Experiencing wildly different volume values because of fluctuating blood resistivity measurements during volume conversion?

Precise valid blood resistivity readings require the Rho cuvette to be at the set constant temperature just before measurement. Note that the temperature may sharply decrease depending on the room temperature, once the Rho Cuvette is removed from its warming source (i.e. a heated water bath). Therefore, the Rho Cuvette can be heated several degrees higher than the set temperature, allowing sufficient time for the transfer of the blood sample.