User`s guide

M3000A/M3046A/M3015A/M3016A Service Guide
Introduction to the Instrument 1-47
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The pressure sensor is used to measure the ambient pressure during the auto zero process and
to measure the pressure in the measurement cell during measurement mode.
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The analog section amplifies and digitizes the main, reference, pressure and temperature
signals.
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The controller reads the digitized values from the analog section and calculates the CO
2
wave
and numerics based on the measured main, reference, pressure and temperature signals. The
controller also controls the CO
2
frontend based on the control information received from the
Measurement Server, the Optical Code Recognition and the measured cell pressure.
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The gas inlet allows the connection of Microstream FilterLines. The Microstream FilteLines
are detected by the Optical Code Recognition.
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The Serial Interface and Frontend Link Protocol (FELP) provide the communication
interface between the CO
2
frontend and the CO
2
application software module running on the
main CPU of the Measurement Server.