Metrohm 894 Professional CVS - Manual (Page 30)

3.2 Equipping the RDE measuring head
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894 Professional CVS
5
CAUTION
If the measuring head arm is lowered carelessly, this may result in
injuries to the hand.
Make sure that you do not trap a finger between the measuring
head arm and the instrument housing.
Lower the measuring head arm again.
CAUTION
The measuring head insert (see Figure 5, page 14) is made of PTFE. Do
not use sharp objects around it in order not to damage the material.
3.2.1 Preparing electrodes and inserting them in the RDE measuring
head
The 894 Professional CVS uses the potentiostatic three-electrode principle.
The following electrodes are used:
￭ Rotating disk electrode (RDE) as working electrode (WE)
￭ Reference electrode (RE)
￭ Auxiliary electrode (AE)
NOTE
Please also observe the notes contained in the electrode leaflets sup-
plied with the electrodes. In addition, you can learn how to best handle
the electrodes from the multimedia guide (A7170001).
3.2.1.1 Working electrode (WE)
The working electrode consists of the following two articles:
￭ Electrode tip (e.g. 6.1204.610)
￭ Driving axle for rotating disk electrode (RDE) (e.g. 6.1204.510)
Preparing and inserting the working electrode
Proceed as follows:
1 Preparing the electrode tip
Remove the protective cap from the electrode tip.