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

Commissioning: Preparation

7.4 ULTRAMAT 7

4. Then close the sample gas inlet.
5. Wait for approximately 1 minute until the test gas that flowed in has reached the ambient
temperature.
6. Note the pressure.
7. Wait approximately 5 minutes. Note the pressure again.
If the pressure change is < 10 hPa, the sample gas path is adequately tight.
Procedure - devices with tubes
1. Close the reference gas inlet and, for versions with an external reference gas pump, also
the bypass outlet.
2. Connect the sample gas outlet to a pressure measuring instrument.
3. Apply pressure of approximately 1 500 hPa (absolute pressure) to the sample gas inlet.
4. Then close the sample gas inlet.
5. Wait for approximately 1 minute until the test gas that flowed in has reached the ambient
temperature.
6. Note the pressure.
7. Wait approximately 5 minutes. Note the pressure again.
If pressure change is < 28 hPa, or < 34 hPa in the case of versions with an external
reference gas pump, the sample gas path is adequately tight.
7.4 ULTRAMAT 7
7.4.1

Sample gas inlet conditions

Implement the appropriate gas preparation (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.
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Compact Operating Instructions, 06/2017, A5E31805656-05
Quick Start