LumaSense Technologies IN 300/5 - Handbuch (Seite 21)

IMPAC pyrometers IN 300 · IN 300/5
21
9 Trouble shooting
Before sending the pyrometer for repair, 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 to the object
 New correct alignment to achieve the max. temperature signal
 Measuring object smaller than spot size
 check measuring distance, smallest spot size is at nominal measuring distance (see 5)
 Emissivity set too high
 Set lower correct emissivity corresponding to the material (see 6)
 Lens contaminated
 Clean lens carefully (see 8.2)
Temperature indication too high
 Emissivity set too low
 Set lower correct emissivity corresponding to the material (see 6)
 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, contamination of the lens
 Clean lens. Recommendation: use of air purge
 Indicated temperature is decreasing during the use of the pyrometer, although the air purge
unit is used. Probably compressed air is not clean or air failed
 Clean the lens and use clean, dry and oil free compressed air
 HF-interferences
 Correct the connection of the cable shield (see 4)
 Instrument overheated
 Use cooling jacket with air or water cooling