INFICON Sensistor ILS500F Leak Detection System - Manual (Page 66)

Maintenance Instructions 66
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6 Install new Venturi or use compressed air jet and a cotton bud, pipe cleaner or
small brush to clean the nozzles inside the Venturi.
7 Replace hose fitting on Venturi inlet.
8 Reconnect inlet hose.
9 Clean o-ring and install in groove on valve manifold.
10 Reinstall and tighten the four screws.
11 Put plastic washer inside Venturi outlet and reinstall barbed fitting. Tighten with
spanner.
12 Reconnect the exhaust hose.
13 Run through the hardware test again to test that the Venturi delivers adequate max
vacuum.