4 Operating the 850-DS
62 850-DS Operator’s Manual
The Agilent 850-DS can perform a manual or an automated flush of all of the
tubing. This screen allows a manual cleaning cycle to be started. If Enable
Cleaning Cycle is selected in a method, the parameters entered on this screen are
used to control the cleaning cycle.
Option Description
Cleaning Cycle Volume Enter the volume that will be pumped though the tubing.
# Cycles to Run This controls how many times the above volume will be repeated.
Run Starts a cleaning cycle with the entered parameters.
Stop Stops a cleaning cycle.
Source Rinse Port This selects the rinse port as the source of the rinse media. Connect an
appropriate container to the Agilent 850-DS rinse port with a length of
1/4 inch tubing. At the start of the cleaning cycle, an internal pump fills
the rinse reservoir on the tray assembly. The needles are lowered into
the rinse media and the specified volume is pumped from the needles
through the sample tubing and then through the return tubing. All lines
will then be purged with air to eliminate as much liquid from the tubing
as possible.
Sample Cannula Selects the sample cannula as the inlet source. At the start of a
cleaning cycle, the syringe pump moves the volume specified from the
sample cannula through the return tubing. A smaller fixed volume of
0.7 mL will be pumped through the needles into the waste row. All lines
will then be purged with air to eliminate as much liquid from the tubing
as possible. It is the responsibility of the user to properly submerge the
sample cannulas in the appropriate rinse solution prior to this cycle.
Reservoirs Rinse Media Replacement Enable this option to rinse the internal media replacement reservoir
after each test with rinse solution. The reservoir will be filled and
emptied based on the number of cycles defined.
Rinse Waste Enable this option to rinse the internal waste reservoir after each test
with rinse solution. The reservoir will be filled and emptied based on the
number of cycles defined.
# Cycles to Run This value defines how many times the appropriate reservoirs will be
filled and emptied with rinse solution at the conclusion of each test.
Rinsing of these reservoirs serves to prepare the system for the next
test as well as flush the internal volume sensors to prevent long term
damage.
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