POT/GAL 15V 10A and 30V 2A
Test Interfaces for Electrochemical Impedance, Dielectric, Conductivity, 2, 3 and 4 Electrode Spectroscopy and Gain Phase Measurements with Potentiostat, Galvanostat for Alpha-A Modular Measurement System
The POT/GAL 15V 10A and 30V 2A extension test interfaces for the Alpha-A modular measurement system feature high quality electrochemical impedance spectroscopy EIS, conductivity and dielectric spectroscopy with 2, 3 and 4 electrodes and gain phase measurements.
For electrochemical applications, fast potentiostat and galvanostat control loops for defined dc voltage and current cell polarization control are included. These can be superimposed by an ac signal for EIS.
Like all other Alpha-A test interfaces, the POT/GAL interfaces feature high overall performance like, e.g., broad bandwidth, ultra-wide impedance range and highest accuracy which now becomes available for EIS applications, too, The POT/GAL interfaces are thus a major improvement in EIS instrumentation.
In addition to EIS, typical electrochemical experiments like cyclic voltammetry and DC measurements in the time domain are supported.
The POT/GAL interfaces are not only optimized for low impedance samples with strong electrode sample interface polarization effects but accurately measure high impedance insulators, too. The interfaces are particularly recommended for the characterization of
The POT/GAL interfaces include high voltage and current output signal amplitudes up to ±15 Vp, ±10 Ap or ±30 Vp, ±2 Ap both for dc and ac signals.
For applications which do not require potentiostat or galvanostat control, a direct voltage mode is available. In this mode, the POT/GAL interfaces can be used for general purpose dielectric, conductivity and impedance spectroscopy with extended output signal amplitude range, too.
3 electrode arrangements are
the standard for electrochemical
measurements with potentiostat control. In addition, 3 or 4 electrode
techniques can be advantageously used in order to partly compensate
electrode - sample interface polarization or contact impedance effects.
In order to reduce the capacity of the cables that connect the voltage inputs to the voltage electrodes, the two voltage inputs support driven shield technology which keeps the potential of the outer coaxial cable shield at nearly the same potential as the sensitive inner cable conductor.