Environnement AF22e, Technical Manual, Page: 69 / 118

Duplicationh prohibited
AF22e
Environnement
S.A
3–35
APRIL 2016
alarm icon or control icon will remain displayed and the maintenance icon will not be
displayed.
Under these conditions, to verify if the measurement or maintenance status is active, the user checks
the button is red-outlined or not in the advanced function page.
3.4.2.11. Advanced analyzer configuration
This screen is accessed by touching/clicking-on . This screen allows configuration of the
metrological parameters.
COMPOUND SO
2
section:
– « Unit » field: selects the compound measurement unit.
–
« Threshold 1 » and « Threshold 2 » fields: fix a limit value to the measurement. If measurement
value is out of this limit, an alarm triggers.
– « Conversion Coef. » field: displays the coefficient used for unit conversion (for ex. : ppb

µg/Nm
3
).
This function is only applied if unit is µg/m
3
, mg/m
3
, g/m
3
.
–
« Offset » and « Span Coef. » fields: these two values are used to calibrate the measurement with
the linearization curve Y = Ax + B. A is the span coefficient, B is the offset. The span coefficient can
be modified by the user or by a calibration cycle.
– « Zero adjust » field: allows setting manually the compound baseline (zero).
–
« Delta (%) » field: when the span coefficient is modified by a calibration cycle, this value indicates
the difference between the new coefficient and the previous coefficient. If this value is greater than
50%, a span alarm is triggered. It is necessary to re-validate manually the span coefficient to disable
this alarm. When the analyzer is in alarm, it does not take account the new calculated calibration
coefficient, but keeps the previous calibration coefficient.