Gas Preparation - Siemens ULTRAMAT 23 Series Equipment Manual

Path for AUTOCAL/zero gas
The gases for the AUTOCAL must be sucked in via a fine filter. The proportion of the measured
gas component in the gas for the AUTOCAL (zero gas) must be negligible. In particular when
carrying out an AUTOCAL for CO
soda lime).
Path for chopper compartment purging
With CO
synthetic air at an inlet pressure of 300 ... 350 kPa (43 ... 51 psi) is to be carried out.
Path for pressure sensor
The internal atmospheric pressure sensor is routed via a hose to connection 6. It is therefore
possible to connect the pressure sensor (e.g. when using analyzer cabinets or houses) such that
it is guaranteed that only changes in atmospheric pressure are recorded.
5.2.2

Gas preparation

The sample gas must be sufficiently conditioned to prevent contamination of the parts through
which it flows. The ULTRAMAT 23 is usually preceded by the following elements:
• Gas sampling device with particle filter
• Sample gas cooler
• Analysis filter (approx. 1-2 μm)
• External gas suction pump (with sample gas lines >20 m/65 1/2 ft)
Note
In the analyzer version with the sample gas path as pipes, there is no safety filter and no
condensation trap in the internal gas path.
• Therefore correct gas preparation must always be ensured.
• Depending on the composition of the sample gas, additional equipment may be necessary
such as e.g.
– A washbottle
– Additional filters
– Pressure reducer.
ULTRAMAT 23
Equipment Manual, 04/2022, A5E37100388-012
ranges <0.1 vol%, a chopper compartment purging with clean nitrogen or CO
2
5.2 Gas connections and internal gas path
ranges <1 vol%, the air must be routed via a CO
2
Connecting
absorber (e.g.
2
-free
2
71