Review on BTMETER BT-1500 Non-Contact Pyrometer: Industrial Laser Thermometer Gun for High Temperature Measurements by Ron Josey

After installing the battery, pull the trigger to turn it on. degrees Celsius and degrees Fahrenheit. Press UP to turn on the backlight. Hold the trigger and press the triangle * to turn the laser on or off. When measuring temperature with an IR thermometer, each material has different reflective properties that require accurate readings. This is the emissivity. Look at the table in the guide for the basic emissivities for different materials or look at the line. To set the emissivity, with the device powered on, press the E key to toggle between editing and non-editing. Adjust with UP or DN button. Hope this helps someone. It took me about an hour to figure it out. The instructions don't help. All in all it seems to be a very good device once that hurdle is cleared.