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1250E - Frequency Response Analyzer

The 1250E Frequency Response Analyzer has a 300V range for fuel cell cells and high voltage batteries



  • Wide frequency range from 65 kHz to 10 µHz
  • Sine, square, triangle Voltage generator up to 10 V RMS and ± 10.22 V DC
  • Two (2) channels of simultaneous voltage measurement at 500 V peak
  • Capable of harmonic analysis
  • Impedance range from 100 mOhm to 100 TOhm, with the 1296A dielectric interface
  • Capable of performing DC potentiostatic and galvanostatic experiments with the 1287A electrochemical interface


Applications and Software


The 1250E Frequency Response Analyzer (FRA) provides accurate measurement of gain and phase. The device under test is stimulated by a sine wave and the response analyzed at various points in the system._cc781905 -5cde-3194-bb3b-136bad5cf58d_These responses are then correlated with the stimulus to determine the amplitude and phase relative to the generator. The ratio of the two measured signals can be used to provide the function system transfer.

This process rejects all harmonics, and by increasing the integration time to further reject noise and interference, even signals that are buried in noise can be accurately measured.

The 1250E's 300V range is particularly useful for making measurements on high-voltage fuel cell stacks and batteries, used in hybrid vehicles and residential power supplies. Key product features include:  


  • AC amplitude range - 10 mV to 10 V, for power supply test
  • Analyzer range 30 mV - 300 V, i.e. suitable for ATS (Automated Test Systems), power plant vibration tests
  • Noise rejection capability
  • Ability to analyze non-linear systems (harmonic analysis)
  • Front panel or PC software control


Impedance measurement has become an important tool in the study of electrochemical/biological phenomena and material properties.
The 1250E, in conjunction with a potentiostat such as the 1287A Potentiostat/Galvanostat, can be used in a wide range of applications, including:


  • Corrosion studies and inhibitors
  • Analysis of organic and inorganic coatings and films.
  • Solid Electrolyte Research for Oxygen Sensors/Fuel Cells
  • Development of new anode/cathode materials and electrolytes
  • Bioanalytical investigation of plant/soil properties


materials test
When combined with a 1296A dielectric interface and temperature test set, the 1250E can be used to test a wide range of materials, such as:


  • supercapacitor/battery/fuel cell materials
  • Charge transport in semiconductors, organic crystals, ceramics, etc.
  • Analysis of chemical reactions, polymerization and curing processes
  • New gas and liquid sensors
  • Characterization of ferro/piezoelectric and semiconductor materials


Control systems
A standard use for an FRA is to generate a signal that is connected to a signal converter (this can take many forms, eg hydraulic, pneumatic or electrical), which forces controlled motion to occur (eg pressure transducers). displacement used in aerodynamic tests). These are placed in the system under test and the output signal is fed back to the FRA through a sensor such as an accelerometer or a displacement transducer, allowing to characterize the system. Typical uses include: 


  • Automated test systems
  • Power supply tests
  • Aircraft Instrumentation/System Controls
  • Aerodynamic tests - study of forces applied to wing structures
  • car shock absorbers
  • weapon guidance systems
  • Vectoring and rocket propulsion technology
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