Potentiostat working switchers and mode settings'

1
Default potentiostat form view.
Potentiostat working switchers and mode settings.
Potentiostat program control panel.
Steady state mode settings.
Calibration coefs load, calibrations form and
internal time reset buttons.
Real-time measured values of current and
potential.
Start/stop real-time measures displaying.
Displaying previously recorded data.
2
Device switchers.
Potentiostat / galvanostat modes switcher.
Sample electrode on / off switcher.
Open / close device.
Tip electrode on / off switcher.
Dummy resistor value or cell operation switcher.
Work frequency switcher.
Current range switcher.
3
Graph control.
Graph control toolbox. By means of this toolbox,
it is possible to zoom data, print, save as
bitmap or text file currently displayed data.
The list of possible graphs to display. There are
six dependencies available 1) sample
potential of time, 2) tip potential of time,
3) sample current of time, 4) tip current
of time, 5) sample current of sample
potential, 6) tip current of tip potential.
4
Steady state mode.
In this mode potentiostat stabilizes potential
or current at constant previously defined value.
This mode controls are situated at the right size
of the form. Controls are grouped in two groups
Steady state and Predefined values. In
potentiostat mode device supports constant
potential on sample and tip electrodes. In
galvanostat mode it support current at sample
electrode and potential at tip electrode.
Potentiostat / galvanostat mode switcher.
Sample and tip should be switched on by means of
these buttons.
Potential and voltage values should be set here.
If rapid values change is needed, these controls
should be used to set current and potential
values fast. Two predefined values are available.
They could be applied by pressing button with
green arrow. The destination is selected by means
of drop down list. The current or potential could
be increased or decreased on this value by
pressing the up and down arrow respectively.
5
Cycling mode.
In this mode potentiostat performs a saw like
sweep of current or potential on sample electrode
and potential on tip electrode. The cycling
object (sample or tip electrode) should be on for
cycling on it to be available.
Defining cycling object nothing, sample or tip.
Start / stop cycling.
Cycling lower and upper ranges.
Cycling speed.
6
Program mode.
In this mode device performs a number of
potential or current changes which are set
beforehand. The area of program editing consists
of a few pieces step parameters, cycling
parameters and program parameters. Program
consists of steps, each step could be sweep or
steady kind. Such parameters as initial and final
values, period, speed, values change from one
step instance to next one (if step repeat count
is more then one) and the same for period of step
should be defined for each program step.
Program performing control section. It is
possible to start, stop program, change current
step, manually change step repeat number.
Preview on graph and loading to device buttons.
For program preview to be visible on graph
displaying of measures should be disabled.
Number of step to edit.
Step parameters includes a few controls to
describe one step of the entire program. It
includes numerical step parameters, step repeat
count, frequency, current range, device mode and
sample mode.
Entire program parameters includes initial
potential/current value, steps count, total
program repeats count and the condition whether
or not sample electrode should be on or off after
program finish.
A piece of program could be cycled a few times.
If it is needed, it should be defined in this
section.
7
Periodical measures.
Potentiostat measures potential and current
values on sample and tip electrodes. In this area
of potentiostat control form the measures period
and graph points number to display could be set.
Also there is an ability to save all experimental
data to binary file. If a file is chosen, all
periodical measures are being saved to this file.
It could be convenient for long-time experiments,
even if it lasts month or more, no data would be
lost. And if chosen file is not empty it is
possible to view its content in graph section of
potentiostat control form, the place in file
file position should be set and graph type
selected to view the data required.
Measures period.
Graph points count.
Save file controls.
8
Device calibration.
Device calibration is a procedure of adjusting
the coefficients which are used to represent
measured values of potential and current,
checking the sweeps periods. The calibration
procedure is divided into six parts which follow
one by one and cycled into a loop. It is made
because user may choose any of these six parts to
start with, but they all should be performed to
ensure that the device is calibrated correctly.
All calibration coefs are located in CFC file. As
a default BiPot.cfc loads from INI directory
when the device is opened first time. But any
other calibrations file may be loaded manually.
Calibration step, save calibration coefs, load
calibration coefs.
Required absolute potential and resistance values
entering place.
Calibration stage choice.
Help image area. All wires should be connected
according to the current picture on this place.
It should be mentioned here, that all tip current
measures, calibrations and approach should be
done then potential is measured between tip and
Ex5, e.i. switcher on scheme should be in such
position