Standard Operating Procedure for Calibration of Measuring Instruments

1) Purpose

The purpose of this SOP is to establish the procedures for calibrating measuring instruments to ensure accuracy and reliability in measurements as per regulatory requirements in the pharmaceutical industry.

2) Scope

This SOP applies to all measuring instruments used in the pharmaceutical manufacturing process, including but not limited to thermometers, pressure gauges, and pH meters.

3) Responsibilities

The Quality Assurance Department is responsible for implementing and adhering to this SOP. All personnel involved in the calibration process must be trained and qualified.

4) Procedure

1. Calibration Schedule Establishment
   1. Develop a calibration schedule based on instrument criticality, manufacturer recommendations, and regulatory requirements.
   2. Assign unique identification numbers or labels to each instrument for traceability.
   3. Document calibration frequency and tolerance limits for each instrument.
2. Calibration Process
   1. Retrieve the instrument to be calibrated from its designated location.
   2. Verify the instrument’s identity and check its condition for any physical damage.
   3. Perform calibration using certified calibration standards and procedures.
   4. Record calibration results including before and after values, adjustments made, and calibration date.
   5. Apply calibration labels indicating next due date and calibration status.
3. Out-of-Tolerance Conditions
   1. If an instrument is found out-of-tolerance, quarantine it immediately and perform investigation to determine impact.
   2. Take corrective action, recalibrate if possible, or arrange for repair by authorized personnel.
   3. Document