I agree with Jack's response but wanted to add some thoughts. Do not overlook Jack's first statement "T2 has nothing to do with the actual peening cycle time". It sounds like you are still in the qualification process and if so T2 is important. As you stated all of your test strips will have a saturation curve associated with them. Each saturation curve will include T1 and T2 to prove out the intensity and when it occurs (T1). I do not understand your statement regarding using a caculation to determine T2. Plot the test strip readings and create your curve then let your curve tell you were T1, T2 and your intensity are occuring. Yes with multiple test strips it is sometimes difficult to get the intensity at each strip to occur at the same exposure time but with proper gun location you can get them close.
