Questions tagged [lcr]
The lcr tag has no summary.
53 questions
0 votes
3 answers
228 views
+50
Measurement correction with LCR meter
I would like to correct the values that I am measuring with an LCR meter (specifically the LCR6002 from GW Instek). I am a bit acquainted with electronics in a very basic level, but here, my knowledge ...
- 149
0 votes
1 answer
107 views
LCR meters that use AC excitation for measuring polarized capacitors. How do they get away with it?
I have a DE-5000 LCR meter. It uses an AC excitation signal of 600 mV, and doesn't apply a DC voltage when measuring capacitance. Which means there is a reverse voltage across the capacitor 50% of the ...
- 193
7 votes
3 answers
1k views
Can 2-wire measurement reach 4-wire precision?
I recently came across the TIDA-060029 documentation from Texas Instruments (auto-balancing impedance measurement), and I’m not fully sure whether the method used in that design is 2-wire or 4-wire. ...
- 305
0 votes
0 answers
83 views
How to measure AC resistance of a transformer using LCR meter?
Say I have a high frequency SMPS type of transformer. I want to measure its AC resistance using an LCR meter. The LCR meter will give an AC resistance reading, but as I understand it, the AC ...
- 65
0 votes
0 answers
81 views
What does the "MAX 36 V" mentioned at the bottom of my Proster BM4070 mean?
I accidentally measured the inductance of a coil while it was connected to 24V power supply. The probe holes on the meter (+/-) smoked a little bit and smelt like something burnt, before I realized ...
- 47
0 votes
1 answer
100 views
SR830 as LCR meter?
I am wondering if anyone can help gauge how well I can measure some small capacitance (1.5 pF with ~.05 pF steps/resolution) with a SR830 lock-in amplifier versus a dedicated LCR meter such as the ...
- 1
0 votes
1 answer
83 views
Determine inductive elements in transformer model
A model of a single phase, \$500 \text{V} / 6 \text{V} \$ two winding transformer, with an ideal transformer in the middle is seen below simulate this circuit – Schematic created using ...
- 4,776
2 votes
4 answers
496 views
How to measure inductance of a coil? I tried finding the time constant and then using it to find L but the value does not match with LCR meter
I have built a simple RL circuit connected to a 12 Vdc power supply through a switch. The resistance value of resistor is 159.5 Ω and the internal resistance of my inductive coil is 160 Ω. At the ...
- 47
-1 votes
2 answers
176 views
Measure capacitance on live circuit
Is there any LCR meter on the market that allows a user to measure capacitance on a live circuit without disconnecting it from power?
- 43
4 votes
1 answer
535 views
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 -...
- 853
0 votes
1 answer
226 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 ...
0 votes
2 answers
160 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 ...
0 votes
0 answers
250 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 ...
- 101
0 votes
0 answers
100 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 ...
- 11
1 vote
0 answers
75 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 ...
