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To improve the gas detection rate, place the Imager where:
•
The temperature difference between the gas and the background environment is the greatest.
•
There is a light wind.
•
There is limited clutter in the background scene. A clear blue sky is optimal.
•
The Imager is stable. When possible, use a tripod and High Gain (Tripod) mode.
•
The Imager is close to the leak. If close proximity is not possible, use the 2X lens.
Table
17
lists the guidelines for the Imager to detect a gas leak based on the annual gas loss rate.
Annual Gas
Loss Rate
<10 lbs (<4.5 kg)
10 lbs to 50 lbs (4.5 kg
to 22,7 kg)
>50 lbs (>22,7 kg)
Table 17. Detection Guidelines
•
The greatest possible difference between the gas and the background
environment temperatures
Wind speed: <1.12 mps (<2.5 mph)
•
•
Uniform background scene (clear blue sky)
•
Imager on a tripod, close to the gas leak.
≥10 °C difference between the gas and the background environment temperatures
•
•
Wind speed: <2.24 mps (<5 mph)
•
Variable background scene (clear blue sky, high altitude clouds okay)
•
Imager on a tripod.
≥3 °C difference between the gas and the background environment temperatures
•
Wind speed: <4.47 mps (<10 mph)
•
•
Variable background scene (high altitude clouds okay)
•
Imager on a tripod or handheld.
Professional Series Thermal Imagers
Guidelines
Menus
37
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