Hach 8000A Manuel D'utilisation page 14

does not happen, an error message will appear. The error message
must be cleared before operation can continue.
5. Make sure that at least one YES appears in the Affects Results?
column. This column specifies whether or not data in the channel is
used to determine if the data is in accordance with the specified
cleanliness class.
By default, the display shows YES in this column for Channel 1.
6. Push EXIT to go back to the Parameters Functions Setup Menu.
3000A setup parameters
This menu is used to set up a 3000A auto sampler for use with the
instrument.
1. In the Parameter Setup Functions menu, push 3000A SMPLR.
2. Push 3000A SETUP.
The display shows the setup screen.
3. Update or change the parameters.
Option Description
Flow rate Flow rate through the sampler. Range: 10 to 100 mL/minute.
Syringe size The size of the syringe used—1, 10 or 25 mL
Tare volume The sampler draws this volume in mL before counting begins
to make sure the flow rate is stable. The default tare volume
is 5% of the syringe size. This is the recommended tare
volume. The value can be changed.
LOAD SYRNG, BACK FLUSH, PRIME and TARE ONLY functions
These functions are part of the Model 3000A Sampler Functions Menu.
The functions are described in Table
14 English
3.
Table 3 LOAD SYRNG, BACK FLUSH, PRIME and TARE ONLY
Function Description
LOAD SYRNG Makes the counter pull the syringe plunger drive screw to the
bottom travel point. This allows the syringe to be loaded or
unloaded. Refer to the Model 3000A Operator Manual for more
information on how to load or unload syringes.
PRIME Makes the Model 3000A run three consecutive samples through
the system. This can clear air bubbles that can affect results.
BACK FLUSH Reverses the flow through the system. This action can help
clear sensor blockages.
TARE ONLY Makes the Model 3000A pull only the tare volume through the
instrument. This is useful for the volumetric accuracy test
necessary for USP <788>, JP <13> or EP <99> standards.
Set the instrument alarms
Use the alarm function to display and change the alarm settings for each
counter. Each counter alarm condition can be controlled independently.
Alarms can be set to test for Rate, Greater Than (>) or Less Than (<)
conditions.
Alarm volume can be adjusted on the rear panel of the instrument.
1. In the Miscellaneous functions menu, push SET ALRMS.
The Alarm settings screen appears.
2. Update or change the Alarm settings.
Option Description
Alarm Enter a value between 1 and 8 to designate which channel to
channel test for an alarm condition. Cumulative data is used for the test
for all three alarm conditions.
functions