Hach Ultra MET ONE 237AB, User Manual

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• The total count data returned from the particle counter must be normalized to counts
per unit volume to obtain a correct classification. The PortAll software will
automatically normalize (counts x 10) the count data, but this feature must be setup
(refer to the online User's Guide for instructions). The data normalization settings for a
MET ONE series instruments are saved based on the instrument address. For most
instruments, the sample location (LOC) value is also the serial port address. Make
sure to reset the instrument address after collecting samples in the clean-room and
before connecting the instrument to the PortAll software. Otherwise, the count values
will not be automatically normalized and an erroneous classification could result.
Make sure that the address value does not exceed 31. The PortAll software will not
recognize an instrument whose address is outside of the range of 0-31.
• For ISO 14644–1—The PortAll software stores the ISO classification limits
internally in a table as counts per cubic meter. Normalize the data in the
spreadsheet to counts per cubic meter in order to obtain accurate classifications.
• For FS209E—The PortAll software stores the FS209E classification limits as
counts per cubic foot. Normalize the data in the spreadsheet to counts per cubic
foot in order to obtain accurate classifications..
• Clear the instrument memory before start of a sampling sequence to classify a
clean-room or clean area. The PortAll software spreadsheet of the instrument memory
will then contain only relevant samples to select for the classification calculations.
Note: For complete PortAll software documentation, refer to the PortAll CD.