Measuring; Ir Measuring Spot Size - Ratio Measuring Distance:measuring Surface - VOLTCRAFT IR 2201-50D USB Notice D'emploi

• Emissivity is used to describe the energy emission characteristics of a material. The higher the emissivity, the more
radiation a material can emit. Many organic materials and surfaces have an emission level of approx. 0.95. Metallic
surfaces or shiny materials have low emissivity. This results in imprecise measuring values. For this reason, the
emission level can be set.
b) Measuring
• Point the measuring hole, preferably at a 90° angle, at the object to be measured. Make sure the object to be
measured is not smaller than the IR measuring spot of the device.
• Press and hold the measuring button. The measuring value is indicated on the display. The displayed measurement
value corresponds to the average surface temperature of the IR measuring spot. During measurement, the SCAN
indicator is shown on the display.
• After releasing the measuring button, the last measured value will be displayed for approx. 7 seconds for improved
readability. The HOLD indicator also appears.
• 7 seconds after releasing the measuring button, the device turns off automatically.
• Horizontal bars appear on the display if the temperature range is exceeded.
To determine the hottest spot on the measured object you have to scan the object, with the measuring
button held down, in a zigzag motion until you find the hottest spot. When the MAX temperature function is
active, the highest measured temperature appears at the top of the display during measurement.
In order to obtain exact measured values, the infrared thermometer has to be adjusted to the ambient
temperature. Allow the device to adjust to the ambient temperature after relocation.
Shiny surfaces affect the measured result. To compensate, the shiny part of the surface can be covered
with adhesive tape or matt black paint. The device cannot measure through transparent surfaces such as
e.g. glass. Instead, it measures the surface temperature of the glass.
Prolonged measurement of high temperatures at near measuring distances leads to self-heating of the
measuring device and thus to inaccurate measurements. In order to obtain exact measured values,
remember the following rule of thumb: The higher the temperature, the greater the measuring distance and
the shorter the measuring time.
c) IR measuring spot size - Ratio measuring distance:measuring surface
• In order to obtain precise measuring results, the measured object must be larger than the IR measuring spot. The
measured temperature is calculated using the average temperature of the measured area. The smaller the object,
the closer it must be to the thermometer.
• The exact size of the measuring spot is shown in the following diagram. It is also indicated on the thermometer.
To ensure precise measurements, the measured object should be at least twice the size of the measuring spot.
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