PDA/PDA/PDA-100/PDA-3000 Photodiode Array Detectors

Dionex Detectors
Dionex PDA/PDA-100/PDA-3000 Photodiode Array Detectors

In addition to the standard commands available for all detectors (see Dionex Detectors), the PDA, PDA-100, and PDA-3000 detectors provide several additional control commands (please note that the display Filter level determines which commands are displayed).

UV_VIS Channel Commands

Command	Description
Bandwidth	Sets the bandwidth (the wavelength range at which the chromatogram is measured).
Offset_Level	Sets the offset for the analog output signal.
Recorder_Range	Sets the range of a full-scale recorder response (analog output).
RefBandwidth	Sets the bandwidth of the reference wavelength (if one is selected). If RefWavelength is Off, the RefBandwidth setting has no effect.
RefWavelength	Sets the reference wavelength.

3DFIELD Channel Commands

Command	Description
BunchWidth	Determines how many wavelengths are averaged when collecting 3D data. Bunching (averaging) the signals of adjacent wavelengths will reduce the amount of 3D data stored.
MaxWavelength	Sets the maximum wavelength of the 3D field.
MinWavelength	Sets the minimum wavelength of the 3D field.
RefBandwidth	Sets the bandwidth of the reference wavelength (if one is selected). If RefWavelength is Off, the RefBandwidth setting has no effect.
RefWavelength	Sets the reference bandwidth.

Other Special Detector Commands

Command	Description
AmbientTemp	Reports the temperature outside the optical assembly.
AZ_Done	Reports the status of an autozero command (Busy or Done).
Data_Collection_Rate	Sets the rate at which Chromeleon collects digital data points from the detector.
NegativeAbsorptionLevel	Sets the amount of increased light transmission from autozero (negative absorption) to which the detector responds. This permits peaks to be seen even when the eluent decreases absorbance.
OpticalBenchTemp	Reports the temperature of the optical bench.
Rise_Time	Sets how quickly the detector responds to a change in signal.
TTL_Input_Mode	Sets the TTL input signal mode.
UV_Lamp	Turns the deuterium lamp on and off.
UVLampPowerOnSetting	Selects whether the deuterium lamp is turned on when the detector power is turned on. The default setting is On.
Visible_Lamp	Turns the tungsten lamp on and off.
VisLampPowerOnSetting	Selects whether the tungsten lamp is turned on when the detector power is turned on. The default setting is On.

UV Calibration Commands

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.
FilterWheel	Calibrates the filter wheel (PDA-100 (DX-LAN) only).
Intensity	Calibrates the intensity of the deuterium lamp.
LeakDet	Performs the leak detector calibration (PDA-100 (DX-LAN) only).
WavelengthCal	Performs a wavelength calibration.
WavelenthCalDate	Reports the date of the wavelength calibration.
WavelenthCalResult	Reports the result (pass or fail) of the wavelength calibration.

UV Diagnostic Commands

Command	Description
LeakDetTest	Performs a test of the leak detector (PDA-100 (DX-LAN) only).
LeakDetTestDate	Reports the date of the leak detector test.
LeakDetTestResult	Reports the result (pass or fail) of the leak detector test.
WavelengthVerTest	Performs wavelength verification via the Holmium Oxide Filter.
WavelengthVerTestDate	Reports the date of the wavelength verification.
WavelengthVerTestResult	Reports the result (pass or fail) of the wavelength verification.

System Wellness and Predictive Performance commands and properties

Tip:

The Chromeleon version and the detector type determine which commands and properties are available for checking the detector wellness and performance.

Command/Property	Description
LampIntensity	Reports the deuterium lamp's intensity at 254 nm in counts/second.
ModuleAge	Reports (or resets) the number of hours the detector has been on.
Qualification	Provides information about detector qualification.
*.LastDate	Reports when qualification was last performed (read-only).
*.LastOperator	Reports the name of the user who performed the last qualification (read-only).
*.Interval	Specifies the period of time (in days) between qualifications.
*.WarningPeriod	Specifies the number of days before qualification expiration that Chromeleon will display a reminder that requalification will be necessary.
*.GracePeriod	Indicates for how many more days the user can continue to operate the detector after failing to perform a scheduled qualification.
QualificationDone	Selecting this command after qualification sets .LastDate to the current date and sets .LastOperator to the name of the currently logged in user.
UVLampAge	Reports (or resets) the number of hours the deuterium lamp has been on.
VisLampAge	Reports (or resets) the number of hours the tungsten lamp has been on.
VisLampIntensity	Reports the tungsten lamp's intensity at 520 nm. Reported in counts per second.

The Administrator Help section provides information about how to install the PDA, PDA-100, or PDA-3000 detector; refer to Hardware Installation:

ICS-Series Photodiode Array Detector: Overview

PDA-100 (DX-LAN) Detector: Overview

Photodiode Array Detector (PDA-100 (USB)/PDA-3000): Installation.