E-36
ElektroPhysik
-
Use the SET-key to position the cursor to CAL .
-
Press CLEAR-key. The factor will be reset to
1.000. The asterisk (
*
) above the cursor will
disappear.
Note:
When pressing CLEAR-key, any reading will change
according to the current factor selection. Example:
2.6 µm changes to 2.0 µm.
10. Sensitivity (SENS)
The coulometric technique uses a controlled “de-plating”
current rate (i.ed.the time required to remove the plating
material) to determine the thickness of a coating. For
that reason, the duration of measurement and its exact
switch-off point must be exactly determined (see time-
voltage diagram in section 2.1 „General usage and
measuring principle“).
Your sensitivity setting determines the switch-off point.
If after switch-off the coating has not been completely
removed, GalvanoTest 3000 has switched off
prematurely and certain spots can be observed on the
de-plating area. To ensure a smooth and even de-plating
area, it is recommended to increase the test voltage.
E.g. for nickel it is recommeded to increase the test
voltage from 1.0 (default value) to 1.2 Volts. If the
instrument does not switch off in time, the substrate will
be etched by the solution. In this case, sensitivity should
be decreased (for nickel, e.g., decrease test voltage from
1.0 to 0.8 Volts).
10.1 Reset to default sensitivity
The instrument is factory adjusted so that a certain
sensitivity value (Volt) is preset for each different metal
selection. When changing sensitivity preset, an asterisk
(
*
) will appear above SENS. For resetting to default
sensitivity, please proceed as follows:
-
Use SET-key to position the cursor to SENS.
-
Press CLEAR-key. The sensitivity value U resets
to factory setting (default value). The asterisk (
*
)
above the cursor disappears. The sensitivity value
U is shown in Volts on the reading display.
Complete
removal of coating
Incomplete removal
with remaining spots
of coating
Etched
substrate