Checking The Sample Gas And Reference Gas Path For Leakage; Interference Gases/Zero Point Error - Siemens SIPROCESS GA700 Quick Start Manual

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.
Setting the flow
Make sure that the flow of sample gas and reference gas is set to the same level.
7.4.3

Checking the sample gas and reference gas path for leakage

Piped analyzer modules
NOTICE
Maximum permissible reference gas pressure
Ensure that the pressure of the introduced sample and reference gas does not exceed
2600 hPa (absolute) for a piped configuration.
Note
Test values
The test values have been defined under the assumption that the total volume of the gas
path in the analyzer module and the connection line to the pressure measuring device is
80 ml.
1. Close the sample gas/reference gas outlet.
2. Pressurize the sample gas/reference gas path with overpressure of 100 hPa.
3. Wait for approximately 1 minute until the sample gas/reference gas reaches the ambient
temperature.
4. Note the pressure.
5. Wait approximately 5 minutes. Note the pressure again.
The sample gas/reference gas path is sufficiently tight if the pressure has not changed by
more than 1 hPa.*
7.4.4

Interference gases/zero point error

Keep the ambient air of the analyzer section free from the measured gas component;
otherwise, measurement results will be affected. Gases which exhibit cross-sensitivity to the
measured gas component must also not be present in the ambient air.
Quick Start
Compact Operating Instructions, 06/2017, A5E31805656-05
Commissioning: Preparation
7.4 ULTRAMAT 7
85