User's Manual for CM6G - Yokogawa

10-210.2 Regular CheckRefer to Figure 6.2 , 6.3 and 6.4. The flow sheet depends on the specification.10.2.1 Cleaning of the Orifice Plate and Replacement of O-ringWhen something like dust adhere to the orifice holes, the output power decreased.Therefore, clean them with the following way:CROTCHET JOINTHOLDINGSCREWORIFICEASSEMBLYO-RING (P16)ORIFICEPLATECOVERPLATEO-RING (P20)HEX. HOLE SCREWF10-2.aiFigure 10.2 Orifice Systema) Suspend the supply of the sample gas, then blow the gas line with the air.b) Remove the crotchet joint.c) Turn the holding screw and take out.d) Pull out slowly to the direction as shown on Figure 10.2.e) Loosen the set screw by using the hexagonal wrench attached there-to and take out the orificeplate together with the cover plate.f) For the cleaning use something like a supersonic cleaner and never insert into the orifice holesanything like a stick or rod.g) When the O-rings are worn out, replace them with the spare parts.h) When the cleaning and replacement completed, assemble the parts according to the ordercontrary to above mentioned.Remarks: The orifice system is temperature controlled by a plate heater, so better finish thecleaning and replacement as quick as possible.IM 11R02A01-02E