Fundamentals of Multimeters
The digital multimeter is an active instrument and must be connected to the power supply to work, so use
When using a digital multimeter, the battery should be installed first. Most DMMs use layers
Take the DT 8 9 0 B digital multimeter as an example, open the back cover of the digital multimeter,
Install a 9 V stacked battery, then cover the back cover, and then insert the test leads into the digital
into the socket of the multimeter. Generally, it is customary to separate the red test pens according to different measurement needs.
Insert it into the "V%" or "m A" or "A" jack as the positive test lead, and insert the black test lead into the
The "COM" jack acts as a negative test lead. Press the power switch on the control panel
(P 0 W E R ), the LCD display should display “0 0 0 ”. if it shows
The word "BAT" means that the battery voltage is insufficient and a new battery should be replaced. Use digit million
When measuring with a meter, you should first select the corresponding gear according to the measurement object, and then
Estimate the size of the measurement object and select the appropriate range.
