This morning we replaced the Termotek chiller filter, which is responsible to cool the Neovan head. We noticed a increasing trend in the temperature of the amplifier after roughly one week and it was restored to 26 degrees after today's intervention (see attached Figure).
Yesterday morning, during the maintenance we checked the status of the neovan chiller. Despite a small increase in temperature in the last week, the chiller flow was quite low. We then decided to change the filter with a clean one and swap the water cables (thus inverting the flux). Thanks to this, we recover a much better flow (as a reminder, we do not have online data from the chiller), and a result we decreased the NEOVAN head temperature by more than 1⁰C (see fig. 1).
Since yesterday, the temperature is stable as well as the other ISYS channel (in particular, PSTAB rms improved quite a lot compared to the last days, see fig. 2 too).
