Instrument Type:

System Command, all detectors

Related Commands:

Inject

Description:

The AcqOn/Off command enables or disables data recording (Raw Data) for the selected Signal (= channel) of a timebase. Each signal (or channel) is stored in a separate file. Signal parameters define the type of data from each signal.

Function:

To reduce raw data storage requirements, issue the AcqOn command some time after the Inject command. However, be sure to issue the command at least 30 seconds before the elution of the first peak. The reason is that Chromeleon requires a baseline segment of several seconds in order to perform a noise analysis for the auto-optimized step control functions (Step, Sampling Rate, or Data Collection Rate).

You can issue the command either manually using the AcqOn/Off command or automatically via the Program.

Trigger commands whose conditions depend on signal values or their slope are effective during data acquisition only.

 Tip:

You can change the parameters that are defined in the program, such as Step and Average at any time. For clarity, however, Dionex recommends observing the following command sequence:

-2.000 Flow = 1.000

... ...

0.000 Inject

0.500 UV_VIS_1.AcqOn

... ...

3.270 UV_VIS_1.Wavelength = 275

... ...

12.000 UV_VIS_1.AcqOff

13.500 End

Do not change the 3DFIELD signal parameters between AcqOn and AcqOff.

Use the Hold and StopFlow commands to interrupt data acquisition. Use the Continue command to resume acquisition. To complete raw data acquisition, select the AcqOff command.