C Compton, R Savage, J Oberling 

The FSS now seems to be locking much better. (The initial problem was recorded in alog 55476.)

We have reduced the PZT ramp frequency from 20Hz to 10Hz,  the PZT range has been decreased to from +/- 12 to +/- 8V  and we have changed the phase from 35deg to 0deg. 

Additionally, we have increased the temperature search ramp range from 0.32-0.42 to 0.27-0.47K.  All these channels can be seen at sitemap > PSL > FSS > MANUAL.

 

It is thought that the slower PZT ramp gives the temperature more time to adjust. These values are mostly copied from Livingston's FSS system which has no trouble locking currently. The autolocker is still not completely understood and  we hope to spend more time lookng at this another Tuesday. 

It still stands that if operators have trouble locking the FSS, they should try the things suggested by Jason's alog 54467 and call Jason or Rick if nessasasry. TAGGING OPSINFO