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18.3 CHECKING FOR GAS-TIGHTNESS
• Connect device to mains supply;
• Set temperature controller to ambient temperature;
The converter must be cooled down to room temperature in order to check for
gas-tightness!
• Switch sample gas path to catalyst operation (lower green LED lights up);
• Seal sample gas outlet tightly;
• Connect sample gas outlet with U-tube manometer or similar for 0.6 bar and upstream stopcock;
• Release air using the stopcock until the manometer displays a pressure of approximately 0.5 bar;
Do not exceed the maximum operating pressure of 2 bar absolute!
• Close stopcock;
A pressure drop of 0.01 bar in 5 minutes is acceptable.
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