User manual LA CROSSE TECHNOLOGY IR-101NL

[. . . ] Temperature display - currently measured value Hold indicator 1 Temperature display - minimum value 2 7 6 5 4 3 3 d. h. Temperature display - maximum value Battery symbol ­ low battery indicator Temperature units ­ °F or °C Operating Button Lens 2. Making a measurement The object being measured should be a minimum of twice the size of the infrared thermometer's lens. The ideal measuring distance is 3 to 12 inches, which will yield a measurement area of ½ inch to 2 inches. As the infrared thermometer is moved away from the object being measured the area being measured increases (6:1 ratio). [. . . ] The principle of measurement requires the ambient temperature to be determined. This takes place at one-minute intervals or each time the unit is switched on. Changes in the ambient temperature, which can occur when the user holds the unit in their hand, are not monitored within this time period and therefore neither of them is taken into account when determining the indicated temperature. A gradual warming of the unit (the lens) between ambient temperature measurements can, for example, lead to the indicated temperature slowly falling. If the emission factor for the object does not correspond to the preset value of 0. 95, the temperature will not be calculated correctly. In general, the darker and more matte the surface is, the larger their emissions factor. If the factor is greater the 0. 95, the temperature indicated will be greater than the actual temperature of the object being measured. If the factor is less then 0. 9, the temperature indicated will be less than the surface temperature. Polished metals have a very low emission factor and are therefore not suitable for measuring with an infrared thermometer. On the other hand, affixing adhesive tape to or painting the surface will increase the emission factor and reduce the inaccuracy of the measurement. It is not possible to take measurements through transparent materials (glass, plexiglas, etc. ). Measurement errors can occur due to air contaminated with dust, steam, smoke, etc. 6. 5 7. TROUBLESHOOTING Problem: Display shows -. Solution: The operating button has not been pressed for long enough. This must be pressed for at least the duration of one measurement, i. e. Problem: Display shows Err 1 Solution: The ambient temperature is outside the permitted range Problem: Display shows 1 Solution: The measured value is outside the permitted range. Changing the batteries If the battery symbol appears in the display, the batteries must be changed. The four button cells are accessible after opening the battery compartment at the rear of the unit. The used batteries must be removed from the battery holders and replaced by new button cells of the same type. Care must be taken to ensure that the polarity is correct when inserting. The batteries must be checked to see that they are properly seated before closing the battery compartment. When cleaning the lens, loose particles must be removed using compressed air. [. . . ] Contact La Crosse Technology immediately upon discovery of any defects covered by this warranty. Before sending the infrared thermometer in for repairs, contact La Crosse Technology. The infrared thermometer will be repaired or replaced with the same or similar model. This warranty does not cover any defects resulting from improper use, unauthorized repairs or faulty batteries. [. . . ]