I can't tell the exact time but it's really fast. Press the button and it shows the result almost immediately. Measuring the speed will take a longer time, for about 2s. 

The CO2 change is quite rapid. I moved it into a car and the change was immediate- climbing until the CO2 level was ""achieved"" 

Sorry, our device does not support temperature adjustment. The temperature range of the INK-CO2W detector is -10°C ~ 40°C (±2°C) / 14℉ ~ 104℉ (±3.6℉), and the temperature error is normal within ±3.6℉. Hope this information is helpful to you. 

Mine reset itself the next day, I didn't do anything to initiate it. 

No. I bought it based on the claim that it would support the weight, but it doesn't. However, i have found that if I don't try to use the cantilevered function, but just use the height of the combined tripod and arm (straight up) and the ball joint holding the binoculars, I have more than enough height to see anything up to about 75 degrees comfortably. In the video, the eyepieces are at 6', and there is easily another foot of extension available.