SKC Limited EPAM-7500 - Manual (Page 51)

5-8
Cleaning the Impactors
Introduction
Impactors should be disassembled and cleaned and greased at regular
intervals.
Example: You should clean impactors every thirtieth sample or once a month
to start, but heavy loadings are observed on the target disk, as often as
appropriate.
Cleaning the
Impactors Follow the Steps in the table below to clean the impactors.
Step Action
1 Pushing with a pen from bottom remove the impactor through
top of impactor sleeve into the palm of your free hand.
2 Rinse the impactor from top to bottom with a solvent
(hexane, white gas, lantern gas) using a squeeze bottle,
paying particular attention to the impaction target disks. An
acceptable alternative method of cleaning involves the use of
an ultrasonic bath with mild soapy water solution.
Note: The impaction cup should be removed prior to re-
greasing. This is accomplished by pulling the impaction cup
apart from the impactor jet gently.
3 Let all parts of the impactor air-dry.
4 Prepare a mixture of solvent and impactor grease (Apiezon ®
M, Glisseal ® Ht) or similar grease in a dropper bottle until
thoroughly mixed and of a fluid consistency. Use a 1-inch
length of grease to 30ml of solvent. Vigorously shake the
mixture until an opaque, uniform suspension, free from
grease globs, is obtained.