Operating Specifications for Multimeter Measuring DC
1. Carry out mechanical zero adjustment.
2. Select the appropriate range gear.
3. When using the multimeter current block to measure the current, the multimeter should be connected in series in the quilt test circuit, because only the series connection can make the current flowing through the ammeter the same as the measured branch current. When measuring, the branch circuit under test should be disconnected, and the red and black test leads of the multimeter should be connected in series between the two disconnected points. Special attention should be paid to the fact that the ammeter cannot be connected in parallel in the quilt test circuit. Doing so is very dangerous, and it is easy to burn the multimeter.
4. Pay attention to the polarity of the measured electricity.
5. Accurate use of scales and readings.
6. When choosing to use the 2.5a gear of DC current, the red test lead of the multimeter should be inserted into the 2.5a measuring jack, and the range switch can be placed on any range of the DC current gear.
7. Assuming that the DC current measured by the quilt is greater than 2.5a, the 2.5a block can be expanded to 5a block. The method is very simple, the user can connect a 0.24 ohm resistor between the "2.5a" jack and the black test lead jack, so that the gear becomes a 5a current gear. The connected 0.24a resistor should choose a wirewound resistor above 2w, if the power is too small, it will be burned.
