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Publications Video
Calibration and Maintenance of Mechanical Pipettes in the Modern Wastewater Laboratory
Mechanical air-displacement pipettes (mechanical pipettes) are widely used in the modern wastewater laboratory. They are a convenient means of dispensing a wide variety of volumes quickly and efficiently, eliminating carryover and time consuming cleaning procedures. Mechanical pipettes must be tested and maintained regularly to ensure proper operation, much like any other laboratory instrument. Failure to do so can lead to gross error in test results. This video presentation will provide a step by step process for checking accuracy (calibration) and performance using the analytical balance commonly used for suspended solids testing. This presentation is a must for all laboratory analysts and technicians. (Windows Media Player is required for viewing).
High-bandwidth video (1.3 Mbps)
Low-bandwidth video (205 Kbps)
Resources:
Presentation: Calibration of Mechanical Pipettes in the Modern Wastewater Laboratory (PDF) Pipette Performance Check SOP (PDF) Spreadsheet for Calculating Pipette Acceptance (MS EXCEL) Quarterly Worksheet for Calculating Pipette Acceptance (PDF) Annual Worksheet for Calculating Pipette Acceptance (PDF) Z-Factor Table (PDF) Calculations used for Verifying Pipette Calibration (PDF) Beach Water Collection for E. Coli Testing High-bandwidth video (2 Mbps) Low-bandwidth video (81 Kbps) This video was produced by the Wisconsin State Laboratory of Hygiene, with funding provided by the State Lab of Hygiene, the Wisconsin Department of Natural Resources and the Wisconsin Department of Health and Family Services.
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