Campbell Scientific ET107 Evapotranspiration Monitoring Station - Manual (Page 74)

ET107 Weather Station
desiccant packs when the enclosure RH exceeds 50%. The enclosure RH
sensor should be changed every 5+ years.
Desiccant packs may be ordered in quantity of 20 individually sealed packs at a
time (pn 6714) or by the individual pack (pn 4905). Campbell Scientific does
have a $50.00 minimum charge. Any orders under $50.00 require a $15.00
handling fee. Call Campbell Scientific for pricing.
4.1.4 Sensor Maintenance
Sensor maintenance should be performed at regular intervals, depending on the
desired accuracy and the conditions of use. A suggested maintenance schedule is
outlined below. See Appendix A, Maintenance Log, for an example of a
maintenance log file. Log file is for one year of station use.
1 week
• Check the rain gage screen and funnel for debris and level.
1 month
• Check the solar radiation sensor (pyranometer) for level and
contamination. Gently clean with blast of dry air, soft camel hair brush, or
clean water if needed.
Handle the pyranometer carefully when cleaning. Be careful
not to scratch the surface of the sensor.
• Do a visual/audio inspection of the 034B-ET’s anemometer at low wind
speeds. Worn bearings can cause the wind cups to spin in an uneven
manner and/or make a grinding sound.
• Check the WindSonic1-ET for contamination. If needed, gently clean the
WindSonic1 with a cloth and mild detergent.
When cleaning the WindSonic1, do not use solvents and
avoid scratching the sensor.
3 months
• Clean the Gill Radiation Shield by removing the two knurled thumb
screws holding it to the sensor arm. Gently pull the sensor out of the
shield. Clean the gill shield using warm mildly soapy water. Rinse with
clean water and allow the shield to dry before putting it back on the sensor
arm.
• If necessary clean the white filter element on the end of the temp/RH
sensor. To clean the filter, unscrew it from off the end of the sensor and
put it in a cup of CLEAN DISTILLED WATER. Use no soap. Agitate the
filter in the cup of water. Remove the filter and allow to air dry before
putting it back on the end of the sensor.
CAUTION
CAUTION
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