VICI TCD2 - Manual (Page 14)

10
Gas Connections
Remember these three points discussed earlier: (1) all surfaces that contact
the gas stream must be glass or stainless steel; (2) do not use copper tubing
or brass fittings; and (3) all tubes must be thoroughly cleaned and baked
before use. The installation instructions below assume that the detector
carrier will be supplied from a nearby cylinder. If your installation is different,
you may need to modify the instructions appropriately. Consult the VICI
catalog or vici.com for any fittings and tubing required.
The figures below illustrates gas connections for a typical TCD2 detector
system, in referenced and unreferenced modes. Since the distance from the
carrier supply to the GC varies from installation to installation, we do not
supply tubing to go from that point to the GC.
Installation
GAS CHROMATOGRAPH
COLUMN INJECTOR
TEE
(ZT1)
PURIFIER
CARRIER GAS
(99.999% purity)
FLOW
CONTROLLERS
DETECTOR
CHANNEL A
INLET
(gold ferrule)
CHANNEL B
INLET
(stainless ferrule)
CHANNEL
A
VENT
CHANNEL
B
VENT
Figure 7: Referenced mode (A - B)
Figure 8: Unreferenced mode
GAS CHROMATOGRAPH
COLUMN INJECTOR
TEE
(ZT1)
PURIFIER
CARRIER GAS
(99.999% purity)
FLOW
CONTROLLERS
DETECTOR
CHANNEL A
INLET
(gold ferrule)
CHANNEL B
INLET
(stainless ferrule)
CHANNEL
A
VENT
CHANNEL
B
VENT
COLUMN INJECTOR