M470 – SVP
- 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
- 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
- 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)
In situ measurement of the localised electrochemical activity.
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.