Bullard QXT Thermal Imager
The number (0-99) is a reference point indicating the relative level of ETT engagement; by itself it has no specific meaning. When engaged, the LEFT and RIGHT buttons adjust ETT.
Electronic Thermal Throttle (ETT) is a hot spot indicator for locating heat sources in overhaul and size up, electrical troubleshooting etc. When engaged, ETT senses the hottest area in the scene and colors it blue.
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