It seem like the sensor correction on ETMX is good. Several times H1:ISI-ETMX_ST2_SENSCOR_X_MATCH_GAIN has been reset to 0, I'm not sure what does this but maybe it is in the safe.snap or in one of the scripts. 

My question for SEI people is:

is there a correct time to turn this on durring the ISI turn on process?  Can we leave it on all the time?  Can we have turning it on be automated?