46 AO2000 CONTINUOUS GAS ANALYZERS | OI/AO2000-EN REV. B
Caldos27: Preparation for installation
Installation site
Ambient temperature
During operation with analyzer module installed in a system housing
+5 to +50 °C without electronics module
+5 to +45 °C with electronics module or with power supply only
Vibrations/shocks
max. ±0.04 mm at 5 to 55 Hz, 0.5 g at 55 to 150 Hz
Sample gas
Sample gas inlet conditions
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.
When there is a direct sample chamber connection the
maximum sample gas dew point is 55 °C.
Fluctuations in water vapor content 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
chamber max. 100 hPa.
Flow 10 to 90 l/h, min. 1 l/h
Remark: Sample gas temperature, pressure and flow rate should be main-
tained constant to such a degree that the fluctuation influence on the accu-
racy of measurement is acceptable (see also chapter "Analyzer module oper-
ating data" (see page 346)).
Corrosive gases
If the sample gas contains Cl
2
, HCl, HF, SO
2
, NH
3
, H
2
S or other corrosive
components, ABB Analytical must be consulted.
If the sample gas contains NH
3
, flexible tubes of FPM may not be used; flexi-
ble tubes of FFKM must be used instead. In this case, the pneumatic module
cannot be connected to the analyzer module.
Flammable gases
The analyzer module is suitable for the measurement of flammable gases
and vapors under atmospheric conditions (p
abs
≤ 1.1 bar, oxygen content
≤ 21 vol.%). Temperature class: T4.
The sample gas may not be potentially explosive in normal operation; if it is
potentially explosive in the event of faults in the sample gas supply, then
only rarely and for a short time (corresponding to Zone 2).
Pressure in the sample gas path in normal operation p
e
≤ 100 hPa; in the
event of faults in the sample gas supply, the pressure may not exceed the
maximum value of p
e
= 500 hPa.
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