How to use the GVDA multimeter
A multimeter is a comprehensive instrument that can measure AC or DC voltage and current, as well as the resistance of components, general parameters of transistors, and amplifier gain.
Therefore, the wiring of the multimeter transfer switch is more complicated, and its use method must be mastered.
1. Before using the multimeter, the mechanical zero position and electrical zero position should be calibrated. If you want to measure current or voltage, you should first adjust the mechanical zero position of the meter pointer; if you want to measure resistance, you should first adjust the electrical zero position of the meter pointer to avoid To prevent the battery voltage in the watch from dropping and causing measurement errors.
2. Be sure to select the correct gear before measurement, that is, voltage gear, current gear or resistance gear, and at the same time select the correct range. The primary election should be from big to small to avoid breaking the pointer. It is forbidden to switch the range when electrified. The selection principle of the range is? "U, I are in the upper half, R is accurate in the middle", that is, the pointer is above 1/2 of the dial when measuring voltage and current, and the pointer is in the middle of the dial when measuring resistance. only accurate.
3. Pay attention to the polarity of the test leads when measuring DC. When measuring high voltage, insert the red and black test leads into the "2500V" and "-" jacks, place the multimeter on the insulating support, and then touch the test leads to the conductor under test with an insulating tool.
4. When measuring transistors or integrated components, R×1 and R×10k range files shall not be used.
5. Pay attention to prevent short circuit and electric shock accidents during live measurement. From: Electrician World
6. When not in use, do not stop the switch in the ohm position to prevent the battery from being discharged when the test leads are short-circuited.
