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System Operations
3.1.1 Acquisition Unit
The Acquisition Unit (shown in Figure 1-1) acquires, processes, and analyzes vibration data for
fault analysis and balance correction. It provides the necessary interfaces for a variety of vibration
and azimuth sensors, including sensor power. It also has FasTrak and Strobex interfaces. It
executes the SmartChart application programs, and has extensive built-in test, compensation, and
diagnostics.
The AU operates from the aircraft's 28 Vdc power supply, and generates from it the voltages
necessary to operate the Display Unit and serial printer. This allows data to be viewed and printed
on the aircraft.
3.1.2 Display Unit
The Display Unit runs the Windows Display Program, which is the primary user interface to the
VXP system. It connects to the AU via its COM1 serial port and the 902-15371 or 902-17317 AU
to DU cable. The Display Program is used to initiate measurements and view data, balance
solutions, and spectrums. File transfers to and from the Acquisition Unit are also accomplished via
the Display Unit, the CompactFlash Card Reader and USB Zio! Reader. The Display Unit is
shown in Figure 1-2.
3.1.3 Printer
The printer for the VXP system is a portable thermal printer that connects directly to a dedicated
serial port on the AU via the 902-15371 AU to DU cable. The printer is powered by the AU, but
can also run on its internal Ni-MH battery. The printer can be used to print log files and balance
solutions on the aircraft for easy reference. Refer to section 1.2.3 for a detailed description of the
printer. The printer is shown in Figure 1-3.
The VXP can also be used with a standard parallel printer, such as an inkjet or laser printer. This
would have to be connected to the DU using the parallel port on a Panasonic port replicator, or the
USB port on the DU. The port replicator is available for the DU from Chadwick-Helmuth.
3.1.4 CompactFlash
TM
Drive
The high capacity HP CompactFlash Card for the VXP system is a memory card available in 8 or
16 MB. It is used in conjunction with the Display Unit and Display Program to load and download
data files to and from the Toughbook or desktop PC. It is also used to store data files downloaded
from the AU. It uses Flash RAM format. CompactFlash is compatible with a PCMCIA Card
Adapter. Refer to section 1.2.4 for a detailed description of the CompactFlash Card, PCMCIA
Adapter and Reader/Writer accessories. The CompactFlash Card is shown in Figure 1-4.
3-2
Honeywell
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Troubleshooting
