Specifications include, but are not limited to: The calibration of radiation survey instruments must be sensitive enough to insure the instrument detects radiation emitted from radioactive materials. The survey instrument must be calibrated on all required scale readings (e.g.,x o.1, x1, x10, x100, and x1000) in millirem per hour with a radiation source as per Scope of Accreditation of ISO/IEL 17025-2017 & ANSI/NCSL Z540-1-1994. • Calibration of survey instruments shall be performed using radioactive material (electronic calibration is not acceptable) o The calibration source activity or dose rates at specified distances shall be traceable to a standard certified to with +/- 5 % percent accuracy to a primary radiation standard such as those maintained by the U.S. National Institute of Standards and Technology o The calibration source shall approximate a point source o For linear scale instruments, each scale of the instrument shall be calibrated on a least two points located at approximately 1/3 and 2/3 of full scale; for logarithmic scale instruments, each scale shall be calibrated at midrange for each decade and at two points on at least one decade; and for digital instruments at three points between 2 and 1000 millirem per hour o For dose rate instruments, the instrument shall be calibrated so that an accuracy within plus or minus 20 percent of the calibration source can be demonstrated at each point o The date of calibration shall be conspicuously noted on the instrument • Records of radiation survey instrument calibration details must accompany each instrument • Shipping and handling cost for receiving and returning instruments. The Model 451P requires extra shipping costs for transportation of identified hazardous material outlined in the US Department of Transportation regulations.
