Technical information

Dionex VP Vacuum Pump Installation
18 Doc. 065186-02 1/12
A. Connections from the Dionex VP to the Dionex CRD
300
The Dionex CRD 300 Carbonate Removal Device consists of a gas-permeable
membrane with a silicone coating that is selective to CO
2
. When the Dionex CRD
300 is running in the vacuum regeneration mode, the Dionex VP evacuates CO
2
from the regenerant channel that encloses the membrane. A bleed line helps
remove gaseous carbon dioxide by bleeding a small amount of air into the
regenerant channel.
Figure 7
shows the typical tubing connections for the vacuum regeneration mode.
NOTE Figure 7 is provided for reference only; refer to the
Dionex CRD 300 manual for current product
information. The manual is included on the Thermo
Scientific Reference Library DVD (P/N 053891).
Figure 7. Example Flow Schematic: Dionex CRD 300 Vacuum Regeneration Mode
Relay Cable
VACUUM
VP Rear Panel
To controlling device
Regen In
Bleed Line
Suppressor
ELUENT OUT
Regen Out
CRD 300
CRD 300
ELUENT
OUT
CRD 300
ELUENT
IN
Conductivity
Cell
CELL IN
CELL OUT
Ballast
Reservoir
0.16-cm (0.062-in) ID
Teflon Tubing (P/N 014157)
0.32-cm (0.125-in) ID
PharMed Tubing (P/N 063267)
RELAY
RELAY
CNTRL
ON
OFF
+
-
EXHAUST
VACUUM
DC IN