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IV Impedance > Dielectric Impedance Analyzer

 

 

Novocontrol specialises in Dielectric Impedance measurements, analysers are available in various frequency ranges & configurations. Sample cell and analysers allow measurement from 10e-2 to 10e14 ohms without changing the hardware configuration. Wide frequency range 3 µHz to 20 MHz & 3 µHz to 3GHz, Heating / Cooling, High temperature Cell & Furnace with automatic software, frequency sweep at predetermined temperature and temperature ramping makes it unique choice for material scientists.

 

Alpha - Diectric Impedence anaylyzer, 2 wire, 3 µHz to 20 MHz

Alpha Single Unit Analyzer

The Alpha analyzer features high quality general purpose dielectric, conductivity, impedance 2 electrode spectroscopy and gain phase measurements.

Both analyzers combine a high class precision broadband dielectric material characterization system with a typical impedance analyzer for the low and middle impedance range. This combination makes them unique and easy to use instruments with exceptional overall performance.

The Beta and Alpha analyzers cover 16 orders of magnitude impedance range, 12,5 orders of magnitude frequency range and 1m° basic phase accuracy in a single instrument. This combination makes them powerful tools for electric analysis instrumentation. As a result, the analyzers can measure the permittivity, conductivity and impedance of nearly all materials or components broadband and over a wide temperature range without changing sample geometry or sample cells.

3 or 4 electrode techniques can be advantageously used in order to partly compensate electrode - sample interface polarization or contact impedance effects.

The Beta analyzer voltage channel input impedance is 1012Ω | 10 pF which exceeds the range of most competing instruments by several orders of magnitude and therefore can be seen as a major improvement in broadband 3 and 4 electrode measurements.

The Beta and Alpha analyzers are predecessors and economical alternatives to the more powerful and flexible modular Alpha-A series, which can be extended by a series of test interfaces, which is not possible for the Beta and Alpha series. A more detailed comparison of the three series can be found here.

Features

  • Broad frequency range 3.10-5 .. 2.107 Hz including low frequencies for characterization of dielectric relaxations, electrochemical and high impedance effects.
  • Ultra wide impedance range 10-2 .. 1014 Ω (16 decades) covers range from conductors to best isolators.
  • Ultra wide capacity range 10-15 .. 1 F allows broadband measurement of smallest capacities down to 1 fF.
  • High phase and loss factor tan(δ) absolute accuracy (0.002 ° and 3.10-5, respectively) for low loss dielectric materials and isolators broadband characterization.
  • Single integrated device operated by high level GPIB commands for easy and straightforward implementation in own programs or existing measurement set-ups. No additional customized software, frequency response analyzer, lockin amplifier or interface required.
  • Automatic self calibration and diagnosis by user cancels out long term internal drift and verifies functionality.
  • Higher harmonics measurement over full frequency range for impedance and gain phase measurements for non linear electric response in materials or signals.
  • 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.
  • Optional control WinDETA software for turnkey calibration, operation, data evaluation, 2- and 3- dimensional graphical representation.

Alpha + Beta Short Specification

Ranges

Frequency 

3 µHz ... 20 MHz (12.5 decades)  *
3 µHz ... 40 MHz in gain phase mode for types Alpha-T and Beta-T

Impedance

0.01 .. 1014 Ω (16 decades)  

Capacitance  

1 fF ... 1 F (15 decades)  

Loss factor tan(δ)

10-5 .. 104

AC signal out

100 µV .. 3 Vrms

DC bias out

-40 VDC .. +40 VDC, 
70 mA max **

Signal generator output
impedance

50 Ω

Voltage in

< ± 4.3 Vp dc or ac coupled

Differential Voltage Inputs (Beta only)

Input impedance

1012 Ω | 10 pF

Common Mode
Rejection

< 10-4 below 100 kHz
< 10-3 dB below 1 MHz

Input Bias Current

< 2.10-12 A

Basic Accuracy

Relative Impedance, 
Relative Capacity,
Loss factor tan(δ) 

< 3.10-5 ***

   Phase Angle

< 2 m° ***

Resolution

Relative Impedance, 
Relative Capacity,
Loss factor tan(δ) 

< 10-5  

Phase Angle

< 0.6 m°

User Calibrations

load, short, open, internal self calibration and diagnostics

Interface 

GPIB / IEEE488  

Software  

WinDETA data acquisition software with online graphics

* in combination with the types Alpha-N, Alpha-T or Beta-N, Beta-T
** requires dc bias option B
*** for details refer to specification charts

Alpha and Beta Analyzer Types
The following types with different frequency ranges are available.

Types

Type Code

Upper frequency limit 
40 MHz in gain phase mode, 
20 MHz in impedance mode


Alpha-T or Beta-T

Upper frequency limit 20 MHz

Alpha-N or Beta-N

Upper frequency limit 3 MHz

Alpha-K or Beta-K

Upper frequency limit 0.3 MHz

Alpha-L or Beta-L

Alpha and Beta Analyzer Options
The following mainframe options are available.

Option

Additional Type Code Letter

Dc bias ± 40V, 70mA

B if installed, missing else

 

Beta - Diectric Impedence anaylyzer, 4 wire, 3 µHz to 20 MHz

Beta Single Unit Analyzer

The Beta analyzer has the same functionality of Alpha Analyzer, but supports 3 and 4 electrode configurations in addition.

Both analyzers combine a high class precision broadband dielectric material characterization system with a typical impedance analyzer for the low and middle impedance range. This combination makes them unique and easy to use instruments with exceptional overall performance.

The Beta and Alpha analyzers cover 16 orders of magnitude impedance range, 12,5 orders of magnitude frequency range and 1m° basic phase accuracy in a single instrument. This combination makes them powerful tools for electric analysis instrumentation. As a result, the analyzers can measure the permittivity, conductivity and impedance of nearly all materials or components broadband and over a wide temperature range without changing sample geometry or sample cells.

3 or 4 electrode techniques can be advantageously used in order to partly compensate electrode - sample interface polarization or contact impedance effects.

The Beta analyzer voltage channel input impedance is 1012Ω | 10 pF which exceeds the range of most competing instruments by several orders of magnitude and therefore can be seen as a major improvement in broadband 3 and 4 electrode measurements.

The Beta and Alpha analyzers are predecessors and economical alternatives to the more powerful and flexible modular Alpha-A series, which can be extended by a series of test interfaces, which is not possible for the Beta and Alpha series. A more detailed comparison of the three series can be found here.

Features

  • Broad frequency range 3.10-5 .. 2.107 Hz including low frequencies for characterization of dielectric relaxations, electrochemical and high impedance effects.
  • Ultra wide impedance range 10-2 .. 1014 Ω (16 decades) covers range from conductors to best isolators.
  • Ultra wide capacity range 10-15 .. 1 F allows broadband measurement of smallest capacities down to 1 fF.
  • High phase and loss factor tan(δ) absolute accuracy (0.002 ° and 3.10-5, respectively) for low loss dielectric materials and isolators broadband characterization.
  • Single integrated device operated by high level GPIB commands for easy and straightforward implementation in own programs or existing measurement set-ups. No additional customized software, frequency response analyzer, lockin amplifier or interface required.
  • Automatic self calibration and diagnosis by user cancels out long term internal drift and verifies functionality.
  • Higher harmonics measurement over full frequency range for impedance and gain phase measurements for non linear electric response in materials or signals.
  • 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.
  • Optional control WinDETA software for turnkey calibration, operation, data evaluation, 2- and 3- dimensional graphical representation.

 

Alpha + Beta Short Specification

Ranges

Frequency 

3 µHz ... 20 MHz (12.5 decades)  *
3 µHz ... 40 MHz in gain phase mode for types Alpha-T and Beta-T

Impedance

0.01 .. 1014 Ω (16 decades)  

Capacitance  

1 fF ... 1 F (15 decades)  

Loss factor tan(δ)

10-5 .. 104

AC signal out

100 µV .. 3 Vrms

DC bias out

-40 VDC .. +40 VDC, 
70 mA max **

Signal generator output
impedance

50 Ω

Voltage in

< ± 4.3 Vp dc or ac coupled

Differential Voltage Inputs (Beta only)

Input impedance

1012 Ω | 10 pF

Common Mode
Rejection

< 10-4 below 100 kHz
< 10-3 dB below 1 MHz

Input Bias Current

< 2.10-12 A

Basic Accuracy

Relative Impedance, 
Relative Capacity,
Loss factor tan(δ) 

< 3.10-5 ***

   Phase Angle

< 2 m° ***

Resolution

Relative Impedance, 
Relative Capacity,
Loss factor tan(δ) 

< 10-5  

Phase Angle

< 0.6 m°

User Calibrations

load, short, open, internal self calibration and diagnostics

Interface 

GPIB / IEEE488  

Software  

WinDETA data acquisition software with online graphics

* in combination with the types Alpha-N, Alpha-T or Beta-N, Beta-T
** requires dc bias option B
*** for details refer to specification charts

Alpha and Beta Analyzer Types
The following types with different frequency ranges are available.

Types

Type Code

Upper frequency limit 
40 MHz in gain phase mode, 
20 MHz in impedance mode


Alpha-T or Beta-T

Upper frequency limit 20 MHz

Alpha-N or Beta-N

Upper frequency limit 3 MHz

Alpha-K or Beta-K

Upper frequency limit 0.3 MHz

Alpha-L or Beta-L

Alpha and Beta Analyzer Options
The following mainframe options are available.

Option

Additional Type Code Letter

Dc bias ± 40V, 70mA

B if installed, missing else

BDS 40 - Alpha / Beta + Sample Cell + Software

BDS Turnkey Dielectric / Impedance Spectrometers without Temperature Control

BDS 40

This is our high end system for the frequency range from 3 μHz - 20 MHz (12.5 decades) based on the Alpha-A modular measurement system for dielectric, conductivity, electrochemical and impedance spectroscopy with several test interfaces.

The sample impedance is directly determined by the phase-sensitive measurement of the sample voltage and current at fixed frequency.

In combination with the ZGS active sample cell interface, the standard sample arrangement is a parallel plate capacitor with diameters from 40 mm to 10 mm and a spacing between the plates from 20 mm to 10 μm.

For liquid samples, a vacuum sealed sample cell is offered, which prevents evaporation of sample material.

Short Specification (applies at the sample)
Frequency 3·10-5 .. 2.107 Hz
Capacity 10-15 .. 1 F
Impedance 0.01 - 1014 Ω
Loss factor tan(δ) accuracy < 3·10-5, resolution 10-5

System includes Alpha-ANB mainframe with ZGS active sample cell interface, shielding unit, WinIMP software and data acquisition unit.

 

Concept 40 - BDS 40 & Heating / Cooling - 160 to 400 Degree C

Concept Turnkey Dielectric, Conductivity and Impedance Spectrometers with Temperature Control

Concept systems are based on BDS systems and extend them by one of our temperature control systems. Systems are turn key rack mounted.

All systems include an Alpha-A mainframe in combination with an ZGS active sample cell interface or an Alpha single unit analyzer and or a RF impedance analyzer, software package WinDeta, WinTemp, WinPlot and WinFit, data acquisition unit, temperature control system Quatro or Novocool or Novotherm and complete set of electrical cables and vacuum lines. All system are turn key mounted in a rack, the data acquisition unit is mounted in a computer trolley.

Concept 40

are based on the corresponding BDS systems in combination with the QUATRO Cryosystem.

Frequency range 3uHz to 20MHz
Temperature range -160 ... 400 °C
Temperature stability ±0.01 °C

System mounted in 19'' cabinet.

Concept 80 - Alpha + Aglient E4991A (3 Mhz to 3 Ghz) Heating / Cooling - 160 to 400 Degree C

Concept Turnkey Dielectric, Conductivity and Impedance Spectrometers with Temperature Control

Concept systems are based on BDS systems and extend them by one of our temperature control systems. Systems are turn key rack mounted.

All systems include an Alpha-A mainframe in combination with an ZGS active sample cell interface or an Alpha single unit analyzer and or a RF impedance analyzer, software package WinDeta, WinTemp, WinPlot and WinFit, data acquisition unit, temperature control system Quatro or Novocool or Novotherm and complete set of electrical cables and vacuum lines. All system are turn key mounted in a rack, the data acquisition unit is mounted in a computer trolley.

Concept 80

are based on the corresponding BDS systems in combination with the QUATRO Cryosystem.

Frequency range 3uHz to 3GHz
Temperature range -160 ... 400 °C
Temperature stability ±0.01 °C

System mounted in 19'' cabinet.
System includes RF Extension.

High Temperature - Furanace & sample cell upto 1600 Degree C

Novotherm-HT

Novotherm-HT is a series of turn key high temperature control system up to 1600 °C including a sample cell for dielectric, conductivity and impedance measurements under controlled atmosphere or vacuum.

The frequency range covered by the sample cell is dc .. 1 MHz and operation with the Alpha, Beta and Alpha-A analyzers and all test interfaces except ZGS and G22 is recommended.

The Novotherm-HT systems were designed for easy, safe and fully automatic operation enabling computer controlled experiments over several days without supervision as required for low frequency measurements.

Features

  • Turn key temperature control system including temperature controller, oven and 19" mounting rack.
  • Sample cell for high temperature tests under controlled atmosphere conditions like e.g. vacuum, inert gas, reactive gas, pH2O, etc included.
  • Crucibles for melting glass.
  • Recommended for operation in combination with WinDETA control software via RS-232 serial port and Alpha, Beta and Alpha-A analyzers and all test interfaces except ZGS and G22.
  • Application examples:
    Permittivity and conductivity measurements vs T, pH2O, etc;
    Fuel cell components testing;
    Sensor testing;
    Electrode kinetics;
    Electrochemical pumping, gas permeation and electrocatalysis with gas analysis (e.g. GC or MS) on outlets;
    Determination of the ionic transport numbers of membranes.

Available systems

Novotherm-HT 1200 20 .. 1200 °C
Novotherm-HT 1400 20 .. 1400 °C
Novotherm-HT 1600 20 .. 1600 °C

Principle of operation

The high temperature sample cell is immersed into and heated by an oven. The sample temperature is measured by thermo elements within the sample cell and the oven. A two channel cascade digital temperature controller applies the appropriate power to the oven in order to mach the sample temperature to the intended value or follow a temperature ramp. In combination with the WinDETA control software arbitrary time temperature profiles can be programmed.

The sample cell is hermetically sealed from the surroundings and can be filled with any gas of interest or evacuated. Electrode connections are established in 2, 3 or 4 wire arrangement. For the 2 wire arrangement the, standard parallel plate electrodes with 16 mm diameter and spacing up to 2 mm are used. In addition several sets of wire and bar electrodes are available as accessories. The cell electrodes are connected by BNC terminals to the impedance analyzer.

 

 

 

 

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