PerkinElmer PINAACLE 900 Series, Customer Hardware And Service Manual

Page: 231 / 390

215
Cleaning the Burner Head
8. Close the atomizer compartment door.
Complete Cleaning Procedure
If the quick cleaning procedure, above, fails to remove deposits or if you wish to
clean the burner head more thoroughly, see
Changing the Fuses on page 206 .
Checking the Slot Width
Over time, the burner slot becomes wider due to abrasion. The level of abrasion
depends on the types of solutions you are aspirating. A burner slot that is too wide
causes unstable flame conditions and, in the worst case, may cause a flashback of
the flame. For this reason you should check the width of the burner slot at regular
intervals.
A set of feeler gauges is required to check the slot width. The table below specifies
the correct slot width and the feeler gauge required for checking.
To check the slot width:
1. Carefully slide the specified feeler gauge through the length of the burner slot.
2. The gauge must fit tightly in the slot.
3. The slot is too wide if the gauge is loose along the slot. If the slot is too wide,
replace the burner head with a new one.
Table 6-1. Slot Width and Feeler Gauge
Burner Head Slot Width Tolerance
Feeler Gauge
for check
air-acetylene 0.65 mm
(0.026 inch)

0.075/-0.025 mm
(


0.003/-0.001 inch)
0.7 mm
(0.030 inch)
N
2
O-acetylene 0.5 mm
(0.020 inch)


0.025 mm
(

0.001 inch)
0.5 mm
(0.020 inch)