Alcatel ASM Graph, ASM Graph D, ASM D, ASM 142 User Manual
ASM 142
/
142
D
ASM
GRAPH
HELIUM LEAK DETECTOR
/
GRAPH
D
/
GRAPH D+
User’s
Manual
Gb 02834
-
Edition
04
-
Feb
08
Alcatel Vacuum Technology,
Lucent
Group, has been supplying
helium and hydrogen leak detection
plasma sensors, vacuum measurement for severa
as
part of the Alcatel-
vacuum pumps,
systems
,
l
years.
Thanks
company
multiple
&
Alcatel Vacuum
Adixen, i
to its
complete range of products, the
has
become an essential player in
a
pplications : inst
D
eve
lopement, industry
rumentation, Research
and semic
Technology has
ts new brand name, in recognition o
onductors
launched
.
f
the company’s international standing in vacuum
sit
ion.
po
ISO
With both
Frenc
the
in
the high
h company
service
est
9001 and 14001 certifications,
is
an acknowlegded expert
and support, and
quality and
Adixen products have
environmental standards.
With 45
presence,
a whole host
and agents
The first step was
P
roducts
years
Fre
In Europe, AVTF-France hea
Alcatel
Technology
Benelux (Netherlands), Alcatel Vacuum Systems (Italy
and more recently Adixen Sensistor
2007)
etw
n
In Asia,
Vacuum Technology (Japan),
with Al
Vacuum
Technology Singapore, Alcatel Vacuum Technolog
Sha
This
epresensatives based
r
Thus,
produ
specialists in
years
of
experience, AVT
through its
of
experienced subsidiaries, dist
international network that includes
today
has a w
.
the founding of Alcatel Vacuum
(Hingham- MA)
ago,
mont
(CA)
reinforced
and
Tempe (AZ)
in the United States, t
today by 2 others
.
US subsidiaries
dquarters and its subs
Hochvakuumtechnik (Germany),
Alcatel Vacuum
UK (Scotland), Alcatel Vacuum Technolog
AB
in Sweden (in
form the foundation for the European partner
ork.
our
presence starte
d in 1993 with Alcatel
and has been strengthene
catel
Vacuum Technology Korea (in 1995),
Technology Taiwan (in 2001),
nghai
(China) (in
organization
2004).
is
rounded off by more than 40
in a variety
whatever the circumstances, the
cts
can
always
rely on quick support of our
of continents
Alcatel Vacuum
users
Vacuum Technology.
orldwid
ributor
hirty
in
idiaries
Alcatel
.
of Adixen
e
s
,
y
)
d
y
A very wide range of helium leak
GB 00204 -
Edition
05 -
September
06
detectors
Dear customer,
You have just bought an
Adixen leak detector.
We would like to thank you
and we are proud to count
you among our customers.
This
product is a result of
the experience acquired
over 35 years by Alcatel
Vacuum
Technology France
in vacuum and leak
detection technology.
The applications of helium
leak testing are extremely
diversified ranging from
high-tech
installation
maintenance to highspeed testing of industrial
products.
Each product of the Adixen
detector range is designed
to meet the specific needs
of each application:
•
portability,
•
high sensitivity,
•
pumping capacity,
•
pumping type,
•
automation and
integration in an industrial
process.
1/2
A very wide range of helium leak
GB 00204 -
Edition
05 -
September
06
detectors
This
product
complies
with the
requirements
of
European
Directives,
listed in the Declaration of Conformity contained in G100 of this
manual.
(E.C.
The
in German,
These Directives
Marking).
Declaration of Conformity and
Spanish,
are
Italian,
amended
by
Directive
Safety Instructions
Portuguese, Dutch
93/68/E.E.C
are available
and Danish
languages at the end of this manual.
Copyright/Intellectual property:
The use
property rights in force in any jurisdiction.
All rights
any part without prior written authorization from Alcatel Vacuum
T
echnology
of Adixen
reserved,
France.
products
are
subject
including copying this
to copyright and intellectual
document
in whole or
Specifications
by from Alcatel
2/2
and information are
Vacuum Technology
subject
France.
to
change
without notice
M
anual reference
: 107817
ASM GRAPH D+: L0114
v3.1 r
.02
General
contents
ASM
142 -
ASM
142 D
D
ASM GRAPH
D+
User’s
Manual
GB 00205 -
Edition
07 - March 09
e
dition
:
07 - March 2009
Software version:
ASM
142/ASM GRAPH
L
0088
v3.1 r
ASM
142 D/ASM GRAPH D/
Alcatel Vacuum Technology France - User’s
:
.02
Preliminary
remarks
Chapter
Chapter B
Chapter C
ASM GRAPH - ASM GRAPH
Throughout
“Summary of screen
User’s
A
Manual ASM
Manual.
A 100 - Introduction
A 200
A 201
A 202
A 300
A 400
A 401
A 500
A 600
A 700
A 800
A 801
A 900
A 901
B
100 - Safety instructions
B
110 - Unpacking - Storage - T
B
200 - Neutral gas purge and inlet vent connection
B
201 - Neutral gas purge installation (accessory)
B
210 - Connecting the
B
211 - Connecting the
B
300 - Controlling the
B
310 - Controlling the
B
320 - Connecting the
B
400 - Before
C
100 - Factory
C
110 - Operating principle of the control panel
C
120 - Setting
C
130 - Access
C
140 - Summary
C
200 - Starting up / Switching off the leak detector
C
210 - How to
C
211 - Operation of the leak detector
C
300 - Calibration of the leak detector
C
301 - Basic
C
302 - Advanced internal calibration of the leak detector
C
303 - External
C
304 - Correction factor
C
305 - Calibrated leak
C
306 - Adaptor for calibrated leak in sniffing mode
C
400 - Remote
C
410 - Headphone and loudspeaker
C
430 - 3
C
440 - Control panel with graphic interface
C
450 - Long
this
User’s
Please
-
ASM 142 - Detector
-
ASM 142 D - Detector
-
ASM 142 Graph D+ - Detector
-
Analyzer cell operating principle
-
Testing
methods
-
About Helium and Hydrogen
-
Operator interface: control panel
-
Options
-
Accessories
-
ASM 142 - T
-
ASM 142 D - ASM Graph D+ - T
-
Dimensions
-
Dimensions
starting up the leak detector
and
to level
internal calibration of the leak detector
masses
distance sniffer probe and Helium spray gun
142/142
D - ASM
Manual, you could find this type of message
C
140”: it
read it for further information.
to the ASM 142 series
operating principle
operating principle
operating principle
echnical
ASM Graph D+
configuration of the leak
maintenance
of screens
use
the leak detector: 2 methods
calibration of the leak detector
control
option
characteristics
echnical
ransportation
detector
detector
detector
detector
detector
to the installation
to the installation: ASM graph D+
with the I/O interface
with a
PC computer
directly to a printer or another device
detector
part
presentation
4
-
Password
values
programming
GRAPH/GRAPH D/GRAPH
refers
to a specific chapter of the
INTRODUCTION
characteristics
through the
parameters
of the control panel
D+
RS
232 interface
INSTALLA
OPERA
TION
TION
1/3
M
anual reference
: 107817
ASM GRAPH D+: L0114
v3.1 r
.02
General
contents
ASM
142 -
ASM
142 D
D
ASM GRAPH
D+
User’s
Manual
GB 00205 -
Edition
07 - March 09
e
dition
:
07 - March 2009
Software version:
ASM
142/ASM GRAPH
L
0088
v3.1 r
ASM
142 D/ASM GRAPH D/
2/3
:
.02
Chapter
Chapter E
Chapitre F
ASM GRAPH - ASM GRAPH
C
500 - Inlet vent
C
510 - Bargraph zoom
C
520 - Audio alarm/Digital voice
C
530 - Cycle end
C
540 - Zero function
C
550 - Memo function
C
560 - Helium pollution prevention
C
570 - Date - Time - Language - Unit
C
580 - Fault / information indicator and display
D
D 100 - T
D 200
D 300
D 300/D 400
D 400
able of
preventive maintenance
-
Maintenance message
-
General
-
Symptoms
troubleshooting
-
General
description
E
100 - Maintenance operations introduction
E
110 - ASM 142 / ASM 142
E
111 - ASM 142 D - ASM Graph D+ - Access
E
120 - Sending the leak detection for reparation to a
E
400 - Basic maintenance
E
530 - Valves
E
560 - Replacement
E
600 - Remote
E
610 - Long
E
710 - Primary
E
730 - Starting of the
E
740 - Greasing
E
750 - Primary
F
000 - Spare
F
001 - AVTF Customer Service
F
100 - T
F
200 - Monitoring and display
F
300 - Power and electrical supply
F
400 - Automatic control
F
500 - Measurement
F
600 - ASM 142 - Pumping
F
600 - ASM 142 D - Pumping
F
700 - Valves
F
800 - ASM 142 - Pipes - Connections - Seals
F
800 - ASM 142 D - Pipes - Connections - Seals
F
900 - Cover
F
1000 - Options - Accessories
F
1100 - Pictures
Alcatel Vacuum Technology France - User’s
installation and maintenance
of the internal calibrated leak
control
distance sniffer probe and Helium spray gun
pump
maintenance (AMD1)
molecular
molecular
pump maintenance
parts instructions
ools
of components
guide
troubleshooting
S -
Access
of the analyzer cell
and
turbomolecular
and
turbomolecular
of use
Offer
system
and
electronic
Manual ASM
MAINTENANCE - TROUBLESHOOTING
intervals
guide/Symptoms description
MAINTENANCE
to internal components
to the internal components
service
center
pumps
pumps
SHEETS
COMPONENTS
circuits
142/142
D - ASM
GRAPH/GRAPH D/GRAPH
D+
M
anual reference
: 107817
ASM GRAPH D+: L0114
v3.1 r
.02
General
contents
ASM
142 -
ASM
142 D
D
ASM GRAPH
D+
User’s
Manual
GB 00205 -
Edition
07 - March 09
e
dition
:
07 - March 2009
Software version:
ASM
142/ASM GRAPH
L
0088
v3.1 r
ASM
142 D/ASM GRAPH D/
Alcatel Vacuum Technology France - User’s
:
.02
Chapter
ASM GRAPH - ASM GRAPH
G APPENDIX
G 100 - Declaration of
G 200
-
ASM 142 - Wiring
G 201
-
ASM 142 D - Wiring
G 300
-
Analog
G 400
-
Long
distance sniffer probe
G 500
-
Helium spray gun
G 600
-
Safety
G 800
- Tools
Indicates
confor
mity
output
questionnaire
diagrams
user manual
diagrams
user
manual
a potentially hazardous situation which, if not avoided,
could result in property damage.
CAUTION
CAUTION
Indicates
could result immoderate or minor injury. It may also be
against unsafe practices.
Indicates
could result in death or
a potentially hazardous situation which, if not avoided,
used
to alert
a potentially hazardous situation which, if not avoided,
severe
injury.
Indicated an imminently hazardous situation that, if not avoided,
W
ARNING
Manual ASM
will result in death or
142/142
D - ASM
GRAPH/GRAPH D/GRAPH
severe
injury
(extreme
D+
situations).
3/3
Introduction
A
ASM
GRAPH
- ASM
GRAPH
D
GB 00206 -
Edition
03 -
June
08
Preliminary
remarks
ASM 142 - ASM 142 D
ASM
GRAPH
D+
Detailed contents
Throughout
“Summary of screen
User’s
this
Manual.
User’s
Please
Manual, you could find this type of message
read it for further information.
C
140”: it
User’s
refers
to a specific chapter of the
Manual
A 100
-
A 200 ASM 142 -
A 201 ASM 142 D -
A 202 ASM 142 Graph D+ -
A
300
A
400
A 401 About Helium and hydrogen
A 500 Operator interface : control panel
A new generation of Adixen helium leak detector
-
Vacuum
-
Stand-by
-
Roughing
-
Gross leak
-
Normal
-
Sniffing
-
Vacuum
-
Stand-by
-
Roughing
-
Gross leak
-
Normal
-
Sniffing
-
Vacuum
-
Stand-by
-
Roughing
-
Gross leak
-
Normal
-
Sniffing
-
Description
-
Design and manufacture
-
Overview
-
Helium
-
Spray method (inboard testing)
-
Sniffer method (outboard testing)
-
Bombing method
-
Helium
-
Helium and leak detection: which purity?
-
Hydrogen
circuit
mode
mode
test
mode
test
mode
test
mode
circuit
mode
mode
test
mode
test
mode
test
mode
circuit
mode
mode
test
mode
test
mode
test
mode
concentration
and signal displayed
Introduction
Detector
Detector
Detector
Analyzer cell
to the ASM 142 series
operating principle
operating principle
operating principle
operating
principle
T
esting methods
1/2
Introduction
A
ASM
GRAPH
- ASM
GRAPH
D
GB 00206 -
Edition
03 -
June
08
ASM 142 - ASM 142 D
ASM
GRAPH
Detailed
D+
contents
User’s
Manual
A 600 Options
-
Which options for which model?
-
Metal
seals
-
Inlet port
-
Units
-
Languages
-
3 masses
-
Automatic
-
Roughing system
-
Interface
-
Remote
- Test
-
Stainless steel
-
Control panel with graphic interface
-
Control panel racks
-
Sniffing
-
Cables
test
chambers
board
control cable length
of gas
line
cover
lengths
(UCT)
A 700
-
Which
-
-
-
-
- Transport
-
-
-
-
-
-
-
-
-
- Test
-
-
-
-
-
-
-
-
-
accessories
Remote
control
Long Distance
10 m/30 feet
Headphone
cart
Foot pedal for cycle
Calibrated Helium leaks
Calibration
Spray probe
Inlet adaptor
Printer
Inlet filters
Short
distance sniffer probe (to be
Bombing chamber
chambers
Neutral gas vent line kit
4 swiveling
Covered sniffer probe and
Bottle
handle for cart
Built-in
mini-printer
2005 IS
Pressure measurement
Ventilation
Bottle
Pump
Kit
handle for cart
for which model?
Sniffer probe
LDS
extension
connector
command
accessory
wheels
kit (Ø125 mm)
kit
(1.5 m/5 feet)
connected
remote
control kit
to the inlet part of a leak detector)
Accessories
A 800 ASM 142 - Technical characteristics
2/2
A 801 ASM 142 D - ASM Graph D+ - Technical characteristics
A 900
A 901
Dimensions
Dimensions
- ASM Graph D+
A
100
x
GB 00207
-
Edition 04
- June
08
A new generation
Adixen helium
Model photographed:
ASM
142
of
leak
detector
Introduction to the ASM 142 series
The
ASM
142/142 D/142
ASM
Graph D+ are
performance standards
These detectors
utilizing the
make them
high
performances, such
a roughing capacity of 7 CFM
(60 l/mn) with a usable helium
sensitivity
sec range.
high
a dry roughing capacity of 0.9
CFM
helium sensitivity
atm.cc/sec
a
in the
10
auto-zero
with two
for the operation of the unit,
the
parameters).
operator in his daily
(auto-calibration,
helium
...).
very rugged
field-proven components,
makes
environment.
reinforce
product (remote control,
probe).
totally dry leak detector.
specific to sniffing
applications.
graphic interface.
in the
performances, such
(1.5 m3/h) with a usable
range.
usable helium sensitivity
-7
atm.cc/sec
function).
comprehensive
distinct
other
for
evolved features
signal direct readout,
it ideal for any industrial
various accessories
the
We
your
are the
latest electronics technologies
a truly
-11
10
in the 10
range (with
control panel
areas (one
entering
to assist
operation
auto-zero,
design, based on
versatility
suggest
detector
complete
universal helium
universal
as,
atm.cc/
as,
-11
the
test
the
which
to
of the
sniffer
test mode
that you read this manual before you start to use
satisfaction.
S/ASM Graph/ASM Graph
leak
detectors
for
multi-purpose
end-result
of an
unit.
innovative engineering
and
unit:
ASM
142
x
x
x
x
x
to obtain optimum
ASM
Graph
ASM
142 D
x
x
x
x
x
x
levels
which
vacuum concepts,
ASM
Graph
x
x
x
x
x
x
of
performance
D/
set
new
approach
which
ASM
D
142 S
x
x
x
x
x
x
x
x
x
x
x
x
ASM
Graph
D+
x
x
x
x
x
x
x
and
1/1
A
200
ASM 142 detector operating principle
GB 00208
-
Edition 03
- June
08
Vacuum
circuit
1
2
V
T3
18
V
C
V
T2
V
S
8
4
3
VA1 7
R1 VR2
V
5
15
VT1
Bacosol
Minisol valves
valve
Reference correspondence between valve/vacuum block marks
1 Preamplifier
2 Analyzer cell
3
Detector
inlet port
4 Internal calibrated leak
5 Inlet
pressure
gauge
7 Vent connector
Long
8
15
18
distance sniffer connector
Roughing
primary pump
Detection molecular
(RVP
20 0)
pump (AMP
007I)
A1 Inlet vent valve (6 points)
V
R1
V
R2
V
T1
V
T2
V
T3
V
V
S
Sniffing valve (9 points)
V
C
Calibration valve (7 points)
Roughing
Roughing
Exhaust
Detection
Detection
valve ( point)
valve (2 points)
valve (3 points)
valve (4 points)
valve (5 points)
E
530
/4
A
200
ASM 142 detector operating principle
GB 00208
-
Edition 03
- June
08
(Patm
Stand-by mode
Roughing
mode
to 10 mbar inlet
18
1
2
3
VA1 7
V
T1
15
3
pressure)
2/4
15
5
V
R1
VR2
A
200
ASM 142 detector operating principle
GB 00208
-
Edition 03
- June
08
Gross
leak
test
(10 mbar to
5x10
inlet
-1
pressure)
mode
mbar
1
2
18
3
VR1
VR2
5
VT1
15
V
3
T3
1
2
Normal
(lower than
5x10
test
-1
mode
mbar
18
VT1
VT2
5
inlet
pressure)
15
3/4
A
200
ASM 142 detector operating principle
GB 00208
-
Edition 03
- June
08
Sniffing
test
mode
1
3
2
VA1
7
18
8 V
S
4/4
VT1
15
A
201
ASM 142 D detector operating principle
GB 01476
-
Edition 03
- June
08
2
Analyzer cell
V
Roughing
valve (1 point)
3
Detector
inlet port
V
Roughing
valve (2 points)
4
Internal calibrated leak
V
Exhaust
valve (3 points)
V
Detection
valve (4 points)
Vent connector
V
Detection
valve (5 points)
8
Long
distance sniffer connector
V
Sniffing valve (9 points)
10
Outlet pump connector
V
Calibration valve (7 points)
15
Roughing
pump (AMD1)
16
Roughing molecular
pump
18
Detection molecular pump (AMP
007I)
Vacuum
circuit
18
8
V
S
1
2
V
T3
V
C
4
V
T2
VT1
3
VA1 7
V
R1
5
VR2
15
10 12
16
Bacosol
valve
Minisol valves
Reference correspondence between valve/vacuum block marks
E
530
Preamplifier
1
Inlet
Purge
(MDP
pressure
filter
5006 HDS)
5
7
12
gauge
V
A1
R1
R2
T1
T2
T3
S
C
Inlet vent valve (6 points)
1/4
A
201
ASM 142 D detector operating principle
GB 01476
-
Edition 03
- June
08
Stand-by mode
1
2
18
V
T1
3
VA1 7
(Patm
Roughing
mode
to 10 mbar inlet
16
pressure)
16
15
15
3
5
V
R1
VR2
2/4
A
201
ASM 142 D detector operating principle
GB 01476
-
Edition 03
- June
08
18
1
2
V
T1
VR1 VR2
3
5
Gross
leak
test
mode
(10 mbar to
5x10
-1
mbar
inlet pressure)
16
1
2
V
T2
15
3
18
test
Normal
mode
(lower than
-1
5x10
inlet
mbar
pressure)
16
V
T1
T3
V
15
5
3/4
A
201
ASM 142 D detector operating principle
GB 01476
-
Edition 03
- June
08
Sniffing
4/4
test
mode
1
2
18
V
S
8
V
T1
16
15
3
VA1 7
A
202
principle
GB 03710
-
Edition 01
- June
08
2
Analyzer cell
V
Roughing
valve (1 point)
Detector
inlet port
Roughing
valve (2 points)
4
Internal calibrated leak
V
Exhaust
valve (3 points)
5
Inlet
pressure
gauge
V
Detection
valve (4 points)
Sniffing valve (9 points)
10
Outlet pump connector
V
Calibration valve (7 points)
12
Purge
filter
15
Roughing
primary pump
(ACP 15)
Detection molecular pump (AMP
007I)
ASM 142 Graph D+ detector operating
Vacuum
circuit
18
8
10 12
V
S
1
2
V
T3
V
C
4
V
T2
VT1
15
16
Reference correspondence between valve/vacuum block marks
3
VA1 7
R1
V
5
VR2
Bacosol
valve
Minisol valves
E
530
Preamplifier
1
3
Vent connector
7
Long
8
16
18
distance sniffer connector
Roughing molecular
(MDP
5006 HDS)
pump
V
A1
R1
V
R2
T1
T2
V
T3
V
S
C
Inlet vent valve (6 points)
Detection
valve (5 points)
1/4
A
202
principle
GB 03710
-
Edition 01
- June
08
ASM 142 Graph D+ detector operating
Stand-by mode
1
2
18
V
T1
Roughing
(Inlet pressure:
mode
Patm
16
15
to 10 mbar)
16
2/4
15
3
VA1 7
3
5
V
R1
VR2
A
202
principle
GB 03710
-
Edition 01
- June
08
5
ASM 142 Graph D+ detector operating
18
16
18
16
1
1
2
V
T1
2
V
T1
3
VR1 VR2
15
3
V
T2
V
T3
15
5
3/4
Gross
leak
(Inlet
test
pressure:
10 mbar to
5x10
-1
mode
mbar)
Normal
(Inlet pressure:
than 5x10
test mode
lower
-1
mbar)
A
202
principle
GB 03710
-
Edition 01
- June
08
ASM 142 Graph D+ detector operating
Sniffing
4/4
test
mode
1
2
18
V
S
8
V
T1
16
15
3
VA1 7
A
300
Analyzer cell
operating principle
GB
00007
-
Edition 03
-
September
04
Description
The
analyzer
cell works on the principle of mass spectrometry and is
set to the mass of helium (m/e =
4).
m/e
= atomic mass of the
ionization
particle/number
of electrons lost
on
The principle of magnetic deflexion spectrometry is as follows. The
neutral molecules of the gas being
chamber
beam
(or source of ions) where they are
generated
by
a heated
molecules are transformed into
analyzed
tungsten filament. A
ions.
pass into an
bombarded
large
ionization
by an
electron
number of the
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He
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6
Leak Signal
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Analyzer cell
-
functional
diagram
1/3
A
300
Analyzer cell
operating principle
GB
00007
-
Edition 03
-
September
04
Description (continued)
These ionized particles are
accelerated
by an electrical
field.
The entire
property of deflecting the trajectories of the ions along different
according
to their
different masses, is divided into several
only ions with the same
separated
ions (N2+ or
analyzer
to the masses of those ions (to be more
m/e
ratios). Thus the ions
cell is subject to a magnetic field which has
precised, according
beam,
m/e
ratio. The helium ions (m/e = 4)
which
beams,
contained
each
from the lighter (H2+ or H1+, smaller beams) or
O2+,
small
beams).
ions with
containing
heavier
the
curves
are
Because there is a constant magnetic field
accelerator
= 4) follow
electrical field is adjusted so that the helium ions
a pre-determined
trajectory (passing through
and arrive on the target at the input to
(permanent
a
direct current
magnet),
(m/e
diaphragms)
amplifier.
the
The current of helium ions is
helium in the installation and by measuring it we can find the flow
rate of the leak that has been
proportional
detected.
to the partial pressure of
It
is essential that the total pressure in the
-4
10
mbar, so that the trajectories of the electrons and the ions are
disturbed by residual
Around
-3
10
mbar there is a risk of
molecules.
analyzer
damaging
cell is less
the
heated filament.
than
not
In order to
«stray ions», an electrode located in front of the target
the
secondary
«braking electrode».
separate
ions with low
the helium ions from «noise» caused by
eliminates
energies.
This electrode is called
the
There is an auxiliary electrode at the top of the cell,
a
plate, which collects the ions that are heavier than helium. This
electrode thus
measures
electrode serves as the plate for
«triode
2/3
electrode».
the total pressure in the
a
triode
gauge,
shaped like
analyzer.
This
hence its name of
A
300
Analyzer cell
operating principle
GB
00007
-
Edition 03
-
September
04
Design
manufacture
and
Great care has been taken with the design and manufacture of
the cell in order to
and to achieve excellent stability:
– the metal parts are made of stainless
– the filament holder is made of
– there is an integral
repeatedly
amplifier.
obtain the same
steel,
machined aluminium,
characteristics
The cell assembly is
a
vacuum
–
– an optic holder
a permanent magnet,
–
amplifier.
– an
chamber
composed of:
or deflection
flange,
chamber,
•
The vacuum
The analysis cell vacuum
hollow with
(that are installed on the «optics holder» flange) are
chamber:
a rectangular opening
chamber
is made of light alloy.
into which the
electrodes,
placed.
It
is
•
The optics holder
The optics holder flange supports all the electrodes and
connections in the cell. They
– the sealed power supply socket, mounted on
– the amplifier, mounted on an elastomer
vthe supporting block which screens the target and on which
source of ions is
– the source of ions, which is made up of 2
• a
filament
•
an ionization
and a mass ion emitter.
holder,
flange:
mounted,
chamber
include:
with a stainless steel electron
gasket,
par
a
ts:
metal
electrical
gasket,
the
collector
The filament holder
with respect to the ionization
mechanically
chamber.
positions the tungsten filament
The electron collector and the filament have been
and positioned so that the
stabilizes at
filament. The cell is thus
the pieces being tested without the need of any special
system.
400°C
under
temperature
bombardment
rendered
of the electron
and
immune to
designed
collector
radiation
contamination
from
heating
the
from
3/3
A
400
T
esting methods
GB
00008
-
Edition 05
-
February
02
Over
view
Leak detection is used to detect
micro-openings,
parts. The detection of these cracks involves the use of
gas, which is
capable
of infiltrating the smallest leak quickly: Helium.
porosities, etc. in test
a
light
tracer
The detector samples and measures the helium flow rate entering
test part via the
leak(s).
the
The testing method is selected
measurement accuracy required:
no
The part can be
connected to
The part is
sealed
an evacuation line
yes
Its
characteristics
allow it to
evacuated
be
yes
10
-1
mbar.
SPRAY
laeak rate
to
locating the
method
measurement
l/s
and possibility of
leak.
from
10
-10
no
Minimum
mbar.l/s
the
Its
characteristics
allow it to
pressurized
or
a
mixture
helium
SNIFFING
detectable
and possibility of
leak.
with helium
containing
yes
method
leak of
be
locating
according
-6
10
to the test part and
Its
characteristics
allow it to be
in
a vacuum
vessel
BOMBING
The sensitivity is limited by
internal dead
well as on the bombing time and
pressurization value.
Global test without possible
of the
leak.
volume of the part
the
placed
yes
method
the
location
as
the
1/4
A
400
T
esting methods
GB
00008
-
Edition 05
-
February
02
Helium
and signal
(inboard testing)
2/4
concentration
displayed
Spray
method
Response time
In
leak
accordance
detection,
to the He
the signal
concentration
displayed
will
rate in the gas used for
change.
Example: signal
100
(with
% He in the gas
Signal
displayed
on the leak
This involves removing air from the test part,
analyzer
detector
and then
He
The part is
% He)
used
Global
part
placed
displayed
connected
1x10
spraying
test
under
with
a 1x10
to the detector inlet.
100 % 10 % 1 %
-7
mbar
.l/s
helium over the outer sur
detector
a
cover, into which helium is
injected.
The leak cannot be
located.
The detector measures the flow of helium
When
on the
there is
spraying
analyzer:
a response
starts, the leak signal is not
time which
depends
and the helium pumping speed S of the system at the
part,
according
T
= V/S
T
is the time required for the signal to reach 63 % of the final
to the following
(T
in
seconds,
relation:
V in litres, S in
-7
mbar.l/s calibrated leak
1x10
-8
mbar
.l/s
connecting
Spray
or
probe
spray
He
Potential leaking
sprayed
The leak can be
on the volume V being
with
penetrating
displayed instantaneously
l/s)
face.
test
part
helium.
located.
the
opening
the
-9
1x10
mbar
it to
the
detector
areas are
part.
tested
of
value.
.l/s
the
A
400
T
esting methods
GB
00008
-
Edition 05
-
February
02
Sniffer
(outboard testing)
method
The test part is
Distance Sniffer)
pressurized
probe,
samples the helium
with helium. The detector, via an
escaping
from the
LDS
part.
(Long
Global test
or
He
The part is
part
LDS
placed
detector
under
a
cover containing a sniffer
probe.
The leak cannot be
The helium from the
accumulates over time inside
cover. The detector
the
concentration
located.
leak
measures
of
helium.
the
Local sniffing
He
part
LDS
test
detector
The sniffer probe is moved
areas
The leak can be
The signal supplied by
analyzer
measurement
The sniffer probe only
part of the helium
from the part. The
depends
separating
of the
likely to contain
located.
is not
a direct
of the
leak.
escaping
sample
on the
distance
the leak from the tip
probe.
leaks.
the
samples
over
3/4
A
400
T
esting methods
GB
00008
-
Edition 05
-
February
02
Bombing method
This method is used for sealed objects that cannot be
directly to the detector
(semiconductors, waterproof watches, etc.).
connected
He
The part is
placed
part
Chamber 1
in
a chamber
part
Chamber
containing
2
pressurized helium.
He
detector
The helium
The part is then removed from the
vacuum
escapes
penetrates
the part if it has
a leak.
chamber
chamber
which is
connected
to the detector. The helium
from the part through the leak and
and
placed
in
another
produces a signal.
This signal is not a direct
pressure inside the part is difficult to
important part such as: the
pressure, the internal volume, the
4/4
measurement
determine.
pressurization
aeration
of the leak as the helium
Several parts play
time, the helium
bombing
time, the size of the
leak.
an
A
401
About Helium and hydrogen
GB 02760
-
Edition 02
- June
08
Helium
Helium is the
representing
other
elements represent
second most common element
about 23 % of the total matter. 76 % is Hydrogen.
an insignificantly small fraction of the total.
in the universe,
All
Helium was
18, 1868.
element
common
very
is actually not abundant.
during the formation of earth escaped to space. Helium is created,
deep in the earth from the radioactive decay of Uranium and Thorium
which also
discovered
volcanic
spectrum
the
discovered
The
discovery in the
its name: “helios” in Greek
in the
generates
in 1881 by
gases emanated
as already known from the sun.
by
spectroscopy
sun’s chronosphere
universe most
Since
the earth its internal heat. On earth Helium was
spectroscopy
by the mountain showed the
of it is in the
it is so light all the Helium present
in a solar eclipse on August
gave the new
means
“sun”. While Helium is
stars:
of Mount
Vesuvio
on earth it
in Italy – the
same
lines in
Helium
of Krypton and 60
are isolated from air by liquefaction and rectification
as a contrary is “extracted” from natural gas and oil wells. Helium
comes
annual world wide production is ca. 3x10
4,500 tons.
concentration
up with the natural gas and is separated and stored. The
in the
times
atmosphere
higher than
is 5
times
Xenon. The
7 m3
bigger than the one
heavier noble gases
process.
or
Helium
Helium is
is so light that
other hand there is a
to earth.
world wide
constantly
This
gives a dynamic equilibrium and is the reason for the
constant concentration
seeping up from the ground all around us, but it
almost
all of it
constant
escapes
flow of Helium from space and the sun
into space fairly rapidly. On the
of ca. 5 ppm Helium in
air.
Helium is a very light
gases;
it is the
most
colorless element
difficult gas to liquefy.
and it is one of the six noble
Helium is a noble gas, which
all practical
protect things from oxidation – and of
gas.
intents
and
means
purposes. It’s used
it doesn’t react with anything for
course
as an inert shield gas to
as leak detection tracer
Helium is a 100 % green gas and has
impact on the atmosphere.
absolutely
no environmental
1/2
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