Yokogawa In-Situ Gas Analyzer TDLS200 - Manual (Page 106)

8-6
IM 11Y01B01-01E-A 6th Edition :Feb 13, 2013-00
<8. VALIDATION AND CALIBRATION>
15 After Zero calibration is completed, double check the absorption spectrum to ensure there is no ab-
sorption peak present or that there is no negative absorption peak (indicating that the zero gas had not
fully purged the optical path). Perform the zero calibration again in either case or check with your local
Yokogawa representative.
If there is reason to restore either zero calibration, then please follow the on-screen instructions:
When an acceptable zero has been established, arrange the purge tubes as shown below and then
follow the on-screen instructions for Span calibration.