Holiday Detector mod. 184-13-6KV
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Instruction for use
a) Holiday Detector Mod. 184 has been designed for the inspection, on the
production line, of the piping insulating coating.
b) The inspection is made connecting the grounding clamp to the back
bare end of the pipe section, before the bare front of pipe reaches the
inspection point that is made by a conductive brush connected to the
hot point that feels the whole coated pipe surface, discovering any
possible leaks in coating.
c) The unit generates High Voltage pulse discharges (up to 6000V per 10
microseconds) with a repetition frequency of about 20Hz (1 pulse every
50 milliseconds). That allows to inspect the whole coating surface by
means of thin brushes, at normal pipe translation speed in the
production line, minimizing operator risks.
d) Main switch (1) connects the unit to 230Vac – 50Hz network (switched-
on green lamp (7)), activating HV output and the Crest Voltmeter (3)
allowing real time reading of effectively present pulse voltage on
insulating coating independently from the load represented by it (mostly
capacitive).
e) Change-over switch (4) allows to select the voltage range most suitable
to the kind of coating under inspection, while the potentiometer (5)
allows the voltage fine adjustment between the interval of two steps.
f) Leak presence is noticed by the intervention of the piezoelectric by an
acoustic signal and from the red lamp lighting (6); in addition the leak
signal is also available for free double change-over operation for remote
signal transmission or ausiliar operations.
g) The intervention sensitivity of acoustic piezoelectric alarm is adjusted by
the potentiometer (2), working on the achievement of the alarm
intervention just in the moment of the discharge towards leak.
During the installation of the unit, it is important to note that the
capacitive kind with
a pole connected to ground, therefore, in order to avoid as useless as
undesired loads, it will be useful to connect as short as possible the hot point to the brush,
separating from the
ground or from grounded metallic structures, using the special HV
cable supplied with the unit.
January 2013 BR-184-13-6KV-ENG-00 Pag. 3 of 10
