Omega Vehicle Security OS643W - Manual (Page 11)

OPERATION
Infrared Radiation Measurements
1. When the power is off, pressing the MEAS button turns on the power.
2. Use "IR / K" switch to select IR Temperature function.
3. Use " " switch to turn on or turn off the display Back-Light.
4. Use "°F/°C" switch to select °F or °C the Temperature Range.
5. Point the lens at the object whose temperature is to be measured.
6. Press the MEAS button. Measurement is performed as long as the MEAS
button is kept pressed.
7. Referring to the spot size figure.
NOTE: Although the field of measurement (or Field of View) and the spot
almost coincide, actually the field of measurement corresponds to the
diameter for 90% optical response. The object whose temperature is to be
measured needs to be larger than the measurement diameter (spot of size)
by an adequate margin at least 1.5 to 2 times larger.
8. Read the display.
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