Configuration 10
Operation Manual 147
Front Inlet/Back Inlet
See “Unconfigured:” on page 143 and “Ignore Ready =” on
page 142.
To configure the Gas type
The GC needs to know what carrier gas is being used.
1 Press [Config][Front Inlet] or [Config][Back Inlet].
2 Scroll to Gas type and press [Mode/Type].
3 Scroll to the gas you will use. Press [Enter].
This completes carrier gas configuration.
To configure the PTV or COC coolant
Press [Config][Front Inlet] or [Config][Back Inlet]. If the inlet has
not been configured previously, a list of available coolants is
displayed. Scroll to the desired coolant and press [Enter]. If
oven cooling is installed, your choices are restricted to the
coolant used by the oven or None.
Cryo type [Mode/Type] displays a list of available coolants.
Scroll to the desired coolant and press [Enter].
If the Cryo type selection is anything other than None,
several other parameters appear.
Cryo [On/Yes] enables cryogenic cooling of the inlet at the
specified Use cryo temperature setpoint, [Off/No] disables
cooling.
Use cryo temperature This setpoint determines the
temperature at which cryogenic cooling is used continuously.
The inlet uses cryogen to achieve the initial setpoint. If the
initial setpoint is below the Use cryo temperature, cryogen is
used continuously to achieve and maintain the setpoint.
Once the inlet temperature program starts, the cryogen will
be turned off when the inlet exceeds the Use cryo temperature.
If the initial setpoint is above the Use cryo temperature,
cryogen is used to cool the inlet until it reaches the setpoint
and then it is turned off. At the end of a run, the inlet waits
until the oven becomes ready before it uses cryogen.
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