Agilent Technologies G6600-90006 - Manual (Page 95)

Operation and Maintenance Manual 95
Assembling the Dual Plasma Burner for Component Replacement with the
NCD
The following procedure can be used to assemble the Dual Plasma Burner for
use with the NCD or for replacement of Burner components, such as ceramic
tubes. Refer to
Figure 2 on page 27 for proper part nomenclature. Note that the
lower section of the NCD Burner is identical to the lower section of the SCD
Burner.
1 Slide the 0.066" internal diameter (I.D.) double taper ferrule onto the lower
Burner tube. The tube should extend approximately 2 mm past the end of
the ferrule.
2 Insert the lower Burner tube and double taper ferrule into the Burner inlet
fitting.
3 Slide the 1/4" Burner adapter over the top of the lower Burner tube all the
way down to the Burner inlet fitting and screw it onto the fitting
finger-tight.
4 Slide a 1/4" Swagelok nut over the Burner adapter and then slide a 1/4"
ferrule over the Burner adapter and position it into the 1/4" nut.
5 Center the lower Burner tube so that it will slide into the tapered union.
Insert the lower end of the tapered union fitting into the 1/4" Swagelok nut
and screw it on finger-tight. If necessary, the brazed H
2
line can be gently
bent out of the way. Be careful not to stress the brazed (welded) connection.
6 Find the quartz combustion tube, 1/4" ferrule and quartz heater assembly.
7 Insert the quartz tube into the quartz heater assembly. Position a 1/4"
ferrule (flat end butted up against the top of the swivel nut) onto the quartz
combustion tube. With the ferrule positioned against the swivel nut,
approximately 0.5 cm of the quartz tube should extend outside the nut.
N O T E
While the use of 1/4" ferrules is optional with the SCD, the quartz tube used in the NCD
Burner is more fragile and the use of 1/4" graphite ferrules is highly recommended.
Figure 32 Ferrule Placement on Lower Burner Tube