Lighthouse HANDHELD 2016, 3016, 5016 Gen F Operating Manual
5-2
248083400-1 Rev 7
For the Fed Std 209E (ft) report, the classification for a particle size is
based on its samples taken from all locations in the cleanroom. Each
particle size is given one of the following results:
• A classification rating which will be one of the possible
classifications (1, 10, 100, 1000, 10000, 100000).
• “Unable to Classify” if it fails one of the above requirements.
• An “Out of Range” if the calculated classification at that
particle count exceeds 100,000.
ISO 14644-1
The minimum number of locations is 1.
At least 1 sample must be taken per location.
At least 3 samples, total, must be taken in the cleanroom. The user can
take a different number of samples at different locations.
The minimum sample volume is 2 liters.
This report has a minimum Sample Time of 1 minute. If the Sample
Time is less than that, the entire room would fail the classification.
The 95% Upper Confidence Limit (UCL) must be calculated if the
number of sampled locations is less than or equal to 9.
EU GMP 2009
The EU GMP 2009 only applies to 2 channel sizes: 0.5μ and 5.0μ.
There are only 4 Classes: A, B, C, D, and 2 cleanroom states: At Rest
and Operational.
Class D is not applicable when the cleanroom is Operational.
If one of these channel sizes is not present, the report cannot classify
the room.
The standard does not define a minimum number of sample locations
or a minimum number of samples. In order to take a measurement, at
least 1 location and 1 sample are required by the counter.
The standard does not require a minimum sample volume. The volume
of air must be shown in liters (L).
To Next Page
Loading...
