A computer-implemented method for automatically generating a combined display of measurement data, the method comprising: establishing, by a mobile computing device, communication connections with a plurality of measurement devices that measure electrical or mechanical properties of equipment and generate measurement data, wherein the plurality of measurement devices include sensors that are placed on or near test points of the equipment, and the sensors generate the measurement data based on sensed electrical or mechanical properties of the equipment at the test points; receiving, by the mobile computing device, measurement data generated by the plurality of measurement devices; analyzing the measurement data to detect information indicating that the measurement data represents related parts of a combined measurement of the same equipment or same parameter of the equipment; and in response to detecting information, indicating that the measurement data represents related parts of a combined measurement: automatically grouping the measurement data received from the plurality of measurement devices based on the detected information in the measurement data; and automatically displaying the grouped measurement data in a combined display comprising a graph without requiring user input to cause preparation of the graph, wherein the measurement data of each measurement device is shown superimposed in the graph sharing at least one axis of measurement. establishing, by a mobile computing device, communication connections with a plurality of measurement devices that measure electrical or mechanical properties of equipment and generate measurement data, wherein the plurality of measurement devices include sensors that are placed on or near test points of the equipment, and the sensors generate the measurement data based on sensed electrical or mechanical properties of the equipment at the test points; receiving, by the mobile computing device, measurement data generated by the plurality of measurement devices; analyzing the measurement data to detect information indicating that the measurement data represents related parts of a combined measurement of the same equipment or same parameter of the equipment; and in response to detecting information, indicating that the measurement data represents related parts of a combined measurement: automatically grouping the measurement data received from the plurality of measurement devices based on the detected information in the measurement data; and automatically displaying the grouped measurement data in a combined display comprising a graph without requiring user input to cause preparation of the graph, wherein the measurement data of each measurement device is shown superimposed in the graph sharing at least one axis of measurement. automatically grouping the measurement data received from the plurality of measurement devices based on the detected information in the measurement data; and automatically displaying the grouped measurement data in a combined display comprising a graph without requiring user input to cause preparation of the graph, wherein the measurement data of each measurement device is shown superimposed in the graph sharing at least one axis of measurement.