Environnement Envea MIR 9000, Technical Manual, Page: 81 / 212

Duplication prohibited
MIR 9000
Environnement
S.A
3–37
JULY 2009
Correction number: This enables accessing the different corrections for the selected parameter.
Seg. of Correction: This makes it possible to programme the number of segments required in the
linearization of the interference correction. Correction is limited to 2 segments.
NOTE : If the segment number is none, the correction is invalidated.
Correction Type: This makes it possible to define the correction type. There are 4 types of
corrections:
−
Cn/Cn: Correction of the concentration measured according to the concentration of the selected
channel (Interferant parameter),
−
Ab/Ab: Correction of the absorption measured according to the absorption of the selected channel
(Interferant parameter),
−
Cn/Ab: Correction of the absorption measured according to the concentration of the selected
channel (Interferant parameter),
−
An/Cn: Correction of the concentration measured according to the signal of the selected analog
input (Interferant parameter),
NOTE : The corrected measures can be visualized in the “ Tests / Optical Bench” and “Tests /
Absorption” menus.
Interferant: This makes it possible to select the interference gas or, in due course, the analog input
used for the interference correction.
The correction is entered in the form of a second-degree polynomial A x
2
+ B x + C where x presents
the measurement of the Interferant parameter.
Depending on the number of segments defined, the Ax2 , Bx , C and associated Inf. inflection points
are programmed.
NOTE : The interference correction is blocked at the last inflection point.