The parameters described in this section should be considered for routine operation of the device. You can usually access them from the Chromeleon user interface.

If a parameter listed below is not available in the Chromeleon software, consider updating the firmware and Chromeleon version.

For more information, refer to Chromeleon Help and documents.

TIP

The Instrument Method Wizard provides different parameter view modes. Depending on the parameters to be set, you can select the desired view mode (for example, Easy or Advanced).

Parameter

Description

Column ID

The column identification (column ID) system allows you to store column-specific information on a column ID tag. For a complete list of column properties and for more information about the column identification system, see Column Identification (Column ID) or refer to the Chromeleon Help.

To activate column identification in Chromeleon, see Installing Column Identification (Column ID).

Column Selection

For a column compartment with one or two column switching valves, column selection is performed in Chromeleon. The number of column switching valves, the valve model, and the application determine which commands and properties are used.

Equilibration Time

Equilibration Time can be set for the column compartment, the post-column cooler (VH-C10 only) and the active pre-heaters (if installed).

For details, see Ready Temp Delta and Equilibration Time or refer to the Chromeleon Help.

Fast Cool

The Fast Cool mode is disabled as a standard. To cool down hot surfaces in the column compartment quickly, turn on the Fast Cool mode in Chromeleon or press the FAST COOL button on the keypad, see Keypad.

To cancel the Fast Cool mode in Chromeleon:

  • Set a new nominal temperature for the post-column cooler, the active pre-heater or the column compartment. The respective component is heated up to the new setpoint temperature. Note that temperature control remains turned off for the components, for which no new nominal temperature is set.

  • Set temperature control to ON for the post-column cooler, the active pre-heater or the column compartment. Note that temperature control remains turned off for the components, for which temperature control is not enabled.

Leak Sensor Settings

The leak sensor is enabled as a standard.

Ready Temp Delta

Ready Temp Delta can be set for the column compartment, the post-column cooler (VH-C10 only) and the active pre-heaters (if installed).

For details, see Ready Temp Delta and Equilibration Time or refer to the Chromeleon Help.

Column Thermostatting

In the Command window, select the column compartment, named CC by default and set TempCtrl to ON, to turn on column thermostatting.

To change the thermostatting temperature, enter a value for the Temperature.Nominal.

Post-Column Cooler Thermostatting (VH‑C10 only)

In the Command window, select the post-column cooler, named PCC by default and set TempCtrl to ON, to turn on post-column cooler thermostatting.

To change the thermostatting temperature for the post-column cooler, enter a value for the Temperature.Nominal.

Active Pre-Heater Thermostatting(if installed)

In the Command window, select the active pre-heaters, named PrehtLeft and PrehtRight by default and set TempCtrl to ON, to turn on active pre-heater thermostatting.

To change the thermostatting temperature for the active pre-heater, enter a value for the Temperature.Nominal.

Thermostatting Modes

The still air mode is selected as a standard.

If required, change the setting and select the forced air mode. For further information about the thermostatting modes, see Operating Principle.

Temperature Signals

In the Instrument Configuration Manager dialog box of the column compartment the temperature check boxes are selected as a standard, when the column compartment is set up in Chromeleon. The Chromeleon software uses this setting to generate the channels for recording the temperature signals.

If a problem occurs, the temperature signals can provide helpful information to identify and eliminate the source for the problem. Therefore, always record the temperature signals.