ElektroPhysik
E-11
Please note:
The number of pores can be reset to Zero by pressing
CLR.
Please proceed as follows:
1.
Hold the high voltage probe by the metal grip to
prevent static charge.
2.
Switch on high voltage.
3.
Slowly sweep the test electrode in parallel rows
across the surface to be tested. Make sure to scan
over the complete surface to be tested. The
scanning speed should not exceed 40 cm/s ( 15,8
inches/s). For counting pores and fissures, the
test speed should be around 2-5 cm/s (0.8…2
inch).
4.
A spark discharge only occurs at the presence of
an interconnected pore or flaw. At the same time,
an alarm tone will sound and the red ring at the
high voltage probe will light up to indicate a pore
or flaw.
Please note:
-
Even if voltage supply is turned off, residual
voltage remains at the high voltage probe. The
red ring flashing indicates residual voltage. The
higher the flashing frequency, the higher the
residual voltage. Residual voltage is available until
the red light goes off.
-
Insufficient coating thickness or air bubbles will
not be detected.
-
Coatings containing metal particles or carbon
powder are electrically conductive. They are not
suitable for being tested with PoroTest® 7 since
such particles would result in spark discharges
and thus simulate porosity.
8.
Power supply
PoroTest® 7 is storage battery fed by four rechargeable
NiMH C-cells. The battery state is tested continuously
during operation. Erratic measurings due to low battery
do not occur. The battery state is indicated by the number
of bars appearing on the right display edge.
•
Battery symbol and four bars (fully charged) to
•
Battery symbol and zero bars (battery run down)
Testing procedure / Power supply
