INFICON Protec P3000(XL) Helium Leak Detector - Manual (Page 32)

2-5
How the Protec P3000 Works
k
in
a
26
e Ch
ap
te
r
2
.fm
Tech
ni
ca
l Ha
nd
bo
ok
(1
20
9)
The LEDs offer some bundled light. The intentional starring suspends the lid closing
reflex and also the eyes do not move anymore which may lead to overheating of the
retina.
When looking into the LEDs „incidentally“ the eye is protected by the lid closing
reflex. Also the permanent movement of the eyes prevents overheating and
consequent damage of the retina.
2.3.3 Built-in PRO-Check reference leak
A built-in PRO-Check reference leak is available for all Protec P3000. The PRO-
Check reference leak can be used for verifying the correct functioning of the Protec
P3000 including the correct calibration and can also be used for re-calibrating the
Protec P3000 if necessary.
The PRO-Check reference leak is inserted in the front of the housing. Insertion of the
sniffer tip into the cone-shaped test leak opening is automatically detected via a light
barrier.
Warning
Do not stare into the LEDs of the sniffer line intentionally for extended times or at a
close distance as this may cause permanent damage to the eye.
Fig. 2-5 Built-in PRO-Check reference leak