Creating and Modifying Programs
Creating a Shutdown Program

When creating a shutdown program, keep the following guidelines in mind:

• Reduce the flow to ensure that as little solvent as possible is used. However, do not reduce the flow to zero because this may result in crystallization of salts in ion chromatography, for example.

• Therefore, set the lower pressure limit (Pressure.LowerLimit) to 1. This setting ensures that the pressure does not fall below the lower pressure limit when the flow is reduced and the pump is shut down.

• The detector lamp(s) should be turned off.

 Tip: 

Dionex does not recommend performing data acquisition in the shutdown program (i.e., do not use an AcqOn command).

An example program could look as follows:

Pressure.LowerLimit = 1

Pressure.UpperLimit = 350

0.000  Flow = 0.500

0.500  UV_Lamp = Off

Flow = 0.100

End

 Tip: 

A simple way to create a shutdown or standby program is to use the Chromeleon SmartShutdown Wizard.

For an overview of how to create a shutdown or standby program using the SmartShutdown Wizard, refer to  Shutting Down the Chromatography System (SmartShutdown).

Also, refer to:

 Specifying an Emergency Program

 Creating a Power Failure Program