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Leica S430 Scanning Electron Microscope (view source)
Revision as of 20:40, 21 September 2014
, 20:40, 21 September 2014→Final Vacuum
* One of the bolts holding the solenoid on was loose. Tightening it didn't seem to be the fix.
* One of the bolts holding the solenoid on was loose. Tightening it didn't seem to be the fix.
* It is likely the solenoid valve leaking. Replacing the solenoid valve with a rubber stopper is the next step to troubleshoot the problem.
* It is likely the solenoid valve leaking. Replacing the solenoid valve with a rubber stopper is the next step to troubleshoot the problem.
Solenoid valve was removed and replaced with a rubber stopper. This clearly fixed the problem, as low 1.0e-5 torr vacuum could be achieved. Attempts to repair the old solenoid were unsuccessful. Solenoid was replaced with a new old stock Edwards C41723000 24V NO solenoid. This required hacking together an NW10 adapter to connect to the air hose leading to the desiccant dryer / filter, and obtaining an NW10 centering ring and clamp.
This adequately solves our vacuum issues. 1e-5 torr is acceptable. In the future, we may attempt treating rubber O rings with vacuum grease in an attempt to improve the final vacuum into the e-6 torr range.
=== Image Processor board loses communications ===
=== Image Processor board loses communications ===