ABB EL3000 Series - Caldos27: Preparation for Installation

32 EL3000 CONTINUOUS GAS ANALYZERS | CI/EL3000-EN REV. B
Caldos27: Preparation for installation
Sample gas
Sample gas inlet conditions
The analyzer must not be used for measurement of ignitable gas/air or
gas/oxygen mixtures.
Temperature The dew point of the sample gas must be at least 5 °C
lower than the lowest ambient temperature in the overall
sample gas path. Otherwise, a sample gas cooler or con-
densate trap is required. Fluctuations in water vapor con-
tent cause volume errors.
Pressure The analyzer module is operated under atmospheric pres-
sure; the sample gas outlet is open to atmosphere. Inter-
nal pressure drop < 5 hPa with standard flow rate 60 l/h.
Permissible absolute pressure range: 800 to 1250 hPa.
Operation under lower absolute pressure (e.g. at altitudes
above 2000 m) on request. Overpressure in the sample cell
max. 100 hPa.
Flow 10 to 90 l/h, min. 1 l/h
Corrosive gases
If the sample gas contains Cl
2
, HCl, HF, SO
2
, NH
3
, H
2
S or other corrosive
components, the analyzer may be used only if the sample gas composition
has been considered during analyzer configuration in the factory.
Flammable gases
The analyzer is suitable for measuring flammable gases in general purpose
environment. The special requirements for the measurement of flammable
gases (see page 43) must be observed.
Test gases
Analyzer Test gas for zero-point and sin-
gle-point calibration
Test gas for end-point calibration
Caldos27 Sample component-free test gas or
process gas
Test gas or process gas with a known
sample gas concentration
Caldos27 with a suppressed
measuring range
Test gas with a sample component
concentration near the starting point
of the measuring range
Test gas with a sample component
concentration near the end point of
the measuring range
Caldos27 with single-point
calibration
Test gas with a known and constant
rTC value (standard gas; possibly also
dried room air)
–
Dew point
The dew point of the test gases must be approximately the same as the dew
point of the sample gas.
NOTE
The notes for calibrating must be considered.