How to delay a method

Introduction

A method can be programmed to be delayed at critical points. There are three instructions for this purpose: Hold, Pause and Hold_Until. These instructions are described below.

Hold

The Hold instruction suspends the execution of the method, but continues to pump eluent at the current flow rate and concentration settings. For example, this instruction is useful for giving the operator time to load a sample loop.

Resume the method

The method may be resumed if you click Continue on the System Control toolbar.

Pause

The Pause instruction suspends execution of the method and stops the pumps so that the system comes to a standstill. In ÄKTAdesign systems valves remain in the position they were in before the pause. The pause may be defined as indefinite or for a given number of minutes. This instruction is most useful for stopping the system in the event of an unexpected condition.

Resume the method

The method may be resumed if you click Continue on the System Control toolbar.

Hold_Until

The Hold_Until instruction is a special kind of Watch instruction. The method is put on hold until a specific condition is met (signal, test or value) or the time-out is reached. Thereafter the remaining instructions in the method are executed.

Instructions that share the same breakpoint as the Hold_Until instruction, but are placed after it in the method, will be executed after the Hold_Until conditions have been met.

2005-06-15