Free 10 Point Evaluation

1- Clean Pipette

After our free pipette evaluation, we service your pipette prior to pipette calibration First, we clean the pipette: Before beginning the inspection, ensure that the pipette is clean and free from any residual substances. Wipe the exterior surfaces with a clean, lint-free cloth and use an appropriate cleaning agent, if necessary, to remove any stubborn residue.

2 - Check For Physical Damage

The free pipette evaluation includes our technicians examining your pipette for any visible signs of damage, such as cracks, chips, or scratches. Inspect the body, handle, plunger, and tip cone carefully. Any physical damage can affect the pipette's performance and accuracy.

3 - Verify Calibration

Regular pipette calibration ensures accurate volume delivery. We check the calibration status of the pipette by referring to its calibration certificate or contacting the manufacturer. If the pipette is due for calibration or if its calibration is uncertain, it should be sent for recalibration before further use.

4 - Inspect Plunger

Operate the pipette's plunger several times to check for smoothness and uniform movement. Ensure that the plunger does not stick or have excessive play. If the plunger mechanism is not functioning properly, it may impact the accuracy and precision of the pipette.

5 - Accuracy Test

Perform a gravimetric test to assess the pipette's accuracy. This involves pipetting a known volume of liquid (typically water) and weighing it on a calibrated analytical balance. Compare the measured weight to the expected weight to determine the pipette's accuracy. If the pipette consistently delivers volumes outside the acceptable range, it may require adjustment or repair.

6 - Inspect Tip Cone

Examine the tip cone for any signs of wear or damage. Make sure it is clean and free from debris. If the tip cone is damaged, it may result in inconsistent tip sealing, leading to inaccurate volume delivery.

7 - Test Precision

Conduct a precision test by repeatedly pipetting a fixed volume of liquid into a weighing container. Weigh the dispensed liquid each time and calculate the coefficient of variation (CV) to assess the pipette's precision. A high CV indicates poor precision, which may necessitate maintenance or replacement.

8 - Check Ejector

Test the ejector mechanism, if applicable, to ensure it operates smoothly and effectively. The ejector should firmly and reliably expel used tips without any residual liquid.

9 - Review Maintenance Records

If available, review the pipette's maintenance records to determine its service history. Note any past issues or repairs that may be relevant to its current condition.

10 - Documentation

Record the results of the inspection, including any observations, issues found, or actions taken. This documentation can be useful for tracking the pipette's performance over time and for compliance with quality assurance procedures.

Serving the scientific community since 1999.