Vaisala WS425FG - Manual (Page 67)

Chapter 6 ______________________________________________________________ Maintenance
VAISALA_______________________________________________________________________ 65
CHAPTER 6
MAINTENANCE
This chapter contains instructions for the basic maintenance, fault
isolation and installation and removal of the field replaceable units of
the Vaisala Ultrasonic Wind Sensor WS425 F/G.
Visual Inspection of Ultrasonic Wind Sensor
WS425 F/G
WS425 F/G anemometer is a very reliable and rugged sensor. It has
been wind tunnel tested to over 175 knots for mechanical integrity.
However, the transducers are constructed of ceramic material and can
be damaged by dropping or hitting the transducers. Likewise, applying
enough force to bend the transducer arms will render the anemometer
inoperative.
The anemometer should be kept in its protective foam shipping
container until the time for the installation on the wind mast or tower.
The verifier should be placed over the sensor when the sensor is
installed on the tower. This provides protection to the transducers,
validates that the mechanical spacing of the transducers is within
specifications, and is the first step for the WATE field validation test
which must be performed next before raising the wind mast or tower.
Some cautions and inspection criteria for the field personnel are listed
below:
1. Do not rotate the transducers. Rotating the transducers will destroy
the array of the ultrasonic anemometer. A soldering spot can be