> For the complete documentation index, see [llms.txt](https://doc.cydiance.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://doc.cydiance.com/faq/calibration-and-traceability.md).

# Calibration and traceability

### How do we maintain NIST traceability?

We have deployed 2 policies to maintain the NIST traceability. 

We use digital temperature sensors, which are manufactured by Texas Instrument (TI). TI works according to its own Quality Control Plan and maintains calibration equipment traceable to NIST.

Besides, Cydiance processes 3 points calibration inspection at the PCBA stage, with its equipment calibrated by accredited NVlap laboratories and a sampling base according to AQL0.25 General I. All records are input into the ERP system and are presented in the manufacturer's COC.

![NIST traceable equipment and manufacturer's COC](/files/GdqEVQPxeXBEBYB0f04G)


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