Calibration Documents: Incubator Temp Sensor (20-25°C) (CAL-0156)

Asset ID	CAL-0156
Equipment	Incubator Temp Sensor (20-25°C)
Equipment Type	Incubator
Department	Microbiology
Area/Location	Incubation
Process Use	Microbial growth
Parameter	Temperature
Units	°C
Range Min	10
Range Max	40
Acceptance Criteria	±0.5°C
Calibration Frequency (days)	180
Calibration Type	External
Traceability	ISO17025

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Calibration SOP

1. Purpose

The calibration of the Incubator Temp Sensor (20-25°C) is performed to ensure accurate temperature readings within the specified range, which is critical for microbial growth processes. This calibration controls risks associated with inaccurate temperature measurements that could compromise patient safety, batch quality, and data integrity.

2. Scope

• Asset ID: CAL-0156
• Equipment Name/Type: Incubator Temp Sensor (20-25°C) / Incubator
• Department/Area: Microbiology / Incubation
• Process Use: Microbial growth
• Parameter: Temperature
• Range: 10°C to 40°C
• Units: °C
• Calibration Frequency: 180 days

3. Definitions

• Calibration: The process of comparing a measurement instrument to a known standard to determine its accuracy.
• Verification: The process of confirming that a measurement instrument is functioning correctly.
• Adjustment: The process of altering a measurement instrument to bring it into alignment with a standard.
• 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 measurement falls outside the defined acceptance criteria.
• Drift: The gradual change in the output of a measurement instrument 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 periodic assessment of an instrument’s performance between calibrations.

4. References

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

5. Responsibilities

• Technician/Metrology: Perform calibration and document results.
• QC/QA Reviewer: Review calibration documentation for compliance.
• Owner Department: Ensure equipment is available and maintained.
• External Service Provider: Conduct external calibrations as required.

6. Safety & Preconditions

• Ensure environmental controls are in place (temperature, humidity).
• Allow equipment to warm-up and stabilize as per manufacturer guidelines.
• Maintain cleanliness of the equipment and surrounding area.
• Check that the incubator is level and stable.
• Verify power supply is stable and within specifications.

7. Standards & Tools

• Reference standards required: [TBD]
• Traceability statement: ISO17025
• Certificate validity check: Ensure all calibration certificates are current and valid.
• Standard ID placeholders: [TBD]

8. Calibration Strategy

Calibration will follow an As Found then As Left logic. The minimum number of points for calibration will be five, including endpoints (10°C and 40°C) and midpoints. It is recommended to take three replicate readings at each point to ensure accuracy.

9. Step-by-Step Procedure

1. Preparation: Gather all necessary tools and reference standards.
2. Stabilization: Allow the incubator to reach operating conditions.
3. As Found checks and data capture: Measure temperature at defined points and record data contemporaneously (ALCOA+).
4. Adjustment rules: If any readings are OOT, escalate for adjustment as per SOP.
5. As Left verification: Confirm that all adjustments bring the instrument within acceptance criteria.
6. Labeling + documentation completion: Complete all required documentation and label the equipment with calibration details.

10. Acceptance Criteria & Calculations

Acceptance criteria: ±0.5°C from the target temperature. The error calculation formula is:

Error = Observed Value – True Value

Pass/Fail Logic: If the absolute value of the error is within the acceptance criteria, the calibration passes; otherwise, it fails.

Rounding rule placeholder: [TBD]

11. Handling OOT / Failures

• Immediate containment: Tag equipment and stop use.
• Notification & deviation initiation: Notify QA and document the deviation.
• Impact assessment trigger: Review affected results/batches within the impact window.
• Recalibration after repair/adjustment: Ensure recalibration is performed post-adjustment.
• QA disposition placeholders: [TBD]

12. Records & Retention

• Logbook entries: Document all calibration activities.
• Calibration report/certificate filing: Maintain records as per company policy.
• 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 warm-up completed
• Cleanliness confirmed
• Leveling checked
• Power supply verified

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-0156	Incubator Temp Sensor (20-25°C)	Incubator	Microbiology	Incubation	Microbial growth	Temperature	°C	10 – 40	±0.5°C	180 days	External	ISO17025

Environmental Conditions

Temperature: [TBD]

Relative Humidity: [TBD]

Vibration: [TBD]

Drafts: [TBD]

Test Point Selection

Test points will be selected based on the following range:

• Minimum (10°C)
• 25% of Range (20°C)
• 50% of Range (25°C)
• 75% of Range (30°C)
• Maximum (40°C)

Results Table

Test Point	Ref Value	Observed (As Found)	Error	Limit	Pass/Fail	Observed (As Left)	Error	Pass/Fail
10°C	[TBD]	[TBD]	[TBD]	±0.5°C	[TBD]	[TBD]	[TBD]	[TBD]
20°C	[TBD]	[TBD]	[TBD]	±0.5°C	[TBD]	[TBD]	[TBD]	[TBD]
25°C	[TBD]	[TBD]	[TBD]	±0.5°C	[TBD]	[TBD]	[TBD]	[TBD]
30°C	[TBD]	[TBD]	[TBD]	±0.5°C	[TBD]	[TBD]	[TBD]	[TBD]
40°C	[TBD]	[TBD]	[TBD]	±0.5°C	[TBD]	[TBD]	[TBD]	[TBD]

Stepwise Instructions

1. Preparation: Ensure the incubator is clean and operational. Verify that the temperature sensor is calibrated and functioning.
2. Stabilization: Allow the incubator to stabilize at the test points for at least 30 minutes before taking readings.
3. Performing Readings: Take three replicate readings at each test point. Record the observed values.
4. Calculating Error: Calculate the error for each observed value using the formula: Error = Observed Value – Ref Value.
5. Evaluation: Compare the calculated error against the acceptance criteria (±0.5°C).
6. Documentation: Complete the results table and ensure all data is recorded accurately, maintaining ALCOA+ principles.

Deviation Instruction for OOT

If any observed value is outside the acceptance criteria:

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

Approvals

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

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Calibration Checklist

Asset ID	Equipment	Dept	Area	Parameter	Range	Acceptance	Frequency	Traceability
CAL-0156	Incubator Temp Sensor (20-25°C)	Microbiology	Incubation	Temperature	10 – 40 °C	±0.5°C	180 days	ISO17025

Pre-calibration

• [ ] Verify environmental conditions are within acceptable limits
• [ ] Ensure incubator has been warmed up for adequate time
• [ ] Clean the incubator and surrounding area
• [ ] Level the incubator if necessary
• [ ] Check validity of reference standards
• [ ] Ensure calibration logbook is ready for entries

As Found Execution

• [ ] Record initial setpoints of the temperature sensor
• [ ] Perform multiple repeats for accuracy
• [ ] Record all raw data during calibration
• [ ] Perform necessary calculations to determine deviations

OOT Immediate Actions

• [ ] Tag out the equipment if out of tolerance (OOT)
• [ ] Stop use of the incubator immediately
• [ ] Notify the responsible personnel
• [ ] Document deviation in the logbook
• [ ] Trigger impact review for affected processes

As Left Verification

• [ ] Conduct post-adjustment checks to confirm settings
• [ ] Ensure all parameters are within specified limits

Documentation & Closure

• [ ] Update equipment label with new calibration date
• [ ] Attach calibration certificate to logbook
• [ ] Obtain reviewer sign-off on calibration documentation
• [ ] Update next due date for calibration

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Deviation Impact Assessment

Event Summary
Asset: Incubator Temp Sensor (20-25°C) Date: [TBD] Discovered By: [TBD] Document References: [TBD] As Found Results Summary: [TBD]

Immediate Containment Checklist

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

Define Impact Window

Last known in-tolerance date: [TBD] to 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

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-0156	Incubator Temp Sensor (20-25°C)	Incubator	Microbiology	Incubation	[TBD]	[TBD]	[TBD]	Temperature (10-40°C) / °C	±0.5°C

Conditions

Environment: [TBD]

Reference Standards

Standard Name/ID	Certificate No	Due Date	Traceability Statement
[TBD]	[TBD]	[TBD]	Traceability to ISO17025

Results

As Found Results

Test Point	Measured Value (°C)	Remarks
1	[TBD]	[TBD]
2	[TBD]	[TBD]
3	[TBD]	[TBD]
4	[TBD]	[TBD]
5	[TBD]	[TBD]

As Left Results

Test Point	Measured Value (°C)	Remarks
1	[TBD]	[TBD]
2	[TBD]	[TBD]
3	[TBD]	[TBD]
4	[TBD]	[TBD]
5	[TBD]	[TBD]

Measurement Uncertainty Statement: [TBD]

Statement of Conformity: [Pass/Fail]

Remarks: [TBD]

Signatures

Performed by: ______________________ Date: __________

Checked by: ______________________ Date: __________

Approved by: ______________________ Date: __________

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