Chapter 1 ________________________________________________________ General Information
VAISALA_______________________________________________________________________ 15
ESD Protection
Electrostatic Discharge (ESD) can cause immediate or latent damage to
electronic circuits. Vaisala products are adequately protected against ESD
for their intended use. However, it is possible to damage the product by
delivering electrostatic discharges when touching, removing, or inserting
any objects inside the equipment housing.
To make sure you are not delivering high static voltages yourself:
- Handle ESD sensitive components on a properly grounded and
protected ESD workbench. When this is not possible, ground yourself
to the equipment chassis before touching the boards. Ground yourself
with a wrist strap and a resistive connection cord. When neither of the
above is possible, touch a conductive part of the equipment chassis
with your other hand before touching the boards.
- Always hold the boards by the edges and avoid touching the
component contacts.
Regulatory Compliances
The AviMet systems are designed according to the recommendations of
international air traffic authorities as presented in the following sources.
The algorithm used for calculations in the Vaisala AviMet® Low-Level
Windshear Alert System (LLWAS) is the latest version of the phase III
windshear algorithm developed for the U.S. Federal Aviation
Administration (FAA) by UCAR:
- United States Patent number 5,221,924: "Wind shear alert system",
W. Wilson, UCAR, CO.
- United States Patent number 5,208,587: "Low level wind-shear alert
system", L. Cornman, UCAR, CO.
- FAA LLWAS-III Specification.
The wind sensors of the LLWAS system are positioned and implemented
in accordance with the M.I.T., Lincoln Laboratories and the National
Center for Atmospheric Research system design guidelines specified in:
- Siting Guidelines for Low Level Windshear Alert System (LLWAS)
Remote Facilities. FAA Document Nr 6560.21A.
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