Calibration Documents: Digital Thermometer (CAL-0050)

Asset ID	CAL-0050
Equipment	Digital Thermometer
Equipment Type	Digital Thermometer
Department	QC
Area/Location	General
Process Use	Temperature check
Parameter	Temperature
Units	°C
Range Min	-50
Range Max	200
Acceptance Criteria	±0.5°C
Calibration Frequency (days)	365
Calibration Type	External
Traceability	ISO17025

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Calibration SOP

1. Purpose

The calibration of the Digital Thermometer (CAL-0050) is performed to ensure accurate temperature measurements, which are critical for maintaining patient safety, ensuring batch quality, and preserving data integrity. Accurate temperature readings are essential in quality control processes to prevent deviations that could affect product safety and efficacy.

2. Scope

• Asset ID: CAL-0050
• Equipment Name/Type: Digital Thermometer
• Department/Area: QC
• Process Use: Temperature check
• Parameter: Temperature
• Range: -50°C to 200°C
• Units: °C
• Calibration Frequency: 365 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 an instrument meets specified requirements.
• Adjustment: The process of modifying an instrument to bring it into compliance with specified standards.
• 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 measurements exceed specified acceptance criteria.
• Drift: The gradual change in an instrument’s accuracy 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 expected to lie.
• Intermediate Check: A periodic verification 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 maintain records.
• QC/QA Reviewer: Review calibration results and documentation.
• Owner Department: Ensure compliance with calibration schedule.
• External Service Provider: Conduct external calibration as required.

6. Safety & Preconditions

• Ensure environmental controls are in place (temperature, humidity).
• Allow equipment to warm up and stabilize as per manufacturer recommendations.
• Maintain cleanliness of the equipment and surrounding area.
• Check leveling of the thermometer before use.
• Verify power supply is stable and within specifications.

7. Standards & Tools

• Reference Standards Required: Calibration standards traceable to ISO17025.
• Traceability Statement: Calibration performed under ISO17025.
• Certificate Validity Check: Ensure calibration certificates are current and valid.
• Standard ID Placeholders: [TBD]

8. Calibration Strategy

Calibration will follow an As Found then As Left logic:

• Minimum number of points: 5 points including endpoints and midpoints across the range of -50°C to 200°C.
• Replicate readings at each point: 3 repeats as a best practice.

9. Step-by-Step Procedure

1. Preparation: Gather all necessary tools and reference standards.
2. Stabilization: Allow the thermometer to stabilize in the calibration environment.
3. As Found checks and data capture: Record initial temperature readings at specified points.
4. Adjustment rules: If OOT is detected, escalate for adjustment as per SOP.
5. As Left verification: Record final readings after any adjustments.
6. Labeling + documentation completion: Ensure all records are filled out contemporaneously (ALCOA+).

10. Acceptance Criteria & Calculations

Acceptance criteria for the Digital Thermometer is ±0.5°C. 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: [TBD]

11. Handling OOT / Failures

• Immediate containment: Tag equipment and stop use.
• Notification & deviation initiation: Notify QA and initiate deviation process.
• Impact assessment trigger: Define impact window and review of affected results/batches.
• Recalibration after repair/adjustment: Schedule recalibration as necessary.
• 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, by whom, 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 stabilized
• Calibration standards checked
• Documentation prepared

Annexure C: Example Label Text

Calibrated 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-0050	Digital Thermometer	Digital Thermometer	QC	General	Temperature check	Temperature	°C	-50 to 200	±0.5°C	365 days	External	ISO17025

Environmental Conditions

Temperature: [TBD] °C

Relative Humidity: [TBD] %

Vibration: [TBD]

Drafts: [TBD]

Test Point Selection

• Minimum: -50 °C
• 25% of Range: -25 °C
• 50% of Range: 0 °C
• 75% of Range: 100 °C
• Maximum: 200 °C

Results Table

Test Point	Ref Value	Observed (As Found)	Error	Limit	Pass/Fail	Observed (As Left)	Error	Pass/Fail
-50 °C	[TBD]	[TBD]	[TBD]	±0.5°C	[TBD]	[TBD]	[TBD]	[TBD]
-25 °C	[TBD]	[TBD]	[TBD]	±0.5°C	[TBD]	[TBD]	[TBD]	[TBD]
0 °C	[TBD]	[TBD]	[TBD]	±0.5°C	[TBD]	[TBD]	[TBD]	[TBD]
100 °C	[TBD]	[TBD]	[TBD]	±0.5°C	[TBD]	[TBD]	[TBD]	[TBD]
200 °C	[TBD]	[TBD]	[TBD]	±0.5°C	[TBD]	[TBD]	[TBD]	[TBD]

Stepwise Instructions

1. Preparation: Ensure the Digital Thermometer is clean and calibrated as per the last calibration record.
2. Stabilization: Allow the thermometer to stabilize at room temperature for at least 30 minutes.
3. Performing Readings:
   • Take three replicate readings at each test point.
4. Calculating Error: Calculate the error for each reading by subtracting the reference value from the observed value.
5. Evaluation: Compare the calculated error against the acceptance criteria of ±0.5°C.
6. Documentation: Record all observations in the results table and ensure all data is complete and accurate (ALCOA+).

Deviation Instruction for OOT

If any reading is outside the acceptance criteria:

• Stop use of the Digital Thermometer.
• Notify the supervisor immediately.
• Open a deviation report.
• Quarantine 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-0050	Digital Thermometer	QC	General	Temperature	-50 to 200 °C	±0.5°C	365 days	ISO17025

Pre-calibration

• [ ] Verify environmental conditions are within specified limits
• [ ] Allow equipment to warm up as per manufacturer guidelines
• [ ] Clean the equipment as per SOP
• [ ] Level the equipment if necessary
• [ ] Confirm reference standards are valid and calibrated
• [ ] Ensure logbook is ready for data entry

As Found Execution

• [ ] Set the thermometer to specified setpoints
• [ ] Perform repeat measurements as required
• [ ] Record raw data accurately
• [ ] Perform necessary calculations to determine deviations

OOT Immediate Actions

• [ ] Tag out the equipment if out of tolerance (OOT)
• [ ] Stop use of the equipment immediately
• [ ] Notify the supervisor/QA of the OOT condition
• [ ] Document the deviation in the logbook
• [ ] Trigger impact review as per SOP

As Left Verification

• [ ] Conduct post-adjustment checks to confirm accuracy
• [ ] Ensure all measurements are within acceptance limits

Documentation & Closure

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

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

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Deviation Impact Assessment

Event Summary
Asset: Digital Thermometer Date: [TBD] Discovered By: [TBD] Document References: [TBD] As Found Results Summary: [TBD]

Immediate Containment Checklist

• Stop use
• Label/Tag
• 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-0050	Digital Thermometer	Digital Thermometer	QC	General	[TBD]	[TBD]	[TBD]	Temperature: -50 to 200 °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)	Acceptance Criteria
-50	[TBD]	±0.5°C
0	[TBD]	±0.5°C
50	[TBD]	±0.5°C
100	[TBD]	±0.5°C
200	[TBD]	±0.5°C

As Left Results

Test Point	Measured Value (°C)	Acceptance Criteria
-50	[TBD]	±0.5°C
0	[TBD]	±0.5°C
50	[TBD]	±0.5°C
100	[TBD]	±0.5°C
200	[TBD]	±0.5°C

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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