INFICON UL1000 Helium leak detector - Manual (Page 113)

Maintenance Work
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Further oil changes should be done before and after storing the pump for a longer
period of time.
Required tools
Side wall separator
Hexagon socket screw key, size 5 mm; 8 mm
Open jaw spanner, size 13 mm
Required material
Artic oil 1 l. P/N 200 99 091
• Switch the instrument off and remove the covers. To open the instrument,
observe the instructions given in
9.6.1 .
• Cut the cable straps for the oil drain hose and run the drain hose to the oil
collection vessel.
• With a 5 mm hexagon socket screw key unscrew the oil drain plug at the hose
end. Use the 13 mm open jaw spanner for counteracting.
• Drain the waste oil into a suitable vessel. As soon as the oil flow reduces, screw
the oil drain plug back in.
• Switch the pump on briefly (10 s max.) and switch it off again. Remove the oil
drain plug again and let the remaining oil drain out.
• Screw the oil drain plug back in again. Check the gasket and replace it if required.
Affix the oil drain hose with a cable strap again.
• Unscrew oil fill plug Fig. 9-6 /1 from the oil fill opening and top up fresh oil up to
the maximum level. The maximum amount of oil is 0.8 litres.
• Screw the oil fill plug back in again and tighten it.
Notice: After starting up, the fresh oil should be degassed. For this let the leak
detector operate in the „STAND BY“ mode and leave the gas ballast open
for approximately 20 minutes.
Caution
Exchange the oil always while the vacuum pump is still warm and with the vacuum
pump switched off!
Caution
Oil may damage the environment! For this reason dispose of it properly and in line
with the applicable environment regulations.