INFICON UL5000 Dry Helium Leak Detector - Manual (Page 27)

Installation
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2.4 Vacuum Connections
2.4.1 Inlet Port
The inlet port is located on the top of the UL5000. The size of the flange is DN 25 KF.
A test object or a test chamber has to be connected to the inlet port if the vacuum
mode is chosen (Refer to Chapter
6.3 ).
The inlet port is also used for the connection of the sniffer line.
2.4.2 Exhaust
The exhaust Fig. 2-6 /12 flange is located underneath the UL5000 at the back side.
The size of the flange is DN 16 KF.
When shipped only the exhaust filter body is preassembled. The filter cartridge is
supplied together with the leak detector and can be installed at the exhaust.
Instead of this an exhaust line can be connected to the exhaust by the exhaust
adapter.
2.4.3 Vent
Usually the parts under test are vented with ambient air when the test is finished. If
it is required the parts can be vented with a different gas (i. e. fresh air, dry air,
nitrogen, …) at max. 1050 mbar pressure. In this case a vent hose has to be
connected to the hose coupling
Fig. 2-6 /10.
2.4.4 Purge
For purge modes it is recommended to use Helium-free gases at atmospheric
pressure. Ambient air can be contaminated with Helium due to
spraying or charging.
In this case a gas supply line (i. e. nitrogen, fresh air, …) should be connected to the
hose coupling
Fig. 2-6 /11. The pressure of these gas line must not exceed
1050 mbar.
The connector 10 and 11 in Fig. 2-6 are quick connectors for hose diameters of 8/
6 mm.
Warning
Risk of injury due to sucking connection flange (inlet port).
If the Vacuum-Mode of the UL5000 is activated, the connection flange may suck
bodily parts around the connection flange.
Keep bodily parts off the connection flange.
Warning
Depending on the chamber the UL5000 is attached to and the gas inside the
chamber lethal gases can be spoiled into the air through the exhaust.