What are the length tolerances on fiber optic cables from Avantes?  

Avantes uses the following tolerances on all our cables:

Fiber cables shorter than 1 meter: +/- 5%
Fiber cables in between 1 and 7,5 meter: +/- 5cm
Fiber cables longer than 7,5 meter: +/- 10cm

These tolerances are valid unless otherwise stated  on a technical drawing or in the description of the product.

Can Avantes makes cables with higher tolerances?

Yes, we can make them more accurate.

This requires extra work due to material tolerances and the assembly of the fibers. Higher accuracies can be requested at your sales responsible. Add-on costs will apply for the extra work involved.

I cannot use your Windows DLL or Linux Library, what now?

You can use low-level communication with our spectrometers. We have documentation for the protocol available, including some demos for both RS232 and USB communication, for both Linux and Windows.

How can I save my data periodically?


Click here for a clear visual aid.

 Go to options menu from toolbar.

  1. Please select “Save  Spectra Periodically”
  2. Please select from the option “Save as Fast as Possible”.
  3. Enter the number of scans you need to save.

After your measurements your data has been saved in different Avasoft 8 files.

  1. Go to “File”
  2. Go to “Convert file to”
  3. Select “ASCII”

Select the  files you need to convert to ASCII files.

Now your files have been converted to ASCII files.

Can there be a difference in wavelength in the LED light source and the wavelength measured in Avasoft?

LEDs are made on a substrate, the wavelength depends on the materials and creation process. LEDs which do have a wavelength with smaller tolerances are 100 to 1000 times more expensive because they search for the correct wavelength in a complete batch. When the tolerance is ±5nm the cost price of the LED is reasonable for you as customer.

The catalog say that the optical power from a fiber is 200uW, why do I not measure it with the fiber connected to the spectrometer?

The total output of a fiber can only be measured when the fiber core is smaller than the slit size or coupled into a calibrated irradiance system. The slit of the spectrometer reduces the light that can be coupled into the spectrometer.

What is the lifetime of my bulb in my light source?

The life time of the bulb is the time where at least 50% of the bulbs still working. Some bulbs can work the double of the time and some bulbs break earlier, this also depends on the environmental conditions, in a hot climate the lifetime is shorter than in a cold climate.

How can I reduce the noise in the middle of a merged spectrum?

Click here for a clear visual aid.

  1. Reduce the noise in the middle of a merged spectrum:
  2. When the spectrometers have an overlap of 100nm to 200nm we can adjust the signal  for both spectrometers in the system options. The measurement settings can be changed to the requirements.                  
  3. For example we have an UV/VIS spectrometer up to 1100nm and a NIR spectrometer that begins at 1000nm. We can reduce the noise by set the stop wavelength of the UV/VIS spectrometer to 1075 and set the start wavelength of the NIR spectrometer to 1025 nm.
  4. In that case we use 50nm to merge the signal.
  5. This decreases the noise. By changing the values an optimum can be created .
  6. Then you can go further with merging the channels.

A new wavelength calibration has been performed on my spectrometer, but the coefficients are still in the old settings.


Click here for a clear visual aid

Please follow the procedure described below to activate the new calibration settings.

-          Connect the spectrometer to the computer using the USB2 cable.

-          Start Avasoft.

-          1) Go to “settings”.                        

-          2) Go to “Wavelength Coefficients”.

-          3) Click on “restore factory settings” button.

The new coefficients are now loaded into the EEPROM