QLAST

QLAST

QLAST is a reserved variable name that stores the last amount of charge measured by the potentiostat, either flowing in or out, during the immediately past Electrochemical Energy experiment. QLAST is a REAL data type, and is used only in the Sequence Wizard.

You do not need to define or declare QLAST as a step in your Sequence in order to use it later on in that Sequence.

The next time you run an Electrochemical Energy experiment in that Sequence, QLAST gets overwritten with a new value. Therefore, if you need to use the original value of QLAST, assign another variable to that value of QLAST before it gets overwritten.

Example of QLAST in a Sequence

In the above Sequence Wizard™, the area on the right is a user-defined sequence incorporating the variable QLAST.

This particular example discharges a battery, then charges it. The value of that charge passed through the potentiostat is stored automatically in QLAST, and then assigned to the variable DischargeAmount.

Then the Loop is run to discharge the battery in steps whose value is 20% of the total charge.