INSTALLATION GUIDE AND SPECIFICATIONS
PXIe-4844
This document includes the installation instructions and specifications for the National
Instruments PXIe-4844 Optical Sensor Interrogator (OSI) module. The PXIe-4844 is a dual-slot,
3U PXI Express data acquisition module for fiber Bragg grating (FBG) optical sensors. The
PXIe-4844 provides four optical channels that are simultaneously sampled at 10 Hz, and is
expandable to eight or 16 channels with an external optical multiplexer.
FBG fiber optic sensing provides many benefits over conventional electrical sensing because it
is nonconductive, electrically passive, and immune to EMI. FBG technology also enables
measurements over long distances without loss of signal accuracy and provides the ability to
daisy-chain dozens of sensors along a single optical fiber. The PXIe-4844 requires no calibration
as it continuously adjusts its measurements using an on-board NIST traceable wavelength
reference.
Caution
This icon denotes a caution, which advises you of precautions to take to
avoid injury, data loss, or a system crash.
Safety Guidelines
Follow these guidelines when installing and using the PXIe-4844.
Caution
Do
not
enable the laser unless an optical connector or LC/APC connector
cover is connected to the LC/APC connector port. The laser enables when the device
receives power.
Caution
Never
look into the end of an optical cable attached to an optical output
when the device is powered on. The laser radiation is not visible to the human eye,
but it can seriously damage your eyesight.
Caution
Do
not
modify the PXIe-4844 module. This may result in hazardous
radiation exposure from the laser source.
Caution
The protection provided by the PXIe-4844 can be impaired if it is used in
a manner not described in this document.
