Owner's manual

Currentramptolaser
SignalatDetector
ProcessedDetectorSignal

<2 INTRODUCTION AND GENERAL DESCRIPTION> 2-2
IM 11Y01B02-01E-A 4th Edition September 11, 2012-00
2.1.1 Measurement
     •Duringmeasurementthelaserisheldataxedtemperature.
This is the coarse wavelength adjustment.
     •Acurrentrampisfedtothelaser.Thisisthenewave 
length adjustment.
     •Thecurrentisrampedtoscanacrossthewavelength 
region desired.
     •Thecollimatedlightpassesthroughthegastobe
measured. The amount of light absorbed by the peak is pro
proportional to the target gas concentration.
     •Thelightisthenfocusedonadetector.
     •Thissignalisusedtoquantifythelightabsorbedbythetarget
gas.
Figure1-BasicLayout