Gas Connections And Internal Gas Paths - Siemens ULTRAMAT 23 Operating Instructions Manual

Installation Guidelines
2.3

Gas Connections and Internal Gas Paths

Sample gas line
Paths for AUTO-
CAL/zero gas
Path for chopper
section purging
Path for pressure
sensor
Gas connections
and gas paths
2-4
A pipe with an outer diameter of 6 mm or 1/4" is present as the gas
connection.
Materials to be used: must be suitable for the respective measurement.
If the sample gas is to flow into a collective exhaust line, observe the
following points:
S
The exhaust line must be free of rapid changes in pressure. If this is
not possible, either use a separate exhaust line or
S
fit a damping vessel ( > 1 l) between the analyzer and the exhaust
line.
S
The exhaust line should always be routed with a falling gradient
since water make condense in it.
The corresponding gases must be sucked in via a fine filter. The
amount of the measured gas component must be negligibly small in the
AUTOCAL gas (zero gas). In particular when carrying out an
AUTOCAL for CO ranges < 3 %, the air must be routed via a CO
2
absorber (e.g. soda lime).
With certain CO ranges (see Section 3), the chopper section is purged
2
with clean nitrogen or CO
to 350 kPa.
The internal atmospheric pressure sensor is routed to connection 6 in
the 19" rack version via a hose. 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.
Refer to the Technical Description (Chapter 3) in this Manual.
free synthetic air at an inlet pressure of 300
2-
Operating instructions ULTRAMAT 23 gas analyzer
2
C79000-B5276-C216-03