PWS100 Present Weather Sensor - Campbell Scientific
PWS100 Present Weather Sensor - Campbell Scientific
PWS100 Present Weather Sensor - Campbell Scientific
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Section 10. Troubleshooting<br />
checked that there are no spider’s webs on the instrument, especially in and<br />
around the detection volume and hoods of the unit. If spider’s webs are present<br />
they should be removed as they can collect condensed water vapor to form<br />
droplets on the strands which may give rise to spurious signals. Secondly<br />
flying insects may cause spurious signals; however these are likely to be<br />
disregarded by the instrument and are unlikely to lead to classification of<br />
precipitation. If insects become a problem then it may be necessary to use<br />
insect deterrents or re-site the instrument away from any areas where insects<br />
gather.<br />
If insects are a persistent problem two other techniques can be used to dissuade<br />
them for living on or near the sensor. One is to spray the baffle plates and end<br />
of the sensor with a waterproof insecticide, taking great care not to spray the<br />
lenses. The insecticide may need to be reapplied on a regular basis. The other<br />
technique is to turn on the hood heaters and adjust the temperature to a high<br />
level which can deter some species. If doing this in summer months it is<br />
advisable to turn off the dew heaters to prevent excess heat building up inside<br />
the sensor housings.<br />
10.2.7 The OS update did not work<br />
Ensure that the upload is not being carried out with an NL100 network link<br />
interface in the communications pathway as this will prevent the OS update<br />
from working due to the NL100 being incompatible with the Xmodem protocol<br />
for the OS download. In such an instance it will be necessary to connect<br />
directly to the <strong>PWS100</strong> with, for example, a laptop computer.<br />
If the OS update fails and there is no physical barrier for the upload, then check<br />
the speed of the communications link. With slow links the system may drop the<br />
connection causing the upload to fail. In this instance try the upload again,<br />
possibly at a time when the communications link may run faster.<br />
If the OS update still fails after checking the above then the OS file may be<br />
corrupt and a new file may be required. Contact <strong>Campbell</strong> <strong>Scientific</strong> if this is<br />
the case.<br />
10-3