2 Novocontrol Technologies GmbH & Co. KG Top-class impedance analyzers with test interfaces for various applicationsReliable sample environment for various temperature ranges and pressure variationTurnkey Dielectric and Impedance SpectrometersSoftware for instrument control, automation, and data analysisSample cells for a large variety of applications
3 Principle of measurement Voltage Current harmonic base wave Fourier transform over n periodsPermittivityConductivityd electrode spacing, A electrode area
4 Impedance Measurement Requirements for Dielectric Measurements Broad frequency rangeWide impedance rangeSmall loss factors tan(d) = e’’ / e’ = Zs’ / Zs’’Sample is in first order approximation a capacitorCapacitive impedance Z = j / (wC) Relaxation usually adds small changes in Z DC conductivity adds parallel resistance
5 Parallel Representations: Same Voltage in Re, Im AdmittanceParallel Imp.Serial Representations: Same Current in Re, ImSerial Imp.Loss Factor
8 Impedance analyzer system highlights Broad frequency range 3 µHz MHz (> 13 decades)Ultra wide impedance range Ω (18 decades) covers range from conductors to best isolators in a single instrument set-upUltra wide capacity range F allows broadband measurement of smallest capacities down to 1 fF. High phase accuracy ( °) and loss factor tan(δ) absolute accuracy (3.10-5) for low loss dielectric materials and isolators broadband characterization.Supports non-linear Dielectric, Conductivity and Impedance Spectroscopy or gain phase measurements in combination with all test interfaces.
9 Measurement examples Alpha total impedance range Typical results covering 18 orders of magnitude dynamics
10 Impedance analyzer system highlights High speed measurements for online monitoring of time-dependent processes in the 5 ms range (with Option F)Automatic self calibration and diagnosis by user compensates long term internal drift and verifies functionality.Precision digital frequency response analyzer up to 40 MHz for two channel gain phase measurements with 0.001° phase - and 10-5 in amplitude resolution included. Operates like a broadband lockin amplifier with two channels, extended accuracy and frequency range.Optional control WinDETA software for turnkey calibration, operation, data evaluation, 2- and 3- dimensional graphical representation including non linear spectroscopy.
11 Alpha-A: impedance measurements up to 40 MHz Alpha-AT+ZG4RC network standard test sampleNew Alpha-A signal generatorImproved calibration procedures40 MHz also available for ZG2 and ZGSRC network measurement Alpha-AT+ZG4 now operates up to 40 MHz! Scanned copy to be inserted.
12 Higher harmonicsk = 1: first harmonic(or base wave)
13 HVB 4000: new high voltage test interface for the Alpha-A modular measurement system Dielectrics, semiconductors or electronic components at high AC and/or DC voltages fornon-linear dielectric / impedance spectroscopy;characterization of materials or components under stress;extremely high impedance samples exceeding 1014 Ω.Materials measurements: Novocontrol High Voltage Sample CellEarlier products: - HVB 300 (3 µHz to 1 MHz, 300 Vpp AC and/or DC) - HVB 1000 (3 µHz to 10 kHz, 1000 Vpp AC and/or DC)
14 HVB 4000: new high voltage test interface for the Alpha-A modular measurement system Frequency: 3 µHz kHz (9.5 decades) Impedance: 1kΩ .. 2·1015 Ω (12 decades) Capacitance: 1 fF F (13 decades) Loss factor tan(δ):AC signal out: 30 mV Vp, 2.7 mA max DC bias out: VDC VDC, mA max Output impedance: 750 kΩ Voltage in: max. ± 2000 Vp dc coupled
15 Electrochemical Impedance Measurements (EIS) Defined DC Voltage / Current referred to a third (differential) reference electrodePotentiostat/Galvanostat function for defined cell DC polarizationDC measurementSuperimposed AC voltage / current for impedance measurementClassical applications Interface polarization Intrinsic electrolyte conductivity RC Layer structuresPhase accuracy, impedance range not as critical as for dielectric measurements?Additional applications: Ion conductivity, relaxation, sensors, fuel cells
16 POT/GAL: electrochemical test interfaces for the Alpha-A modular measurement system Reliable impedance measurements up to 1 MHzVery wide impedance range: 10-4 W up to 1013 WVariable output resistanceSample protection:high-power counter electrode signal output supports fast voltage and current limiters independent of the main control loop. Both voltage and current limits continuously adjustable and operate simultaneously in both potentiostat and galvanostat mode.Two models: 30 V/2 A and 15 V/10 APOT/GAL advantages
17 POT/GAL: electrochemical test interfaces for the Alpha-A modular measurement system 4 channel 24 bit digitizer for simultaneous dc signal measurements of the counter-, two reference- and the working electrodes.High accuracy working electrode current input converter with reference technique for accurate measurement of both strong conductors and insulators.Non-linear EIS by higher harmonic measurements both on instrument and WinDETA application software level.POT/GAL advantages
18 POT/GAL: electrochemical test interfaces for the Alpha-A modular measurement system Automatic dc level shifters at the working and reference electrodes inputs compensate dc voltage and current offsets in order to accurately measure the small superimposed ac signals for EIS.Supports real-time measurements by up to 150 impedance data points / second (option) and voltage current data points / second in time domain mode.POT/GAL advantages
19 An important competitor: specification No high-impedance measurementsLimited phase and tan(d) resolutionLimited usability at f>10 kHzCompare specifications of 1287 and POT/GAL system here
20 POT/GAL: electrochemical test interfaces for the Alpha-A modular measurement system 4-wire impedance mode accuracyCompare specifications of 1287 and POT/GAL system here