The acs712 measures current in two directions.
Ac current measurement.
Ac current is an extremely important quantity to learn in the case of industrial.
The differences in the measurement result from the fact that the multimeter has to rectify the alternating waveform to enable it to measure ac current.
This is known as the peak or crest value of an ac waveform.
The difference between the highest and lowest peaks of the ac voltage.
It can be easy to blow a fuse if the meter is placed slightly improperly.
Using a multimeter to measure current is often discouraged due to the difficulty of disconnecting a part in the circuit then placing the meter in line properly so that damage does not occur.
Although the same basic steps are used for taking the ac current measurement as when a normal dc measurement is taken there are a few additional points to note.
The three ways are.
It s the maximum voltage that the ac voltage attains.
A measurement of the largest voltage present between 0 v and the highest point on the ac cycle.
Generally speaking voltage measured in ac power systems should be within 10 and 5.
One way to express the intensity or magnitude also called the amplitude of an ac quantity is to measure its peak height on a waveform graph.
There are actually three ways you can measure voltage in an ac circuit.
When different from an expected measurement voltage is more likely to be lower than normal.
It means that if we sample fast enough and long enough we sure to find the peak in one direction and the peak in another direction as the acs712 have 5 μs output rise time in response to step input current.
In general all ac voltage sources vary from fluctuation in ac voltage over power distribution systems.
In most ac voltages the peak to peak voltage is double the peak voltage.
Figure below peak voltage of a waveform.
Another way is to measure the total height between opposite peaks.
It s certainly a valuable function on the meter but it is worth emphasizing the greater risk than for measuring voltage or resistance.