Ultramat 7; Sample Gas Inlet Conditions; Flow-Type Reference Gas Compartment - Siemens SIPROCESS GA700 Quick Start Manual

7.4

ULTRAMAT 7

7.4.1

Sample gas inlet conditions

Implement the appropriate measures (e.g. cooler, condensate separator, heated device) to
avoid condensation on individual sample gas components in the device.
7.4.2

Flow-type reference gas compartment

Selection of the reference gas
In an analyzer module without physically suppressed zero point, i.e. with characteristic initial
value of zero, use nitrogen as the reference gas (purity 4.6).
In an analyzer module with a physically suppressed zero point, use the appropriate reference
gas. The concentration of the reference gas generally corresponds to the characteristic initial
value or, in special cases, the full-scale value or intermediate values.
In order to compensate for interference, the reference gas compartment can be subjected to
the purified sample gas of the measured component (absorber mode) or gas out of the cylinder,
which corresponds to the average interference gas composition.
Reference gas connection
Depending on the version, the reference gas connection is designed either for normal or
reduced flow.
Reduced flow-type reference gas compartment
In an analyzer module with reduced flow-type reference gas compartment, the reference gas
flows at 9 ml/min at 3000 hPa inlet pressure (abs.).
Connecting the reduced flow-type reference gas compartment
Make sure that you connect the reference gas inlet and outlet properly.
If you swap the reference gas inlet and outlet, excessive pressure will be created during
operation. This can lead to measurement errors or damage to the analyzer chamber.
Note
Gas supply
The gas supply of the reduced flow-type reference compartment must have a pressure of 2000
to 4000 hPa (abs.).
Following maintenance or service measures on the analyzer section or gas path, perform a
leak test again.
Quick Start
Compact Operating Instructions, 05/2015, A5E31805656-03
CAUTION
Commissioning: Preparation
7.4 ULTRAMAT 7
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