FLIR E40 User Manual

Thermographic measurement techniques30
3. Measure the radiation intensity (= apparent temperature) from the reflecting source
using the following settings:
• Emissivity: 1.0
• D
obj
: 0
You can measure the radiation intensity using one of the following two methods:
Figure 30.3 1 = Reflection source Figure 30.4 1 = Reflection source
Using a thermocouple to measure reflected apparent temperature is not recommended
for two important reasons:
• A thermocouple does not measure radiation intensity
• A thermocouple requires a very good thermal contact to the surface, usually by gluing
and covering the sensor by a thermal isolator.
30.2.1.1.2 Method 2: Reflector method
Follow this procedure:
1. Crumble up a large piece of aluminum foil.
2. Uncrumble the aluminum foil and attach it to a piece of cardboard of the same size.
3. Put the piece of cardboard in front of the object you want to measure. Make sure that
the side with aluminum foil points to the camera.
4. Set the emissivity to 1.0.
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FLIR E40 Specifications

General

Resolution	160 x 120 pixels
Accuracy	±2°C or ±2% of reading
Focus	Manual
Image Storage	SD card
Image Frequency	60 Hz
Digital Camera	3.1 MP
Battery operating time	Approx. 4 hours
Operating Temperature	-15°C to +50°C
Storage Temperature	-40°C to +70°C
Spectral Range	7.5 - 13 µm
Field of View	25° x 19°
Display	3.5 in color LCD
Image Modes	Thermal, Visual, MSX
Measurement Presets	Center Spot, Hot Spot, Cold Spot
File format	JPEG
Battery type	Li-Ion battery
Connectivity	USB, Wi-Fi
Thermal Sensitivity	< 0.07°C @ +30°C (+86°F) / 70 mK