9 troubleshooting – LumaSense Technologies IN 6/78-L User Manual
Page 35
IN 6/78-L Operating Manual
Troubleshooting · 35
9 Troubleshooting
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 with the object
Þ Realign to achieve the maximum temperature signal(see
)
·
Measuring object smaller than spot size
Þ check measuring distance, smallest spot size is at nominal measuring distance (see
)
·
Measuring object is not always in the measuring spot of the pyrometer
Þ Use maximum value storage (see
·
Emissivity set too high
Þ Set lower correct emissivity corresponding to the material (see
·
Lens contaminated
Þ Clean lens carefully (see
)
Temperature indication too high
·
Emissivity set too low
Þ Set lower correct emissivity corresponding to the material (see
·
The measurement is influenced by reflections of hot machine parts
Þ 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
Þ Clean lens. Recommendation: use of air purge (see
)
·
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
Þ Clean the lens and use clean, dry and oil free compressed air
·
Air contamination in the sighting path between pyrometer and object
Þ Change position of the pyrometer with a clean sighting path (if necessary use a ratio
pyrometer)
·
RF-interferences
Þ Correct the connection of the cable shield (see
)
·
Instrument overheated
Þ Use cooling jacket with air or water cooling (see
)
·
Temperature Indication is fluctuating, probably caused by changing emissivity
Þ Wrong pyrometer type, use of ratio pyrometer recommended