Measuring method of ohm block of digital multimeter
The main purpose of the digital ohm file is to measure the resistance of the motor winding, to measure whether the wire is broken, to measure the continuity of the plug, and so on. The number 1 means: the measured resistance value is greater than the resistance value set by the dial of the multimeter (for example, when measuring a 1K resistance, and you turn the dial to 200Ω, the reading will display 1) infinity (horizontal 8 characters) is the resistance value of the insulator .
Measuring method of digital multimeter ohm block
1. Select an appropriate magnification. When measuring resistance with an ohmmeter, an appropriate magnification should be selected so that the pointer indicates near the median value. It is best not to use the left third of the scale, which is poorly scaled.
2. Adjust to zero before use.
3. Do not measure with power on.
4. The resistance under test cannot have a parallel branch.
5. When measuring the equivalent resistance of polar components such as transistors and electrolysis, you must pay attention to the polarity of the two pens.
6. When measuring the equivalent resistance of nonlinear components with the ohm block of different magnifications of the multimeter, the measured resistance values are different. This is because the median resistance and full-scale current of each gear are different. In mechanical watches, the smaller the magnification, the smaller the measured resistance value.
Tag: Digital Multimeter
