Hach 8000A Manuel D'utilisation page 10

Push EXIT to exit the Counter Parameters Menu.
1. From the Parameter Setup menu, select CNTR SETUP.
2. Use the up and down arrow keys to enter up to 4 identifiers for a
sample in the fields. Identifiers can be used for the product name,
batch number, lot number, sample runs, etc. Each field entry can be
up to 8 characters long. Push Enter to move to the next field.
3. Activate or inactivate the background subtraction feature.
Background Subtraction compensates for background counts in a
diluent when a diluted sample is analyzed.
a. Do several sample runs with the volume of diluent present in the
diluted samples.
b. Use the SAVE BKGRD function to save the run data (or averaged
data) as a background, then activate background subtraction.
Background subtraction occurs before dilution factor
multiplication.
4. Enter a Dilution Factor between 1.00 and 1,000,000. This value is
the dilution factor needed to bring a viscous or concentrated solution
within the limits of the sensor.
5. Select a standard. The firmware of the Model 8000A has the
standard parameters for NAS 1638, ISO4406, MIL-STD-1246C, USP
<788>, JP<13>, EP<99> and Fed-Std-209E analyses. A User
Defined Standard can be entered in the User Defined Standard
Functions Menu. Only one User Defined Standard can be entered.
Option Description
NAS 1638 Industry standard for classification of liquids
according to cleanliness level.
ISO4406 Industry standard for classification of liquids
according to cleanliness level.
MIL-STD_1246C Industry standard for classification of liquids
according to cleanliness level.
USP<788> Industry standard for classification of liquids
according to cleanliness level.
JP<13> Standard used by the parenteral drug industry.
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Option Description
EP<99> Standard used by the parenteral drug industry.
Fed-Std-209E Industry standard for classes of air cleanliness for
airborne particulate levels in cleanrooms and clean
zones.
User defined Standard created by the user.
standard
6. Select a mode. The choice of mode may affect the parameters
shown on the screen.
Option Description
Time Sets the amount of time that particles are counted. Time Mode is
automatically entered when Fed-Std-209E is selected.
Manual Start or stop the counter with the START and STOP buttons.
Counts The counter samples until a specific count is exceeded in a
designated count channel. The channel and count values are
designated in the counter parameters page of Setup. The number
of counts in the count channel may exceed the limit before
counting stops.
Volume Select this mode if sampling is controlled by an external volume
sampler. Volume mode is automatically selected when <788>,
JP<13> or EP <99> is used.
7. Enter a value for the Stabiliz Delay in 00 H, 00 M, 00S to 02 H, 59 M,
59 S. A typical delay time is less than one minute.
8. Enter the number of the channel, between 1 and 8. This is the
channel that will be periodically monitored by the counter to
determine if the cumulative counts have been exceeded. The default
channel number is 1. This field is only active if the Counts Mode has
been selected.
9. Enter a value for the Cumulative Limit from 1 to 9999999.
When the counter monitors the Counts Channel, the counts value is
compared to the Cumulative Limit. If the limit is exceeded, the
sample run stops. It is possible for the count to exceed the
Cumulative Limit before the run is terminated. The default