Specifications

Section 4. Maintenance, Troubleshooting, and Schematics
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 (item #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 (item #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 HMP50-ET temp/RH probe. Sensor will tend to
drift up over time giving readings higher then 100%. Replace RH chip
(item# 9598) if necessary (see Figure 4.1-1 and Section 4.1.4.1).
• Replace desiccant in enclosure housing as needed.
Shipping Cap
(remove prior
to installation)
Protective Cap
and Filter
9598 RH Chip
FIGURE 4.1-1. Exploded View of HMP50-ET (as shipped)
4-3