ASTM F 25 : 1968 : R1999

1.1 This test method covers counting and sizing airborne particulate matter 5 [mu]m and larger. The sampling areas are specifically those with contamination levels typical of clean rooms (white and gray rooms) and dust-controlled areas designed for electronic work. It is not a test method for dust counting where isokinetic sampling is a factor (Appendix X1).

1.2 The values stated in inch-pound units are to be regarded as the standard. The values given in parentheses are for information only.

1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.

Note 1-Information is included relative to modifications to the referee techniques which will make the test method more suitable for specific routine monitoring, such as described in Appendix X4.