Electrical measurement and measurement method in detail

Magnetic flap thermometer to measure is measured with the standard amount of difference, so as to determine the measurement of numerical method called d-value method. For example, using unbalanced bridge resistance measurement. Nsd magnetic flap | | glass thermometer thermometer floating ball | | glass thermometer thermometer two-color thermometer

quantity change in the process of measurement standards, to be measured is equal, even if their difference is zero, so as to determine the measured numerical method called zero value method. Judging homodyne values by referring to the zero meter, the circuit in equilibrium, so they are called balance method. Using potentiometer side electric potential, for example, use a bridge to measure resistance and so on all belongs to a kind of method. Nsd magnetic flap | | glass thermometer thermometer floating ball | | glass thermometer thermometer two-color thermometer

will be measured and known standard measure respectively with a side access device, if maintaining the reading instrument, then this dish that is equal to a known standard volume to be tested. The magnetic flap thermometer measurement method called instead of the method. For example, use instead of measuring insulation resistance. Nsd magnetic flap | | glass thermometer thermometer floating ball | | glass thermometer thermometer two-color thermometer falls,

with comparison method, due to the directly involved in the standard DuLiangQi, so compared with direct reading method has higher accuracy. However, comparison of measuring instrument and the test conditions of the demand is higher, operation is more troublesome. So, usually only used when in high accuracy measurement. Nsd magnetic flap | | glass thermometer thermometer floating ball | | glass thermometer thermometer two-color thermometer

whether direct reading method, or comparison method, be glass thermometer measured values can be directly read in an experiment. This way of measurement is called direct measurement. Sometimes used in electrical measurement of indirect measurement of the way. Measured and other alleged indirect measurement, it is according to the amount of functional relation, first measure other amount, then according to the formula and estimation in the side. Using voltammetry resistance measurement, for example, is first measured electric jade and current, and then use ohm's law formula calculated indirectly measured resistance of digital. Indirect measurement error is larger than direct measurement, but also to calculate, so often have trouble with direct lateral 2 when used. Nsd magnetic flap | | glass thermometer thermometer floating ball | | glass thermometer thermometer two-color thermometer,

measurement usually refers to the method through experiment, set a side plate of the size of the unknown. The unknown quantity is called by side. It is measured in order to determine, and as a unit of measure, comparing the amount of similar standard is measured to determine how many times or how many points is the unit of measure is one of the to the size of the mountain by the measurement of ( Including numerical and unit) 。 All kinds of quantity of electricity or magnetic measurement, collectively known as electrical measurement. Electrical measurement is, in other words, the amount of power being measured or broken, with similar standard electricity or magnetic quantity as measurement unit, to determine the size of the measuring process. Nsd magnetic flap | | glass thermometer thermometer floating ball | | glass thermometer thermometer two-color thermometer

in the measurement unit of measure is actually used in replication, called DuLiangQi. DuLiangQi should be high enough precision and according to the qualitative, so as to ensure the accuracy of measurement. DuLiangQi, depending on the accuracy and utility of benchmark DuLiangQi most and standards. Benchmark DuLiangQi is modern technology can achieve the highest degree of accuracy of the altar, for the highest measurement by the international and national department. To guarantee the accuracy of the measurement instrument is consistent, but also set up different levels of standard DuLiangQi, measurement of the instrument to test the low level, the value passed to the first production line correctly. Electrical measurement commonly used standard degree of mixer has the Nsd magnetic flap | | glass thermometer thermometer floating ball | | glass thermometer thermometer two-color thermometer

standard battery, standard resistor, inductor and capacitor, etc. Nsd magnetic flap | | glass thermometer thermometer floating ball | | glass thermometer thermometer two-color thermometer

but, each kind of measurement does not necessarily have to have the most direct participation. When floating ball thermometer when we measured with their flat heavy basin, there must be balance as DuLiangQi farmar, and when using a spring balance weight and measurement, there is no direct involvement of DuLiangQi, when we use the bridge resistance, you must have a standard resistor, and with the ohmmeter measuring electrical Yang, there would be no direct involvement of standard resistance. No DuLiangQi directly involved in the equipment can also be used to measure the most, because they had graduated in using standard measuring tool for verification. In electrical measurement, which can be read using direct instructions instrument measured values, without DuLiangQi directly involved in the method, called the direct reading method. _ BuShu with ohm resistance loss test and current Nsd magnetic flap | | glass thermometer thermometer floating ball | | glass thermometer thermometer two-color thermometer

table measure current, voltage meter measuring voltage and so on all belongs to the law. This method is very simple, so it is widely applied. With the law should be relatively, anyone who need DuLiangQi directly involved in the, in the process of measurement and is measured by comparing the instrument to determine the numerical method, called the comparison method. According to the measured way, compared with standard volume comparison method is divided into difference method, the zero value and instead of three. Nsd magnetic flap | | glass thermometer thermometer floating ball | | glass thermometer thermometer two-color thermometer

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