When using a single holder on a fixture, a single strip may be used to verify intensity. This strip should, ideally, be exposed for the time T derived from the saturation curve and its arc height shall be within the stated tolerance. In practice, this is not always possible (for example, when integral values of strokes or rotations are used). When that condition occurs, the value used shall be rounded to the nearest practical time to T. An arc height is then obtained from the intersection of the saturation curve with that nearest practical time of T, see Figure 3. This intersection shall be called a “Target Arc Height”. A single strip subsequently peened for the selected nearest practical time must repeat the target arc height to within ±0.038 mm (0.0015 in ch ) or other value acceptable to the responsible authority.
If you have enough data collected to prove your process is stable and repeatable, perhaps you can supply that information to your customer and extend the intensity verification time?