The API Manual of Petroleum Measurement Standards (MPMS) is currently available. The manual will eventually include all subject matter now found in API API MPMS 2.2A.pdf Chapter 2 T a n k Calibration 2. API IS NOT UNDERTAKING TO MEET THE DUTIES OF EMPLOYERS, MANU- FACTURERS, OR SUPPLIERS TO WARN ORManual of Petroleum Measurement Standards Chapter 2.2G Calibration of Upright 2. API MPMS CHAPTER 2.2G 6 Electro-optical Device Calibration and API MPMS 2.2D pdf free download.Manual of Petroleum Measurement Standards Chapter 2—Tank Calibration. 5 Equipment 5.1 ELECTRO-OPTICAL DISTANCE-RANGING Manual of Petroleum Measurement Standards Chapter 2-Tank Calibration Section 2B-Calibration of Upright Cylindrical Tanks Using the Optical Reference Line