Multimeter stall introduction

Update date:2018-04-12 Source:MAXGE

Multimeter stall introduction

Multimeter components

1, header:

It is a high-sensitivity magneto-electricity DC current meter. The main performance indicators of a multimeter basically depend on the performance of the meter. The sensitivity of the meter refers to the value of the DC current flowing through the meter when the meter pointer is full-scale deflection. The smaller the value, the higher the meter's sensitivity. The greater the internal resistance when measuring the voltage, the better its performance. There are four tick marks on the meter. Their functions are as follows: The first (from top to bottom) is marked with R or Ω, indicating the resistance value. When the switch is in the ohmic range, it reads the tick mark. The second bar marked with ∽ and VA indicates AC and DC voltage and DC current. When the switch is in AC and DC voltage or DC current, and the range is in any position other than AC 10V, read the scale. line. The third is marked with 10V, indicates the AC voltage value of 10V, when the switch is in AC and DC voltage block, the range is in AC 10V, then read this tick. The fourth bar is marked with dB, indicating the audio level.


2, measuring lines

The measurement circuit is a circuit for converting various measured DC currents that are suitable for metering. It is composed of a resistor, a semiconductor element, and a battery.

It can convert all kinds of different measured (such as current, voltage, resistance, etc.) and different ranges through a series of processes (such as rectification, shunting, partial pressure, etc.) into a certain amount of tiny DC current. Header for measurement.

3, switch

Its role is to select a variety of different measurement lines to meet the measurement requirements of different types and different ranges. There are generally two switchers, each marked with a different gear and range.

4, table pens and table pen jack

The pens are divided into red and black. When using, insert the red test lead into the jack marked with a "+" sign, and insert the black test lead into the jack marked with a "-" sign.


Multimeter stall description:

1, switch file:

When the band switch arrow points here, the multimeter turns off and no longer appears. The multimeter can be turned on at any other location to keep it working.

2, AC voltage file:

Used to measure AC voltage, such as home sockets that are commonly used by everyone, to adjust the voltage to adjust the position to this position.

3, DC voltage file:

Used to measure DC voltage, such as measuring the battery voltage of electric vehicles, it is necessary to use DC voltage.

4, mV level low voltage (AC/DC multiplex):

It is also measuring voltage, but it is used to measure relatively weak voltage. Generally, when we encounter the amplifier amplification circuit, we will use this file to test the input small signal. This file can measure AC or DC voltage, and switch its function through the yellow button in the upper right corner.

5, resistance / diode / buzzer file:

This file is used to measure the resistance of the resistor. You can also switch functions by using the yellow button in the upper right corner. The buzzer file is commonly used to check whether there is a short circuit in the circuit board or the connector. Generally, the buzzer file is selected.


6, capacitor file:

Used to measure capacitance. When measuring, pay attention to the polarity of the capacitor. Connect the positive electrode to the red meter and the negative electrode to the black meter.

7, current file (AC/DC multiplex):

The following 7th, 8th and 9th gears are used to measure the current. Select different gears according to the current size range, and switch the AC/DC through the yellow button in the upper right corner. If you do not know the current range, you must first select a larger gear (7), and then gradually select a small gear to test.

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