This is the simplest path. The input goes through:
On the diagram, this manifested as a clever network of resistors near the input jacks. Elias saw the and the Protection Circuit . Most people ignored the PTC thermistor and the transistors guarding the input, but Elias knew they were the city guards. They stood ready to burn themselves out to save the precious brain if a user accidentally plugged the meter into a wall socket while set to 'Ohms'. dt830d digital multimeter circuit diagram
Slowly, he turned the knob of the DT830D to the 200mV DC voltage range. He touched the probes to a fresh 1.5V AA battery. This is the simplest path