Apr-09
85
Avantes
www.avantes.com
4.3
AvaLight-HAL-CAL Calibrated Tungsten Halogen light source
Parts Included
1.
AvaLight-HAL-CAL Calibrated Tungsten Halogen light source
2.
CC-UV/VIS cosine corrector, mounted in the AvaLight-HAL-CAL
3.
Printed Calibration sheet in µW/cm²nm
4.
CD/Diskette with Calibrated output as *.lmp file, to be read in directly by AvaSoft-IRRAD
5.
Calibrated PS-24V/1.25A power supply.
Starting up
1.
Plug in the power supply.
2.
Plug in the connector of the power supply into the socket of AvaLight-HAL-CAL.
3.
Connect the SMA-connector of your fiber to the SMA-plug of the CC-UV/VIS
4.
Switch on the Halogen lamp with the frontside switch.
Changing of the bulb
Since the light source is calibrated, the bulb exchange and recalibration can only be done in our
calibration lab.
N.B. The AvaLight-HAL-CAL cannot be used as a light source for standard reflection/absorption
spectroscopy.
How to take absolute irradiance measurements with AvaSoft 7 full
1.
Start the AvaSoft 7 software, and click the Start button in the main window.
2.
Connect a fiber to the Spectrometer input port.
3.
Start the Absolute Irradiance Application software by clicking the menu option:
Application/Absolute Irradiance. Click the “Perform Intensity Calibration” button.
4.
Select the spectrometer channel that will be calibrated, the calibration lamp file and enter the
diameter of the fiber/cosine corrector or integrating sphere sample port that is used.
5.
Turn on the reference light source (e.g. AvaLight-HAL-CAL or AvaLight-HAL-CAL-ISP). If a cosine
corrector is used at the end of the fiber, mount it directly on the reference light source. If an
integrating sphere is used at the end of the fiber, put the integrating sphere sample port over
the light output port.
6.
Verify that the calibration lamp is ON for at least 15 minutes, and click the “Start Intensity
Calibration” button. Try to adjust the integration time while looking at the reference light, such
that the maximum count over the wavelength range is around 14000 counts. It‟s also possible to
let AvaSoft search for an optimal integration time by clicking the „ AC‟ button.
7.
Adjust the Smoothing Parameter to optimize smoothing for the Fiber/Slit diameter that is used.
8.
If a good reference signal is displayed, click the white “Save Reference” button. A white line
will mark the reference spectrum. Then switch off the calibration lamp, wait until the spectrum
becomes flat, near the bottom of the scale, and click the black button to save a dark spectrum.
A black line will mark the dark spectrum.
9.
Click the “Save Calibration” button. A dialog shows up in which the current settings in this
intensity calibration are shown. If the calibration has been performed with diffuser, the
intensity calibration data will be saved to an ASCII file with extension *.dfr, with bare fiber this
