About Temperature Readings - Snap-On ELITE User Manual

Operation

4.4.3 About Temperature Readings

The Thermal Imager measures the emitted infrared radiation from an object(s), and then uses a
known emissivity value to effectively calculate the temperature value displayed on the screen.
To accurately calculate temperature from infrared radiation, the emissivity value of the object
being measured must be entered, see
Use caution if making physical contact with the surface being measured, as the displayed
•
temperature may be different than the actual temperature.
Scale Ranges and Symbols
Depending on the level of emitted infrared radiation being measured, one of two preset
temperature scales are automatically used to display the temperature reading onscreen. The
temperature scale used is automatically selected based on a percentage of the scene
temperature. Temperature scale changes are seamless, and cause no interruption in operation.
Symbols are used to indicate when temperatures are out of the scale range, and are described in
the following chart.
Center Region Temperature (Average) and Palette Range Indicator
The target indicator in the center of the screen measures the Center Region Temperature
(Average). The Center Region Temperature (Average) is dynamically indicated within the color
palette range indicator.
The color palette range indicator shows the complete temperature range of the active measured
scene with the minimum and maximum temperature values of the scene. It is normal for the
min/max temperature values to constantly change.
- Risk of personal injury or harm.
Example
The ">" symbol is used to indicate when the temperature being measured is
above the range of the current scale.
The ">" symbol is also used to indicate when the maximum measurable
temperature has been reached for the current temperature range. There are
two upper limit ranges (see example), and they are automatically selected
based on a percentage of the scene temperature.
The "<" symbol is used to indicate when the temperature being measured is
below -4°F (-20C°).
Emissivity on page 29.
Description
11
Basic Operation (Live Mode)