We adjusted the pressure on the pwrmtr water circuit from its nominal 5 bar to 4.5 bar. The flow rate to the
laser heads decreased somewhat. Put the pressure back to ~5 bar to set the flow rate in the circuit to be
over 1.25 l/min.
In doing so, the other flow rates seemed to behave as expected. We will monitoring the flow rates and
pressures over the the next few days to see if anything settles out/down.
Jeff, Peter
Have been monitoring the PSL chiller trends during the day. The attached plot is for an 8 hour period. The spikes at 06:50 (PT) are when Peter and I varied the pressures regulators. The pressures and flows have flattened out, which is good. The head flows have also flattened out, which is also good. The head temperatures have been moving around a bit (by 0.1 degree). It appears that varying these pressures regulators may have stabilized the pressure and flows. Will check again in the morning to see if these trends hold.