This part specifies the calibration traceability system of natural gamma logging tools, the technical performance of special measuring instruments for natural gamma rays, and the calibration methods and requirements for logging tools. This section applies to the natural gamma logging tool scale.
SY/T 6582.2-2003 The calibration for petroleum nuclear logging tool Part 2:The calibration for natural gamma-ray logging tool has been changed from SY/T 6255-1996 .