Digital Multimeter DC Voltage Stage and Voltage Measurement Method Illustration
The same in the measurement of DC voltage before you find the corresponding DC gear in which, the general voltage file will have a logo "V", DC file will have a smooth line segment, from the above figure I think we should also see.
If you are not too clear about the voltage of the power supply to be measured, you can adjust the digital meter to the maximum range, for example, in the figure above, the maximum range of this multimeter DC voltage file for 1000 volts, you can choose this range, and then connect the meter pen to the power supply to be measured on both sides of the display shows the voltage value of the power supply to be measured, according to the value shown, and then further select the appropriate range.
Measured power supply voltage of about 3 volts, this time you can choose a 20-volt range of DC voltage gear, and measure it again, you can see that this time the result is 3.90 volts (marking 3.7 volts), than a large number of ranges measured accurately.
For the digital table has a good advantage, that is, do not know the power supply positive and negative cases, even if the red and black pens are reversed, it does not matter, only in the measurement results this will be a difference of a "-" sign, for analogue table can not be so play, even the reverse is likely to be the pointer to the bend.
Measure the voltage when I use one hand to press the pen, but not at the other end of the power supply, if it is a low-voltage DC so that operation is possible, but if the voltage is too high, for safety reasons, do not use your hand to touch the pen and the power supply. If the power supply to be tested does not know the voltage, it is best not to touch it with your hand.
