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3.2 Piping method
(1) Piping procedure
Connect pipes to the gas inlets and outlets located at the top left on the analyzer rear.
Use anticorrosive tubes made of Teflon, stainless steel, polyethylene or the like for connecting the
analyzer and sampling system. Avoid using rubber or soft vinyl tubes even if there is no worry about
corrosion. Improper piping material may cause inaccurate indication due to adsorption of gas.
The pipe connections are Rc1/4 (PT1/4) internal thread. And the pipes should be kept as short as
possible to quicken the response. A suitable inner diameter is about 4mm. Note that dust entering
the analyzer may cause a malfunction, so be sure to use clean pipes and joints.
Carry out gas piping as follows.
• Use clean pipes of which inside should not be stained with deposits of oil or fat.
• Piping joints must be tightened firmly to avoid gas leakage.
• Exhaust gas should be discharged to an outdoor safe place to prevent it from staying in the
sampling device and indoors.
• Exhaust from the analyzer should be relieved at the atmospheric pressure in order that an
unnecessary pressure will not be applied to the analyzer. Otherwise, any pipe in the
analyzer may be disconnected to cause gas leakage.
DANGER
Purge gas inlet :
Connect purge gas pipe here.
Reference gas outlet :
Connect pipe here for discharging reference gas.
Reference gas inlet :
Connect reference gas here in case of flow differential system.
Sample gas outlet :
Connect pipe here for discharging measured gas.
Sample gas inlet :
Connect gas to be measured here.
