Appendix C Technical Support and Professional Services
NI USB-621x User Manual C-2 ni.com
• Calibration Certificate—If your product supports calibration,
you can obtain the calibration certificate for your product at
ni.com/
calibration
.
If you searched
ni.com and could not find the answers you need, contact
your local office or NI corporate headquarters. Phone numbers for our
worldwide offices are listed at the front of this manual. You also can visit
the Worldwide Offices section of
ni.com/niglobal to access the branch
office Web sites, which provide up-to-date contact information, support
phone numbers, email addresses, and current events.
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