Schematic Power Amplifier and Layout

How to test Electronic Circuits damaged by avo meter

AVO meters essential job functions of each electronic circuits electronics because it helps get the job done easily and quickly, but before using them, users must know in advance the types of AVO meters and how to use it to avoid any wear and damage AVO meters it.

It works on the principle there are two types of AVO meters are:
1. Digital AVO meter
2. Analog meter AVO
Both types are of course different from each other, but there are some similarities in terms of operations, the required source of energy, DC battery and cables investigators red and black.

Digital AVO meter on measurement results can be read directly in the form of numbers (digits), while an analog meter AVO displays using a needle to indicate the movement of the scale, so to obtain measuring results, should be read by Range or difinisi , AVO meters analogue more commonly used because it is more cheaper than the Digital AVO meter, but there are also those who choose analog meters for AVO sheer indulgence.

How to measure the DC voltage
• Put the selector switch (selector switch) on the position of the DC voltage
• Select a measure (2.5,10,50,250,1000) and should be chosen limits equal to or greater than the voltage to be measured, for example the voltage to be measured 12v then measure that limits should be selected is 50.
• No limit may choose a smaller size, because the needle will move past the maximum limit and can damage the moving coil.
• Connect the voltage source, connect the red wire on the positive and the black wire is connected to the negative, how fitting it is called a parallel relationship, if reversed polarity wiring, the meter needle will move left.
• Read the board in accordance with the scale where the pointer stops, the most appropriate way to read is straight up to avoid reading errors.
How to measure the AC voltage
• Put the selector switch (selector switch) on the position of AC voltage
• Select a measure (10,50,250,1000) limit the selected measures should be equal to or greater than the voltage to be measured, for example voltage 220v to measure the size limit that must be selected is 250, should not be choosing a smaller limit for the needle will move past the maximum limit and will damage the moving coil.
• Connect the probe to a voltage source in parallel, to an AC voltage of red and black wires can be freely connected to the voltage source for AC voltage polarity has no (+/-).
• Read the board in accordance with the scale where the pointer stops, the most appropriate way to read is straight up to avoid reading errors.

How to measure the flow of DC electrical circuits

How to measure the flow is quite different from measuring the voltage, where the circuit to measure current series are fitted with means to load, the load can be a resistor, or other lights.

• Set the selector switch (selector switch) on the DC current posis
• Set the selector’s position on the measure limits higher than the current to be measured, the limit measure can be chosen the highest order not to damage the AVO meter, influences the selection of measurement limits too far from the current to be measured only result in less accurate readings.
• Connect the cable series with the load, the load can be in series on cable or on cable negative positive, if reversed polarity wiring, the meter needle will move to the left.
• Read the current appointment on the board according to the scale of the DC current needle position.

How to measure the resistance

Resistansi measuring point is to identify between a component in a damaged condition or better, and to determine what is the value of resistance, Suppose that a resistor has a color code brown, black, red and gold tolerance is, means that the resistor has a value of 1000 ohms with a tolerance of 5%, resistor that is still good to say when the measured value is between plus or minus 5% from 1000, or between 950 to 1050 ohms.
• Set the selector switch on the ohm position
• select the measuring limit (range) are: x1, x10, x100, or x1K (adjust the resistor value)
• First investigator cable short circuit that moves the needle toward the right foot and can be set to indicate the maximum scale by rotating the adjust Zero, meaning that meter readings can be / in accordance with the scale and range used.
• start measuring resistor by connecting the cable on both feet investigators resistors in parallel, by ignoring the cable colors ….
• Read the appropriate board where the needle-scale meter stops, and multiply the reading by measuring the limit, for example needle 10 indicates the scale and size limits using the x100 then the value of these resistors is 1000 ohms.