Thermo Scientific Accela/Surveyor Plus PDA/TSP UV6000 PDA Detectors

Commands and Tips for Thermo Scientific Devices
Thermo Scientifc Accela/Surveyor Plus and TSP UV6000 PDA Detectors

The following commands and properties are available (please note that the display Filter level determines which commands and properties are displayed);

In the tables below, XY can be either UV (deuterium lamp l = 190 - 340 nm) or Visible (tungsten lamp: (l = 340 - 800 nm):

Command/Property	Min	Max	Default	Description
Data_Collection_Rate (For more information, refer to Data Collection Rate in the Glossary section.)	0.5 Hz	20.0 Hz, 40.0 Hz/ 80.0 Hz (Accela PDA)	1.0 Hz Read from the device on connect	Sets the data collection rate for the channels and the 3D field.
FirmwareVersion	Text string (max.32 characters) Read from the device on connect			Indicates the module's firmware version (read-only).
Rise_Time	0.0 s	10.0 s	2.0 s Read from the device on connect	Sets the response time after a signal has been changed.
XY_Lamp	Off	On	N/A	Turns the tungsten/deuterium lamp on and off.
XY_LampAge	0 h	9999 h	Periodically read from the device.	Indicates the time the tungsten/deuterium lamp has been on since its installation.
XY_LampReplacedAt	Date string (periodically read from the device)			Indicates the time when the tungsten/deuterium lamp has been installed.

Tip:

When the Data Collection Rate command is executed, the Step value is automatically set to the reciprocal value. If you want to use a different step (usually, this is not required), you must issue the Step command after the Data Collection Rate command .

Command	Description
Autozero	Sets the detector signal to 0.
Connect	Connects the PDA detector to Chromeleon.
Disconnect	Disconnects the PDA detector from Chromeleon.
Reset	Resets the PDA detector to the default values.
XY_LampReset	Resets the XY_LampReplacedAt counter to now.

Commands and Properties of UV Channels

Property	Min	Max	Default	Description
Average	Off	On	Off	Allows signal averaging.
Bandwidth	1 nm	121 nm	1 nm Read from the device on connect.	Indicates the bandwidth for the channel (odd values only).
MaxAutoStep	0.01 s	5.10 s	5.10 s	Indicates the maximum step for Step = Auto
Step	Auto, 0.01 s	5.10 s	Auto	Indicates the time interval between the recorded data points.
Wavelength	190 nm	800 nm	254 nm	Indicates the wavelength at which the detector measures the signal.

Tip:

After a Reset command, it takes 90 s until the detector is ready to execute another command.

Commands and Properties of the 3D Field

Property	Min	Max	Default	Description
Bandwidth	1	121	1nm (Read from the device on connect.)	Indicates the bandwidth for all wavelengths in the spectrum² (odd values only) Caution: If firmware version ROM 02, RAM 1.8 is installed, setting the bandwidth to a value >1 nm may result in a fatal device error.
BunchWidth	1 2 4 5 10		1 nm (Read from the device on connect.)	Indicates the distance between the wavelengths in the spectrum².
MaxWavelength	190	800	800 nm	Indicates the upper limit of the measuring range.
MinWavelength	190	800	190 nm	Indicates the lower limit of the measuring range.
Step	0.0125 (Accela 80 Hz PDA) 0.0250 (Accela 80 Hz PDA) 0.05 0.10 0.20 0.25 0.50 1.00 2.00		1.00 s (Read from the device on connect.)	Indicates the time interval between recorded spectra in [s].

Tip:

² For example, to scan the wavelengths between 400 nm and 500 nm with a BunchWidth of 10 mm, you can select the following bandwidths, e.g., 11 nm or 5 nm.

a) 11 nm

Select a bandwidth of 11 nm to scan the following wavelength ranges:

395-405, 405-415, 415-425, 425-435, 435-445, 445-455, 455-465, 465-475, 475-485, 485-495, and 495-505 nm.

b) 5 nm

Select a bandwidth of 5 nm to scan the following wavelength ranges:

398-402, 408-412, 418-422, 428-432, 438-442, 448-452, 458-462, 468-472, 478-482, 488-492, and 498-502 nm.

In this case, the wavelength ranges 403-407, 413-417, 423-427 nm etc. are not scanned.

Commands and Properties for Accela 80 Hz PDA Calibration

The following commands and properties are provided for adjusting the light throughput, performing dark current calibration, and performing wavelength calibration for the Accela 80 Hz PDA detector. For details, also refer to Adjusting the Light Throughput and Calibrating the Detector.

Note:

Support of the Accela 80 Hz PDA is available starting with the SR11 Driver Update that provides extended Accela system support.

Light Throughput Adjustment:

Command/Property	Description
ChannelA/B/CLevel	(Read-only) Indicates the intensity level of diodes A, B, and C (see StartLightThroughputAdjustment)
StartLightThroughputAdjustment	Starts data transmission for adjusting the light throughput attenuators. The DiodeA, DiodeB, and DiodeC parameters allow you to select the diode that you want the detector to monitor. The default is 40, 55, and 450.
StopLightThroughputAdjustment	Stops data transmission for adjusting the light throughput attenuators.
TakeIntensityScan	Saves an intensity scan to the spectra library. The spectra library is saved in the Manual sequence of the timebase. The scan can then be viewed on a panel or in the spectra library view.

Dark Current Calibration:

Command/Property	Description
ApplyCurrentDarkCurrentCalibration	Stores the results of the most recent dark current calibration as current calibration values.
ApplyDefaultDarkCurrentCalibration	Resets dark current calibration settings to factory defaults and reset the calibration status to NotValid.
CancelDarkCurrentCalibration	Cancels a running dark current calibration procedure.
DarkCurrentCalibrationStatus	(Read-only) Indicates if the status of the most recent dark current calibration (Valid or NotValid).
LastDarkCurrentCalibrationDate	(Read-only) Indicates the date of the most recent dark current calibration.
StartDarkCurrentCalibration	Starts a new dark current calibration procedure.

Wavelength Calibration:

Command/Property	Description
ApplyCurrentWavelengthCalibration	Stores the results of the most recent wavelength calibration as current calibration values.
ApplyDefaultWavelengthCalibration	Resets wavelength calibration settings to factory defaults and reset the calibration status to NotValid.
CancelWavelengthCalibration	Cancels a running wavelength calibration procedure.
LastWavelengthCalibrationDate	(Read-only) Indicates the date of the most recent wavelength calibration.
StartWavelengthCalibration	Starts a new wavelength calibration procedure. The PeakSet parameter allows you to specify which peak set is used for wavelength calibration.
WavelengthCalibrationStatus	(Read-only) Indicates if the status of the most recent wavelength calibration (Valid or NotValid).

Note:

Accela 80 Hz PDA detector: The detector requires some time to load the firmware and boot before it can be connected. During this time, the Chromeleon Server PC must be running. If necessary, define a Server startup connect delay time for the Chromeleon Server in the Server Configuration (Advanced tab) to prevent the Server from failing to connect.