SGP/SURTHREF/C1 - Sensors out of calibration

In Nov. 2011, RH values were noticed to be out of agreement with each other. It was found 
that the sensors had not been through annual calibrations (some had not been calibrated 
since 2008). Beginning Dec. 2011, sensors were swapped and calibrated as needed. As of 
7/2/2012, all 6 sensors are up to date on calibrations.  

V2 replaced 12/12/2011. V1/V3/R2 replaced as of 01/24/2011. R1 replaced 4/23/2012. R3 
replaced 7/3/2012.

No workaround, but keep calibration dates in mind when scrutinizing data disagreements.

• Vaisala probe 1 average RH(RH_V1_avg)
• Vaisala probe 1 RH minimum(RH_V1_min)
• Rotronic probe 3 RH minimum(RH_R3_min)
• Rotronic probe 3 average RH(RH_R3_avg)
• Vaisala probe 3 RH standard deviation(RH_V3_std)
• Rotronic probe 1 RH minimum(RH_R1_min)
• Rotronic probe 1 average RH(RH_R1_avg)
• Vaisala probe 3 RH maximum(RH_V3_max)
• Vaisala probe 2 average RH(RH_V2_avg)
• Vaisala probe 2 RH minimum(RH_V2_min)
• Vaisala probe 1 RH maximum(RH_V1_max)
• Rotronic probe 2 RH standard deviation(RH_R2_std)
• Vaisala probe 1 RH standard deviation(RH_V1_std)
• Rotronic probe 2 RH maximum(RH_R2_max)
• Rotronic probe 3 RH standard deviation(RH_R3_std)
• Rotronic probe 3 RH maximum(RH_R3_max)
• Vaisala probe 3 average RH(RH_V3_avg)
• Vaisala probe 3 RH minimum(RH_V3_min)
• Rotronic probe 2 RH minimum(RH_R2_min)
• Rotronic probe 2 average RH(RH_R2_avg)
• Vaisala probe 2 RH standard deviation(RH_V2_std)
• Vaisala probe 2 RH maximum(RH_V2_max)
• Rotronic probe 1 RH standard deviation(RH_R1_std)
• Rotronic probe 1 RH maximum(RH_R1_max)