Campbell Scientific ET107 Evapotranspiration Monitoring Station - Manual (Page 75)

ET107 Weather Station
6 months
• Replace 034B-ET’s anemometer bearings and reed switch if operating
under harsh conditions, such as constant high winds, blowing dust, and/or
salt spray contamination.
1 year
• Replace 034B-ET wind speed (anemometer) bearings (pn 3648). To send
the sensor to Campbell Scientific for bearing replacement call for Return
Material Authorization number or contact Campbell Scientific for bearing
cost to replace bearings in the field.
• Replace 034B-ET wind speed (anemometer) reed switch (pn 13764) if
needed. To send the sensor to Campbell Scientific for reed switch
replacement call for Return Material Authorization number or contact
Campbell Scientific for reed switch cost to replace reed switch in the field.
• Check calibration of the HMP60-ETS Temp/RH probe. Sensor will tend to
drift up over time giving readings higher than 100%. Replace RH chip
(pn 9598) if necessary (see FIGURE 4-1 and Section 4.1.4.1, Procedure
for Removing RH Chip).
ET107 stations began shipping January 2014 with an updated gill
radiation shield with knurled thumb screws, using the HMP60-
ETS Temp/RH sensor. All information in this document is also
pertinent for the HMP50-ET, HMP60-ET, and HMP60-ETR
sensors.
• Replace desiccant in enclosure housing as needed.
FIGURE 4-1. Exploded view of the temperature and RH sensor
(adapter not shown)
NOTE
Protective Cap
and Filter
Shipping Cap
(remove prior
to installation)
9598 RH Chip
65