5.2.5 Temperature Measurement
In order to obtain the true mass of water collected and the desired value of the volumetric flow, buoyancy effects are needed. This means that temperatures of the water and the pressure and temperature and humidity of the room air is required for density computations.
36
Temperature measurements are made of the flowing liquid and of the atmospheric conditions surrounding the weighing system. These measurements are made using calibrated thermistors placed at various locations along the water flow path and a Keithley Model 224 current source, a Keithley Model 7001 switch system, and a Keithley Model 2002 Multimeter . One sensor is located immediately upstream of the MUT and two are inside of the weigh tank.