Hach Ultra MET ONE 227, Руководство пользователя

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Appendix B PortAll Software
The clean-room classification standards FS 209E and ISO 14644–1 require specific
particle count measurements and calculations to verify the cleanliness level of a
clean-room or clean area. The PortAll software can use the measurement data from the
MET ONE 227 particle counter to generate clean-room verification results automatically.
B.1 Connections
Note: The PortAll software is provided with an adapter that can be used use with a standard 9-pin to
9-pin serial cable instead of a special cable that is required for a serial interface.
In order to communicate with a computer, set the RS232 mode below the SIO menu to
Normal (printer disabled). Make sure that the location number is set between 0 and 31
(refer to
Figure 42 ). This enables the PortAll software to recognize the MET ONE 227
particle counter. After any communication with the computer, the keypad of the
MET ONE 227 particle counter is disabled until the power is cycled off and on.
B.2 Operation
Perform the following procedures to make sure that an accurate classification result is
obtained from the PortAll software.
• The data returned from the particle counter contains a location number for each
sample. Use the front panel instrument controls to change the location number each
time the instrument is moved to a new location.
Note: The PortAll software relies on the location number as an accurate indicator of the number
of sample locations and number of samples per location.
• Set the sample time to obtain the required sample volume at each location (Sample
Time x Instrument Flow Rate = Sample Volume). The PortAll software does not have
access to the instrument flow rate and has no way to verify that the sample volume
complies with standard requirements. It is necessary to set up the MET ONE 227
particle counter as follows:
• Sample period to one minute (0.1 cubic ft) and select Normalize Data (counts x
10) in PortAll
OR
• Sample period to 10 minutes (1.0 cubic ft) and do not select Normalize Data
in PortAll
Figure 42 MET ONE 227 particle counter connections
1 Computer 3 Standard 9-pin serial cable
2 PortAll adapter 4 MET ONE 227 particle counter