Dilution Vessels - Thermo Scientific Dionex Operator's Manual

Standard in (SP1)
Standard or sample in (SP2)
Figure 3-5. 10-Port High-Pressure Valve Connections (SP1 and SP2)
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
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.
Doc. 065250-06 03/2020
3 • SP Sample Preparer Description
POSITION
2
Plug (SP1)
Waste (SP2)
3
4
Plug
5
To waste
(1 and 6)
Valve Functions for
SP1: Load the standard onto the loop
SP2: Load the standard or sample onto the loop
Valve Functions for Position
SP1 and SP2: Pump deionized water through the
loop, delivering the standard (or sample) to the
dilution vessel
1–2 SELECTED
From dilution pump
10
1
To waste
9
8
Plug
7
To dilution vessel
6
Loop
Position 1–2
10–1
Appendix G.
25