Gamry FlexCell, Руководство оператора

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Chapter 4: Routine Use of the Flexcell--Stirrer Installation
4 - 5
Electrical connections to the heating jacket are discussed in Chapter 5. The power applied to the heating jacket
is normally controlled using a Gamry Instruments TDC4 Temperature Controller. Consult its Operator
’ s Manual
for detailed information concerning its use.
Additional heating instructions and safety information are given later in this chapter.
Stirrer Installation
Stirring in the Flexcell is normally done using a stirrer inserted through the central port on the top of the cell.
Gamry Instruments offers several optional accessories useful in adding stirring capability to your cell.
P/N 990-00117 is a stirring-rod kit. It includes:
•
A precision glass stirring rod
•
A stirring paddle that attaches to the rod
• A bushing that guides the stirring rod through a 24/40 ground-glass port
If you are using the stirring-rod kit with your cell, install it after electrolyte has been added to the cell.
1) Note that the bottom end of the stirring rod is bent and has a glass disk on it. The other end of the
rod is the
“ top end. ”
2) Slide the stirring paddle from the top end of the glass stirring rod all the way to the bottom end.
3) Rotate the paddle so its long axis is parallel with the rod.
4) Poke the bottom end of the rod and the paddle through the central 24/40 standard taper port in the
glass dome.
5) Carefully push the paddle against the bottom of the cell to rotate the paddle to a position
perpendicular to the stirring rod.
6) Loosen the nut on the bushing (if necessary) and slide the bushing over the top of the stirring rod.
7) Push the bushing down the rod until the bushing seats in the port on top of the glass dome.
You can use the stirring rod kit with a variety of stirring motors. The details of connection to a stirring motor can
vary. Consult the manufacturer
’ s documentation for specific instructions for your motor and controller. Gamry
Instruments sells an optional stirrer-motor kit (P/M 990-00118) that allows precise control of the stirring
apparatus in the stirring-rod kit. More information can be found in Chapter 5.
Clamp the Flexcell to a sturdy ringstand whenever it is used with a stirrer.
You can remove the stirring rod assembly from the cell by reversing the steps above. Removal of the stirring rod
from the top of the cell with the paddle attached can be quite tricky. The paddle rotates quite easily, so it is
difficult to keep it aligned with the rod as you pull it from the cell. Be patient; we have found that with practice
this can be done.
If you find removal of the stirring rod too difficult, disassemble the cell with the stirring rod still in place, and
remove the stirring rod from the bottom of the cell.
Caution:
The bushing can overheat if the rotation speed exceeds 200 rpm.
Always keep the stirring rate lower than this maximum value.