Method for leak-testing hand-held piston stroke pipettes and associated leak-testing apparatus
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United States of America Patent
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Apr 7, 2015
Grant Date -
Sep 27, 2012
app pub date -
Oct 20, 2010
filing date -
Oct 28, 2009
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Abstract
A method for leak testing of hand-held piston stroke pipettes and a corresponding leak testing apparatus (1) for performing the method. Essential to the system is a holder (8) for the sealed connection of a pipette tip (3) to the leak-testing apparatus. A line system (9) with connecting sections of the leak-testing apparatus forms a specific connection volume. The pipette tip (3) is evacuated to a measuring pressure below atmospheric pressure. With the vacuum pump (5) disconnected and the connection volume sealed off, the pressure is measured after a specific time interval, and any possible rise in pressure is determined. An indication of the serviceability of the pipette (2) is generated from the pressure rise determined.
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