Eppendorf Research plus - Manual (Page 26)

5 Maintenance
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Eppendorf Research® plus — Operating manual
2. Mark the volume setting ring and the ejector
with a common mark with a pen. This mark
serves as an orientation for factory
adjustment changes. When changing the
factory adjustment, you can turn the volume
setting ring, without the volume display
changing. The mark on the volume setting
ring and the ejector informs you how far you
have moved from the factory setting.
3. Keep the ejector pressed and remove the
safety plug with the pin.
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