True RMS Measurement LCR Meters
Last Updated: April 1, 2025
Description
True RMS Measurement LCR Meters are sophisticated instruments designed to measure the inductance (L), capacitance (C), and resistance (R) of electronic components. These meters provide accurate readings by calculating the root mean square (RMS) value of AC signals, which is essential for precise impedance measurements. They are equipped to handle a wide range of frequencies and can measure complex impedance parameters, making them versatile tools in the field of electronics testing and development.
Working Principle
True RMS Measurement LCR Meters operate by applying either a constant voltage or current to the device under test and measuring the resultant current or voltage, respectively. This allows the meter to calculate the impedance of the component. The auto-balancing bridge technology used in some models, such as the R&S LCX, measures the AC voltage and current, including the phase shift, to determine the complex impedance at any operational point . True RMS meters are particularly useful because they provide accurate measurements of AC signals, which can vary in waveform and frequency, ensuring that engineers and technicians can rely on the data for precise analysis and decision-making.
Applications
True RMS Measurement LCR Meters are used in a variety of applications, including the measurement of equivalent series resistance (ESR) and equivalent series inductance (ESL) of electrolytic capacitors and DC-link capacitors . They are also employed in testing transformers and measuring DC resistance, making them invaluable in the development and testing of power electronics and other high-frequency applications.
Advantages over other LCR Meters
One of the key advantages of True RMS Measurement LCR Meters is their ability to provide accurate readings of AC signals with varying waveforms and frequencies. This is particularly beneficial when measuring components with impedance values that change at different frequencies and levels, as these meters can dynamically adjust the frequency, voltage, or current as the swept parameter . This capability ensures that the measurements are precise and reliable, even in complex testing scenarios.
Limitations
True RMS Measurement LCR Meters can face limitations when measuring very high or very low impedances. In such cases, the accuracy of the readings may be compromised because one of the signals (voltage or current) can become very small and difficult for the meter to detect accurately .
Considerations
When selecting a True RMS Measurement LCR Meter, several factors should be considered. Initial costs can vary depending on the features and capabilities of the meter. Operating expenses may include calibration and maintenance, which are necessary to ensure continued accuracy and reliability. Durability is another important consideration, as these meters are often used in demanding environments. Accuracy is paramount, especially for applications requiring precise impedance measurements. Finally, replacement and maintenance costs should be factored into the overall cost of ownership, as these can impact the long-term value of the instrument.
from Red Pitaya, d.o.o.
SDRlab 122-16 External clock is based on the SDRlab 122-16 model that is modified to be used with an external clock oscillator, which is important especially for RF applications that operate at other frequencies, require better quality clock or clock synchronization. [See More]
- Special Measurement Types: Max/Min or Peak spike measurement; Temp - RTD (optional feature); Temp - T/C (optional feature); True RMS Current Measurement
- Display Type: Webpage
- Form Factor: Clamp Meter (optional feature); Bench top; Rack mount (optional feature); Handheld (optional feature); Computer Board
- Display Digits: 3 Digits; 4 Digits; 5 Digits; 6 Digits
from Red Pitaya, d.o.o.
SDRlab 122-16 was developed specifically for software-defined radio and more demanding RF applications. [See More]
- Special Measurement Types: Max/Min or Peak spike measurement; Temp - RTD (optional feature); Temp - T/C (optional feature); True RMS Current Measurement
- Display Type: Webpage
- Form Factor: Clamp Meter (optional feature); Bench top; Rack mount (optional feature); Handheld (optional feature); Computer Board
- Display Digits: 3 Digits; 4 Digits; 5 Digits; 6 Digits
from Red Pitaya, d.o.o.
SIGNALlab 250-12 is most sophisticated Red Pitaya product, built for more demanding industrial applications and research, where robustness and performance matter more than cost. [See More]
- Special Measurement Types: Max/Min or Peak spike measurement; Temp - RTD (optional feature); Temp - T/C (optional feature); True RMS Current Measurement
- Display Type: Webpage
- Form Factor: Clamp Meter (optional feature); Bench top; Rack mount (optional feature); Handheld (optional feature); Computer Board
- Display Digits: 3 Digits; 4 Digits; 5 Digits; 6 Digits
from Red Pitaya, d.o.o.
STEMlab 125-14 4 Inputs is based on STEMlab 125-14 board, but instead of 2 inputs and 2 output channels offers 4 Input channels that with improved performance. [See More]
- Special Measurement Types: Max/Min or Peak spike measurement; Temp - RTD (optional feature); Temp - T/C (optional feature); True RMS Current Measurement
- Display Type: Webpage
- Form Factor: Clamp Meter (optional feature); Bench top; Rack mount (optional feature); Handheld (optional feature); Computer Board
- Display Digits: 3 Digits; 4 Digits; 5 Digits; 6 Digits
from Red Pitaya, d.o.o.
STEMlab 125-14 is our most versatile and popular product, which was introduced to the market in 2013 when Red Pitaya was established. Since then it has been used in a wide variety of contexts, from hobbyists and ham radio operators to industry, research, and space applications. [See More]
- Special Measurement Types: Max/Min or Peak spike measurement; Temp - RTD (optional feature); Temp - T/C (optional feature); True RMS Current Measurement
- Display Type: Webpage
- Form Factor: Clamp Meter (optional feature); Bench top; Rack mount (optional feature); Handheld (optional feature); Computer Board
- Display Digits: 3 Digits; 4 Digits; 5 Digits; 6 Digits
from Red Pitaya, d.o.o.
STEMlab 125-14 is our most versatile and popular product, which was introduced to the market in 2013 when Red Pitaya was established. Since then it has been used in wide variety of contexts, from hobbyists and ham radio operators to industry, research and space applications. [See More]
- Special Measurement Types: Max/Min or Peak spike measurement; Temp - RTD (optional feature); Temp - T/C (optional feature); True RMS Current Measurement
- Display Type: Webpage
- Form Factor: Clamp Meter (optional feature); Bench top; Rack mount (optional feature); Handheld (optional feature); Computer Board
- Display Digits: 3 Digits; 4 Digits; 5 Digits; 6 Digits
from Red Pitaya, d.o.o.
STEMlab 125-14 Edu Pack is based on Red Pitaya's best-selling DAQ platform and with the chosen accessories a perfect fit for educational purposes. [See More]
- Special Measurement Types: Max/Min or Peak spike measurement; Temp - RTD (optional feature); Temp - T/C (optional feature); True RMS Current Measurement
- Display Type: Webpage
- Form Factor: Clamp Meter (optional feature); Bench top; Rack mount (optional feature); Handheld (optional feature); Computer Board
- Display Digits: 3 Digits; 4 Digits; 5 Digits; 6 Digits
from Red Pitaya, d.o.o.
STEMlab 125-14 External clock is based on the STEMlab 125-14 model that is modified to be used with an external clock oscillator, which is important especially for RF applications that operate at other frequencies, require better quality clock or clock synchronization. With this modification, users... [See More]
- Special Measurement Types: Max/Min or Peak spike measurement; Temp - RTD (optional feature); Temp - T/C (optional feature); True RMS Current Measurement
- Display Type: Webpage
- Form Factor: Clamp Meter (optional feature); Bench top; Rack mount (optional feature); Handheld (optional feature); Computer Board
- Display Digits: 3 Digits; 4 Digits; 5 Digits; 6 Digits
from Red Pitaya, d.o.o.
Based on the STEMlab 125-14 Starter kit and it comes with individual ISO17025 certificate. [See More]
- Special Measurement Types: Max/Min or Peak spike measurement; Temp - RTD (optional feature); Temp - T/C (optional feature); True RMS Current Measurement
- Display Type: Webpage
- Form Factor: Clamp Meter (optional feature); Bench top; Rack mount (optional feature); Handheld (optional feature); Computer Board
- Display Digits: 3 Digits; 4 Digits; 5 Digits; 6 Digits
from Red Pitaya, d.o.o.
STEMlab 125-14 Low Noise Bare OEM is the ultimate solution for customization and adaptability in your electronic project. This board, which comes without the usual connectors, provides unparalleled freedom and versatility to tailor your designs according to your specific needs. [See More]
- Special Measurement Types: Max/Min or Peak spike measurement; Temp - RTD (optional feature); Temp - T/C (optional feature); True RMS Current Measurement
- Display Type: Webpage
- Form Factor: Clamp Meter (optional feature); Bench top; Rack mount (optional feature); Handheld (optional feature); Computer Board
- Display Digits: 3 Digits; 4 Digits; 5 Digits; 6 Digits
from Red Pitaya, d.o.o.
STEMlab 125-14 Low Noise is based on a STEMlab 125-14 board that is populated with additional linear analog power for analog power supplies to reduce RF inputs and outputs noise and consequently increase ENOB. [See More]
- Special Measurement Types: Max/Min or Peak spike measurement; Temp - RTD (optional feature); Temp - T/C (optional feature); True RMS Current Measurement
- Display Type: Webpage
- Form Factor: Clamp Meter (optional feature); Bench top; Rack mount (optional feature); Handheld (optional feature); Computer Board
- Display Digits: 3 Digits; 4 Digits; 5 Digits; 6 Digits
from Red Pitaya, d.o.o.
We are setting the industry standard in product quality and customer support, our STEMlab OEM boards are easy to integrate and available in multiple hardware and software configurations. [See More]
- Special Measurement Types: Max/Min or Peak spike measurement; Temp - RTD (optional feature); Temp - T/C (optional feature); True RMS Current Measurement
- Display Type: Webpage
- Form Factor: Clamp Meter (optional feature); Bench top; Rack mount (optional feature); Handheld (optional feature); Computer Board
- Display Digits: 3 Digits; 4 Digits; 5 Digits; 6 Digits
from Red Pitaya, d.o.o.
STEMlab 125-14 is our most versatile and popular product, which was introduced to the market in 2013 when Red Pitaya was established. Since then it has been used in wide variety of contexts, from hobbyists and ham radio operators to industry, research and space applications. [See More]
- Special Measurement Types: Max/Min or Peak spike measurement; Temp - RTD (optional feature); Temp - T/C (optional feature); True RMS Current Measurement
- Display Type: Webpage
- Form Factor: Clamp Meter (optional feature); Bench top; Rack mount (optional feature); Handheld (optional feature); Computer Board
- Display Digits: 3 Digits; 4 Digits; 5 Digits; 6 Digits
from Red Pitaya, d.o.o.
STEMlab 125-14 is our most versatile and popular product, which was introduced to the market in 2013 when Red Pitaya was established. Since then it has been used in wide variety of contexts, from hobbyists and ham radio operators to industry, research and space applications. [See More]
- Special Measurement Types: Max/Min or Peak spike measurement; Temp - RTD (optional feature); Temp - T/C (optional feature); True RMS Current Measurement
- Display Type: Webpage
- Form Factor: Clamp Meter (optional feature); Bench top; Rack mount (optional feature); Handheld (optional feature); Computer Board
- Display Digits: 3 Digits; 4 Digits; 5 Digits; 6 Digits
from Red Pitaya, d.o.o.
STEMlab 125-14 X-Channel System is designed for applications that require multi-channel RF signal acquisition and generation. It enables the user to stream analog and digital signals from/to the client's PC. X-Channel System consists of multiple STEMlab 125-14 devices that are modified and comes... [See More]
- Special Measurement Types: Max/Min or Peak spike measurement; Temp - RTD (optional feature); Temp - T/C (optional feature); True RMS Current Measurement
- Display Type: Webpage
- Form Factor: Clamp Meter (optional feature); Bench top; Rack mount (optional feature); Handheld (optional feature); Computer Board
- Display Digits: 3 Digits; 4 Digits; 5 Digits; 6 Digits
from Red Pitaya, d.o.o.
STEMlab 125-14Z7020 Low Noise is based on a STEMlab 125-14 Z7020 board that is populated with additional linear analog power for analog power supplies to reduce RF inputs and outputs noise and consequently increase ENOB. [See More]
- Special Measurement Types: Max/Min or Peak spike measurement; Temp - RTD (optional feature); Temp - T/C (optional feature); True RMS Current Measurement
- Display Type: Webpage
- Form Factor: Clamp Meter (optional feature); Bench top; Rack mount (optional feature); Handheld (optional feature); Computer Board
- Display Digits: 3 Digits; 4 Digits; 5 Digits; 6 Digits
from Red Pitaya, d.o.o.
STEMlab 125-14Z7020 Low Noise is based on a STEMlab 125-14 Z7020 board that is populated with additional linear analog power for analog power supplies to reduce RF inputs and outputs noise and consequently increase ENOB. [See More]
- Special Measurement Types: Max/Min or Peak spike measurement; Temp - RTD (optional feature); Temp - T/C (optional feature); True RMS Current Measurement
- Display Type: Webpage
- Form Factor: Clamp Meter (optional feature); Bench top; Rack mount (optional feature); Handheld (optional feature); Computer Board
- Display Digits: 3 Digits; 4 Digits; 5 Digits; 6 Digits