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The Nyquist Diagram for Electrical Circuits

on 11.01.2017 at 07:10 by Mehdi on Blog of Mehdi Alem
Introduction The Nyquist diagram of a transfer function is a parametric plot of its imaginary part versus real part as the frequency sweeps in a certain range. When dealing with electric circuits, the transfer function is the immittance of the circuit, i.e. […]

Workshop on Nanomechanics – Montpellier, France

on 09.12.2016 at 11:24 by Romain Stomp on Blog of Romain Stomp
This workshop organized with CNRS customers in Montpellier among the RéMiSoL network (Réseau des Microscopies à Sondes Locales) focused on all aspects of contact mechanics at the nanoscale and in particular using resonant contact AFM mode (CR-AFM). Contact Resonance tracking measures the […]

Using the MFIA Impedance Analyzer to characterize the ESR of a Super-capacitor

on 01.11.2016 at 10:14 by Tim on Blog of Tim Ashworth
Introduction Super-capacitors are very useful devices providing power for applications ranging from SRAM to high-speed trains. The energy density is 10 – 100 times higher than that of standard (electrolytic) capacitors. And although they have a lower energy density than […]

Frequency Response Measurement with Chirps and Leakage-Free FFT

on 28.10.2016 at 16:08 by brunok on Blog of Bruno Küng
Introduction This post explains how to measure the frequency response of a component or system with high spectral resolution in a minimum amount of time. Rather than sweeping the frequency and recording each spectral point individually, the approach presented here is […]

LabOne Imaging: Software Trigger’s new Grid Mode

on 27.09.2016 at 11:32 by Daniel on Blog of Daniel Wright
An image obtained using SW Trigger's Grid Mode.
In LabOne Release 16.04 the Software Trigger receives a powerful extension, Grid Mode, which organises the triggered data in a 2-D matrix allowing image construction direct from LabOne. This blog explains how this new functionality works and describes its most […]

Low Noise Digitizer und Lock-in Verstärker

on 29.07.2016 at 13:27 by Marco Brunner on Blog of Marco Brunner
Zurich Instruments setzt mit der Digitizer Option für den MFLI Lock-in Verstärker einen neuen Meilenstein bei Messungen im mittleren und niedrigen Frequenzbereich. Strom- und Spannungssignale werden mit einer Abtastrate von 60 MSa/s und einer Signalbandbreite von 7 MHz digitalisiert. Aussergewöhnlich […]

Working with LabOne Software Trigger Data in Matlab

on 18.04.2016 at 10:42 by Daniel on Blog of Daniel Wright
LabOne’s Software (SW) Trigger allows the user to save bursts of instrument signals (e.g. its demodulator samples or a PID controller’s error value) when a specified trigger condition is met. The SW Trigger works much in the same way as […]

Better Amplitude Accuracy with MFLI Analog Adder

on 07.03.2016 at 17:47 by brunok on Blog of Bruno Küng
Many lock-in applications use a drive signal consisting of a small AC excitation voltage and larger DC offset voltage, for example differential conductance (dI/dV) measurements. Users of the MFLI Lock-in amplifier have the choice between two methods to generate such a signal: […]

LabOne for HF2: using digital lines as trigger sources

on 03.02.2016 at 11:39 by Romain Stomp on Blog of Romain Stomp
Trigger accuracy
Since LabOne 15.11 release and onward, accessible from our download area, all HF2LI users with the enabled HF2LI-WEB option can now benefit from the latest software developments that were previously reserved for the UHFLI. One tool that is now totally new for this […]

LabOne Software Trigger as a tool for multichannel mapping applications

on 25.11.2015 at 13:27 by Romain Stomp on Blog of Romain Stomp
First R
In earlier blogs, we presented several methods to synchronize data acquisition with third party instruments, either via the DIO input as a Hardware trigger (TTL pulse), some gated triggering scheme for pass/fail analysis or to capture only transient phenomena in a longer […]

Permittivity Measurement with HF2IS Impedance Spectroscope

on 17.11.2015 at 12:47 by James Wei on Blog of James Wei
Introduction Dielectric spectroscopy is a form of impedance spectroscopy where the dielectric properties i.e. permittivity of a medium is characterized as a function of frequency. This technique allows us to evaluate the energy storage and dissipation properties of a capacitor […]

Eddy Current Testing with MFLI Lock-In Amplifier

on 05.08.2015 at 12:07 by Marco Brunner on Blog of Marco Brunner
This blog describes a method to detect material defects. Eddy current measurements are used for non-destructive material testing (NDT). An alternating magnetic field is penetrating a sample. The material defect is detected by a phase shift. In the first part […]

Optimizing PLL Performance with the PID Advisor and Auto Tune

on 27.07.2015 at 13:48 by brunok on Blog of Bruno Küng
Comparison of measured and simulated step response
Introduction LabOne provides two tools that save time and improve performance for anybody working with the UHF-PID controller: The PID Advisor and the Auto Tune feature. They allow automation of the feedback parameter tuning required to achieve the best PID (proportional-integral-derivative) controller performance. In […]

Achieving High Data Transfer Rates with the UHFLI

on 07.07.2015 at 16:42 by brunok on Blog of Bruno Küng
Introduction The UHFLI Lock-in amplifier features the smallest time constant on the market, making it an excellent instrument for fast measurements like in imaging applications. The UHFLI can provide demodulated data at a bandwidth of up to 5.2 MHz and sampled at up […]

Characterization of Dye-Sensitized Solar Cell Impedance at Low Frequencies with HF2IS Impedance Spectroscope

on 03.07.2015 at 12:29 by James Wei on Blog of James Wei
Co-author and main contributor: Dr. Antonio Braga Introduction The electrical impedance spectroscopy (EIS) technique is used to characterize the physical-chemical processes of the dye-sensitized solar cells (DSSC) using different types of metal oxides semiconductors, dyes or electrolytes [1]. The EIS […]