The 1250E Frequency Response Analyzer (FRA) delivers accurate measurement of gain and phase. The device under test is stimulated by a sinewave and the response analyzed at various points in the system. 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 then be used to provide the system transfer function.
This process rejects all harmonics and, by increasing the integration time to further reject noise and interference, even signals which are buried in noise can be measured accurately.
The 300 V range on the 1250E is particularly useful for making measurements on fuel cell stacks and high voltage batteries, used in hybrid vehicles and residential power supplies. Key product features include:
AC amplitude range - 10 mV to 10 V, for power supply testing
Analyzer range 30 mV - 300 V, i.e. suitable for ATS (Automated Test Systems), power station vibration testing
Noise rejection capability
Ability to analyze non-linear systems (harmonic analysis)
Synchronizer option enabling generator and carrier signals to be locked to external signals in terms of frequency / phase
Modulator / demodulator option for interfacing to AC carrier systems
Front panel or PC software control
Measurement of impedance has become an important tool in the study of electrochemical/biological phenomena and material properties.
The 1250E together with a potentiostat such as the 1287A potentiostat/galvanostat, can be used in a wide range of applications, including:-
Corrosion and inhibitor studies
Analysis of organic and inorganic coatings and films
Research into solid electrolytes for oxygen sensors/fuel cells
Development of novel anode/cathode materials and electrolytes
Bioanalytical research into plant/soil properties
When combined with a 1296A Dielectric Interface and temperature test equipment 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
Novel gas and liquid sensors
Characterization of ferro/piezoelectric and semiconductor materials
A standard use for a FRA is to generate a signal which is connected to a signal converter (this may take many forms; e.g. hydraulic, pneumatic or electrical), which forces controlled movement to take place (e.g. displacement transducers used in aerodynamic tests). These are placed on the system under test and the output signal fed back to the FRA via a sensor such as an accellerometer or displacement transducer, enabling the system to be characterized. Typical uses include:-
Automated test systems
Power supply testing
Aircraft instrumentation/system controls
Aerodynamic tests - study of applied forces to wing structures
Automotive shock absorbers
Weapons guidance systems
Rocket propulsion and vectoring technology
The synchronizer option enables the generator to be locked to a rotating / reciprocating component, and measurements can then be made relative to this. Applications include turbine analysis - using harmonics to enable blade crack detection.
Modulator / Demodulator:
This optional card allows the user to superimpose an external modulator signal onto the 1250E generator signal which acts as a carrier. This modulation signal can then be demodulated through the analyzer inputs. Applications include telecommunications and automated test systems.
Waveform: Sine, square or triangle
Amplitude: 10 mV to 10.23 V rms
Maximum AC resolution: 10 mV
DC Bias Range: ±10.23 V
Maximum DC resolution: 10 mV
Output impedance: 50 Ω ±1%
Maximum output current: ±100 mA peak
Frequency range: 10 µHz to 65 kHz
Maximum resolution: 10 µHz
Frequency Error: ±100 ppm
Stability: 24 hrs ±1 ºC, ±10 ppm
Sweep types: Frequency (logarithmic or linear), Amplitude (linear), DC bias (linear)
Maximum voltage hi to lo: ±46 V peak
Maximum voltage lo to ground: 150V peak
Maximum current: ±100 mA peak
Impedance lo to ground: 100 kΩ // 100 pF
Connectors: Rear BNC, floating shield
Protection: Output is short-circuit protected
Analyzers: Two independent analyzers operating in parallel.
Full Scale Peak Input
Common Mode Rejection
1 µV (90 dB)
10 µV (90 dB)
100 µV (90 dB)
1 mV (90 dB)
Please feel free to contact for detailed specifications, accessories, software and options.