Verify temperature accuracy at commissioning, after any relocation, and any time the chamber has been serviced, adjusted, or shows behavior that could affect specimen conditioning. After that, set a routine verification interval that matches your Charpy method requirements and your lab’s quality system, then recalibrate whenever the verification check indicates drift outside your acceptance criteria.

In practice, field verification is typically done by comparing the chamber’s indicated temperature to a traceable reference sensor placed where specimens are conditioned, then checking stability at the setpoints you actually run. This is especially important when you rely on tight control for Charpy conditioning, since the NG-ISCC Series is built around a self-adjusting controller and a temperature sensor to maintain consistent setpoints.

You may want to shorten your verification interval when any of the following apply:

• High test volume or frequent door openings
• Regular operation at the coldest setpoints for your model
• Audited work, customer flowdowns, or critical weld procedure qualification programs
• Any change to the cooling medium, loading pattern, or operating practices

If you want to align your verification and recalibration plan to your exact NG-ISCC model and your ASTM E23 or ISO 148 workflow, use learn more and request a quote.