Dionex AS-HV, Operator'S Manual

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2 • Description
Doc. 065125-01 10/06
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2.4 Sample Loading Pumps
This section provides a brief overview of the sample loading pump options for the
AS-HV:
•
A syringe pump (see Section 2.4.1 )
•
A single-piston pump—the AXP Pump (see Section 2.4.2 )
•
An external peristaltic pump—the MASTERFLEX® C/L® Pump System
(see
Section 2.4.3 )
•
An internal peristaltic pump (see Section 2.4.4 )
•
A relay-controlled pump (see Section 2.4.5 )
2.4.1 Syringe Pump
The syringe pump (P/N 064506) contains a stepper-motor driven syringe
and a three-way distribution valve to aspirate and dispense measured
quantities of liquid. A control cable connects the syringe pump to the
AUX and I/O ports on the AS-HV side panel (see Section 2.2 ).
When coupled with the syringe pump, the AS-HV is capable of both
concentrator and loop loading in the push or pull mode (see
Section 2.3 ).
This configuration provides maximum flexibility in terms of Chromeleon
control and flow precision.
To ensure optimal performance when doing concentrator loading with the
syringe 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).
•
Push mode only: Dionex does not recommend using the push mode
with the syringe pump. If you do use the push mode, make sure the
backpressure does not exceed 0.41 MPa (60 psi).
•
Pull mode only: If the Dionex TCC-XLP1 concentrator column is
installed, the maximum flow rate is 0.5 mL/min and the backpressure
should not exceed 0.10 MPa (15 psi).
•
Pull mode only: If the Dionex UTAC-XLP1 concentrator column is
installed, the maximum flow rate is 1.0 mL/min and the backpressure
should not exceed 0.10 MPa (15 psi).