Gill Instruments Ltd
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WindObserver II (WindObserver FC)
Page 12
Issue 2
Doc. No. 1390-PS-0011
June 2007
6.5. Power
supplies
All WindObserver II (WindObserver FC) units
Voltage
20 to 30v DC
Current
60mA max. 50mA average
Heating
The heating module requires a separate power supply.
Either
22 – 30V DC @ 3A
or
24V AC RMS
±
10% @ 3A AC RMS
NOTE: AC Supply must be isolated from Mains Supply
6.6. Mechanical
installation
Before installing, a bench system test is recommended
(see Section 6.2).
All the time the WindObserver II (WindObserver FC) is not in its final
location, it should be protected from damage by keeping it in the original
packaging as long as possible, treating it as a delicate instrument.
Location
It is important to ensure that the WindObserver II (WindObserver FC) is mounted in a
position clear of any structure, which may obstruct the airflow or induce turbulence.
Do NOT mount the WindObserver II (WindObserver FC) in close proximity of high-
powered radar or radio transmitters. A site survey may be required if there is any doubt
about the strength of external electrical noise. (
See Section 6.1)
Orientation
Normally the WindObserver II (WindObserver FC) is mounted vertically with the cable
exit at the bottom.
Alternatively, the unit may be mounted in any orientation, but note that if the unit is
mounted with the cable uppermost, the gasket provided in the mounting kit
must
be used.
Mounting bracket
A suggested mounting bracket is shown in Fig 1 below.
It is recommended that the WindObserver II (WindObserver FC) mounting bracket is
manufactured from stainless steel 316, to prevent possible galvanic corrosion.
It is also recommended that the supplied gasket is always fitted to ensure IP66 rating and
to prevent galvanic corrosion if the mounting bracket is not manufactured from stainless
steel 316.
Stainless steel 316 fixings must be used.
