Measurement with the multimeters R, L, C in the circuit.

[tigr]

With interest I learned that my multimeters has the ability to measure R, L, C in the circuit.

[tigr]

Good in-circuit measuring accuracy.

[Kleinstein]

It depends on the circuit if R / C / L can be measured in circuit. Sometime it works, but often it can not be done.

[tigr]

Yes,of course. We will try to analyze it. While measuring inductances, there were no problems.

[tigr]

Why do we need inductor measurements in the circuit? For example, we need an inductor 100 uH. The value is not indicated. The two multimeters have almost the same values. This means that the multimeter AMPROBE 37XR-A can be trusted.

[tigr]

Let's see how the industrial device measures R,L,C,ESR in the circuit.
Sencore LC-103.
Quickly Test Capacitors & Inductors In-Circuit
& Fully Analyze Capacitors & Inductors
For All Of The Ways They Fail Out Of Circuit
INDUCTOR VALUE
Now you can automatically
test coils and
transformer values from
0.1 microhenry to
20 henrys with a
patented inductance test. The ReZolver™
is truly unique in that it tests for
inductance and not inductive reactance,
which is frequency dependent. To make
the inductance test just push the
Inductance Value button and
automatically read any inductance value
from 0.1 microhenry to 20 henrys directly
with the accuracy you need for modern
circuits. Full autoranging speeds up the
tests and greatly reduces operator errors.
INDUCTOR RINGER
The automatic ringing
test finds even one
shorted turn. This
effective Q test strikes
the coil under test with a
sharp pulse. The coil is tested to see how
many rings it will product until it dampens
to the 25% level. Sencore Engineers have
empirically determined that any air core
or ferrite core coil will ring at least
10 times before decaying to less than 25%,
if it is not shorted or open. Any coil that
rings 10 or higher is good. This patented
test is used in nearly 60,000 Sencore
instruments daily and works every time.
Dynamic Inductor Tests Analyze All Defects -
Even Single Shorted Turns!
http://www.broadcaststore.com/pdf/model/793702/LC103%20brochure-6956.pdf
On different cores in different points of the circuit, gives a very good result.
Transformer.

[tigr]

Measuring capacitance in the circuit is the most difficult measurement. This is due to the shunting effect of other radio components. The lower the shunt resistance, the greater the measurement error.
Ceramic capacitor.

[ollopa]

I don't understand what it is that you believe makes a meter suitable for in-circuit testing.  The in-circuit impedance is going to be affected by the impedance of components and paths in parallel to the device under test.  The only thing that the meter can change is the characteristic of the stimulus signal (voltage, current, frequency, and waveform), but that is only likely to show a difference in the case where you have frequency-dependent parallel impedances or if you have semiconductors in parallel and you stay below their turn-on threshold.

The circuit typically dictates whether or not a component can be measured in-circuit regardless of the meter being used.  I don't agree with you that just because two meters measure the same impedance in-circuit that it is a reliable measurement.

[tigr]

The only thing that the meter can change is the characteristic of the stimulus signal (voltage, current, frequency, and waveform)

That's what we're trying to find out.
Very good.