Usage of multimeter

The multimeter is a multi-functional measuring meter , It can measure current and voltage , Other values such as resistance can also be measured , However, the use method is more complicated . that , How to use a multimeter , The following will introduce .

How to use a multimeter

One 、 Measurement of voltage ：

1、 Measurement of DC voltage ： First, insert the black probe into 【com】 hole , Insert the red pen into 【VΩ】;

2、 Select the knob on the multimeter to a range larger than the estimated value （ Be careful ： The values on the dial are the maximum range ,【V－】 Indicates the DC voltage level ,【V～】 Indicates the AC voltage range ,【A】 It's current gear ）, Then connect the probe to both ends of the power supply or battery ;

3、 Keep contact stable . The value can be read directly from the display , If displayed as 【1】, It indicates that the range is too small , Then it is necessary to add a large number of ranges before measuring industrial electrical appliances . If it appears to the left of the value 【-】, It indicates that the polarity of the probe is opposite to that of the actual power supply , At this time, the red probe is connected to the negative pole ;

4、 Measurement of AC voltage ： The probe socket is the same as the measurement of DC voltage , But you should turn the knob to AC 【V～】 The range required at the location is enough . There is no difference between positive and negative AC voltage , The measurement method is the same as before . Whether measuring AC or DC voltage , Pay attention to personal safety , Don't touch the metal part of the probe with your hand ;

Two 、 The measurement of current ：

1、 Measurement of DC current . First insert the black pen into 【com】 hole . If the measurement is greater than 200mA Current , Insert the red probe into 【10A】 Jack and turn the knob to DC 【10A】 files ; If the measurement is less than 200mA Current , Insert the red probe into 【200mA】 Jack , Turn the knob to DC 200mA Suitable range within . After adjustment , You can measure it . String the multimeter into the circuit , Stay stable , You can read . If displayed as 【1】, Then increase the range ; If it appears to the left of the value -, It indicates that the current flows from the black probe into the multimeter ;

2、 Measurement of AC current ： Measurement method and 1 identical , But the gear should be switched to AC Gear , After the current measurement is completed, the red pen shall be inserted back 【VΩ】 hole ;

3、 ... and 、 Measurement of resistance ：

Insert the probe into 【com】 and 【VΩ】 In the hole , Turn the knob to 【Ω】 Range required in , Connect the probe to both ends of the resistance , One hand can be used to touch the resistance in the measurement , But do not touch both ends of the resistor with both hands at the same time , This will affect the measurement accuracy . When reading , Keep the probe in good contact with the resistance ; Be careful ： stay 【200】 The unit of gear time is 【Ω】, stay 【2K】 To 【200K】 The unit of gear is 【KΩ】,【2M】 The above units are 【MΩ】;

The above is the answer to the use of multimeter , I hope I can help you