Graphically, it would look like this:
The imager automatically calculates Level and Gain when switched from Automatic to Manual or Semi Automatic modes, thus providing a smooth and meaningful transition of the thermal boundaries of the scene.
Once initially set by the ThermoView imager, Gain and Level can then be adjusted by the user in order to accommodate their specific requirements.
Of course, in practical terms you can’t actually see the values for Gain and Level. You will adjust Gain and Level, but you will see the changes on the MIN and MAX temperature values at each end of the thermal scale. Since we know how Level and Gain are calculated by the imager, it is easy to understand how variations in Gain and Level change the MIN and MAX limit values by solving the Gain and Level equations for MIN and MAX as follows:
Min | Level Gain |
Max | Level Gain |
In summary: you need to adjust Level to get close to temperature level you are interested in and then adjust Gain to get you more or less resolution as needed around the desired level.
Tip: Always begin by selecting the Automatic mode. Automatic mode will suffice for most applications. The unit automatically adjusts the image to show the lowest temperature value present in the thermal scene (MIN) and the highest temperature value in the scene (MAX), at all times. This mode does not require any other adjustment (other than properly focusing the unit). Once you are familiar with the thermal scene you are looking at just press the Up button to activate the Quick Image Fix feature, described on the previous pages. When you press the Up button the imager fixes the MIN and MAX temperature values, thus allowing a more stable thermal image for the viewer. The next step is to capture the image for downloading later. To freeze the image, simply pull the trigger once and then press the Up button to actually save the image.
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