Startup
5.2 Preparation for startup
SIPROCESS UV600
Operating Instructions, 10/2013, A5E03529375-02
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Gas sampling and preparation
Components for gas preparation (e.g. gas sampling devices, gas coolers, condensation
traps, filters) are usually positioned upstream of the analyzer depending on the condition of
the gas to be measured. These devices, and any controllers, recorders or displays which
may be connected, must be fully functional prior to starting up the analyzer (refer to the
associated Manuals).
To achieve perfect gas preparation, you must particularly observe the following points:
●
The sample gas must be free from dust and condensation. An upstream dust filter must
reliably filter out dust particles of > 2 µm. To avoid condensation in the sample gas line,
the sample gas may have to be passed through a suitable gas cooler.
●
Components which could interfere with the measurement must be removed by
appropriate absorption filters.
●
The dew point must not exceed 4 °C.
5.2.2
Leak test
Before connecting sample gas and calibration gas to the analyzer, you must check the gas
connections and the internal gas path for leaks. To do this, proceed as follows:
1. Close the sample gas outlet using an appropriate dummy plug or seal.
2. Connect the sample gas inlet to an appropriate inert gas supply.
3. The supply line must contain a suitable pressure sensor (measuring range 2 000 hPa,
resolution 0,1 hPa).
4. Apply a pressure of approx. 100 hPa to the sample gas path.
5. Wait for approx. 5 minutes to allow thermal equilibrium.
6. Note the pressure.
7. Wait a further 15 minutes and then note the pressure again.
8. The sample gas path is sufficiently tight if the pressure has not changed by more than
1 hPa after this time.