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VT02
Users Manual
Review Memory
The Memory mode lets you view the stored images. You can also delete
images in this menu.
1. Push F to open the Memory mode.
2. Push D/C to scroll through and review the stored images.
3. Push F to delete image.
Emissivity
The emissivity is adjustable in 0.01 steps from 0.10 to 01.00. The default value
is set at 0.95.
The correct emissivity values are important for you to make the most accurate
temperature measurements. Emissivity of a surface can have a large effect on
the apparent temperatures that the Product observes. Understanding the
emissivity of the inspection surface can, but not always, allow you to obtain
more accurate temperature measurements.
Temperature Measurement
All objects radiate infrared energy. The quantity of energy radiated is based on
the actual surface temperature and the surface emissivity of the object. The
Product senses the infrared energy from the surface of the object and uses this
data to calculate an estimated temperature value. Many common objects and
materials such as painted metal, wood, water, skin, and cloth are very good at
radiating energy and it is easy to get relatively accurate measurements. For
surfaces that are good at radiating energy (high emissivity), the emissivity
factor is ≥90 % (0.90). This simplification does not work on shiny surfaces or
unpainted metals as they have an emissivity of <60 % (0.60). These materials
are not good at radiating energy and are classified as low emissivity. To more
accurately measure materials with a low emissivity, an emissivity correction is
necessary. Adjustment to the emissivity value will usually allow the Product to
calculate a more accurate estimate of the actual temperature.
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