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A multimeter is used to measure three electrical characteristics in circuits: Voltage Current and Resistance. AC and DC voltage and current can be measured. These three are related by Ohms law: Voltage ( in volts) = Current (in amps) times Resistance (in ohms) see http://en.wikipedia.org/wiki/Ohm%27s_law
The main component in a multimeter is a micro amp meter. A hair thin wire is wound around an iron core on a pivot and with in a permanent magnetic field. When current flows through the coil it produces a magnetic force proportional to the current that causes the coil to move on the pivot against the permanent magnetic field. A pointer is attached to the coil and it move past the meter scale.
The coil has some resistance 50 Ohms. If one volt of direct current is applied the 200 Milli amps of that current would turn the coil with so much force that it would pin the needle or break the mechanism. Typical micro ammeters are limited to 50 micro amps maximum.
In a parallel circuit current divides inversely proportionally to the resistance. If a wire of 0.5 ohms is placed in parallel with the meter coil then 99% of the current will go through the wire (shunt) and 1% will go through the coil. The meter range would become 5000 micro amps or 5 Milli amps. If the shunt was made to .05 ohms the range would be 50 milli amps.
Instead of a shunt a resistor of 4,950 ohms is wired in series with the coil. Now the total resistance is 5,000 ohms if 100 volts is placed across the meter and shunt the meter will only show 50 micro amps.
Wiki User
∙ 14y ago
Wiki User
∙ 13y agoMultimeter measures various electrical signals. Voltage, resistance, current etc. They have two probes and an analogue scale with a pointer. You attach the probes to either end of the thing you are measuring and read off the scale.
Wiki User
∙ 13y agoA: By letting some current flow from the internal battery to flow and measuring the voltage across it and translating to resistance reading
Wiki User
∙ 13y agoin parallel
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How do you work the Etek 10709 multimeter?
Turn it on and press start.
Why does the multimeter show the RMS value of sine wave but not for the triangular wave?
Because your multimeter is not an adequate device for this kind of measurement. Use the correct multimeter to display the triangular wave value.
What tool is used to check voltage?
by using a multimeter we can find line voltage.
Can you calibrate voltmeter on multimeter or multimeter on voltmeter?
how which is right and which is wrong. You need a voltage standard with that you can calibrate both to the standard
What are the black and red things hanging off a multimeter?
They are called test leads, you would use them to connect the multimeter to the points that are to be tested.
How do you work the Etek 10709 multimeter?
Turn it on and press start.
How can you test a battery?
You can test a battery by using multimeter. Set the multimeter to the DC voltmeter setting and then place the leads of the multimeter across the leads of the battery. the multimeter will have a readout of the voltage.
What is the purpose of an automotive multimeter?
An automotive multimeter, like any multimeter, can be used to test the voltage or current in some kind of circuit. As it is an automotive multimeter it is aimed more towards the used in a car.
Why does your headlight not work on a 2003 Honda foreman?
my headlights work. but if yours don't, you should see if the socket is getting power with a multimeter. if you don't have a multimeter, just try replacing the bulb. if that doesn't fix it, you should check fuses, relays, and switches. Or just take the car to a mechanic.
How do you test a motorcycle regulator off the motorcycle?
You check it with a multimeter and refer to you work shop manual for the correct reading
Who has a wide range digital or analog multimeter?
The analog multimeter has a wider range.
Is it possible to test a diode with multimeter?
Yes it is possible to test a diode with a multimeter.
How can you check Integrated Circuits with a multimeter?
To check the IC by the multimeter, you have to make sure that the pointer points at the current. You can then connect the multimeter across the check the IC.
What are the types of multi tester?
A Multimeter is an electronic instrument, every electronic technician and engineer’s widely used piece of test equipment. A multimeter is mainly used to measure the three basic electrical characteristics of voltage, current, and resistance. There are two types of multimeters: Analog Multimeter: The Analog Multimeter or VOM (Volt-Ohm-Milliammeter) is constructed using a moving coil meter and a pointer to indicate the reading on the scale. Digital Multimeter: We mostly used a multimeter is a digital multimeter (DMM). The DMM performs all functions from AC to DC other than analog. It has two probes positive and negative indicated with black and red color as shown in the figure. there are some best multimeters for HVAC.
How many volts takes multimeter?
In Digital multimeter we use 9V Dc battery.
How do you use a multimeter tester on dryer coils?
Generally, dryer coils either work or they don't. A multimeter can help you determine if a dryer coil is "burned out". If the coil has "continuity", it's probably fine. Generally, if there is a hot spot in the coil it will burn out rapidly.
What are the multimeter symbols?
Where can I get copy explaining what the symbols mean on a sperry multimeter and how to use them. Regards Frank
