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LCR Meter U1733C "rn" Symbol Meaning

I have the Keysight U1733C LCR Meter and when I meausure inductance shows me the "rn" letters in front of the Henry units. Do you know what it means (on the manual I found only the SI units -...
DarkKnight's user avatar
0 votes
1 answer
64 views

Does LC circuit convert DC to AC?

I was experimenting with LC circuit (Class 12 - Physics, India) in CircuitJS1 Simmulator. Interestingly, the LC circuit given below was converting DC into AC. Circuit: Circuit Specifications: DC ...
Mrinmoy Sarkar's user avatar
0 votes
0 answers
50 views

DC Bias network for a LCR meter

I am trying to make a DC bias network for my LCR meter (Scientific SM6023) based on this circuit I found online RD10E has a Zener voltage of about 10V and 1N4004 has a forward voltage of 1V. I have ...
amogh waghmare's user avatar
0 votes
2 answers
109 views

Asymmetric LC tank with diodes

Is there a circuit that can produce an asymmetric wave, where some parameters of positive and negative half waves are different, such as voltage amplitude or time? Intuition says that we need a ...
Surprised Seagull's user avatar
0 votes
0 answers
84 views

Immo coil - Resistance, Reactance and Impedance - Differences needed

Since I work in an automobile lock manufacturing company, I was measuring the DC resistance of an Immo coil using a multimeter (used in automobiles for security purposes) and found out the value was ...
Mandeesh Singh's user avatar
0 votes
0 answers
111 views

Measure Delta wound BLDC motor inductance and resistance

I'm using a VESC motor ESC to drive several different motors. When I connect a new motor, it has the ability to detect the motor parameters, but somehow gets it wrong for some of the larger motors: ...
Jedi Engineer's user avatar
0 votes
0 answers
80 views

What's the best way to measure air-core transformer and variable capacitor using an LCR

In order to create a model I need to measure the capacitance of a variable capacitor and an air-core transformer. This is my first time dealing with old models of capacitors and inductors and I'm ...
Nana's user avatar
  • 11
1 vote
0 answers
46 views

Online motor inductance measurement at different rotor angle

I wanted to measure the inductance of PMSM at different rotor angles. I'm familiar with the offline methods of measuring motor inductance but would like to measure a motor's inductance while it's ...
Adisu Teshale's user avatar
5 votes
2 answers
701 views

How to calculate the natural frequency of a series LC circuit?

The below question is just to exemplify what I mean, I don't need help with this question, but rather the concepts behind it From the wwikipedia article on natural frequency I concluded that for an LC ...
math and physics forever's user avatar
2 votes
1 answer
216 views

How to read this accuracy chart?

I've never seen a chart like this before. I'm just trying to figure out what the accuracy of this LCR meter (BK891) is between the 10-100 µF region. Why does it look like it's putting capacitance vs ...
AJ_Smoothie's user avatar
0 votes
0 answers
102 views

Resonance in a series parallel combination circuit

This lc circuit has capacitors in parallel and series with the inductor. What happens at resonance? Will it be parallel resonance, series resonance or can you have multiple resonances? Is the total ...
user1897830's user avatar
1 vote
0 answers
81 views

Why is the current flowing 1 s after being disconnected \$\frac{1}{e}\ \mathrm{A}\$ instead of \$1-\frac{1}{e}\ \mathrm{A}\$?

If in the given circuit (L = 100 mH, R = 100 Ω, and E = 100 V), after being in steady state for a long time, A and B are connected, find the current flowing in the circuit after a millisecond. To do ...
math and physics forever's user avatar
0 votes
2 answers
142 views

How to find an equivalent LC circuit from a combination LC circuit [closed]

I have a circuit containing a number of L and C, both in parallel and series. How can I find the equivalent LC circuit (with a single L and C) for such a circuit? Kirchhoff or Thevenin can give me the ...
Achintya Paradkar's user avatar
0 votes
1 answer
213 views

Inductive or capacitive load?

Here I have a series LCR circuit with resonant frequency greater than 200Hz. Is there a way to know whether this circuit is an inductive or a capacitive load? Edit: The only additional information we ...
DINEDINE's user avatar
  • 103
18 votes
5 answers
9k views

What does negative capacitance mean?

I see negative capacitance measuring electrolytic capacitor at high frequencies (40kHz). How should I interpret that? The device is LCR Meter Hantek 1832C. I failed to find anything about that in the ...
max5555's user avatar
  • 285
0 votes
1 answer
152 views

Finding ESR of LCR circuit?

I have an LCR circuit, and I am trying to find the ESR of a capacitor. I bought a 820uH inductor , and an ultra-low 1000pF capacitor, and a 46.6ohm 1% tolerance resistor. Below is my circuit with ...
Sam 's user avatar
  • 319
0 votes
2 answers
192 views

Two-port network parameter measurement using an LCR meter

I was wondering if it's possible to find the admittance parameters of a pi two-port network experimentally using an LCR meter. For the network shown below, we have $$ \begin{bmatrix} I1\\ I2 \end{...
Likely's user avatar
  • 47
0 votes
1 answer
240 views

Determine inductance of large inductor

I asked a similar question before but i am still struggling with this problem. I am trying to measure the inductance of a large (34cm diameter) electromagnetic brake. Important findings to keep in ...
Rens's user avatar
  • 259
5 votes
3 answers
5k views

What is the difference between ESR and DCR?

I am measuring the inductance of a large coil using an LCR meter. I am using the series equivalent measurement mode at 100 Hz. Why does the LCR meter show that the ESR is 656 Ohm and why does my ...
Rens's user avatar
  • 259
0 votes
1 answer
65 views

Phase Difference Between dynamic voltage and input current

I have a RLC circuit, and I know if we wish to calculate the phase difference between Voltage and Input current then the formula is $$ \phi = \tan^{-1} \frac{X_L -X_C}{R} $$ But as we already know, ...
somanshu's user avatar
8 votes
1 answer
3k views

How to choose the right frequency when measuring coil inductance with LCR meter

I would like to drive a 12V DC hydraulic valve coil using a high side driver (VN7140AJ). The driver datasheet specifies the maximum demagnetization energy (page 24), and I would like to make sure that ...
Toun's user avatar
  • 205
0 votes
1 answer
139 views

Measuring capacitance of Metal-Insulator-Semiconductor (MIS) structure with LCR meter

I can not get my head around what a LCR meter measures. My LCR meter measures my device (MIS) which is displayed as C_p and G_p (other components can be neglected). My LCR meter displays C_p, G_p, the ...
Maxim's user avatar
  • 475
0 votes
1 answer
79 views

LCR meter weird datasheet

I have a LCR meter. In the datasheet there is a measurement frequency given for the inductance measurement. But not for the measurement of the capacitance. Is the frequency for the capacitance ...
Yoomo's user avatar
  • 363
2 votes
2 answers
579 views

LC in parallel with R circuit resonance

I've been doing an experiment which involves measuring the voltage across the capacitor at different driving frequencies. Consider the circuit below: A sketch of the experimental curve \$(R_1<R_2&...
Chern-Simons's user avatar
-1 votes
3 answers
536 views

Measure in circuit SMD capacitor using LCR meter

I recently bought an LCR meter BK880. Is it possible to measure the capacitance of a SMD capacitor in a circuit without removing it?
alexhelloworld's user avatar
0 votes
0 answers
760 views

Unstable behavior of Dc-Dc converter

I am currently working on a high voltage boost converter based on Dos4Evers 555 timer based one https://www.dos4ever.com/flyback/flyback.html (12v to 140-220V). I am running into an issue with the ...
soup's user avatar
  • 105
1 vote
2 answers
809 views

Measure universal motor inductance with LCR meter

I'm trying to measure the inductance and equivalent series resistance of an universal motor (from a sewing machine, 120V, 0.8A) with a B&K 879B LCR meter. The measurements vary widely with the ...
Stefan's user avatar
  • 209
0 votes
2 answers
372 views

Will I blow up my LCR Meter?

I have a situation where I need to measure a capacitor connected to a live circuit like the image shows. I'm considering a LCR meter because we also have to measure both capacitance and resistance of ...
appoks's user avatar
  • 1
1 vote
0 answers
39 views

How to read instrument's range graph

I have an Agilent 4980 LCR meter and in its manual it has several graphs indicating the effective measurement ranges for each scale, like the one below: How to read such a graph to be sure that the ...
Luiz Fernando Vieira Dias's user avatar
0 votes
1 answer
184 views

LCR meter defect - preventive actions

I got my hands on a BK880 LCR meter and now it's the second time that I destroyed the device. It can't hold the measurement voltage - So it always tries to measure with around 0V. What I am doing ...
Eggi's user avatar
  • 334
1 vote
2 answers
1k views

Agilent 4294A Impedance Analyzer: "Bridge Unbalanced" during calibration

I am having problems calibrating my test fixture for the Agilent 4294A Impedance Analyzer. The open measurement always works, but with the short measurement I always get the error message "Bridge ...
Charly's user avatar
  • 752
-1 votes
1 answer
115 views

Custom Test Fixture for LCR meter

I've designed and built a custom test fixture (based on Keysight's 16047A) to be able to measure multiple pin capacitors. When testing it to compare both fixtures (the custom and the original), I ...
Luiz Fernando Vieira Dias's user avatar
1 vote
0 answers
110 views

Resonant, autotuned nanopulser

My need is to build (or purchase, if existent) a nanopulser, but not an ordinary one: it has to have some specific characteristics. The premise is: I have a device which acts as a variable capacitor ...
Devesh's user avatar
  • 55
1 vote
2 answers
1k views

Why does an SMPS use LCR on INPUT?

I have this 5 V output SMPS I bought a while ago. I was wondering why there are LCRs connected to the input of my SMPS. I don't understand why it's there. BTW, I'm an electrical engineering student, ...
Aimkiller's user avatar
  • 364
1 vote
2 answers
3k views

Phase shift in an LCR circuit

In a capacitive circuit the voltage lags current by 90 degrees. In an inductive circuit voltage leads current by 90 degrees. In a resistive circuit voltage and current are in phase. If we have a ...
user1897830's user avatar
0 votes
2 answers
444 views

Air-core transformer measurement using LCR meter

Is it possible to measure the magnetizing and leakage inductances of an air-core transformer (coupled coils with no ferrite core) normally using LCR meter? I want to get the values of magnetizing ...
user139731's user avatar
1 vote
1 answer
210 views

How possible is producing very high voltage and electric arc by a using this simple setup

I have the basic series RLC circuit in simulation below. As one can see in SPICE simulation, the output voltage at resonance frequency goes upto 1KV: Can I really obtain that much voltage as in the ...
user16307's user avatar
  • 12.2k
0 votes
0 answers
437 views

Is it possible to test capacitors on a logic board?

First, I would like to know if it is possible to test a capacitor while it is soldered to a logic board, or does it have to be unsoldered first? Second, is it possible to do so with a multimeter? ...
Jean-François Beauchamp's user avatar
1 vote
2 answers
3k views

Conjugate, non-conjugate and single poles in an RLC circuit system

In all the texts I encountered so far, I find the following pole-zero diagram example for an RLC series circuit: The transfer function for the above circuit can be found as: H(s) = XC/(R + XL + XC) =...
user16307's user avatar
  • 12.2k
-1 votes
1 answer
250 views

LCR circuits with changing input frequencies

simulate this circuit – Schematic created using CircuitLab Ok, imagine an LCR circuit with a resonant frequency f connected to a signal generator inputting a sine wave. The signal generator ...
Bryan.Russell.Potts's user avatar
0 votes
1 answer
1k views

How to measure High-Frequency inductance of inductor using an LCR meter?

I have a High-Frequency inductor available and I want to measure the inductance using the Rohde&Schwarz HM8118 LCR meter. If I change the frequency to 100kHz and voltage level to 1.5V (max) I get ...
user203's user avatar
  • 39
0 votes
3 answers
1k views

Finding the frequencies for a given phase difference between supply voltage and supply current

I am trying to solve a LCR related exercise, but I ran into a problem. Here is the exercise task and information: An alternating current circuit is composed of a 50 Ω resistor, an ideal inductor ...
Daniel Tork's user avatar
  • 1,418
0 votes
4 answers
4k views

LCR circuit with squarewave input: Why does the output take a decreasing amplitude through each cycle?

I understand a square-wave will be made up of a sum of sine waves in the form $$\frac{1}{n}sin(nf_0)$$ So when a squarewave is input to a LCR circut designed to be a bandpass filter, it will ...
Maitiu's user avatar
  • 79
0 votes
1 answer
917 views

Determining the resonant angular frequency

I am facing trouble with finding out the resonant angular frequency of the above circuit.I know that at resonance impedence of the circuit is minimum.I am new to this topic and I tried to find out the ...
Pink's user avatar
  • 196
1 vote
2 answers
3k views

Using a varactor diode to tune a resonance frequency

I think this is a question is some very elementary circuit design but... I want to use a varactor diode to tune the resonance frequency of a resonator I have built. I understand that a varactor is a ...
user27119's user avatar
  • 247
0 votes
2 answers
2k views

DC bias of LCR meter

I need to measure inductors with a small DC bias current. Small is a relative term and here as in won't cause any significant voltage drop in the cables of the LCR meter but enough to put my inductor ...
winny's user avatar
  • 15.7k