SGP/MET/E9 - Temperature occasionally failed 6-month field calibration checks

The temperature/humidity sensor was not calibrated annually during this time. The 
temperature reading failed the 6-month field calibration check four times during this period.
Upon removal, the field calibration check reported the temperature sensor may have been 
reading high (< 1 deg C).

In general, the relative humidity may have been subject to drift during this time. The 
manufacturer characterizes sensor drift at <1% / year.

Please contact the mentor for specific information regarding the field calibration 

check results, if necessary.

• vapor_pressure_mean
• rh_mean
• temp_mean