Vigilantplant TDLS8000, User Manual

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<6. Configuration>
6-15
IM 11Y01D01-01EN
Setup menu path:
[HART] “Detailed setup>>Analysis>>Averaging”
[YH8000] “Configuration>>Analysis>>Average”
6.9.7 Concentration Offset
It is possible to display the value resulting from adding a fixed offset value to the calculated
concentration value as the final reading. For the two-gas measurement specification, you can
set an offset for each of the first component gas concentration and second component gas
concentration.
Setup menu path:
[HART] “Detailed setup>>Analysis>>Zero offset”
[YH8000] “Configuration>>Analysis>>Zero Offset”
6.10 Non-process Parameter Settings
Non-process parameters are for correcting the influence on measurement values resulting from
the measurement target gas concentration contained in the purge gas when using gas containing
a component to be measured as the purge gas. Non-process parameters are used, for example,
with applications that use instrument air (approximately 20.9% oxygen) as the purge gas when
measuring the oxygen concentration of the process. This is because the measurement values
need to be corrected in consideration of the influence of laser absorption resulting from the
oxygen in the purge gas. The oxygen in the instrument air exists in various sections of the optical
path including the following.
• Laser module section in the laser unit (LU)
• Online validation cell in the sensor control unit (SCU)
• Alignment flanges (LU side and SCU side)
• Process insulation flanges (LU side and SCU side) (only when used)
• Insertion tubes (LU side and SCU side) (only when used)
• Valves (LU side and SCU side) (only when used)
• Process flanges (LU side and SCU side)
3rd Edition: Jun. 10, 2016-00