Pipette Calibration Verification Checklist [FREE PDF]

Accurate pipette calibration is foundational to laboratory data integrity and is explicitly required under ISO 17025:2017 Section 6.4 and CLIA 42 CFR 493.1252, which mandate documented function checks and calibration of all volumetric equipment used in testing. GLP 21 CFR 58.63 requires that pipettes be calibrated at intervals established by the laboratory to ensure measurement accuracy. CAP accreditation standards further specify that out-of-tolerance pipettes be taken out of service immediatel

Industry: Clinical Laboratory
Frequency: Quarterly
Estimated Time: 45-60 minutes
Role: Quality Analyst
Total Items: 36
Compliance: ISO 17025:2017 Section 6.4 - Equipment Calibration and Maintenance, CLIA 42 CFR 493.1252 - Standard: Equipment Maintenance and Function Checks, GLP 21 CFR 58.63 - Equipment Design, Maintenance, and Calibration, ISO 8655-6:2022 - Piston-Operated Volumetric Apparatus Calibration, CAP Accreditation Standards - GEN.55500 / CHM.13850 Pipette Calibration

Pre-Calibration Environment and Equipment Setup

Verify that environmental conditions and reference equipment meet requirements before beginning calibration.

Is the laboratory temperature within the required range of 20°C ± 2°C during calibration?
Is relative humidity within the acceptable range for gravimetric calibration (45–75% RH)?
Has the analytical balance been verified using NIST-traceable calibration weights before this session?
Is the analytical balance reading to at least 4 decimal places (0.0001 g resolution)?
Has distilled or deionized water of appropriate purity (≥Type II) been used for the calibration?

Pipette Identification and Physical Inspection

Record pipette details and perform a visual inspection for physical damage or contamination before calibration.

Is the pipette type, volume range, and manufacturer label clearly identified and matching asset records?
What is the nominal volume range of the pipette being calibrated?
Is the pipette barrel free from cracks, discoloration, or visible internal contamination?
Is the piston shaft and spring mechanism free from corrosion, stiffness, or irregular movement?
Is the volume adjustment dial (if applicable) locking correctly and displaying accurate volume settings?
Has the pipette been equilibrated to room temperature for at least 30 minutes prior to calibration?

Gravimetric Accuracy and Precision Testing

Perform and document the gravimetric calibration measurements at required volume setpoints.

Have at least 10 replicate measurements been performed at each calibration volume setpoint?
What is the measured mean volume at the nominal (100%) setpoint in µL or mL?
What is the calculated systematic error (accuracy/bias) as a percentage of the nominal volume?
What is the calculated coefficient of variation (CV%) for random error at the nominal setpoint?
Has the calibration also been performed at the minimum volume setpoint (10% of nominal)?

Tolerance Limits and Pass/Fail Determination

Compare measured calibration results against applicable ISO 8655 or manufacturer tolerance limits and record the outcome.

Does the systematic error at the nominal volume fall within the ISO 8655-2:2022 maximum allowable limits?
Does the CV% for random error fall within the ISO 8655-2:2022 maximum allowable CV limits?
What is the overall calibration determination for this pipette?
If the pipette failed, has an OOT investigation been initiated per the laboratory's non-conformance procedure?
Have all raw measurement data sheets been attached or referenced in the calibration record?

Tip Compatibility and Seal Integrity

Verify that pipette tips and internal seals are compatible and maintain an air-tight seal during aspiration.

Are only manufacturer-recommended or validated tip types being used with this pipette?
Is the tip cone seating surface free from scratches, wear, or deformation that could cause leakage?
Has a visual leak test been performed by aspirating water and observing for droplet formation at rest?
Are internal O-rings or piston seals showing signs of wear, cracking, or chemical degradation?
Are tips being aspirated and dispensed using correct forward or reverse pipetting technique as validated for this application?

Preventive Maintenance and Service History

Review maintenance schedule adherence and document any service performed during or prior to this calibration.

Is the pipette within its defined preventive maintenance interval (typically quarterly or annually)?
Has the pipette piston been cleaned and lubricated with manufacturer-approved lubricant during this service?
What is the date of the previous calibration for this pipette?
Is there a documented maintenance log entry for this pipette available for the past 12 months?
Please note any replacement parts installed during this service (e.g., O-rings, piston, spring).

Calibration Documentation, Labeling, and Traceability

Ensure all calibration records are complete, the pipette is labeled with calibration status, and traceability chain is maintained.

Has a calibration label been affixed to the pipette showing the calibration date and next due date?
Does the calibration certificate reference the NIST-traceable balance and weights used?
Have all calibration records been entered into the laboratory's equipment management system or logbook?
Please attach a photograph of the completed calibration label affixed to the pipette.
Has the calibration record been reviewed and approved by an authorized laboratory supervisor?

Related Laboratory Checklists

Related Calibration Checklists

Why Use This Pipette Calibration Verification Checklist [FREE PDF]?

This pipette calibration verification checklist [free pdf] helps clinical laboratory teams maintain compliance and operational excellence. Designed for quality analyst professionals, this checklist covers 36 critical inspection points across 7 sections. Recommended frequency: quarterly.

Ensures compliance with ISO 17025:2017 Section 6.4 - Equipment Calibration and Maintenance, CLIA 42 CFR 493.1252 - Standard: Equipment Maintenance and Function Checks, GLP 21 CFR 58.63 - Equipment Design, Maintenance, and Calibration, ISO 8655-6:2022 - Piston-Operated Volumetric Apparatus Calibration, CAP Accreditation Standards - GEN.55500 / CHM.13850 Pipette Calibration. Regulatory-aligned for audit readiness and inspection documentation.

Frequently Asked Questions

What does the Pipette Calibration Verification Checklist [FREE PDF] cover?

This checklist covers 36 inspection items across 7 sections: Pre-Calibration Environment and Equipment Setup, Pipette Identification and Physical Inspection, Gravimetric Accuracy and Precision Testing, Tolerance Limits and Pass/Fail Determination, Tip Compatibility and Seal Integrity, Preventive Maintenance and Service History, Calibration Documentation, Labeling, and Traceability. It is designed for clinical laboratory operations and compliance.

How often should this checklist be completed?

This checklist should be completed quarterly. Each completion takes approximately 45-60 minutes.

Who should use this Pipette Calibration Verification Checklist [FREE PDF]?

This checklist is designed for Quality Analyst professionals in the clinical laboratory industry. It can be used for self-assessments, team audits, and regulatory compliance documentation.

Can I download this checklist as a PDF?

Yes, this checklist is available as a free PDF download. You can also use it digitally in the POPProbe mobile app for real-time data capture, photo documentation, and automatic reporting.