LumaSense IS 12 User Manual

IS 12 / IGA 12 Manual Troubleshooting • 35
8 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 to the object
⇒ New correct alignment to achieve the max. temperature signal
• Incorrect focusing of the optics
⇒ Focus correctly to the measuring distance, if necessary change lens
• Measuring object smaller than spot size
⇒ Change lens and measuring distance
• Measuring object is not always in the measuring spot of the pyrometer (e.g. swinging
wire or pouring stream)
⇒ Use max. value storage or pyrometer with scanning system with max. value storage
• Emissivity set too high
⇒ Set lower correct emissivity corresponding to the material
• Lens contaminated or scratched
⇒ Clean lens carefully or replace it
Temperature indication too high
• Emissivity set too low
⇒ Set lower correct emissivity corresponding to the material
• The measurement is influenced by reflections of hot machine parts
⇒ Use mechanical construction to avoid the influence of the interfering radiation
(sighting tube)
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
• Air contamination in the sighting path between pyrometer and object
⇒ Change position of the pyrometer with a clean sighting path or use a ratio pyrometer
• HF-interferences
⇒ Correct the connection of the cable shield
• Instrument overheated
⇒ Use cooling jacket with air or water cooling
• Temperature Indication is fluctuating, probably caused by changing emissivity
⇒ Wrong pyrometer type, use of ratio pyrometer recommended
Laser targeting light
• Laser targeting light fails
⇒ Instruments temperature above 55 °C. Use cooling jacket.

LumaSense IS 12 Specifications

General

Brand	LumaSense
Model	IS 12
Category	Measuring Instruments
Language	English