jenway PFP7 - Trouble Shooting; General; Unstable Results; Unable to Set Standard Reading

Section 7
Trouble shooting
7.1 General
This section is a step-by step guide that should allow an operator to take appropriate
actions to clear simple
faults. Any action not defined in this trouble shooting guide should only be undertaken by qualified
personnel.
7.2 Unstable results
Possible cause
Solution
Condensation in the air supply.
Drain the tubing. If the problem persists a moisture-free air supply
should be arranged by using a water separator.
Nebuliser blocked.
Check the nebuliser performance as defined in Section 6.2, Weekly
maintenance.
Flame temperature not correctly set.
Ensure that the fuel valve is correctly set for the element being
determined; refer to Section 4.2, Operation.
Fuel cylinder nearly empty.
Replace cylinder with a fully charged one.
Instrument in strong draught.
Relocate the instrument.
Instrument in very bright sunlight.
Relocate the instrument.
Instrument not draining correctly.
Ensure the “U” tube is clear of blockages and that the drain trap is
at the correct l
evel i.e. pushed down fully so the rim at the top is
resting on the clip.
Atmosphere contaminated.
Remove source of contamination or improve ventilation.
Mixing chamber/burner
contaminated.
Carry out the six-monthly maintenance procedures as defined in
section 6.4
Ensure the instrument is always flushed with deionised water
before shutdown.
7.3 Unable to set standard reading
Possible cause
Solution
Calibration standard at incorrect
concentration or incorrectly diluted.
Make new standards to check the calibration
procedure.
Blank calibration standard
contaminated or incorrectly set.
Re-make standard and re-set blank.
500 795/Rev E/03-17
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