Beckman Coulter HHPC+ Série Manuel D'utilisation page 13

Verify instrument operation
Electrical noise, sensor leakage or other interference can cause the instrument to give incorrect data.
To make sure the instrument operates correctly:
1. Attach the Zero-Count Filter.
2. In the Data Display Setup screen, select the 0.3 µm channel and set the Concentration mode to
COUNTS.
3. In the Sample Setup screen, set the sample time to 5 minutes, the hold time to 00:00:00, the
delay time to 00:00:03, the MODE to Automatic and the number of CYCLES to 2.
4. Start the Product sampling and let it complete the 2 x 5 minute samples.
5. Examine the particle counts in the last sample. Counts must align with these specifications for
instrument operation to be verified: No more than 1 particle > 0.3 µm in 5 minutes.
Purge the instrument
Remove unwanted materials from the instrument before it is used in a clean-room or clean
manufacturing environment. Also do this procedure after each high sampling count to help keep the
internal sensor clean.
1. Install the zero count filter.
2. Set the instrument to sample continuously. Set the Count Mode to Rate.
3. Start the count process. Continue the count process until there are no new counts.
4. Remove the zero count filter for normal operation.
Sample setup
Refer to the help screen for more information.
Change the settings for how the instrument runs a sampling process in the Sample Setup menu.
Sub-menus include options for Location, Alarms and Data display setups. To update or change the
Sample Setup settings:
1. Push the Menu button.
2. Navigate to the Sample Setup icon, then push the Select key.
3. Change the settings for the options. Default values are shown in parentheses.
Option Description
Method (Time): The instrument gets a sample for the amount of time in the Time field.
Volume: The instrument gets a sample equal to the value in the Volume field.
Time The instrument gets a sample for the amount of time that is put in this field. Range: 00:00:01 to
23:59:59 (00:01:00). In the Time based sampling method, this value plus the hold time equals one
cycle.
Volume The instrument gets a sample equal to the volume put in this field. In the Volume based sampling
method, this value plus the hold time equals one cycle and the sample time remaining is an
estimated value.
Hold The amount of time between samples. Range: (00:00:00) to 23:59:59.
Delay The period of time before the first sample starts after the Start key is pushed. Range: (00:00:03) to
23:59:59
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