33
b) Batteries and rechargeable Batteries
Remove the batteries/rechargeable battery if you are not using the device for an extended period of time to prevent
damage to the device by leakage. Leaking or damaged batteries/rechargeable batteries may cause acid burns in
case of skin contact. Therefore, use suitable protective gloves to handle damaged batteries/rechargeable batteries.
Always keep batteries/rechargeable batteries out of the reach of children. Never let batteries/rechargeable batteries
lie around freely. They may be swallowed by children or pets.
Do not disassemble any batteries/rechargeable batteries, do not short-circuit them and do not throw them into fire.
Never try to charge batteries. Danger of explosion.
7. ProDUCt DESCrIPtIoN
a) function
Infrared thermometers (IR-thermometers) measure the surface temperature of an object. The product sensor
records the emitted, reflected and passed-through heat radiation of the object and converts this information into a
temperature value.
The degree of emission is a value used to describe the energy emission characteristic of a material. The higher
this value, the higher the material‘s ability to emit radiation. Many organic materials and surfaces have an emission
degree of approx. 0.95. Metal surfaces or glossy materials have a lower degree of emission. This will cause an inac-
curate measurement. For this reason, a matte-black coat of paint or matte adhesive tape should be applied.
b) Ir-measuring optics - ratio measurement distance-measuring area
(D:S = measuring distance:measuring area)
To achieve precise measuring results, the measured object must be larger than the IR measuring spot of the infra-
red thermometer. The determined temperature is the average temperature of the measured surface. The smaller the
measured object, the shorter the distance to the infrared thermometer has to be. The precise measuring spot size
can be taken from the following chart. It is also printed on the device. For precise measurements, the measuring
object should be at least twice as large as the measuring spot.
The smallest measuring diameter is reached before the measuring opening at a distance of up to 90 cm. It is 18 mm
in diameter. Keep sufficient distance to avoid incorrect measurement due to heating of the IR thermometer. Then the
measuring cone expands as shown in the sketch.
Example: The measuring diameter at a distance of 2 m is 40 mm.
