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Chapter 5 Calibration
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National Instruments Corporation 5-3 PCI-4451/4452 User Manual
you can save the results in the EEPROM, so you should not have to perform
an external calibration very often. You can externally calibrate your device
by calling the NI-DAQ calibration function. To externally calibrate your
device, be sure to use a very accurate external DC reference. The reference
should be several times more accurate than the device itself. For example,
to calibrate the PCI-4451/4452, 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-4451/4452 back to
National Instruments. The device will be sent back to you with a new
calibration certificate. A detailed report may be requested for an additional
fee. 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-4451/4452 at your location (on-site). You can also send out your
PCI-4451/4452 for recalibration by a third party. Please contact National
Instruments for approved third-party calibration service providers.
User.book Page 3 Tuesday, April 14, 1998 10:20 AM