Table of Contents
Advertisement
Section 6
6.1
General
The design of the Model PFP7 is such that maintenance requirements are minimal. To maintain
good performance and prolong the life of the instrument it is important that the procedures
defined in the manual are carried out regularly. The performance of the instrument depends
upon an adequate supply of compressed air. Recommended compressor maintenance
procedures should be carried out to ensure that compressor performance does not deteriorate.
6.2
Weekly maintenance
Ensure efficient nebuliser operation.
Equipment required:
1. Switch on the air supply to the flame photometer but do not light the flame.
2. Fill the measuring cylinder with deionised water and present to the nebuliser inlet tube
for one minute.
3. The consumption rate should be between 2 and 6ml/min. If correct, no further action is
required.
4. If the consumption rate is too low, this is likely to be caused by a blockage in the fine
capillary tubes and can usually be cleared by passing the cleaning wire through the
nebuliser. If, after taking this action and re-checking the consumption rate it is still too
low, then the inlet tube should be discarded and the test repeated using fresh tubing.
5. If the nebuliser operation is still unsatisfactory, remove the nebuliser from the mixing
chamber, disconnect from the air line, remove the inlet tubing and soak the nebuliser in
hot deionised water.
6. Refit the nebuliser and repeat the test.
7. If operation is still unsatisfactory, a new nebuliser should be fitted.
NOTE: Under no circumstances should the nebuliser be adjusted.
6.3
Monthly maintenance
Equipment required:
1. Carry out the Weekly maintenance schedule.
2. With the flame alight aspirate a 1 in 100 diluted sample of cleaning solution for 30
minutes, followed by deionised water for a further 30 minutes.
Maintenance
10ml graduated measuring cylinder
Stop watch
Cleaning wire (500 194)
10ml graduated measuring cylinder
Stop watch
Cleaning wire (500 194)
Cleaning solution (025 171)
23
PFP7/REV C/01-08
Advertisement
Table of Contents
