Hi,
I am using DSO-X 3034A series to work on a simple RC circuit to verify capacitor discharge voltage in 1msec through 680 ohm.
Theoretically i am calculating using equation
V=12*(exp(-0.01/(4.7uF*680))) which come out to be 8.77V but using DSO I am not able to verify it. Practically when I measured with DSO it is discharge to 5V.
I have attached RC circuit and waveform captured. Below is the test procedure that I am following
1. Set trigger on falling edge and trigger level to 8V.
2. Connect CRO probe (10:1) across C1 and Press SW1 till cap charges to 12V.
3. Press single capture mode on DSO.
3. Release SW1 and immediately press SW2.
4. Save captured waveform.
Request you to Please clarify how can I measure accurate signal voltage for this RC circuit?
I am using DSO-X 3034A series to work on a simple RC circuit to verify capacitor discharge voltage in 1msec through 680 ohm.
Theoretically i am calculating using equation
V=12*(exp(-0.01/(4.7uF*680))) which come out to be 8.77V but using DSO I am not able to verify it. Practically when I measured with DSO it is discharge to 5V.
I have attached RC circuit and waveform captured. Below is the test procedure that I am following
1. Set trigger on falling edge and trigger level to 8V.
2. Connect CRO probe (10:1) across C1 and Press SW1 till cap charges to 12V.
3. Press single capture mode on DSO.
3. Release SW1 and immediately press SW2.
4. Save captured waveform.
Request you to Please clarify how can I measure accurate signal voltage for this RC circuit?
If so what you are doing is probably the best way with an oscilloscope. Be aware that the vertical resolution in only 8 bits (256 levels) which is not unusual for oscilloscopes as they are primarily visual instruments rather than absolute accuracy instruments. But sometimes people think they are interchangeable with high bit-count DMMs which they are not (this is why the 3-digit DMM feature of this scope is an add-on option).
You could also use other instruments such as LCR meters or function generators to characterize in time or frequency to higher accuracy but it depends on what you have on-hand in your lab.