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M470 - SVP

secm 470 150x150

This enables the user to map and quantify localised electrochemical and corrosion events in real time.

The probe vibration is controlled by a piezo-ceramic displacement device allowing vibration amplitudes from 1 – 30 μm (perpendicular to the sample surface).

It is an ac technique, thus, high system sensitivity can be achieved via a differential electrometer in conjunction with a lock-in amplifier.

The SVP470 vibrating probe provides increased electrical sensitivity as well as enhanced system stability. The 3300 potentiostat is an option that offers a fully integrated suite of dc corrosion experiments and can be used to bias the potential of the sample.

M470 is available with a choice of potentiostat/galvanostat/FRAs: in place of the 3300, which is built-in the M470, the SP-300 can now be used with the M470.

 

  • Specifications

  • Options

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SVP Electronics

  • Signal chain:
    Phase sensitive detection using microprocessor controlled lock-in amplifier with digital dual phase oscillator and differential electrometer input.
  • Lock-in amplifier
    Software controllable gain range (1 – 105).
    Output time constant: 0.1, 1, 10 s
  • Differential electrometer
    1015 Ohms input impedance.
    Decade gain ranges: 0 to 80 dB.
    Common mode range: ±12 V
  • Vibration actuator
    One dimensional low voltage
    piezo-electric actuator
  • Vibration amplitude
    Software set from 1 – 30 μm
    perpendicular to sample surface
  • Electrochemical sensitivity
    Better than 5 μA/cm²
    (using standard PIS test approach)

Positioning system specifications

Stepper Motors

  • Scan Range (x,y,z): 110 mm x 110 mm x 110 mm
  • Minimal step size on all axes: 20 nm
  • Closed loop positioning linear zero hysteresis encoder with direct real-time readout of displacement in x, y and z
  • Linear position encoder resolution: 20 nm.
  • Max. scan speed: 10 mm/s
  • Measurement resolution: 32-bit decoder @ up to 40 MHz

Piezoelectric element (for z axis only)

  • Vibration range 20 nm – 2 µm peak to peak with 1 nm increments
  • Min. vibration resolution: 0.12 nm calculated (16-bit DAC on 4 µm)
  • Piezo crystal extension: 100 µm
  • Positioning resolution: 0.09 nm calculated (20-bit DAC on 100 µm)

SP-300 + M470