Campbell CS125, Инструкция по эксплуатации

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CS125 Present Weather Sensor
8
The WMO recommend a sample volume height of 1.5 m. However, for
applications such as aviation or road visibility other heights may be appropriate.
If operating a CS125 indoors it is likely that there will be sources of
light and/or reflections that will create false readings and erratic
results.
If carrying out simple checks, blocking a lens or the sample volume
will simulate an INCREASE in visibility not a decrease.
7.1 Equipment grounding
The CS125 must be properly grounded. It is sufficient to ground the mounting
bracket and if the CS125 is connected to a grounded metal mast, and in electrical
contact with it, then this will be sufficient. Otherwise, the mounting bracket
should be earthed and a grounding boss is supplied to allow this.
A ground wire with a minimum cross section of 6 mm
2
and maximum length of
5 m should be used.
The pole and foundations of a pole mounted installation will provide some basic
lightning protection and protection against radio frequency interference and
should also be correctly grounded.
Figure 7-2. Grounding boss
NOTE
NOTE