Calibration Documents: Hygrometer (CAL-0060)

Asset ID	CAL-0060
Equipment	Hygrometer
Equipment Type	Humidity Meter
Department	Stability
Area/Location	Stability Room
Process Use	RH monitoring
Parameter	Humidity
Units	%RH
Range Min	10
Range Max	90
Acceptance Criteria	±3%RH
Calibration Frequency (days)	180
Calibration Type	External
Traceability	ISO17025

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Calibration SOP

1. Purpose

The calibration of the Hygrometer is performed to ensure accurate monitoring of relative humidity (RH) within the Stability Room. This is critical for maintaining the integrity of pharmaceutical products, ensuring patient safety, and upholding batch quality. Accurate humidity measurements are essential for compliance with Good Manufacturing Practices (GMP) and for safeguarding data integrity throughout the stability testing process.

2. Scope

• Asset ID: CAL-0060
• Equipment Name/Type: Hygrometer / Humidity Meter
• Department/Area: Stability
• Process Use: RH monitoring
• Parameter: Humidity
• Range: 10%RH to 90%RH
• Units: %RH
• Calibration Frequency: 180 days

3. Definitions

• Calibration: The process of verifying and adjusting the accuracy of a measuring instrument against a known standard.
• 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 measurement falls outside the established acceptance criteria.
• Drift: The gradual change in an instrument’s output 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 verification process 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 in good condition for calibration.
• External Service Provider: Conduct external calibration as per requirements.

6. Safety & Preconditions

• Ensure the Stability Room is maintained at controlled environmental conditions.
• Allow the Hygrometer to warm up and stabilize for at least [TBD] minutes prior to calibration.
• Ensure cleanliness of the equipment and surrounding area.
• Verify that the Hygrometer is level and properly positioned.
• Check power supply and functionality of the device before calibration.

7. Standards & Tools

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

8. Calibration Strategy

Calibration will follow the As Found and As Left logic:

• Minimum number of points: At least 5 points including endpoints (10%RH, 90%RH) and midpoints (20%RH, 50%RH, 80%RH).
• Replicate readings: Perform 3 repeats at each point as a best practice.

9. Step-by-Step Procedure

1. Preparation: Gather all necessary tools and standards.
2. Stabilization: Allow the Hygrometer to stabilize in the environment.
3. As Found checks and data capture: Record initial readings at specified points.
4. Adjustment rules: If OOT is found, follow adjustment protocols; if not allowed, escalate to QA.
5. As Left verification: Record final readings after adjustments.
6. Labeling + documentation completion: Ensure all records are filled out contemporaneously (ALCOA+).

10. Acceptance Criteria & Calculations

Acceptance criteria: ±3%RH

Error calculation formula: Error = Observed Value – True Value

Pass/Fail logic: If the absolute value of the error is within 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 initiate deviation report.
• Impact assessment trigger: Define impact window and review 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 in accordance with 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-0060	Hygrometer	Humidity Meter	Stability	Stability Room	RH monitoring	Humidity	%RH	10 – 90	±3%RH	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 values:

• Min: 10%RH
• 25%: 27.5%RH
• 50%: 50%RH
• 75%: 72.5%RH
• Max: 90%RH

Results Table

Test Point	Ref Value	Observed (As Found)	Error	Limit	Pass/Fail	Observed (As Left)	Error	Pass/Fail
10%RH	10%RH	[TBD]	[TBD]	±3%RH	[TBD]	[TBD]	[TBD]	[TBD]
27.5%RH	27.5%RH	[TBD]	[TBD]	±3%RH	[TBD]	[TBD]	[TBD]	[TBD]
50%RH	50%RH	[TBD]	[TBD]	±3%RH	[TBD]	[TBD]	[TBD]	[TBD]
72.5%RH	72.5%RH	[TBD]	[TBD]	±3%RH	[TBD]	[TBD]	[TBD]	[TBD]
90%RH	90%RH	[TBD]	[TBD]	±3%RH	[TBD]	[TBD]	[TBD]	[TBD]

Stepwise Instructions

1. Preparation: Ensure the hygrometer is clean and free from contaminants.
2. Stabilization: Allow the hygrometer to stabilize in the environment 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 as: Error = Observed – Ref Value.
5. Evaluation: Compare the error against the acceptance criteria of ±3%RH.
6. Documentation: Record all observations in the results table.

Deviation Instruction for OOT

If any reading is found outside the acceptance criteria:

• Stop use of the hygrometer immediately.
• Notify the QA department.
• Open a deviation report.
• Quarantine the 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-0060	Hygrometer	Stability	Stability Room	Humidity	10%RH – 90%RH	±3%RH	180 days	ISO17025

Pre-calibration

• [ ] Verify environmental conditions are within acceptable limits
• [ ] Allow hygrometer to warm up for [TBD] minutes
• [ ] Clean the hygrometer as per SOP
• [ ] Level the hygrometer if applicable
• [ ] Check validity of reference standards
• [ ] Ensure logbook is ready for data entry

As Found Execution

• [ ] Set hygrometer to specified setpoints
• [ ] Perform repeat measurements
• [ ] Record raw data accurately
• [ ] Perform necessary calculations

OOT Immediate Actions

• [ ] Tag out the hygrometer
• [ ] Stop use immediately
• [ ] Notify QA and relevant personnel
• [ ] Document deviation
• [ ] Trigger impact review

As Left Verification

• [ ] Conduct post-adjustment checks
• [ ] Confirm all readings are within acceptance limits

Documentation & Closure

• [ ] Update equipment label
• [ ] Attach calibration certificate
• [ ] Obtain reviewer sign-off
• [ ] Update next due date in logbook

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: Hygrometer Date: [TBD] Discovered By: [TBD] Document References: [TBD] As Found Results Summary: [TBD]

Immediate Containment Checklist

• Stop use of the asset
• Label/tag the asset as out of service
• 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-0060	Hygrometer	Humidity Meter	Stability	Stability Room	[TBD]	[TBD]	[TBD]	Humidity (10-90 %RH)	±3%RH

Conditions

Environment: [TBD]

Reference Standards

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

Results

As Found Results

Test Point	Measured Value (%RH)	Acceptance Criteria
10%	[TBD]	±3%RH
30%	[TBD]	±3%RH
50%	[TBD]	±3%RH
70%	[TBD]	±3%RH
90%	[TBD]	±3%RH

As Left Results

Test Point	Measured Value (%RH)	Acceptance Criteria
10%	[TBD]	±3%RH
30%	[TBD]	±3%RH
50%	[TBD]	±3%RH
70%	[TBD]	±3%RH
90%	[TBD]	±3%RH

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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