Test Procedure - Elcometer 266 Manual Del Usuario

8 TEST PROCEDURE

8.1 TESTING IN A SINGLE LOCATION
1 Holding the high voltage probe handle
firmly, ensure that your fingers grasp
and squeeze the black rubberised grip
on the underside of the handle, as
shown (Figure 4).
2 With the probe in free air, press and
release the button on the handle to
switch on the high voltage. The red
light on the handle will illuminate and
the instrument will emit a regular
clicking, indicating that the probe is at
high voltage.
3 Place the probe on the test surface.
4 Keeping the probe in contact with the surface, move it over the
work area at a speed of approximately one metre every four
seconds, 0.25m/s (10"/s).
Any flaws in the coating will be indicated by one or more of the
following:
(a) A spark is seen between the probe
and the surface
(b) The blue light on the high voltage
handle flashes
(c) The alarm sounds
(d) The alarm icon is shown on the
display (a)
(e) The display backlight flashes
8.2 MOVING TO A NEW TEST LOCATION
If you need to test in more than one location:
1 Always switch off the instrument before disconnecting any cables.
2 After reattaching cables in the new test location and before you
recommence testing, repeat the steps given in Sections 7.3, 7.4
and 7.5 on page en-15.
c
The probe must always touch the surface. Gaps between the probe and the coating can result in genuine
flaws not being detected.
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c
R
Figure 4
a
en-16