2
– Installation
Thermo Scientific
Product Manual for Dionex Anion Chemically Regenerated
Suppressor for ICE
Page 11 of 22
032661-12
2.3
Back Pressure Coils for the Dionex ACRS-ICE 500
All detector cells require enough back pressure to prevent eluent in the cell from degassing due
to abrupt volume changes between the small inner diameter of the connecting tube and the
relatively larger volume of the cell. Degassing creates bubbles in the cell and disrupts detector
responsiveness. Back pressure coils help to prevent gases coming out of solution and forming
bubbles in the detector cell.
Back pressure coil components are located in the detector ShipKit's Back Pressure Coils Kit,
P/N 045825. For 9 mm systems, locate assembly P/N 045877. Alternatively, lengths and
diameters of tubing necessary for proper back pressure are given in Table 1, “Coils for Dionex
ACRS-ICE 500 Back Pressure Requirements.”
2.3.1
Assembly
A.
Slip PEEK liquid line bolts and ferrules onto the ends of the tubing. Refer to Table 1,
“Coils for Dionex ACRS-ICE 500 Back Pressure Requirements,” and determine the
correct number of coils required for your application based on the eluent flow rate.
B.
After assembly of the coils, place the completed coils and couplers between the
conductivity cell and the waste container.
Table 1
Coils for Dionex ACRS-ICE 500 Back Pressure Requirements
Dionex ACRS-
ICE 500 Type
Flow Rate
i.d. of
Tubing
Length of
Each Coil
Number
of Coils
4 mm
0.25 – 0.75 mL/min 0.005” (Red)
12 in.
1
9 mm
0.75 – 1.5 mL/min 0.010” (Black)
30 in.
2
9 mm
1.5 – 3.0 mL/min
0.010” (Black)
30 in.
1
The correct amount of back pressure for optimum operation is 40–50 psi. Back pressure
over 450 psi after the Dionex ACRS-ICE 500 can cause irreversible damage!
CAUTION
!
