LumaSense Technologies IS 50-LO plus - Manual (Page 29)

IS 50-LO plus / IGA 50-LO plus Manual Troubleshooting 29
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
Measuring object is smaller than spot size. If needed, exchange optical head.
Choose correct 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
Emissivity set too high
Set lower correct emissivity corresponding to the material
Lens contaminated
Clean lens carefully
Temperature indication too high
Emissivity set too low
Set higher correct emissivity corresponding to the material
The temperature of fiber and optical head is not at least 30 °C lower than the measuring
temperature.
Use cooling jacket with air or water cooling
The measurement is influenced by reflections of hotter machine parts
Try to avoid the influence of the interfering radiation or change measuring position
Measuring errors
Indicated temperature is decreasing during the use of the pyrometer, contamination of
the lens
Clean lens
Air contamination in the sighting path between pyrometer and object
Change position of the pyrometer with a clean sighting path
Strong HF-interferences
Change position of the pyrometer
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 max. temperature is exceeded. Use cooling jacket
Note: The wavelength band of the pyrometers reacts at low measuring temperatures
(below 130 °C) to incandescent lamps or very bright daylight (not valid for fluorescent
tube). For a correct measurement, strong external light to the measured object should
be avoided.