Pstat.SetStability()

Type: INSTANCE FUNCTION

Purpose: Set the I/E converter stability for potentiostat mode.

There are four settings for stability:

with the most stable case being Slow.

The Fast value corresponds to no extra I/E converter filtering. The Medium value corresponds to a small I/E filter which enhances stability. The Slow value corresponds to a large I/E filter which removes 50/60 Hz mains noise in the lower current ranges.

While it would take an advanced course in amplifier design to completely understand the stability setting, we can offer you a few guidelines:

  1. Always leave the stability in Fast for galvanostatic operation.
  2. If the potentiostat is showing high-speed oscillation that depends on the current range in use, try increasing the Stability setting.
  3. If your curves are noisy at low currents, try setting Stability to Slow.
  4. If you are acquiring data faster than 0.2 seconds/point and see glitches when the current range changes, try decreasing the stability.

Usage: SetSwitch = Pstat.SetStability(Switch)

       
  Switch INDEX

0 = No IE filtering (Fast)

1 = very small filter (Medium Fast)

2 = small filter (Medium, Normal)

3 = large filter (Slow)

  SetSwitch INDEX The new setting.

Four constants have been set to make code reading easier. Located in the pstat.exp script, their names are:

StabilityFast 0
StabilityMedFast 1
StabilityNorm 2
StabilitySlow 3

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