Questions tagged [measurement]
Measurement is the assignment of numbers to objects or events. All measurements consist of three parts: magnitude, dimensions (units) and uncertainty.
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Measurement frequency for indicated coil inductance
This choke inductor has an inductance of 100 µH according to the website.
I know, however, that inductance varies with frequency (due to parasitics). So, I was wondering at which frequency was the ...
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Imperial measurements [closed]
I am studying electricity, electronics, and electrical engineering.
Could somehow show me how to use the below pictures, which cover conversions? I know it is showing conversions for metric and ...
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What frequencies can crocodile (alligator) probes carry?
When measuring with an oscilloscope, I use an original high frequency oscilloscope probe and a double side crocodile (alligator) clip and the results are usually very close.
Note: it is called ...
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How to measure Lithium-ion battery SoC?
I have a 48 V 12 Ah Lithium-ion battery pack.
I am struggling in finding a way to measure its State of Charge.
It will be charged through a 13S JBD BMS.
I need to spit out information from the battery ...
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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'...
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Using 50 Ω coax cable instead of passive probe
Preface, why am I asking this question?
Instead of using a passive probe with a ground clip, I want a more "permanent" and reliable connection for my measurements. Note: I'm not talking ...
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How to measure multiple resistances with Arduino Uno, without one measurement influencing the other?
I'm working on a project where I aim to measure resistances using an Arduino Uno. I started with two separate voltage dividers, each using a 1 MOhm reference resistor, connected to a common Arduino ...
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What is the real resolution of my voltage measurement when I use only some of the range of of the ADCchannel
I have a 16 bit ADC, I use the +/1 V range, differential channel. If I used the full range of the ADC to provide full resolution (I am aware non-linearity and noise may affect this) this calculates as:...
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My isolation transformer has its protective earth connected to the output neutral. How should I rewire it for my home lab for "DUT probing"?
I have a rather sturdy isolation transformer in my home lab and I just realized that the primary side earth is not only connected to the output side earth but also to the output side neutral. I don't ...
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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 ...
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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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Determining Suitable TRMS Voltmeter Specs for Modulated Signal Measurement
I'm seeking advice on selecting a TRMS (True RMS) voltmeter suitable for measuring the voltage across a resistor with a modulated signal. Here's the scenario:
I need to measure the TRMS voltage across ...
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Induction motors torque measurement
I am to calculate the running efficiency of a 3-Ph squirrel cage induction motor. I have the rated data for the motor. I have the load speed of the motor but I need output torque to calculate the ...
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Pulse width modulation using ML4800CP
I am working on a SMPS (450 V output). It use an ML4800CP IC to control and manage 450 V DC.
How can I measure the PWM signal using an oscilloscope? I attached it, and it worked well for the PFC ...
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Measuring nA leakage current
I'm trying to measure some leakage currents of both a diode (expected around 5 nA) and a MOSFET (20 nA).
My issue is my meter's measurement accuracy is only around 10 uA, and I need an accurate ...
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