Standard Operating Procedure for Calibration of Balances and Scales

1) Purpose

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

2) Scope

This SOP applies to all balances and scales used in the pharmaceutical manufacturing process.

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 balance and scale criticality, manufacturer recommendations, and regulatory requirements.
   2. Assign unique identification numbers or labels to each balance and scale for traceability.
   3. Document calibration frequency and tolerance limits for each balance and scale.
2. Calibration Process
   1. Retrieve the balance or scale to be calibrated from its designated location.
   2. Verify the balance or scale’s identity and check its condition for any physical damage.
   3. Perform calibration using certified calibration weights 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 a balance or scale is found out-of-tolerance, quarantine it immediately and perform investigation to determine impact.
   2. Take corrective action, recalibrate if possible, or