How to Know if Your Equipment Needs Calibration

It does not matter what your application is — if you are relying on instruments, it is essential you keep them properly calibrated. Without calibrated equipment, you cannot expect precise and reliable results. But the problem for most people is, they do not exactly know when their equipment is due for a calibration job.

Here are the key indicators that your equipment requires calibration:

1. Check the Calibration Due Date

Every calibrated instrument should have a calibration label or sticker indicating when it was last calibrated and when the next calibration is due. If your instrument is past its due date, it should be removed from service until it has been recalibrated.

2. Look for Signs of Physical Damage

If an instrument has been dropped, exposed to extreme temperatures, or subjected to any kind of physical shock, its accuracy may have been compromised. Even minor impacts can cause drift in sensitive measurement equipment. Any instrument that has experienced physical trauma should be recalibrated before further use.

3. Compare Readings Against a Known Reference

If you suspect an instrument may be drifting, compare its readings against a known reference standard or another calibrated instrument. Significant discrepancies indicate the instrument needs calibration. This is especially important for critical measurements where accuracy directly affects product quality or safety.

4. Monitor for Inconsistent Results

If an instrument starts producing inconsistent or erratic readings — even when measuring the same item under the same conditions — it may be drifting out of tolerance. Inconsistency is often the first visible sign that calibration is needed.

5. Review After Environmental Changes

Changes in your work environment — such as temperature swings, humidity changes, or relocation of equipment — can affect instrument accuracy. After any significant environmental change, it is good practice to verify your instruments are still reading within tolerance.

6. Follow Manufacturer Recommendations

Instrument manufacturers typically provide recommended calibration intervals based on the expected stability of the device. While these are general guidelines, they serve as a useful starting point for establishing your calibration schedule.

For more information about determining when your equipment needs calibration, contact Custom Calibration at (203) 484-3707 or email info@customcalibration.com.

Custom Calibration provides ISO/IEC 17025 accredited calibration services in North Haven, CT. We offer pickup and delivery, onsite calibration, and fast turnaround times with our Bullseye Guarantee.