RS Pro RS-979E Manual De Instrucciones página 5

Thermal Imager / English
5-4. Desktop
The Desktop is as follow:
1. Battery capacity status
2. Temperature unit 8. Centre point temperature readings
3. Distance unit 9. Centre point Cross
4. Emissivity 10. Main menu
5. Wifi status 11. Max temperature of current scene
6. SD card 12. Min temperature of current scene
7. Time 13. Color bar
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5-5. Shutter
The thermal image of the Thermal Imager becomes blurry, when the Thermal Imager no correcting after some minutes or
the Thermal Imager changes target. To get fine thermal image, the Thermal Imager need to correct.
The Thermal Imager has two mode for correcting, Manual and Auto Mode. In Manual Mode, long press the down arrow
button, the Thermal Imager will correct. In Auto Mode, the Thermal Imager can correct automatically while The thermal
image of the Thermal Imager becomes blurry .
5-6. Temperature Measurement
All objects radiate infrared energy. The quantity of energy radiated is base on the actual surface temperature and the
surface emissivity of the object. The Thermal Imager 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 >=0.90. This simplification does not
work on shiny surfaces or unpainted metals as they have an emissivity of <0.6. 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 setting will usually allow the Thermal Imager to calculate a more
accurate estimate of the actual temperature. More information please see Emissivity Adjustment to get the most
accurate temperature measurements.
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5-7. Emissivity Adjustment
The correct emissivity value is important to make the most accurate temperature measurement. Emissivity of a surface
can have a large effect on the apparent temperatures that the Thermal Imager observes. Understanding the emissivity of
the surface, but may not always, allow you to obtain more accurate temperature measurements.
Note: Surfaces with an emissivity of <0.60 make reliable and consistent determination of actual temperature problematic.
The lower the emissivity, the more potential error is associated with the Imager's temperature measurement calculations.
This is also true even when adjustments to the emissivity and reflected background adjustments are performed properly.
Emissivity is set directly as a value or from a list of emissivity values for some common materials. The global emissivity
displays in LCD Screen as E=x.xx.
The following table gives typical emissivity of important materials.
Material Emissivity
Water 0.96
Stainless steel 0.14
Aluminum plate 0.09
Asphalt 0.96
Concrete 0.97
Cast iron 0.81
Rubber 0.95
Wood 0.85
Brick 0.75
5-8. Reflected Temperature
• Using the offset factor, the reflection is calculated out due to the low emissivity and the accuracy of the temperature
measurement with infrared instruments is improved.
• In most cases, the reflected temperature is identical to the ambient air temperature.
• Only when objects with strong emissions with much higher temperature are in the proximity of the object being
measured should be determined and used.
• The reflected temperature has only little effect on objects with high emissivity.
• The reflected temperature can be set individually.
• Follow these steps to get the right value for the reflected temperature.
1. Set the emissivity to 1.0
2. Adjust the optical lens to near focus
3. Looking in the opposite direction away from the object, take a measurement and freeze the image
4. Determine the average value of the image and use that value for your input of reflected temperature.
5-9. Thermal Imager Reporter Software
• Thermal Imager Reporter software is supplied with the Thermal Imager.
• This Software is intended for Thermal Imager and contains feature to analyze images, organize data and information,
and make professional reports.
• Thermal Imager Reporter software allows audio annotations and commentary to be reviewed on a PC.
Thermal Imager / English
Material Emissivity
Tape 0.96
Brass plate 0.06
Human skin 0.98
PVC plastic 0.93
Polycarbonate 0.80
Oxidized copper 0.78
Rust 0.80
Paint 0.90
Soil 0.93
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