Connecting
5.3 Gas connections
FIDAMAT 6
Operating Instructions, 01/2019, A5E00222135-04
45
Pressure sensors
The FIDAMAT 6 has two internal pressure sensors for measuring the sample gas pressure
(= combustion air pressure) and the combustion gas pressure.
Sample gas path in the device (containment system)
Materials that come in contact with the sample gas must be resistant to it. The gas paths and
gaskets are made of stainless steel 1.4571 / 1.4404 (gas outlets), graphite and/or PTFE.
To guarantee the leak-tightness of the containment system, perform a periodic leak test. If
leaks are discovered, eliminate the cause before restarting measurements. Replacement of
gaskets is one possible action for this.
Note
Always perform a leak test after service work on the containment system. For m
ore
information, refer to the section "
Checking for leaks (Page 56)".
5.3.1 Connecting gas
Proceed as follows:
1. Connect the gas lines to the associated gas inlets and outlets using suitable bulkhead
unions.
When tightening the union nuts at the gas connection fittings, make sure that you counter
properly.
2. Check the bulkhead unions for secure connection and check the pipe unions for leaks
(Page 56).
5.3.2 Sample gas disposal
Note
Environmentally responsible disposal
If the gases released in this way are toxic or otherwise harmful to health, it is essential that
they are
discharged in such a way that no risk is posed to human health or the environment.
The majority of the supplied sample gas is routed via a bypass to the gas exhaust.
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