WP7388 TCS CO2 laser summing chassis

Richard, Fil, Cheryl, Dave:

While both TCS CO2 lasers were OFF, we installed the new laser summing chassis in the CS CER.

At 14:00 PST I stopped h1tcscs from driving the ITM[X,Y] chiller setpoint control voltages. Soon after, Fil installed the summing box (D1500265) in the path between the tcs AI chassis and the ITMX and ITMY chiller units on the mech room mezzanine.

From 14:05 to 15:15 we ran the chillers in this mode. The chillers LCD display show the temperature setpoints for ITMX and ITMY to be 19.6C and 19.5C respectively.

The laser head temperatures reached an equilibrium value after about 45 minutes.

WHILE WE ARE TESTING THE SUMMING BOX AND CALIBRATING THE H1TCSCS MODEL, THE DAC OUTPUT SHOULD NOT BE TURNED ON.