SGP/NEPHELOMETER/C1 - Bad NEPH T/RH values from thermal gradients

Due to the thermal inertia of the instrument wall, slow signal response and a radial 
temperature gradient inside the instrument cavity, the reported RH and temperature inside the 
wet nephelometer are off by 2-10% RH and 1-2 degrees C. The radial temperature gradients 
inside the instrument need to be characterized at several locations within the instrument 
with respect to a calibrated Vaisala T and RH sensor at the instrument exit. The 
resulting fRH VAP needs to be recalculated and analyzed.

Do not use data

• Temperature, reference nephelometer inlet(T_Neph_Inlet_Wet)
• Sample temperature inside humidified nephelometer(T_Neph_Wet)
• Relative humidity, Humidograph nephelometer(RH_Neph_Wet)

• Relative humidity at humidified nephelometer inlet(RH_Neph_Inlet_Wet)
• Sample temperature inside humidified nephelometer(T_Neph_Wet)
• Temperature, inside nephelometer(T_Neph_Vol_Wet)
• Relative humidity, Humidograph nephelometer(RH_Neph_Wet)
• Relative humidity, inside reference nephelometer(RH_Neph_Vol_Wet)
• Temperature, reference nephelometer inlet(T_Neph_Inlet_Wet)

• Relative humidity, inside reference nephelometer(RH_Neph_Vol_Wet)
• Relative humidity at humidified nephelometer inlet(RH_Neph_Inlet_Wet)
• Relative humidity, Humidograph nephelometer inlet(RH_NephInlet_Wet)
• Relative humidity, inside Humidograph nephelometer(RH_NephVol_Wet)
• Temperature inside of wet nephelometer inlet(T_NephVol_Wet)
• Temperature at wet nephelometer inlet(T_NephInlet_Wet)
• Temperature, reference nephelometer inlet(T_Neph_Inlet_Wet)
• Temperature, inside nephelometer(T_Neph_Vol_Wet)