Troubleshooting

Possible cause
Influence due to extraneous light from the environment
Solution
Shade the object to be measured from extraneous light such as sunlight, lamps or burners.

Possible cause
Dirt, dust or water vapour in the field of view of the pyrometer
Solution
Keep the beam path clear, use an axial air nozzle if necessary.

Possible cause
Field of view of pyrometer constricted
Solution
Adjust / change the location of the pyrometer

Possible cause
Protective window dirty
Solution
Clean / renew protective window

Possible cause
Protective window not suitable for the wavelength of the pyrometer
Solution
Check the protective window type

Possible cause
Lens dirty
Solution
Clean lens with suitable agents

Possible cause
Pyrometer incorrectly focused
Solution
Adjust measuring distance

Possible cause
Transmission of the protective window not corrected
Solution
Set the transmission of the protective window

Possible cause
Emissivity incorrectly determined and adjusted
Solution
Check / set emissivity

Possible cause
Pyrometer misaligned
Solution
Check alignment with suitable means (sighting aid)