature drift of the
CO
passed through an Analog-to-Digital converter.
Exciter and Infrared Source
The exciter generates a high frequency, high voltage signal to ignite the infra-red source and
to generate the infrared radiation needed to measure the CO
measurement cell.
Introduction to the Instrument
Serial
interface
with
Exciter
Exciter
IR
IR
Detectors
and
Source
Source
Temp Sensor
is measured based on non-dispersive infrared absorption of breathing gas
2
reading. Signals from the temperature sensor in the detector are amplified and then
2
measurement
2
Controller
and
Peripherals
Analog
Pressure
Section
Sensor
Flow System
Pump,
solenoid,
tubing
Sidestream CO
Measurement
2
Gas Outlet
Gas Inlet
with
Sample Line Inlet
Optical
Code
Recog-
nition
2
concentration in the
2
51

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M3000aM3046aM3015aM3016a

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