Vacuubrand MD 1 VARIO-SP User Manual download pdf (Page 59)

page 59 of 68

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 specied 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 specied 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.

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Vacuubrand MD 1 VARIO-SP User Manual Page 59