AO2000
CONTINUOUS GAS ANALYZERS | OI/AO2000-EN REV. B
47
A housing purge with nitrogen must be provided for the measurement of
flammable gases and vapors. Flame barriers can be used as an option (with
the exception of the 'Safety Concept' version (see page 20)). Pressure drop
at the flame barriers approx. 40 hPa with a sample gas flow rate of 50 l/h.
Material of the flame barriers: Stainless steel 1.4571.
Prior to using the analyzer module, the corrosion resistance of the sample
gas must be tested.
Test gases
Zero-point calibration
Test gas, sample-component-free process gas or substitute gas
End-point calibration
Test gas, process gas with a known sample gas concentration or substitute
gas
Caldos27 with standard gas calibration
Standard gas with a defined relative thermal conductivity (rTC)
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 (see page 234) must be considered.
Pressure sensor
The pressure sensor is installed in the gas analyzer ex works. It is connected
to a connection port via an FPM tube.
Gas connections
see section "Caldos27: Gas connections" (see page 82)
