Command/Property

Description

AmbientTemp

Indicates the temperature [°C] outside the optical system.

Analog1_Offset
Analog2_Offset

Use this property to adjust the zero position of the analog output when it is plotted. The value entered is a percentage of the full-scale analog output. The offset allows the evaluation device to plot the signal if it becomes negative.

 Note: 

The output voltage of the analog outputs cannot reach a minimum of exactly 0 V. Therefore, we recommend to set an offset of at least 5 %, even if only positive analog output signals are expected. This will enable you to also measure very small output signals down to 0 precisely.

Analog1_Range
Analog2_Range

Use this property to set the voltage range of the analog output signal. The range to use depends on the evaluation device to which the output is connected.

Analog1_Resolution
Analog2_Resolution

Use this property to set the resolution of the analog output signal. The resolution to use depends on the value expected for the application.

AutoactivateUV_Lamp

Use this property to set the UV lamp. When set to On, the UV lamp is turned on automatically whenever the detector is powered up.

AutoactivateVisible_Lamp

Use this property to set the visible lamp. When set to On, the visible lamp is turned on automatically whenever the detector is powered up.

BaselineBehavior

Use this property to specify the baseline state after a wavelength switch:

• Free: The baseline is not adjusted. Shifts may occur in the baseline position.

• Append: The baseline is reset to the previous signal.

• Zero: The baseline is set to zero.

BuzzerVolume

Use this property to specify the volume of the buzzer.

ClearBaseline

Use this property to delete the most recent baseline scan from memory. See also: Scan, ScanBaseline.

Data_Collection_Rate

Enter the rate [Hz] at which Chromeleon collects digital data from the detector.

DemoFileName

Use this property to enter the file name of the demo file.

ExceptionLogClear

Use this command to clear the error log of the device.

 Note:

An error log is created if the firmware has crashed during an operation. The firmware sends all error log entries to the driver at connect time to be reported in the daily audit trail. You get a warning message about the error and are asked to send the affected audit trail to hardware service for inspection if this happens more often, and to use this command to clear the internal logs.

LamphouseTemp

Indicates the lamp house temperature [°C].

LeakDelay

Use this property to specify the delay of the leak sensor.

LeakSensorMode

Use this property to activate or deactivate leak detection.

• Enabled (default and recommended): Activates leak detection. A beep alerts you when the leak sensor reports a leak.

• Disabled: Deactivates leak detection. The leak sensor status is written to the Audit Trail, but no message appears and no beep sounds.

MuteAlarm

Use this property to mutes the audible alarm. The command has no effect if the alarm state is Off.

PeakWidth

Use this property to set the narrowest peak width at half height.

ResponseTime

Use this property to specify the response time for the signal. The response time is the time required for the detector signal to rise from 10% to 90% in response to a signal increase. A longer response time reduces the noise. However, if the selected response time is too long, this can result in reduced peak heights and asymmetrical peak shapes.

The value calculated by Chromeleon is only a recommended value. You are free to select a different value as appropriate for your application.

 Tip:  

The response time multiplied by the data collection rate must not be smaller than 2 or greater than 20.

Scan

Use this property to record an absorbance spectrum based on the current settings. This requires that a baseline spectrum was recorded with identical parameters (see ScanBaseline).

ScanEndWavelength

Use this property to specify the end wavelength [nm] of the wavelength range for the spectra scan. See also: ScanBaseline, Scan.

ScanSpeed

Use this property to define the speed with which a wavelength range (defined by start wavelength and end wavelength) is scanned. See also: ScanBaseline, Scan.

ScanStartWavelength

Use this property to specify the start wavelength [nm] of the wavelength range for the spectra scan. See also: ScanBaseline, Scan.

SetFactoryDefaults

Use this property to restore the Thermo Scientific standard settings.

Shutter

Use this property to specify whether the shutter blocks the light path.

StopScan

Use this property to stop a running scan of a baseline or absorbance spectrum. See also ScanBaseline, Scan.

UpdateLampIntensity

Use this command to measure and report the lamp intensity of the present lamp.

UV_Lamp

Use this property to indicate the state of the UV lamp. To turn on the deuterium lamp, set UV_Lamp to On.

Visible_Lamp

Use this property to indicate the state of the visible lamp. To turn on the lamp, set Visible_Lamp to On.

WavelengthCalibration

Use this command to perform wavelength calibration.

 Note: 

To ensure that this command is executed correctly in a PGM File, a Wait UV.Ready command is required after this command.

WavelengthValidation

Use this command to perform an internal wavelength validation procedure using the holmium filter.

 Note: 

To ensure that this command is executed correctly, a Wait UV.Ready command is required after this command in the PGM File.

Command/Property

Description

Drift.UpperLimit

Use this property to set the upper drift limit [mAU/h]. Set to 0 to turn drift equilibration off.

StartEquilibration

Use this command start equilibration (noise/drift measurement).

Use this property to set the wavelength for recording the signal on the UV channel to the wavelength with the absorbance maxima for the analytes of interest.

Command/Property

Description

Qualification

Provides information about system qualification.

*.Interval

Use this property to specify the interval (in days) when the next system qualification is due.

*.WarningPeriod

Use this property to specify the period during which a warning appears before the next qualification is due.

*.GracePeriod

Use this property to specify the period during which the detector may be operated after the due date for re-qualification.

QualificationDone

Use this command after qualification to update the related system data.

Service

Provides detector service information.

*.LastDate

Indicates the date of the last service .

*.Interval

Use this property to specify the interval (in days) after which a service is due.

ServiceDone

Use this command after the device has been serviced, select this command to update the related system information.

UVLampOperationTime

Provides information on the UV lamp's operating time.

*.Limit

Use this property to set the limit for the operating time of the UV lamp. An error message appears when the specified value is reached.

*.Warning

Use this property to specify a time limit for issuing a warning with regard to the operation time. A warning appears when the specified value is reached.

VISLampOperationTime

Provides information on the Visible lamp's operating time.

*.Limit

Use this property to set the limit for the operating time of the visible lamp. An error message appears when the specified value is reached.

*.Warning

Use this property to specify a time limit for issuing a warning with regard to the operation time. A warning appears when the specified value is reached.