https://docs.emtronaustralia.com.au/engine-management/config/channels/calculated-runtimes/index.htmlMain The Calculated runtimes Main is where the Efficiency Calculation and Load Calculation runtimes are defined. The runtime is defined by nominating the air mass calculation and or blend to used to arrive at the runtime result This permits the user to quickly utilize more complex forms of efficiency & load calculationHugoen-us