Scion Instruments
Scion Instruments CO/CO2Analyzer Page 6
TUNING OF THE CO/CO2 CHANNEL
Connect the columns according the flow schematics given in Section 6
and adjust the flows (if necessary) at an oven temperature of 50°C.
Take very good care not to create any dead volume.
•Set the injection/backflush valve V1 to the inject (+) position.
•Disconnect both columns from the pressure point Tee and connect both
columns to each other using a 1/8” union.
•Set the front EFC-24 pressure to give a flow of 20 ml/min measured at the
FID outlet.
•Remove the 1/8 “union between the two columns and reconnect the
columns at the pressure point union Tee.
•Set the middle EFC-24 pressure to give a flow of 25 ml/min measured at the
FID outlet.
•Program for each EFC-24 module the total flow as mentioned in the
'OPERATION' paragraph.
•Adjust the Hydrogen Manual Flow Controller to give a flow of 20 ml/min
measured at the FID outlet (Note: total carrier plus Methanizer hydrogen is
45 ml/min)
•Set the injection/backflush valve to the load(-) position. Set the needle valve
NV-1 controlling the backflush flow to 20 ml/min, to be measured at vent 1.
Check all connections for leakages.
It is advised to use an electronic leak detector, since 'Snoop' or
equivalent soap solutions contaminate the analytical flowpath of
