| Code Value |
Definition |
| Background | Measurement of environmental background. The data shall be recorded without subtraction of intrinsic activity. |
| Calibration | Measurement to be used for any type of calibration (e.g., energy, stabilization, efficiency). |
| Foreground | Measurement of an unknown radiation field. The data shall be recorded without subtraction of environmental background or intrinsic activity. |
| IntrinsicActivity | Measurement of the radiation intrinsic to the radiation instrument, without contribution from the environment or other sources. |
| NotSpecified | The object being measured by the instrument cannot be specified by the user or radiation instrument. |