How do I calibrate a digital thermometer?
I just purchased a digital thermometer for a darkroom photography class and I need to know if it is accurate before I begin mixing chemicals. There is no hex nut to adjust like a dial thermometer. I just purchased a digital thermometer for a darkroom photography class and I need to know if it is accurate before I begin mixing chemicals. There is no hex nut to adjust like on a dial thermometer and there was no instruction manual included.