To prepare, select the required range/function with the knob before measuring. Next, insert the red plug of the test lead into the “Input” socket and the black probes into the “COM” terminal. Take the test pin of your digital multimeter and contact the measurement area. Now you can read the numerical value from the display. For optimal results, press the “HOLD” button to freeze the actual readings. To measure different parameters reference the AstroAI User Manual.