GAS BreathSpec, User Manual

Page: 36 / 242

BreathSpec®
– User Manual
36/242
Figure 7: Six-Port Valve - Position Fill Loop and Inject
The sample is transferred via the heated 6-port-valve (T3) to the GC-Column. In the
default position of the 6-port-valve the carrier gas permanently flushes the multi
capillary column. The sample gas is pumped through the loop by the pump
P . This
phase is called “Fill Loop”. In this position the sample gas from the Sample In socket
is directly routed to the Sample Out socket.
For routing the sample gas in the loop to the GC-Column and to the IMS, the 6-port-
valve is switched to the second position. The carrier gas now transports the sample
gas into the loop and further to the GC-Column, where the substances in the sample
gas are separated by time. The eluting substances are introduced into the ionization
region of the IMS and leave the system via the Gas Out socket.
The carrier gas stream now transports the sample gas to the multi GC-column, where
the substances in the sample gas are separated by time. The eluting substances are
introduced into the ionization region of the IMS and leave the system via the Gas Out
socket.
INFORMATION!
In the event of a power failure, check the position of the valve
position. The basic setting must be set to
Fill Loop
.