Thermo Scientific Dionex, Руководство оператора

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3 • SP Sample Preparer Description
Doc. 065250-06 03/2020
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3.5.2 Dilution Vessels
A dilution vessel is used to prepare calibration standards in an SP1 and
SP2, and also to dilute samples in an SP2. Two types of dilution vessel are
available:
•
An unheated dilution vessel (P/N 069208) with a capacity of 250 mL
is standard for both the SP1 and SP2.
•
A heated dilution vessel (P/N 068524) with a capacity of 50 mL is
available as an option. For installation instructions, see
Appendix G .
Pressurize either dilution vessel with high-purity nitrogen or helium
(filtered, dry, and oil-free) regulated to 170 to 240 kPa (25 to 35 psi). If
the pressure reaches 340 kPa (50 psi), a pressure relief valve opens.
Dilution Vessel Mixer
Both dilution vessels are equipped with a mixer and a PTFE
(polytetrafluoroethylene) stir bar. Specify the default mixer speed (from
0% to 100% of maximum) in the Chromeleon 7 Instrument Configuration
Manager on the
Pumps/Motors page.
Figure 3-5. 10-Port High-Pressure Valve Connections (SP1 and SP2)
POSITION SELECTED 1–2
Standard in (SP1)
Standard or sample in (SP2)
Plug (SP1)
Waste (SP2)
Plug
To waste To dilution vessel
Plug
From dilution pump
To waste
Loop
(1 and 6)
1
3
5
7
9
2
4
6
8
10
Valve Functions for
Valve Functions for Position
Position 1–2
10–1
SP1: Load the standard onto the loop
SP2: Load the standard or sample onto the loop
SP1 and SP2: Pump deionized water through the
loop, delivering the standard (or sample) to the
dilution vessel