eDAQ Picostat, User Manual

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80 eDAQ Potentiostats
With highly resistive loads, using a large range setting with a small
(close to zero) current can produce unexpected large potential signals
because of small offsets in the current control circuitry. If you require
very small currents always use a small range setting as well, this will
ensure a minimum offset error. For example, to apply a current of only
25 nA use the 100 nA range setting for best results.
Chart software on Macintosh
Galvanostat mode of operation is accessed by choosing the Potentiostat
command in the Channel Function pop-up menu to open the control
window. Turn on the Galvanostat and Dummy radio buttons,
Figure
5–20 .
When in Galvanostat mode, the current and potential signals will be
reversed from normal (potentiostatic) operation. That is, the ‘I Out’
The four Galvanostat current range settings in
this menu, are dependent on the
e-corder
Output Voltage range, Table 5–1
Select the expected range
for the potential signal
Potential signal
display area
(Galvanostat mode)
Select galvanostat
operation
Select Potentiostat in
the Channel menu
Set
applied
current
Figure 5–20
Setting up the
Potentiostat as a
Galvanostat (Macintosh).