Starting of the molecular and
turbomolecular pumps
Restarting
after stop
Please
wait 5
s
between stop and restart, in order to be
sure
that the
synchronism
information is given to the leak
detector
and the display
does not lock at 99 %.
(It only
concerns
the
detectors
equipped with the
P
0326
converter
b
o
a
r
d
)
If you have this problem, stop the leak
detector
and wait 5
s
before
starting again
(concern
only leak
detectors
equipped with the P0326
convertor board).
Starting in the
cold state
First
start up
after delivery
There
is a risk that the
turbomolecular
pump does not start if the
ball
bearings
temperature
is below 5 °C. In order to be at the ambient
temperature,
6
hours
are
necessary
to the ball bearings.
That’s
why, if you start a leak
detector
which was outside during
a
cold period (in a car or in its delivery package by example), it is
possible there is starting problem during 2 or 3 hours. Don’t be
worried ! You
must
just waiting that the leak
detector
would be at
ambient temperature.
We have just
seen previously
that the
temperature
has an effect on
the starting of turbo pumps.
The
first start after delivery is even more
critical as the grease stay a few days in the
same
position, and even
is going between the balls of the bearing on the roller way in bigger
quantity that expected
because
of the
transport’s
vibration.
That
explain
some
non start up of the
turbomolecular
pump at the first
start up. In this case it is not abnormal to have to power on the leak
detector several times
(10 max) with 15
s
between a power off and
a
power on, to start up the
turbomolecular
pump.
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