Gas And Humidity Sensors; Column Switching Valve - Thermo Scientific Dionex UltiMate 3000 Series Operating Instructions Manual

UltiMate 3000 Series:
TCC-3000SD and TCC-3000RS Column Compartments

2.7 Gas and Humidity Sensors

A gas sensor and a humidity sensor are installed inside the TCC. The sensors detect any
gas or humidity that may accumulate in the column chamber.
When a certain concentration of gas or humidity is reached inside the TCC (while the door of
the column chamber is closed), the Status LED on the front panel door changes to red and a
message appears on the TCC display and in the Chromeleon Audit Trail. It depends on the
sensor settings whether a beep sounds in addition to alert you (→ page 77).
When a sensor reports excessive gas or humidity, find and eliminate the source for the
leakage (→ page 97).

2.8 Column Switching Valve

A wide range of column switching valves is available from Thermo Fisher Scientific for
the TCC (→ page 17). They allow you to realize most applications in HPLC and UHPLC.
Fig. 4 through Fig. 6 show example flow schematics for the different valve types.
• A 2-position, 6-port valve is the appropriate choice for applications that require two
different columns at frequent intervals at similar temperatures.
Column 1
Fig. 4: Typical example for column switching with a 2-position, 6-port column switching valve
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Injector
Column 2
Detector
Injector
Column 1
Detector
Column 2
Operating Instructions