All Questions
Tagged with measurement voltage-measurement
68
questions
0
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1
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49
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How to Read Unipolar Square Waves on TRMS Multimeter
I'm trying to switch from reading my high-voltage unipolar square wave signal from a benchtop oscilloscope to a handheld multimeter, but I don't understand why my multimeter is giving the voltages it'...
- 69
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2
answers
51
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What does an accuracy of 0.1% + 20 mV mean in a power analyzer's data sheet?
I need to know the measurement accuracy of Keysight N6705C power analyzer. I came across this document (N6700 Modular Power System Family.pdf) that states the error in terms of a percentage plus a ...
- 215
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28
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Understanding Voltage Read in Voltage Divider for NXP S32K118 Microcontroller ADC
I am having a bit of a hard time understanding the voltage read in the voltage divider that is being an input for an ADC to an NXP microcontroller, S32K118. Below is the schematic of the circuit.
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2
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85
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Why might my circuit's measured voltage drop when I add more load to it?
I have one of these power supplies:
I also have an MCR-4V data logger:
If I connect wires directly from the power supply to the data logger (red to red, black to black), then the voltage output on ...
- 113
0
votes
2
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75
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Measure transformer real power
I’m new at making transformers myself, and the ones that I designed had the correct output voltage, and when they were connected to batteries (previously rectified), they give me a an approximate of ...
- 111
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6
answers
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Are there any tricks for measuring high voltages (~1000 V) efficiently?
The simple way to measure voltages above VDD is to use a resistor divider. However, once you get into the 100s of volts these dissipate significant power.
For example, one of my current designs ...
- 7,119
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65
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Uncertainty for measuring a resistor
I am trying to calculate the uncertainty of a measure on a resistor. The expected value of the resistor is 45 mΩ. For measuring the resistor I used the two following instruments:
SM500-CP-90
Agilent ...
- 2,478
2
votes
2
answers
519
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Which is the best method to measure AC voltage?
I am trying to make a UPS circuit. I need to have a high speed measurement for the input AC voltage (220 Vrms) (in order to know whether to turn on/off the inverter). I had tried using this circuit:
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2
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62
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Can I measure pinholes in a dielectric layer using LCR meter?
I have a thin dielectric film (~1 um) and I want to measure the quality of the film in terms of not allowing leakage current through pinholes. Can I use an LCR meter for this purpose? If yes, how? If ...
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43
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Questions about connecting ADS1115 for voltage measurement
Purpose: to measure the voltage on the DC bus (about 600VDC).
ADS1115 Datasheet
I looked at the use cases and saw two connection options (in the first case, we use two inputs, in the second, only one)....
- 535
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127
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Sigma-delta modulator (ADC), can it be used without sinc3 filter?
Purpose: isolated measurement of DC voltage (about 600V).
For these purposes, I found two options:
ADS1115 (I2C ADC) + I2C digital isolator
CA-IS1204 Isolated Sigma-Delta modulator
I am considering ...
- 535
2
votes
3
answers
178
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Measuring variable impedance
I was wondering how to design a measurement system that's able to correctly measure a load impedance that can vary over time and can possibly have very low as well as very high values (see figure ...
- 47
0
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2
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175
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Which variations of the flash ADC is correct?
The flash ADC I learnt in class is this one with R all of the same value:
I found different variations on the internet:
This one has the top resistor with 3 times the value of other resistors.
This ...
- 1
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1
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97
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What does measuring a diode with a DMM's diode mode say about a circuit when the circuit is charged? [closed]
I've never used diode mode before on my DMM, so when I went to measure a diode in my circuit, I had a battery attached to it. I want to understand these measurements.
I measured four devices each with ...
- 47
0
votes
3
answers
581
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Usage of peak-to-peak voltage and RMS voltage
Why are RMS values and peak-to-peak voltages common in use? For example RMS voltages in the context of noise. I see especially for peak-to-peak voltage no practical usage. Why should I need more ...
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