It has been noticed in the past that ISI's sometimes trip when de-isolating. This causes Guardian to pause and wait for the operator to untrip the watchdog, which gets inconvenient when trying to bring multiple chambers to a de-isolated state. The GS-13s seem to be the main culprit, as the BSC St1's don't seem to trip when de-isolating. We may want to try running the GS-13's in low gain, to reduce the odds of tripping on them. I looked at the perfromance of ITMX ISI with the GS-13's in 3 different states, our nominal high gain mode, low gain and "ultra-low" (see Hugh's post 16416 and subsequent comments by JeffK) . It looks like in an isolated state, none of these configurations hits ADC noise below 100hz (see first attached plot, red is high gain, blue low, green ultra-low, ADC noise is brown(?)), although "ultra-low"  looks like it might be getting close above 100hz where the ISI is not actively isolating. I also looed at the performance of the ISI in the low and high gain states (second figure, dashed are high gain, solid are ultra-low) and it looks like even in ultra-low gain we still have good performance. I looked at HAM6 (third plot, red is high, blue low, green ultra-low, brown is ADC) as well, not in as much detail, but I suspect we could run in low gain on the HAM's, too.