Important Notes:
Taking light and dark references should factor out ambient light. However, for the most reliable results, it is ideal to turn off room lighting, and make sure any computer displays are not directly illuminating the sphere.
1. Open the StellarPro program 
.
2. In the side navigation bar, select Haze icon 
3. In Acquire toolbar -> Device Settings, adjust the integration time, number of scans to average, and XTiming resolution control to optimize the device.
4. Take Dark Reference. Be sure sample is removed from holder, and that Total Transmission Cap is secured on the back of the sphere. Turn off
light source and left click on the Dark reference button 
or 
. Note: A dark spectrum is necessary only at the beginning of your measurements for the day or every 30 minutes to ensure accurate results.
5. Take Transmission Reference. With sample still removed and Total Transmission Cap attached, turn on light source. Make sure no sample obstructing the path of light. Then left click on the Transmission Reference button 
.
6. Take Total Transmission. Place sample in sample holder. Make sure the port is properly illuminated and Total Transmission Cap is still attached. Then left click on the Transmission button 
.
7. Take Diffuse Transmission Reference. Remove sample, and attach
Diffuse Transmission Cap (the cap with the small exit port) to the back of the sphere. Then left click on the Diffuse Transmission button 
.
Tip: For best results, make sure that the light eclipses through this port at the beginning of every session. If the light emits a crescent against the lip of the port, manipulate the lens assembly to try and get a better throughput. It helps to remove the clean-up-cap on the front of the sphere to see what you are doing.
8. Take Diffuse Transmission / Calculate Haze. Place sample near or against the front cap in sample holder. Make sure the port is properly illuminated and Diffuse Transmission Cap is still attached. Make sure the light path is normal to the sample. Then left click on the Diffuse Transmission / Calculate Haze button 
.
9. After the 5 measurements are taken, the correct values will be updated on the Data window.
10. Repeat the steps of taking Total Transmission and Diffuse Transmission to measure the haze value for different samples.