Environnement MIR 9000 - LCD, Technical Manual

Page: 83 / 154

Duplication prohibited MIR 9000
3–45
February 2000
Information related to the display parameter ( Measure ):
MES ch : position on the correlation wheel of the measurement filter.
REF ch : position on the correlation wheel of the reference filter.
Gains : electronic gain applied to the measurement signal and to the reference signal,
TR : indicates the part, as a percentage, of the instantaneous measurement in the automatic
response time mode:
TR = 02: stable and low-noise measurement,
TR = 98: large variations on the measurement.
NOTE : This parameter makes it possible to determine the noise level on the measurement in Zero
mode.
S : amplitude of the signal in number of points on the measurement position,
SR : amplitude of the signal in number of points on the reference position,
SSR : ratio of the measurement signal on the reference signal (S / SR),
SSR0 : ratio of the measurement signal on the reference signal during the last zero
reference,
NOTE : The value SSR0 is used to manage the «Ratio Check Rx” fault by comparison with the
initial value programmed in the factory.
Abs.%: calculation of the absorption [ Abs = (1 – SSR / SSR0) * 100 ],
Abs-c % : absorption corrected of possible interference of the Ab/Ab and Cn/Ab type,
CONC : calculation of the concentration as from the linearization curve,
Conc-c % : calculation of the final concentration on which the following is applied
successively:
- Span coefficient,
- Correction of the interferences of the Cn/Cn and An/Cn type,
- General correction (H
2
O, O
2
, CO
2
or pressure),
- Coefficient of dilution,
- Conversion in mg/m
3
,
- Offset.
Also visualized are the data of the analyzer in general and of the gas measurement in particular:
Opt T° : Optical bench temperature
RPM : Motor speed
Wheel : number of positions on the correlative wheel (6, 10 or 16),
Flow : gas sample flow rate (unit: l/h),
Press .: gas sample pressure (unit: mbar).