Troubleshooting
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Assembly PT 135
Error category
Temperature measurement
Problem
Measured temperature too low or too high
Temperature measurement
Problem
Measured temperature too low or too high
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.
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
Field of view of pyrometer constricted
Solution
Adjust / change the location of the pyrometer
Possible cause
Protective window dirty
Solution
Clean / renew protective window
Protective window dirty
Solution
Clean / renew protective window
Possible cause
Lens dirty
Solution
Clean lens with suitable agents
Lens dirty
Solution
Clean lens with suitable agents
Possible cause
Pyrometer incorrectly focused
Solution
Adjust measuring distance
Pyrometer incorrectly focused
Solution
Adjust measuring distance
Possible cause
Emissivity incorrectly determined and adjusted
Solution
Check / set emissivity
Emissivity incorrectly determined and adjusted
Solution
Check / set emissivity
Possible cause
Pyrometer misaligned
Solution
Check alignment with suitable means (sighting aid)
Pyrometer misaligned
Solution
Check alignment with suitable means (sighting aid)