Functional safety. Safety instrumented systems for the process industry sector. Part 3. Guidelines for the determination of the required safety integrity levels
State system for ensuring the uniformity of measurements. State verification chain for measuring instruments of length and signal propagation time in optical fiber, average power, attenuation and wavelength of optic radiation for fiber-optical communication and data transmission systems
Semiconducting photoelectric detectors and receiving photoelectric devices. Methods of measuring photoelectric parameters and determining characteristics
