LN2 consumption is derived from the liquid level of the storage dewar. Nominal rates across the site are usually around 1%/day. CP3 failed Dec21/22 2015.

Plots for Nov 2015, and April 2016 show rates of 1.07%/day and 1.25%/day. The plot for Feb 2016 shows a noisy signal. For May 2017 we get 1.25%/day

The increase in consumption in the period may be due to the manual filling operation or a loss of vacuum in the CP3 dewar insulating jacket.

A liquid nitrogen delivery in December made the dewar level signal noisy for a while.