Model 420 & 425 Flame Photometer
425 91 001
Issue 22
1
st
December 2016
ECN 1410 & 1932
- 51 -
Cleaning and Maintenance Procedures
continued
8.6
Nebuliser,
continued
8.6.2 Cleaning the Nebuliser
6.
Release the Nebuliser Retainer (item 2, figure 2.1) and withdraw the
Nebuliser (item 1, figure 2.1).
7.
Remove the Nebuliser Inlet Tube. Insert a Cleaning Wire into the capillary
tube at the rear of the Nebuliser and pull right through.
8.
Insert the Cleaning Wire into the Nebuliser Inlet Tube and pull right through.
Inspect the Nebuliser Inlet Tube; replace if signs of wear or accumulation of
particles are apparent.
9.
With the Nebuliser Inlet Tube removed, but with the Nebuliser attached to the
Air Tubing, place a finger over the Nebuliser Outlet Nozzle , turn on the air
supply to force any residue out of the Nebuliser’s capillary tube.
10.
Refit the nebuliser inlet tubing to the nebuliser. Recheck the aspiration rate,
paragraphs 3, 4, and 5.
11.
If nebuliser operation is still outside the specification, unscrew the air line
connector and remove the nebuliser inlet tubing.
11.
Soak the nebuliser in a 1 in 100 dilution of Cleaning Solution, agitating it
periodically.
12.
Rinse thoroughly in deionised water and shake dry.
13.
Refit the nebuliser inlet tubing and the air line. Re-check aspiration rate.
14.
If the nebuliser operation is still unsatisfactory, fit a new nebuliser.