January 2015 Tech Guide: Calibrators & Controls Jan 15, 2015 | Calibrators, Controls, Quality Systems | CLP’s January 2015 Tech Guide features a range of calibrators and controls from vendors such as Beckman Coulter, Randox Laboratories, Roche Diagnostics, and Siemens Healthcare Diagnostics. The file is available as a downloadable PDF. If you do not have Adobe Acrobat, you can download it for free from Adobe.