LumaSense Technologies IS 320 - Manual (Page 25)

IS 320 • IGA 320 Manual Troubleshooting 25
7 Troubleshooting
Before sending the pyrometer for repair, it is recommended that you try to find the error and to
solve the problem with the help of the following list.
Temperature indication too low
Incorrect alignment of the pyrometer with the object
realign to achieve the maximum temperature signal
Measuring object smaller than spot size
check the measuring distance, the smallest spot size is at nominal measuring distance
Measuring object is not always in the measuring spot of the pyrometer
Use maximum value storage
Emissivity set too high
Enter a higher emissivity value suitable for the material
Lens contaminated
Clean lens carefully
Temperature indication too high
Emissivity set too low
Enter a lower emissivity value suitable for the material
The measurement is influenced by reflections of hot machine parts
Use mechanical construction to avoid the influence of the interfering radiation
Measuring errors
Indicated temperature is decreasing during the use of the pyrometer due to contamination
of the lens
Clean the lens. Recommendation: use of an air purge
Air contamination in the sighting path between pyrometer and object
Change position of the pyrometer to a clean sighting path (if necessary use a ratio
pyrometer)
HF-interference
Correct the connection of the cable shield
Temperature indication is fluctuating, probably due to changing emissivity
Wrong pyrometer type, use of ratio pyrometer recommended