INFICON UL1000 Helium leak detector - Manual (Page 109)

Maintenance Work
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9.9 Checking/Emptying the Exhaust Filter
Required tools
Ring/open jaw spanner, size 17 mm
It is the task of the exhaust filter to filter out the oil mists which are produced when
taken in air is ejected during a pumpdown process. For safety reasons the exhaust
filter is equipped with a valve which in the case of a blocked filter opens and passes
the taken in air directly to the outside. This helps to prevent damage to the backing
pump by a blocked exhaust line.
The condition of the exhaust filter should, for this reason, be checked in regular
intervals. As soon as the oil level in the oil reservoir vessel reaches approximately
one third of the maximum filling quantity, the oil reservoir vessel needs to be emptied.
To empty the oil reservoir vessel proceed as follows:
• Switch the instrument off and remove the side covers. For this refer to Chapter
1.6.1 .
• Loosen the hexagon screw at the bottom of the reservoir vessel and drain the oil
into a suitable vessel. For this refer to Fig. 1-5/5. Dispose of the oil in accordance
with the local waste disposal regulations.
• Screw in the hexagon screw again and tighten it.
• Check the oil level of the D16 B rotary vane pump and top up oil as required.
9.9.1 Replacing the Filter Insert
Required tools
Side wall separator from accessories
Required material
Replacement filter insert: P/N 200 000 694 (10 pcs.)
The installation location for the exhaust filter is given in Fig. 9-4 below.
STOP Danger
In the case of a blocked exhaust filter, toxic oil vapours are directly emitted into the
environment!
STOP Danger
Before removing one of the covers of the UL1000 and UL1000 Fab/UL1000 the leak
detector must be disconnected from the mains power!