ElektroPhysik
E-31
8.5 Chromed zinc coatings
Before placing the measuring cell, remove any
passivation layers that may have built-up on the sample.
This is done best with a rubber pencil or with
ElektroPhysik solution PE1.
Put some solution in the measuring cell and leave for a
few seconds. Then pump out the PE1 solution, rinse
the measuring cell with distilled water and proceed as
described under section 4.2.
-
After measurement switches off, cautiously
remove the inner measuring cell making sure not
to change the positon of the outer measuring cell
on the sample.
-
Pump the used electrolyte solution into a separa-
te bottle.
-
Rinse the inner and outer measruing cells twice
using distilled water.
-
Move the cursor under METAL on the
alphanumeric display (3) to adjust the next mate-
rial to be measured.
-
Fill fresh electrolyte solution into the inner
measuring cell and lauch measurement for the
next smaller measuring area.
Notes:
To ensure optimum use of the electrolyte and maximum
ease of operation it is recommeded to use a set of several
inner measuring cells.
In general it is not necessary to lift the measuring cell
from the sample between the individual measurements.
If, however, electrically insulating material has built-up
on the sample it is necessary to lift the measuring cell in
Measuring area B
(4mm²)
Measuring area C
(1mm²)
order to remove such deposits. Then use the next smaller
measuring area for the next measurement.