Multimeter is a very useful tool for the electrician . beli digital multimeter From time to time electricians need for this profession. Qualified electrician or electrical engineer education is not the only user of the meter. For domestic purposes, you can use amateur radio can also be used for their own purposes , and so on .
Talk about analog multimeter first. Analog Multimeter is a special scale to determine the pointer moves to indicate the measured variable. Well, peremennyenapryazheniya , current and resistance are measured with this device. You must select a variable on the device before taking any action.
Rotary switch below the dial to make a selection.
You can see the different options to switch brands voltage (AC / DC), Amps (AC / DC) and Om . Sorry man, I did not say that the amps and ohms. This unit of measurement for electric current and resistance , respectively.
Voltage (AC / DC) can have multiple ranges. beli digital multimeter A similar case amperes. So before going to measure one of these parameters , it would be better if you have an idea about the importance of setting you want to measure . If you have an idea , you must select a range significantly higher than the estimate . We have an example here . Our domestic electricity voltage 110V or 240V. If you know that this is 110 for measurement, you can select a range of 200V per meter. But if you have any confusion , it makes sense to select a range of more than 240.
First reading will help you to confirm it. If you find it close to 110V, you can now select a range of 200V and you can get a more accurate measurement.
Any choice upper range is not harmful to the instrument. But after selecting the range is less than the measured value can damage the appliance . When choosing a much higher range , the device is safe , but the measurement is less accurate .
V is a unit potential difference between two points. So when you want to know the voltage , you really want to find the potential difference between two points. Thus , you should contact probes from two points of interest. Well, you have to push the other ends of the probes to the corresponding connectors on the meter first. Take two test leads on both hands and make contact with the two target points with the leaders of the drivers. Be careful not to touch the exposed tips with yourfingers. Both objectives must be free of dirt and foreign matter.
Otherwise , you can not get the correct result .
To get an accurate result to the extent that you need to display a pointer to avoid parallax. You know that the parallax ? Let me explain . Your eyes should be perfect with a vertical wheel, when you look at the index. Any other angle you add reading error . Some manufacturers add a mirror strip along the side of the scale , which provides an image without parallax .
A unit of electrical current is the ampere . Thus , the amplifier is a flowchart ( electrons). For flow measuring instrument to be placed in the flow path . Thus , you must make room for the counter to accommodate the flow path . The following diagrams make it clear to you.
