Environnement AF22e, Technical Manual, Page: 79 / 118

Duplicationh prohibited
AF22e
Environnement
S.A
3–45
APRIL 2016
−
Dilution air (zero air):
Zero air generator or cylinder of reconstituted air.
Zero air should not contain more than 0.5 ppb of SO
2
and be free of contaminants that might be
measured by the analyzer.
−
Span gas (SO
2
):
Certified SO
2
cylinder, concentration 2% in air allowing six-range generation between 15 % and 90
% of the full scale of the measurement range used. Carrier gas may be nitrogen if the system allows
a higher dilution ratio than 600:1.
3.5.4.3. Procedure
−
Turn on the analyzer at least 6 hours before performing calibration.
−
Touch the key to display « Automatic cycle configuration» screen and program analyzer as
follows (advised configuration) :
−
Touch the key to display « Advanced analyzer configuration » screen:
Response time: set Auto
– Configure SO
2
offset to 10 ppb at least, or 5 % of the full scale of the measurement range used.