Which is the ohm file of the universal meter, and how to use the ohm file of the multimeter

There are five ohmic gears in the universal meter, that is, x2 x10 x100 x1k x1k x10k, all of which measure resistance, collectively referred to as ohmic gears. As shown in the rectangle, the red arrow is marked with.

Introduction to the universal meter:

A multimeter is a magnetoelectric instrument with a rectifier that can measure a variety of electrical parameters such as AC and DC current, voltage and resistance. For each type of electrical quantity, there are generally several ranges. It is also known as multi-meter or multimeter for short.

The multimeter is composed of a magnetoelectric ammeter (meter), a measuring circuit, and a selector switch. By selecting the switch change, a wide range of electrical parameters can be easily measured. The main basis for its circuit calculations is Ohm's law for closed circuits.

There are many types of multimeters, and they should be selected according to different requirements when they are used.

The multimeter consists of three main parts: the meter, the measuring circuit and the transfer switch. The multimeter is the most basic tool in the field of electronic testing, and it is also a widely used test instrument. Multimeter is also called multimeter, three-purpose meter (a, v, that is, current, voltage, resistance three-purpose), multiplex meter, multimeter, multimeter is divided into pointer multimeter and digital multimeter, there is also an oscilloscope multimeter with oscilloscope function, is a multi-functional, multi-range measuring instrument.

Generally, the multimeter can measure DC current, DC voltage, AC voltage, resistance and audio level, and some can also measure AC current, capacitance, inductance, temperature and some parameters of semiconductors (diodes, transistors). Digital multimeters have become mainstream and have replaced analog meters. Compared with analog instruments, digital instruments have high sensitivity, high accuracy, clear display, strong overload capacity, easy to carry, and are more convenient and simple to use.

Now the gear referred to is the ohmic gear.

x2 x10 x100 x1k x10k These five gears are all used to measure resistance, collectively referred to as ohmic gears, and your multimeter also says it.

See the character " " below the table? The gears it includes are the gears where the resistance is measured.

Like the one with the headphone symbol.

First of all, insert the red watch pen "V" into the sedan car, and the black watch pen into the "com" jack, multimeter.

The function transfer switch of the ohmic gear is turned to the corresponding range of the ohmic gear, and the operation is completed.

The use of the ohmic file of the multimeter is to clear the rent by measuring the current and calculate it using a simple formula, known as Ohm's law.

The formula is i=u r, and the current is equal to the ratio of voltage to resistance, and the specific method is as follows:

1. When the multimeter voltage is measured in ohms, it is connected with the micro-ampere meter in parallel with a resistor, which can play the role of voltage division. As a result, the measurement results can be easily calculated.

2. The multimeter ohmic function transfer switch is turned to the corresponding range of the ohmic gear, and the display screen shows "1" when there is no input. If the resistance to be measured exceeds the maximum value of the selected range, the display shows "1", in which case a higher range should be selected.

3. When measuring the low resistance with 200 resistors in the ohmic file of the multimeter, the two meter pens should be short-circuited first, and the resistance of the two meter pens should be measured, and then the measurement results should be subtracted from this value to obtain the actual value.

1. Prepare the multimeter.

and the circuit board to be tested], insert the [red and black test leads] into the multimeter, as shown in the following figure:

2. Press the [Power button] to open the multimeter, as shown in the figure below

3. Click [Ohm.

file], as shown in the figure below:

4. Contact the two watch pens, if the beep is out of the limelight, it means that the gear is correct, and the short circuit test begins, as shown in the figure below

5. Short circuit test: test whether the two test points of the circuit board are short-circuited, if the beep appears, it means that the circuit is short-circuited, as shown in the following figure

6. Resistance test: Click [select], select the ohmic unit, and test the resistance of the circuit board components, as shown in the figure below

7. Then find the two test points of the item to be tested, as shown in the figure below

The ohmic gear appears after the power is off, which means that the resistance has no resistance or the gear is too large, and 0L is overload, which means that it is out of range. Turn the twist to the ohmic gear, such as 1k gear, and then put the two watch pens in contact, at this time adjust the zero twist so that the watch hand points to 0 ohms, and then you can measure the resistance, but this gear is generally to measure the resistance between 1k and 100k, and the liquid envy must change gears to measure the small resistance resistance, and repeat the zero adjustment step every time you change gears. Look at the watch with your eyes perpendicular to the surface.

The OL of the DMM stands for "over load", which is generally the maximum measured value of the range with the measured value, if the circuit is open in the resistance range.

That is, if there is no input resistor, OL will be displayed. Digital Vanyu pre-meter, a multi-purpose electronic measuring instrument, generally including an ampere meter and voltmeter.

Functions such as ohmmeters, sometimes referred to as multimeters, multimeters, multimeters, or triplemeters. The OL of the DMM stands for "over load", which is generally the maximum measured value of the range with the measured value, and if the resistance is open in the resistance range, that is, there is no input resistance, OL will be displayed. A digital multimeter, a multi-purpose electronic measuring instrument, generally contains ampere meter, voltmeter, ohmmeter and other functions, and is sometimes called a multi-purpose meter, a multi-meter, a multi-meter, or a three-meter meter.

1. Prepare the [multimeter and the circuit board to be tested], and insert the [red and black test lead] into the multimeter, as shown in the following figure:

2. Press the [Power button] to open the multimeter, as shown in the figure below

3. Click [Ohm] as shown in the figure below

4. Contact the two table pens, if the beep appears, it means that the gear is correct and the short circuit test begins, as shown in the figure below

5. Short circuit test: test whether the two test points of the circuit board are short-circuited, if the beep appears, it means that the circuit is short-circuited, as shown in the following figure

6. Resistance test: Click [SELECT] to select the ohmic unit to test the resistance of the circuit board components, as shown in the following figure

7. Then find the two test points of the item to be tested, as shown in the figure below

There are several gears in the ohm gear: :*1 *10 *100 and so on. The measured value is multiplied by the value of the selected gear. If *10 is selected, and the direct reading number of the test piece is 10, then the actual resistance value is 100 ohms.

Multimeter resistance file ohmic file use practice one.

Multimeter resistance file ohmic file use practice one.

Wan Jing Bureau with the watch of the Ohm Liang Cha let file usage:

1. Gear switch: the gear required to move to the ohm gear; Not coincidentally.

2. Pointer zeroing: the two watch pens are shorted, and the zeroing knob is adjusted so that the pointer points to the zero position;

3. Connect the resistance measurement to be measured: the reading of the dial resistance ruler, multiply by the multiple of the gear switch, and multiply by the resistance value;

4. The pointer is more accurate near the middle, and it can be used for shift test;

5. Do not touch the resistance with both hands to reduce the measurement error;

6. After the measurement, the multimeter gear is adjusted to the highest gear of AC voltage, or the disconnection gear.