Radiometer Analytical CTV101 Mode D'emploi page 5

The EDI101 electrode has a ground joint (NS 14.5/23) which fits a great
majority of measurement cells such as the Radiometer Analytical
corrosion cells and the MDE150 Polarographic Stand.
The electrical contact is ensured by brushes which rub a bush made of
phosphorous bronze. The background noise due to this contact is negligi-
ble irrespective of the electrode rotation speed.
The banana socket (3) is used for the connection of the working elec-
trode. This socket is removable, it holds the (3a) brush which ensures the
contact.
3a
Important : To ensure a good contact
When using the electrode for the first time, this contact (3a) must be run
in. Rotate the electrode at 3000 rpm for 20 minutes. Only remove the
contact if absolutely necessary. The contact must be run in each time
you remove socket (3), Fig. 1, for instance to replace it with a new one.
The gas inlet (4) is used for flushing the electrode bearings and contacts
with an inert gas (nitrogen, helium, etc.). This operation prevents these
vital parts from being damaged by any corroding or clogging agents.
The electrode active tip (6) is cylindrical and made of PTFE. The disc
(generally a metal or a glassy carbon disc) is centred on the bottom face
of the tip.
The disc diameter is 2 mm, 3 mm, 5 mm or 6 mm. Changing the type of
the disc (i.e. the type of working electrode) is a fast and easy operation:
unscrew the electrode tip and replace it with another one. A wide range of
discs is available as shown at the end of this manual.
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