Dado Lab QB1 - Maintenance; Replace the Protection Filter; Vacuum Leak Check

18 | QB1 User Manual
Replace the protection lter
In the event of accidental suction of liquids, particu-
late matter or foreign bodies, it is necessary to re-
place the protective lter to eciently handle QB1.
To do this, unscrew the transparent lter cap by
hand.
Remove the lter and wipe away any traces of mois-
ture and solid objects with a damp cloth.
Do not use solvents or alcohol.
Reassembling the lter, check the sealed O-ring
(supplied with the protection lter kit).
In case of wear replace it.
Apply a light layer of silicon grease on the thread
and on the o-ring and close the cap by tightening it
by hand.
Protection Filters Kit of 10 pcs. p/n 101 101 3010
Vacuum leak check
After replacing the lter or other maintenance op-
erations it is always good practice to execute a pump
leak check.
Connect a hose barb with 1/8” gas thread at the
outlet of the instrument.
Connect a tube to the hose barb and to an impinger,
or simply to a bottle containing some water.
Partially close the ow regulation knobs.
Start the pump and close the suction.
Wait a few seconds and then verify for the presence
of bubbles, there shouldn’t be any or just couple.
8
Maintenance