Chapter 5
Calibration
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National Instruments Corporation
5-3
PCI-4451/4452/4453/4454 User Manual
accurate external DC reference. The reference should be several times more
accurate than the device itself. For example, to calibrate the PCI-445X, the
external reference should have a DC accuracy better than ±115 ppm
(±0.001 dB).
Traceable Recalibration
Traceable recalibration is divided into three different areas—factory,
on-site and third party. Devices typically require this type of recalibration
every year.
If you require factory recalibration, send your PCI-445X back to National
Instruments. National Instruments will send the device back to you with a
new calibration certificate. Please check with National Instruments for
additional information such as cost and delivery times.
If your company has a metrology laboratory, you can recalibrate the
PCI-445X at your location (on-site). You can also send out your PCI-445X
for recalibration by a third party. Please contact National Instruments for
approved third-party calibration service providers.
Calibration documentation and function libraries are available online at
www.ni.com
