Lumasense-technologies IGA 320/23-LO Manuel d'utilisateur télécharger pdf (Page 41)

IGA 320/23-LO Operating Manual Troubleshooting  41

10 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 smaller than spot size

 check measuring distance, smallest spot size is at nominal measuring distance

 Measuring object is not always in the measuring spot of the pyrometer

 Use max. value storage (see 4.9)

 Emissivity set too high

 Set lower correct emissivity corresponding to the material (see 4.5)

 Lens contaminated

 Clean lens carefully (see 6.2)

Temperature indication too high

 Emissivity set too low

 Set lower correct emissivity corresponding to the material (see 4.5)

 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 (see 3.3)

 Air contamination in the sighting path between pyrometer and object

 Change position of the pyrometer with a clean sighting path (if necessary use a ratio

pyrometer)

 HF-interferences

 Correct the connection of the cable shield (see 3.1)

 Temperature Indication is fluctuating, probably caused by changing emissivity

 Wrong pyrometer type, use of ratio pyrometer recommended

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Lumasense-technologies IGA 320/23-LO Manuel d'utilisateur Page 41