6
4. How to Measure
(1) Remove the lens cap.
(2) Prior to measurement, set the laser marker and emissivity.
(3) Direct the thermometer at an object and pull the trigger. Then, the measured temperature is
displayed on the LCD.
NB.: Infrared rays in this measurement wavelength range do not penetrate glasses. When
measuring the object through the glass, it detects the surface temperature of the glass.
(4) Release the trigger. The measured value can be held for approximately six seconds after the
trigger is released.
* Keep pulling the trigger to continuously measure temperature every one second.
(5) After six seconds, the power is automatically turned off (auto power-off function).
* Auto-power function cannot be released.
(6) After the measurement, put the lens cap on the measurement window
4-1. Measurement Spot Siz
e
The measurement spot size of this thermometer changes in accordance with the distance as
shown below.
The diameter of the measuring spot shown above is defined on the basis of the area that receives
90% or more of the energy. The D:S ratio, which is the ratio of the distance between the object and
the thermometer to the size of the spot, is preset at 10:1 (D = measuring distance, S = diameter of
spot). For example, for the distance of 200 mm, a spot circle of diameter 20 mm can be measured.
If the object is too small, make the distance smaller by bringing the thermometer closer to the
object. For higher accuracy, make sure that the area of the object is at least twice as large as the
spot being measured.
Note: If the area of the object is much larger than the spot size,
the accuracy of measurement is affected. Also, if the area
of the object is much smaller than the spot size, the
accuracy of measurement may be affected by inclusion of
a part that is not supposed to be measured.
D
Distance
S
Diameter