Inficon TL3-5 User manual

OPERATING MANUAL
linc84en1-04 (1610)
Catalog No.
155 80
155 81
Adjustable Helium Test Leak TL3-5 / TL4-6

0-2
Content.fm Operating Manual
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Content 0-3
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Content
1 Technical Data 1-1
2 Supplied Equipment 1-3
3 Operating and Handling 1-4
3.1 First Use or Changing the Type of Gas 1-6
3.2 Changing the Reservoir Cylinder without Changing the Type of Gas 1-10
3.3 Storage when unused 1-13
3.4 Maintenance 1-13
4 Applications 1-14
4.1 Use for Vacuum Leak Detection 1-14
4.2 Use for Overpressure Leak Tests (Sniffer Probe) 1-14
5 Using Search Gases other than Helium 1-17
6 Adjustment of leak rate 1-19
7 Spare Parts 1-24

0-4 Content
Content.fm Operating Manual
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INFICON-Service
If an appliance is returned to INFICON, indicate whether the appliance is free of
substances damaging to health or whether it is contaminated. If it is contaminated also
indicate the nature of hazard.
For this please use the form provided in the Annex. INFICON must return any appliance
without a declaration of contamination to the sender’s address.
The references to diagrams, e.g. (2/5), consist of the Fig. No. and the Item No. in that
order.
General Note
The right of alterations in the design and the technical data is reserved. The illustrations
are not binding.
Caution
Indicates procedures that must be strictly observed to prevent damage to, or
destruction of, the test leak.

Technical Data 1-1
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1 Technical Data
1) with manometer reading 0 bar and p<1 mbar at connecting flange.
Test Leak
Leak rate adjustment range TL3-5 10-3 ... 10-5 mbar l/s
Leak rate adjustment range TL4-6 10-4 ... 10-6 mbar l/s
Nominal leak rate TL3-5 5 ·10-5 mbar l/s
Nominal leak rate TL4-6 5 ·10-6 mbar l/s
Uncertainty of the nominal leak rate1) ± 10%
Temperature coefficient Negligible
Leak type Capillary
Calibrated for Helium
Connecting flange DN 16 ISO-KF
Manometer reading -1 ... +15 bar (overpressure)
Helium cylinder
Test gas Helium 5.0
Purity 99.999 Vol.-%
Bottle capacity 1 l
Filling pressure 12 bar
Filling amount 12 l
Inlet pressure max. max. 12 bar
Weight
With gas cylinder: 425 g
Without gas cylinder: 300 g

1-2 Technical Data
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Fig. 1-1 Dimensional drawing (all measures in mm)

Supplied Equipment 1-3
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2 Supplied Equipment
• 1 test leak complete with manometer, gas-reservoir shut-off valve and leak shut-off
valve
• 1 helium bottle (HE 5.0; 12 bar; 1 l)
• 1 holder for setting up the helium bottle with test leak
• Installation instructions for the holder

1-4 Operating and Handling
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3 Operating and Handling
Always unscrew valve for a short time only. The leak outlet area on valve should not be
touched, particularly not with your fingers or greasy objects.
Retain the protection cap for the flange and fit it each time the test leak is removed.
Holder
The holder included is used for safe storage of the test leak. It is installed according to
the mounting instructions included, see Fig. 1-2.
Caution
The reservoir cylinder is pressurised.
Protect it against direct sun light, temperatures over 50 °C and damage.

Operating and Handling 1-5
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Fig. 1-2 Test leak TL 3-5 / 4-6, complete
Pos. Description Pos. Description
1overpressure manometer for test gas pressure 5connecting flange DN 16 ISO-KF
2test gas supply shut-off valve 6shut-off valve for leak outlet orifice
3vent screw 7test gas bottle
4body with leak apillary 8holder

1-6 Operating and Handling
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3.1 First Use or Changing the Type of Gas
1Close all valves and the vent screw.
2Unscrew old test gas bottle.
3Remove protective cap from new test gas bottle.
4Screw in the new reservoir (hand tight) until to the stop.
Fig. 1-3

Operating and Handling 1-7
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5Open the test gas supply on the reservoir (the knob turns downwards!)
The pressure gauge must now indicate the pressure of the gas bottle.
6Close the blocking valve on the reservoir (the knob turns upwards!).
Fig. 1-4
Fig. 1-5

1-8 Operating and Handling
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7Open the vent screw so far that the pressure drops to 0 bar (purge).
8Close the vent screw.
Fig. 1-6
Fig. 1-7

Operating and Handling 1-9
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9Open the test gas supply, so that the pressure reaches the pressure of the test gas
cylinder.
10 Close test gas supply.
Fig. 1-8
Fig. 1-9

1-10 Operating and Handling
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Repeat process steps 6. to 10. twice so as to ensure that the gas reservoir in front of the
test leak has been exchanged completely.
The test leak will now be ready. The desired pressure can be adjusted with the venting
screw.
3.2 Changing the Reservoir Cylinder without Changing
the Type of Gas
1Close all valve. (the knob turns upwards!)
2Unscrew the old test gas bottle.
Fig. 1-10

Operating and Handling 1-11
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3After removing the protective cap screw on the new test gas bottle.
4Open the test gas supply.
The manometer displays now the test gas bottle pressure.
Fig. 1-11
Fig. 1-12

1-12 Operating and Handling
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5Close the test gas supply.
6Open the vent screw so far, that the pressure drops to the desired pressure.
Fig. 1-13
Fig. 1-14

Operating and Handling 1-13
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7Close the vent screw.
The Helium test leak is now ready for operation.
3.3 Storage when unused
Put the protective cap on the connection flange DN 16 KF and make sure that all valves
and the vent screw are closed. Store the Helium test leak in a lying position or standing
upright in the holder, protected against impact shock and high temperatures
3.4 Maintenance
It is recommended to retighten the union nut of the valve (Fig. 1-2/2) from time to time at
a torque of 2.5 Nm by turning it in clockwise direction (how often this is required depends
on how much the test leak is used). Thereafter it must be easily possible to turn the knob
with two fingers.
Fig. 1-15

1-14 Applications
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4 Applications
4.1 Use for Vacuum Leak Detection
The test leak TL3-5 / TL4-6 can be fitted by its DN 16 KF flange connection to any leak
detector or any vacuum apparatus and can then be used for tuning the mass
spectrometer as well as for checking response time and detection sensitivity.
To adjust the test leak rate see chapter 6, Fig. 1-20 and Fig. 1-21.
4.2 Use for Overpressure Leak Tests (Sniffer Probe)
The Helium test leak TL3-5 / TL4-6 is set up in holder (see Fig. 1-1/2). By unscrewing the
valve at the swivel nut the Helium test leak TL3-5 / TL4-6 becomes accessible for a sniffer
probe tip.
Fig. 1-16

Applications 1-15
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The leak outlet orifice itself is on the face of the sealed-in tubulation which is now visible.
Fig. 1-17
Caution
Clogging of the leak capillary.
The size of the leak outlet orifice can change or get choked due to contamination
Caution
Do not touch the leak outlet orifice with the fingers or with greasy objects.

1-16 Applications
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The measured leak rate depends on the distance between sniffer tip and leak, and also
on the speed at which the sniffer tip is moved past the leak.
The size of the leak depends on the pressure as indicated on the pressure gauge and can
be determined from the leak rate diagrams.
Caution
When no longer using the test leak anymore always close the valve.