MAL-OPS-1026 v3 7
2.2. Detector Reference Point
The reference point for the detector crystal is marked on the D5 RIID’s outer case.
The detector crystal is cylindrical in shape, meaning that the two crosses on the
device outer casing indicate the central point in both orientations.
External markings remain fixed after normal decontamination procedures (e.g.,
water and mild, nonabrasive detergent).
Reference