Dionex Detectors
Dionex AD20/AD25 Absorbance Detectors

In addition to the standard commands available for all detectors (see  Dionex Detectors), Dionex absorbance detectors provide the following commands (please note that the display Filter level determines which commands and properties are displayed):

Special Commands

 

Command

Description

Data_Collection_Rate

Sets the rate at which Chromeleon collects digital data points from the detector.

Rise_Time

Sets how quickly the detector responds to a change in signal.

UV_Cutover

For AD20 only: Sets the wavelength above which the second order filter is inserted in the light path. Typically, the UV cutover wavelength is 380nm.

UV_Lamp

Turns the deuterium lamp to Off, Low, or High (AD20 detector), or Off or On (AD25 detector).

Visible_Lamp

Turns the tungsten lamp to Off, Low, or High (AD20 detector), or Off or On (AD25 detector).

Wavelength

Sets the wavelength.

 

Analog Output Commands

 

Command

Description

Full_Scale

For AD20 only: Sets the full-scale analog out voltage.

Mark

Sends a positive pulse to the detector’s analog output as an event marker.

Offset_Level

Sets the offset for the analog output signal.

Polarity

Switches the analog output polarity (+/-).

Recorder_Calibration

For AD25 only: Allows calibration of the recorder’s response to three detector analog output settings (AU, Zero, Full_Scale)

Recorder_Range

Sets the range of a full-scale recorder response.

 

UV Calibration Commands (For AD25 Only)

 

Command

Description

DownloadCalibration

Downloads the selected set of calibration values to the detector.

DownloadCalibration Parameter

Selects the set of calibration values (Current, Previous, or Factory) to be downloaded.

LeakDet

Performs the leak detector calibration.

WavelengthCal

Performs a wavelength calibration.

WavelengthCalDate

Reports the date of the wavelength calibration.

WavelengthCalResult

Reports the result (pass or fail) of the wavelength calibration.

 

UV Diagnostic Commands (For AD25 Only)

 

Command

Description

LeakDetTest

Performs a test of the leak detector.

LeakDetTestDate

Reports the date of the leak detector test.

LeakDetTestResult

Reports the result (pass or fail) of the leak detector test.

WavelengthVerTest

Performs a wavelength verification via the Holmium Oxide Filter.

WavelengthVerTestDate

Reports the date of the wavelength verification.

WavelengthVerTest Result

Reports the result (pass or fail) of the wavelength verification.