PerkinElmer aanalyst 200, User Manual

Page: 264 / 328

Maintenance
9-20
Table 9- 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)
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. If the gauge is loose in the slot, the slot is too wide.
Then, discard the burner head and use a new one.
Burner head surface
The condition of the top surface of the burner head along the slot influences the stability of the
signals. Discard the burner head if the top surface is corroded.