1.1 This part of ISO 4008 defines only the requirements and characteristics of test benches necessary to ensure consistent results when an injection pump is tested to its manufacturer's test specification regardless of the origin of the test bench. 1.2 This part of ISO 4008 establishes requirements for control and supply of calibration fluid to the fuel injection pump, for receipt of the fluid from the fuel injection pump, as well as requirements for the accuracy of the measuring equipment of test benches.