Standard Operating Procedure for Calibration of Conductivity Meters

1) Purpose

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

2) Scope

This SOP applies to all conductivity meters 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 meter criticality, manufacturer recommendations, and regulatory requirements.
   2. Assign unique identification numbers or labels to each conductivity meter for traceability.
   3. Document calibration frequency and tolerance limits for each conductivity meter.
2. Calibration Process
   1. Retrieve the conductivity meter to be calibrated from its designated location.
   2. Verify the meter’s identity and check its condition for any physical damage.
   3. Prepare calibration standards of known conductivity values.
   4. Calibrate the meter using certified calibration standards and procedures.
   5. Record calibration results including before and after values, adjustments made, and calibration date.
   6. Apply calibration labels indicating next due date and calibration status.
3. Out-of-Tolerance Conditions
   1. If a conductivity meter 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