Dionex AS-HV, Operator'S Manual

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2 • Description
Doc. 065125-01 10/06
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2.4.3 External Peristaltic Pump
The external peristaltic pump (P/N 064508) is a MASTERFLEX C/L
Pump System. A relay cable connects the AS-HV to the terminal strip on
the pump’s rear panel.
When coupled with the external peristaltic pump, the AS-HV is capable
of sample loop loading in either the push or pull mode (see
Section 2.3 ).
This configuration is typically used to load sample when a large sample
loop is installed.
NOTE To minimize potential sample contamination,
Dionex recommends using the pull mode with the
external peristaltic pump.
To ensure optimal performance when doing loop loading with the external
peristaltic pump, follow these guidelines:
•
All points in the system that will be aspirated should be plumbed with
1.0-mm (0.040-in) ID PEEK tubing (P/N 054410).
•
To ensure that the proper sample volume is loaded, measure the flow
rate after replacing any component in the flow path. It is advisable to
measure the flow rate periodically, as flow rates may fluctuate over
time as the columns and peristaltic pump tubing age.
•
Push mode only: The backpressure should not exceed 0.10 MPa
(15 psi).
•
Pull mode only: The maximum flow rate is 1.75 mL/min. The
backpressure should not exceed 0.07 MPa (10 psi).
NOTE A printed copy of the MASTERFLEX C/L Pump
System Operator’s Manual is shipped with the pump.
Before beginning operation with the pump,
familiarize yourself with the content of the manual.