4649d6c5_on_Procedure___Ophir_Photonics__Explanation
[Item] Total energy calibration error Expanded error K=2.0 (95% confidence level) [2] ±3.9% [Explanation] 
95% of cases are within 2.0 std deviations
Power/Energy Meter Calibration Procedure - Ophir Photonics
Explanation