Questions and answers
Why are continuous measurements not possible?
Due to the time dependent internal noise, Radioactivity-Meter needs a well defined start situation to calculate the result. For contiuous measurements, the start situations would change in time. Instead of one zero point and one gauge value, time dependent gauge series were necessary, to calibrate Radioactivity-Meter.
Why is a relaxation time necessary after each measurement?
With increasing up time of the camera, the internal noise situation changes. Therefore a relaxation time is necessary to reset the camera hardware to a well defined start situation. Without this, more gauge values were necessary for the calibration of Radioactivity-Meter.
Why is a calibration necessary?
The hardware of the various smartphones differ in their noise and their reaction to the radioactive radiation. Therefore at least 2 calibration values are necessary, to fit an internal linear progress to an objective straight line of proportional measurement values concerning the zero point and the slope of the line.
What is the meaning of 3 question marks "???" in the display?
If 3 question marks "???" are displayed, no valid value could be calculated. This may sometimes happen due to the stochastic character of the measurement or the radioactivity is too high to be calculated correctly or the current zero point is not really the zero point, since the zero point was fixed while radioactive radiation was still present. If always 3 question marks "???" are displayed and never a value, your smartphone is in principle not suited as radioactivity meter.