Rogowski Calibration Service
Calibration is a cornerstone of PEM’s commitment to delivering high-quality Rogowski current probes.
At PEM, we recognise that precise current measurements are critical in applications from power system analysis to industrial process control. Our initial factory probe set-up and calibration process combines a number of adjustments and functional checks, typically including SNR and both low and high frequency operation, to ensure the probe is operating as specified over a wide-bandwidth. Any probes returned to PEM for re-calibration, or repair, undergo the same process to rigorously check performance. Our factory calibration certificate, supplied with every unit, includes details of the principle low frequency measurement and the fully traceable equipment used to undertake the calibration.
PEM are not ISO17025-certified, but we work closely with an external accredited third party laboratory and can arrange for either new or returned probes to be calibrated to ISO17025 standards, and provide corresponding certification, in addition to our standard factory certificate.
Why Calibration Matters
Our calibration process serves several essential functions:
- Performance Verification
It confirms that each probe meets or exceeds our published specifications, ensuring accuracy and reliability.
- Quality Control
Calibration serves as a final check in our manufacturing process, identifying any deviations before products reach our customers.
- Traceability
We maintain a clear link between our measurements and recognized national standards, so you can trust that our products meet high industry benchmarks.
- Consistency
Calibration guarantees that all PEM probes of the same model will perform similarly, providing reliable results over time.
Calibration Recommendations
Our calibration philosophy accounts for the diverse and sometimes challenging environments in which Rogowski coils operate. For most applications, PEM recommends calibrating Rogowski probes every two years. Thanks to the stable coil geometry and robust passive components, calibration drift over this period is typically minimal.
Note: In harsher environments, where coils are subjected to significant mechanical stresses or extreme temperatures, calibration drift may be more pronounced. For coils used in these conditions, we recommend an annual calibration to maintain accuracy and performance.
Getting Support
Before sending your probes for calibration, please reach out to our after-sales team at [email protected] for further instructions. For troubleshooting and more details on calibration best practices, refer to our Troubleshooting Guide. This guide can assist with common calibration issues and maintenance tips to ensure optimal performance of your PEM Rogowski coils.
Our commitment to calibration reflects our dedication to quality and customer satisfaction. By following our recommended calibration schedule, you can be confident in the ongoing accuracy and reliability of your PEM probes.
