What is the Omega of a multimeter used to measure?
The Ω file of the multimeter is the resistance file, which is used to measure the resistance value of the resistor.
Digital multimeter with automatic range change.
Manual range digital multimeter and automatic range digital multimeter. Their use is very simple, the measurement of resistance, the red pen inserted into the multimeter "VΩ" hole, the black pen inserted into the multimeter "COM" hole, and then the multimeter range switch to the resistance file position (see above), the red and black pens were Contact the two pins of the measured resistor can be read out the resistance value of the resistor.
When measuring, for the multimeter with automatic range change, there is no need to consider the size of the resistance value, the multimeter can automatically switch to the appropriate range. For a multimeter with manual range change, it is necessary to adjust the range switch to the appropriate position according to the size of the resistance value before measurement. In addition, many manual range multimeter, its minimum resistance file can not return to zero, for example, the general 3 / ½ digital multimeter, its 200 Ω file in the red and black pens shorted, the general display of the reading in the zero point a few to one point a few Ω (the smaller this reading is the better), so in the measurement of 10 Ω or less of the small resistance resistance, should be displayed in the reading minus the readings of the red and black pens shorted, so that the result is the true resistance value of a small The result is the true resistance value of the small resistor.
We commonly use the multimeter to test the AC voltage, DC voltage, resistance and so on.
How to test resistance: first switch gear to measure resistance on the gear, to test the object of the wire at both ends were contacted to the metal needle of the meter pen, if there is a beep sound, that the wire through, otherwise disconnected.
How to test the AC voltage: first switch gear to measure the AC voltage on the gear, the meter pen metal needle contact to test whether there is voltage on the terminals, if there is a voltage digital table will show how much the voltage value is.
How to test the DC voltage: first switch gear to the DC voltage measurement gear, the meter pen metal needle contact to test whether there is voltage on the terminals, if there is voltage digital meter will show how much voltage value. If the red meter head is the positive pole of the voltage, the value of the test is positive, such as Li, the red meter head is the negative pole of the voltage, the value of the test is negative.
3. Safe operation of the norms and common sense.
In our daily life, if, encounter wire burnt, lamp burnt out, or need to carry out electrical work. Need to ask a professional to operate. Specifically, you should first disconnect the power, check the power, hang a warning sign. Wear insulated shoes, put on insulated gloves, two people to operate. Only we in our daily life to improve the safety awareness of electricity, not arbitrary private wires, arbitrary climbing high-voltage poles and so on. Only we all operate in accordance with the norms, in order to safely use electricity at the same time to ensure our personal safety.
