Checking the ultimate vacuum, Notice – VACUUBRAND BVC professional G User Manual
Page 60
➨
Position bottle in the support.
➨
Depending on BVC version, position tubing
to hose nozzle or quick coupling.
Checking the ultimate vacuum
➨
After any intervention at the equipment (e.g., repair / maintenance) the
ultimate vacuum of the pump has to be checked.
The pump achieves its ultimate vacuum if switching off at an atmo-
spheric pressure > 1000 mbar absolute, a maximum underpressure of
850 mbar (8 LEDs glow) and a leak-free apparatus.
➨
Screw elbow fitting with silencer to the outlet
of the pump (max. 5 turns).
➨
Remove adhesive tape at the cover plate.
If the pump does not achieve the ultimate vacuum:
- Whenever the diaphragms and valves have been replaced, a break-in
period of several hours is required before the pump achieves its ulti-
mate vacuum.
- In case of an unusual noise, switch off pump immediately and check
clamping disc positions.
If the specified ultimate vacuum is not achieved, and if this does not
change after the break-in period:
If necessary recheck valve seats and pump chamber.
NOTICE
In case of a false alarm of the level sensor after replacing diaphragms
and valves perform an adjustment of the level sensor, see section “Ad-
justment of the BVC level sensor to work properly with a new bottle, or to
correct false alarms”.