eDAQ e-corder, Manual

Page: 42 / 112

38 eDAQ Potentiostats
You can now adjust the applied potential with the slider bar, or by
entering the exact potential with text entry. The resulting current signal
should obey Ohm’s law:
I = E/R
so that with a 10 Mohm test resistor, R, in place, an applied potential,
E, of 1 V should produce a current, I, of 100 nA, while other potential
settings should produce corresponding currents.
If the current signal does not obey Ohm’s law, then first recheck your
connections of the Dual Picostat to the
e-corder
, page 27 . Then check
with the second electrode cable. If the problem persists then it is
possible that the Dual Picostat itself needs repair. If one electrode cable
works well, but the second does not then it is likely you have a faulty
cable, replacements can be obtained from your eDAQ supplier.
If these tests indicate that the Dual Picostat is working correctly, but you
are still experiencing difficulties with your experiments, then you should
check the electrodes you are using, the connections to them, and the
design and condition of the reaction vessel, and any salt bridges that
you are using.