Colony Counter (count verification) (CAL-0241) – Calibration Documents

Calibration Documents: Colony Counter (count verification) (CAL-0241)

Asset ID CAL-0241
Equipment Colony Counter (count verification)
Equipment Type Colony Counter
Department Microbiology
Area/Location Lab
Process Use Counting
Parameter Count
Units CFU
Range Min 0
Range Max 9999
Acceptance Criteria As per verification
Calibration Frequency (days) 365
Calibration Type In-house
Traceability Documented method

Table of Contents

  1. Calibration SOP
  2. Calibration Protocol
  3. Calibration Checklist
  4. Deviation Impact Assessment
  5. Calibration Certificate

Calibration SOP

1. Purpose

The calibration of the Colony Counter (CAL-0241) is performed to ensure accurate counting of colony-forming units (CFU) in microbiological samples. This calibration controls risks associated with data integrity, patient safety, and batch quality by ensuring that the equipment operates within specified parameters.

2. Scope

  • Asset ID: CAL-0241
  • Equipment Name/Type: Colony Counter
  • Department/Area: Microbiology Lab
  • Process Use: Counting
  • Parameter: Count
  • Range: 0 – 9999 CFU
  • Units: CFU
  • Calibration Frequency: 365 days

3. Definitions

  • Calibration: The process of verifying and adjusting the accuracy of an instrument.
  • Verification: The process of confirming that an instrument meets specified requirements.
  • Adjustment: Changes made to an instrument to bring it into compliance with specifications.
  • As Found: The condition of the instrument prior to any adjustments.
  • As Left: The condition of the instrument after adjustments have been made.
  • OOT (Out of Tolerance): A condition where the instrument’s performance exceeds specified limits.
  • Drift: The gradual change in an instrument’s performance over time.
  • Traceability: The ability to verify the history, location, or application of an item by means of documented recorded identification.
  • Measurement Uncertainty: A parameter that characterizes the range of values within which the true value is asserted to lie.
  • Intermediate Check: A verification step performed between calibrations to ensure continued accuracy.

4. References

  • Company Metrology SOP [TBD]
  • ISO/IEC 17025 traceability via calibration certificates
  • ALCOA+ principles

5. Responsibilities

  • Technician/Metrology: Perform calibration and maintain records.
  • QC/QA Reviewer: Review calibration results and documentation.
  • Owner Department: Ensure equipment is available and maintained.
  • External Service Provider: [TBD] if calibration type indicates external.

6. Safety & Preconditions

  • Ensure environmental controls are in place (temperature, humidity).
  • Allow equipment to warm up and stabilize as per manufacturer’s instructions.
  • Maintain cleanliness of the equipment and surrounding area.
  • Check leveling of the equipment.
  • Verify power supply is stable and within specifications.
See also  Pressure Gauge 0-16 bar (CAL-0072) - Calibration Documents

7. Standards & Tools

  • Reference Standards Required: [TBD]
  • Traceability Statement: Documented method.
  • Certificate Validity Check: [TBD]
  • Standard ID Placeholders: [TBD]

8. Calibration Strategy

Calibration will follow the As Found and As Left logic. The minimum number of points for calibration will be five, including endpoints and midpoints, due to the numeric range of 0 to 9999 CFU. It is recommended to take three replicate readings at each point as a best practice.

9. Step-by-Step Procedure

  1. Preparation: Gather all necessary tools and reference standards.
  2. Stabilization: Allow the Colony Counter to warm up for the specified time.
  3. As Found Checks and Data Capture: Record initial readings and observations contemporaneously.
  4. Adjustment Rules: If OOT is detected, follow escalation procedures; adjustments should only be made if allowed.
  5. As Left Verification: Confirm that the equipment is functioning within specifications after adjustments.
  6. Labeling + Documentation Completion: Ensure all records are filled out accurately and contemporaneously (ALCOA+).

10. Acceptance Criteria & Calculations

Acceptance criteria: As per verification. Error calculation formula: [TBD]. Pass/Fail logic will be based on whether the observed values fall within the acceptance criteria. Rounding rule: [TBD].

11. Handling OOT / Failures

  • Immediate containment: Tag equipment and stop use.
  • Notification & deviation initiation: Inform relevant personnel.
  • Impact assessment trigger: Define impact window and review of affected results/batches.
  • Recalibration after repair/adjustment: Ensure equipment is recalibrated post-repair.
  • QA disposition placeholders: [TBD].

12. Records & Retention

  • Logbook entries: Maintain detailed records of calibration activities.
  • Calibration report/certificate filing: Store all calibration documentation securely.
  • e-Records if applicable: [TBD].
  • Label content requirements: Include calibrated date, due date, technician name, and status.

13. Annexures

Annexure A: Calibration Data Sheet

Test Points Reference Observed Error Acceptance Pass/Fail As Found As Left
[TBD] [TBD] [TBD] [TBD] [TBD] [TBD] [TBD] [TBD]

Annexure B: Quick Checklist

  • Environmental controls verified
  • Equipment warmed up
  • Cleanliness checked
  • Leveling confirmed
  • Power supply stable

Annexure C: Example Label Text

Calibration Date: [TBD]
Due Date: [TBD]
Calibrated By: [TBD]
Status: [TBD]

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Calibration Protocol

Calibration Protocol

Protocol ID Asset ID Equipment Name Equipment Type Dept Area Process Use Parameter Units Range Acceptance Criteria Frequency Calibration Type Traceability
[TBD] CAL-0241 Colony Counter (count verification) Colony Counter Microbiology Lab Counting Count CFU 0 – 9999 As per verification 365 days In-house Documented method
See also  Graduated Cylinder 50 mL (CAL-0042) - Calibration Documents

Environmental Conditions

Temperature: [TBD]

Relative Humidity: [TBD]

Vibration: [TBD]

Drafts: [TBD]

Test Point Selection

  • Minimum: 0 CFU
  • 25%: 2500 CFU
  • 50%: 4999 CFU
  • 75%: 7499 CFU
  • Maximum: 9999 CFU

Results Table

Test Point Ref Value Observed (As Found) Error Limit Pass/Fail Observed (As Left) Error Pass/Fail
0 CFU [TBD] [TBD] [TBD] [TBD] [TBD] [TBD] [TBD] [TBD]
2500 CFU [TBD] [TBD] [TBD] [TBD] [TBD] [TBD] [TBD] [TBD]
4999 CFU [TBD] [TBD] [TBD] [TBD] [TBD] [TBD] [TBD] [TBD]
7499 CFU [TBD] [TBD] [TBD] [TBD] [TBD] [TBD] [TBD] [TBD]
9999 CFU [TBD] [TBD] [TBD] [TBD] [TBD] [TBD] [TBD] [TBD]

Stepwise Instructions

  1. Preparation: Ensure the Colony Counter is clean and calibrated prior to use.
  2. Stabilization: Allow the equipment to stabilize for [TBD] minutes before performing readings.
  3. Performing Readings: Take three replicate readings at each test point.
  4. Calculating Error: Calculate the error for each observed value against the reference value.
  5. Evaluation: Compare the calculated errors with acceptance criteria.
  6. Documentation: Record all observations, calculations, and results in the calibration log.

Deviation Instruction for OOT

If any observed value is out of tolerance (OOT):

  • Stop use of the equipment immediately.
  • Notify the supervisor and QA.
  • Open a deviation report.
  • Quarantine impacted results window: [TBD]
  • Await QA decision on further actions.

Approvals

Prepared By Reviewed By Approved By
[Signature/Date] [Signature/Date] [Signature/Date]

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Calibration Checklist

Asset ID Equipment Dept Area Parameter Range Acceptance Frequency Traceability
CAL-0241 Colony Counter (count verification) Microbiology Lab Count 0 – 9999 CFU As per verification 365 days Documented method

Pre-calibration

  • [ ] Verify environmental conditions are within specified limits
  • [ ] Ensure equipment has warmed up as per SOP
  • [ ] Clean equipment according to cleaning procedures
  • [ ] Level the equipment if applicable
  • [ ] Check validity of reference standards
  • [ ] Ensure logbook is ready for entries

As Found Execution

  • [ ] Set initial setpoints for calibration
  • [ ] Perform repeat measurements as required
  • [ ] Record all raw data accurately
  • [ ] Perform necessary calculations for verification
See also  Anemometer (HVAC) (CAL-0250) - Calibration Documents

OOT Immediate Actions

  • [ ] Tag out the equipment
  • [ ] Stop use of the equipment immediately
  • [ ] Notify relevant personnel
  • [ ] Document deviation in the logbook
  • [ ] Trigger impact review process

As Left Verification

  • [ ] Conduct post-adjustment checks
  • [ ] Confirm all measurements are within specified limits

Documentation & Closure

  • [ ] Update equipment label with calibration details
  • [ ] Attach calibration certificate to documentation
  • [ ] Obtain reviewer sign-off
  • [ ] Update next due date in the logbook

Data Integrity (ALCOA+): Ensure all data is Attributable, Legible, Contemporaneous, Original, Accurate, and Complete.

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Deviation Impact Assessment

Field Details
Asset Colony Counter (count verification)
Date [TBD]
Discovered By [TBD]
Document References [TBD]
As Found Results Summary [TBD]

Immediate Containment Checklist

  • Stop use of the equipment
  • Label/tag the equipment as out of tolerance
  • Segregate impacted work

Define Impact Window

Field Details
Last Known In-Tolerance Date [TBD]
Discovery Date [TBD]

Product/Batch/Test Impact Review

Batch/Study/Report ID Results Potentially Impacted Re-test/Re-weigh Decision
[TBD] [TBD] [TBD]

Data Integrity Review Prompts (ALCOA+)

  • Attributable: [TBD]
  • Legible: [TBD]
  • Contemporaneous: [TBD]
  • Original: [TBD]
  • Accurate: [TBD]
  • Complete: [TBD]
  • Consistent: [TBD]
  • Enduring: [TBD]
  • Available: [TBD]

Risk Assessment

Severity Probability Detectability Rationale Overall Risk
[TBD] [TBD] [TBD] [TBD] [TBD]

Investigation Summary

Summary of investigation findings: [TBD]

Root Cause: [TBD]

CAPA Plan

Action Owner Due Date Effectiveness Check
[TBD] [TBD] [TBD] [TBD]

QA Disposition

Release/Hold/Retest/Recall Triggers: [TBD]

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Calibration Certificate

Certificate No: [TBD]

Date: [TBD]

Next Due Date: [TBD]

Asset Details

Asset ID Equipment Name Equipment Type Dept Area Make/Model Serial No Location Parameter/Range/Units Acceptance Criteria
CAL-0241 Colony Counter (count verification) Colony Counter Microbiology Lab [TBD] [TBD] [TBD] Count: 0 – 9999 CFU As per verification

Conditions

Environment: [TBD]

Reference Standards

Standard Name/ID Certificate No Due Date Traceability Statement
[TBD] [TBD] [TBD] Documented method

Results

As Found Results

Test Point Result (CFU)
1 [TBD]
2 [TBD]
3 [TBD]
4 [TBD]
5 [TBD]

As Left Results

Test Point Result (CFU)
1 [TBD]
2 [TBD]
3 [TBD]
4 [TBD]
5 [TBD]

Measurement Uncertainty Statement: [TBD]

Statement of Conformity: [Pass/Fail overall]

Remarks: [TBD]

Signatures

Performed by: ____________________ Date: ___________

Checked by: ______________________ Date: ___________

Approved by: _____________________ Date: ___________

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