PWS100 Present Weather Sensor - Campbell Scientific
PWS100 Present Weather Sensor - Campbell Scientific
PWS100 Present Weather Sensor - Campbell Scientific
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Section 6. Installation<br />
In order to minimize user interaction with the unit, the <strong>PWS100</strong> should be<br />
placed away from sources of contamination, in the case of roadside monitoring,<br />
larger mounting poles can be used. More regular maintenance will be required<br />
when the instrument is placed in areas where contamination is unavoidable or<br />
where measurements may be safety critical.<br />
The orientation of the unit should be such that the horizontal sensor head points<br />
north in the northern hemisphere and south in the southern hemisphere. The<br />
angle of inclination of the second sensor head is such that the deviation from<br />
north/south orientation causes no increase in system noise.<br />
High frequency light sources can lead to increased system noise and hence<br />
erroneous weather classification and so the <strong>PWS100</strong> should be positioned in a<br />
location where such interference is minimized. Ideally this should be a<br />
minimum of 100 m from the nearest high frequency light source, with the<br />
sensor heads pointing away from the light source. In any case the sensor heads<br />
should be positioned to be away from any high frequency light source.<br />
Avoid locations where the transmitter is pointing at a light scattering or<br />
reflective surface.<br />
WARNING<br />
When installing the sensor, avoid pointing the laser<br />
housing toward areas where binoculars are commonly<br />
used.<br />
6.2 Unloading and Unpacking<br />
6.2.1 Unpacking Procedure<br />
To be at any risk from the laser light source, the operator must look directly<br />
down the beam of light and must be at the same height and in exact alignment<br />
with the sensor. In addition, the beam diverges slightly so the risk decreases<br />
with distance from the sensor.<br />
Depending on the power and mounting options selected for the <strong>PWS100</strong> there<br />
will be up a number of boxes containing the PWS sensor unit, power supply/<br />
external communications enclosure and grounding equipment.<br />
CAUTION<br />
Handle the boxes carefully, taking care not to drop them as<br />
the sensor can be damaged if dropped.<br />
Unpack the boxes carefully and check the contents, ensuring that the contents<br />
match those listed on the packing slip. Carefully remove the items and replace<br />
all packing materials back into the empty boxes and store in case the unit is<br />
required to be repacked for shipping.<br />
6.2.2 Storage Information<br />
The <strong>PWS100</strong> should be stored between -40° to +70°C in a dry place,<br />
preferably with the enclosures securely fastened with desiccant in place. The<br />
optics should be protected from possible accidental damage.<br />
6-2