How to easily counted milliamps to amps, and vice versa

Quite often, in practice, it is necessary to recalculate milliamps amps.We experienced electricians with this problem does not arise.But novice experts of such a profile may not immediately answer.As part of this article will describe a simple and affordable ways to perform this operation.

physical quantity

Ampere - a unit that quantifies the strength of the current.Its value can be determined through direct measurements using a multimeter, tester or ammeter (direct method).The current intensity is measured only by sequentially switching the electrical circuit of the measuring device.In the second case, its value can be found by the calculations (indirect method).If the known voltage applied to the chain section, as well as its resistance, it suffices to divide the first to the second - we obtain the desired value.In practice, not so often used amps - a large quantity.Therefore it is necessary to use multiple units - micro (10-6) and Millie (10-3).But for electrical calculations necessary to convert them into the main unit. (Eg milliamps amps).Consider the following example.The voltage on the circuit U = 6 V, and the resistance R = 100 ohms.We define the strength of the current I in him by Ohm's law:

I = U / R, (1)

where:

• U - voltage on the circuit, V;
• R - resistance of the same land, Ohm;
• I - current strength on it,

A. As a result, the calculations we get I = U / R = 6/100 = 0,06 A. It is not easy to grasp the numbers.Therefore, it is converted into multiple units.In this case it is convenient to represent the value in milliamperes.For this obtained value is multiplied by 0.06 A 1000 and obtain 60 mA.You can do the reverse conversion - milliamps to amps.It's enough to share 60 mA in 1000, and we get all the same 0.06 A. This conversion is seen as in amperes mA - 1000. Therefore, divide and multiply it by this number.If you use the prefix "micro" is already to move from one unit to another must be multiplied or divided by 1 000 000.

measurement procedure

As noted earlier, for the measurement of current used ammeters, Multimeters andtesters.The most accurate measurements provide the first of them.They measure only the magnitude of one and only one scale.And this is not very convenient.In turn, multimeters and testers enable you to measure virtually all the electrical quantities and not only in one range.Also, these devices have the ability to switch units.For example, the device indicates that the range is exceeded.In this case, you have to switch to milliamps amps and thus learn the value.The main drawback of multimeters and testers is that unlike ammeters, error have considerably more.But still, in practice they are often used, as it makes it easy to find the problem and fix it.Another important caveat associated with these devices: earlier to be sure to break the chain, now appeared testers and multimeters, which measure the strength of the current in a contactless manner, ie without a connection.Such a solution is increasingly being used in practice.

Summary

Translate milliamps to amps two ways.The first one is to conduct arithmetic calculations using a special factor "1000" (number of milliamps to amps).The second method is based on the use of special measuring equipment - tester and multimeter.They have special switches that allow you to seamlessly convert milliamps to amps and vice versa.Which method is more convenient, and the use in practice.If you can find out by calculating a predetermined value, then it uses exactly this method.Otherwise, the test is performed, the results of which recognize the unknown quantity.