Description: | The THWAPS humidity sensor output was scaled so that the instrument output voltage range
(0-1VDC) represented 0-100 %RH. Comparisons with the co-located chilled mirror sensor at
the CF suggested that the THWAPS RH sensor was reading artifically low at high humidities
because of this 100 %RH maximum.
The scaling of the system was changed so that 0-1 VDC now represents 0-110 %RH. This
resulted in a slight loss of precision in the measurements, but since the RH measurement is
only accurate to 2-3 %RH at best, this isn't a significant problem.
The saturation vapor correction when temps are below 0C contained an error in the
multiplier. The incorrect multiplier only equates to an error of 0.01 kPa which is less than the
stated uncertainty of the measurement (+/- 0.035 kPa). |