How to work and measure with an oscilloscope in simple and fast language
How to work with an oscilloscope or how to measure with Oscilloscope:
Before starting work with an oscilloscope, we must do two things:
A) Initial settings
Gain the Variable Control keys, which are smaller as the keys on the Volt / DiV y Time / Div keys (gray) to rotate clockwise to the end.
In oscilloscopes, the sliding keys should be facing upwards and the pressure switches should all be out.
B) Adjust the position of the zero channels
Set the three-mode AC GND switch to GND mode for both channels and set the vertical axis to zero with the Position knob. Use the Intensity and Focus keys to adjust the light intensity and wavelength, respectively, and set the keys to DC after adjusting the ground.
Measurement Voltage (Domain ):
Count the number of vertically enclosed cells from the peak to the lowest point of the wave and multiply by the Volt / Div of that channel. The number obtained will be the size of the amplitude of the PP wave. For example, if VOLT / DIV is on the number 2 and the number of cells enclosed by the wave in the vertical direction is 3.4, then multiply these two numbers to get the amount of voltage.
We have: amplitude (voltage) = number of volts / div × number of vertical cells
Period or frequency measurement:
Multiply the number of horizontal cells along a periodicity by the Time / Div unit and invert the number to get the wave frequency. For example, número, tiempo / div on ms50 and the number of horizontal cells in a Course equal to 5.2
Period (T = de tiempo / div × number of horizontal houses)
5.2 × 50ms =260ms
F = 1 / T = 1 / 260ms = 3.8hz <= frequency
Flow measurement :
As we know, an oscilloscope can only be used to measure voltage and we can not measure current with it. To do this, we set a 1 ohm power in the circuit and according to the ohm’s law in this case we have V = RI and R = 1? So we have V = 1 × I (meaning V will be equal to I) and by measuring the voltage we actually measure the current.
Measuring potential difference :
INV key: This key reverses the signal and is used to calculate the potential difference. If V1 is the input of CH1 and V2 is the input of CH2 for Potential differences V2-V1 we do the following:
We add CH1 with the inverse of CH2 (that is, we put it in ADD mode and two INV buttons are pressed for the channel).
CH1 [ADD] ([INV] CH2) =CH2-CH1=V2-V1
Phase difference measurement :
A) Time domain method: In this method Oscilloscope Put it in DUAL mode and display the signals of channels 1 and 2 together, then calculate the phase difference from the diagram according to the values of T and T0 and from the following relations.
B) Lissage method: In the method Lisaur To calculate the phase difference, we put the oscilloscope in XY mode and after the appearance of a stable Lysagus waveform, we calculate the phase difference according to the shape and the following relationship. After connecting the two signals to the channels, first both channels. Set to GND mode to set the created point of light in the middle of the coordinate axis. Then set to DC mode to obtain the phase difference.