5Methodsï€
82 Operation Manual
5 Input the Time.
To set the PTV or COC coolant parameters
Select Method > Inlets. Use the down arrow to scroll until the cryo settings are visible
Cryo Cooling Selecting the checkbox next to Cryo Cooling enables cryogenic cooling of the
inlet at the specified Cryo use temperature setpoint, Deselecting the checkbox disables
cooling.
Fast Cooldown This feature is separate from Cryo Cooling.Fast Cooldown makes the oven
cool faster after a run than it would without assistance. This feature is useful when maximum
sample throughput is necessary, however it does use more coolant. Fast Cooldown turns off
soon after the oven reaches its setpoint and Cryo Cooling takes over, if needed.
Fault Detection Shuts down the inlet temperature if it does not reach setpoint in 16 minutes
of continuous cryo operation. Note that this is the time to reach the setpoint, not the time to
stabilize and become ready at the setpoint
Cryo Use 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 Cryo Use 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 Cryo Use Temperature. If the initial setpoint is above the Cryo Use
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.
If the inlet is to be cooled during a run, cryogen will be used to achieve the setpoint. This may
have a negative impact on the chromatographic performance of the oven and cause distorted
peaks.
Timeout Detection Use this setting to conserve cryogenic fluid. If selected, the instrument
shuts down the inlet and cryogenic (subambient) cooling (if installed) when no run starts in the
number of minutes specified. The setpoint range is 2 to 120 minutes (default 30 minutes).
Turning cryo timeout off disables this feature. We recommend cryo timeout enabling to
conserve coolant at the end of a sequence or if automation fails. A Post Sequence method
could also be used.
To set MMI coolant parameters
Select Method > Inlets. Use the down arrow to scroll until the cryo settings are visible
Cryo Cooling Selecting the checkbox next to Cryo Cooling enables cryogenic cooling of the
inlet at the specified Use cryo temperature setpoint, Deselecting the checkbox disables
cooling.
Fast Cooldown This feature is separate from Cryo. Fast Cooldown makes the oven cool
faster after a run than it would without assistance. This feature is useful when maximum
sample throughput is necessary, however it does use more coolant. Cryo Cooling turns off
soon after the oven reaches its setpoint and Cryo Cooling takes over, if needed.
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