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Cleaning and inspecting the pump heads, Pumps vario-b / pc 301x vario), Checking the ultimate vacuum – VACUUBRAND PC 3012 VARIO plastic housing User Manual

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Assemble catchpots (14) with joint clips.

Tools required (metric):
- Phillips screw driver size 2

- Open-ended wrench w/f 10/14/16/17

- 5 mm wide Allen key

- Diaphragm key width 66 mm

Cleaning and inspecting the pump heads

(pumps VARIO-B / PC 301x VARIO)

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:

Check hose connectors at pump heads for leaks. If necessary recheck

valve seats and pump chambers.

Checking the ultimate vacuum

After any intervention at the equipment (e.g., repair / maintenance)

the ultimate vacuum of the pump has to be checked. Only if the pump

achieves its specified ultimate vacuum, the pump’s leak rate is low

enough to ensure that no explosive atmospheres will occur in the inte-

rior of the equipment.

After any intervention at the vacuum sensor the leak rate of the equip-

ment has to be checked.