| Symptôme | Problème | action |
| OL (on display) | Target temperature out of range | Select a target within the metric range |
| -OL(on display) | Target temperature below range | Select a target within the metric range |
| batterie faible | Batterie de rechange. | |
| Display is blank | possible battery drain | Check and/or replace battery. |
| Laser ne fonctionne pas | 1. Low battery or dead battery | 1. Replace the battery. |
| 2. The ambient temperature is higher than 40 degree (104 degree F) | 2. Suitable for areas with low ambient temperature | |
| sonnerie longue | Is there a function to set High/Low, | Reset or cancel limit settings. |
| et la valeur mesurée a dépassé la limite |
Pls Clink Below Photo and Read more details about this infrared thermometer ST490
infrared thermometer ST490 Lien produit :
