Calibration, verification, and repair are distinct processes used in the maintenance and assurance of measurement instruments and devices. Here are the differences:

Calibration

• Definition: Calibration is the process of configuring an instrument to provide a result for a sample within an acceptable range. It involves comparing the measurements of a device against a known standard to detect and correct any deviations.

• Purpose: The main goal is to ensure the accuracy and precision of the measurements provided by the instrument.

• Procedure: This typically involves adjusting the instrument to match the known values provided by a calibration standard. If the instrument reads a known reference value correctly, it is considered calibrated.

• Example: Adjusting a thermometer to ensure it reads 100°C when immersed in boiling water at standard atmospheric pressure.

Verification

• Definition: Verification is the process of checking that an instrument or system meets specified requirements or standards. It is a broader check than calibration and does not necessarily involve adjustment.

• Purpose: The goal is to confirm that the instrument is operating correctly and producing valid results within the specified limits.

• Procedure: Verification may involve using the instrument to measure known reference values and comparing the results to acceptable criteria. It confirms that the device has not drifted out of its required accuracy.

• Example: Checking that a scale accurately measures a standard weight without making adjustments to the scale itself.

Repair

• Definition: Repair involves fixing or replacing parts of an instrument to restore it to proper working condition. This process addresses issues that prevent the instrument from functioning correctly.

• Purpose: The main aim is to restore the instrument to its operational state, ensuring it works as intended.

• Procedure: Repair might involve diagnosing faults, replacing damaged or worn-out parts, and ensuring the instrument can perform its intended function.

• Example: Replacing a faulty sensor in a digital thermometer that consistently provides incorrect readings.

Summary

• Calibration adjusts the instrument to ensure it provides accurate measurements by comparing it to a known standard.

• Verification checks that the instrument meets required specifications and standards without necessarily making adjustments.

• Repair involves fixing any defects or malfunctions in the instrument to restore its proper operation.

These processes are often sequential: an instrument may be verified to see if it meets standards, calibrated if it does not, and repaired if it is found to be faulty.

What now?

Calworld Technologies offers reliable calibration and verification services that guarantee dependable readings and measurements. All our calibrations are carried out in accordance to national and international standards, such as ISO 17025. Our friendly team also works hard to maintain our promised service (affordability, convenient scheduling, 24-hr certification turnaround time). Contact us via email or phone to learn more!