Emerson Process Management GmbH & Co. OHG 7-39
X-STREAM XE
Instruction Manual
HASXEE-IM-HS
10/2012
7
Maintenance & Procedures
Before selecting any further line
make sure the required calibra-
tion gases are applied, and val-
ves are assigned properly!
Supply all calibration gases
with the same ow as the samp-
le gas (recommended approx.
1 l/min), pressureless and utili-
zing the correct gas ttings (
sect. 3.4).
Make sure the calibration purge
time is set to a value ensuring
the measuring cell is lled pro-
perly with the related calibration
gas after the valve has opened!
Ensure the warm-up time after
switching on has elapsed!
Warm-up time is 15 to 50 minutes
depending on installed measu-
ring system and conguration!
7.4.5 Unattended Automatic Calibration
7.4.5 Unattended Automatic Calibration
The unattended automatic calibration feature
allows to program the analyzer to automa-
tically perform valve supported calibration
procedures without the need of digital inputs
or Modbus interface connections.
Compared to the procedures described in the
section before (advanced calibration), there
are only very limited options, comparable to
the manual calibration procedures: The ope-
rator has the simple choice of programming
zero, or zero and span calibration intervals.
The main features compared to advanced
calibrations as described from 7-18 are:
1) an interval time species the time bet-
ween two calibrations
2) starting and processing calibrations does
not need operator interaction
3) for span calibrations the analyzer consi-
ders the requirement, that always a zero
calibration has to be carried out rst,
4) (multi channel instruments only): Every
time an unattended calibration is started,
it is carried out for all channels!
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