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Leica S430 Scanning Electron Microscope (view source)
Revision as of 23:46, 4 November 2021
, 23:46, 4 November 2021no edit summary
|certification=yes
|certification=yes
|hackable = NO
|hackable = NO
|where = Removed
|model = Leica Stereoscan 430
|model = Leica Stereoscan 430
|serial = 430-02-01
|serial = 430-02-01
|arrived = 3/23/2013
|arrived = 3/23/2013
|contact = Ryan Pierce
|contact = Ryan Pierce
|value = $100,000.00
|value = $100,000.00
}}
}}
'''This machine has moved to [http://www.analyticslounge.org/ Analytics Lounge] per [https://wiki.pumpingstationone.org/Vote_to_Donate_SEM this vote], so it is no longer available at PS:One. This page remains because it may still contain useful information'''
== Configuration ==
== Configuration ==
|-
|-
|[[User:ad9581|Arturo Duarte]]
|[[User:ad9581|Arturo Duarte]]
|Ryan Pierce
|-
|Melody Snyder
|Ryan Pierce
|-
|Sache
|Ryan Pierce
|-
|Scott Anamizu
|Ryan Pierce
|Ryan Pierce
|}
|}
|-
|-
|EDX
|EDX
|08:00:09:51:95:28
|08:00:09:51:A5:28
|10.100.0.41
|10.100.0.41
|}
|}
* 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 ===
! Maintainer
! Maintainer
! Description
! Description
|-
|10/30/2014
|Ryan Pierce
|Shut down SEM for repair of the rotary vane pump. Vented chamber. Removed all samples. Disconnected rotary vane pump. Disconnected electrical power. The rotary vane pump is exhibiting signs of overheating, scorching the oil, making very loud, regular clacking noises in time with the pump stroke, emitting a scorched oil odor, possibly allowing oil vapors to escape back up the line when the pump is turned off, and may have a small oil leak.
|-
|9/20/2014
|Ryan Pierce
|Finished vacuum system repair. Had previously replaced the air admit solenoid with an Edwards C41723000 24V NO solenoid. This produced a vacuum around 1.03e-5 torr. Added custom made adapter from NW10 flange to the fitting on the old solenoid that attached to the air dryer. This adapter was made by cutting apart the old solenoid, TIG welding a pipe compression fitting, which mechanically held the hose fitting. This was not airtight, so was sealed with epoxy. Chamber now vents properly and holds a vacuum. Re-assembled desk. Dried silica gel in an electric oven at slightly under 200F for several hours in a baking dish, stirring periodically, until bright blue color returned, and re-assembled air dryer assembly. Noted oil in rotary vacuum pump was running low, topped it off.
|-
|-
|6/15/2014
|6/15/2014
|}
|}
[[Category:Science]]
[[Category:Removed Equipment]]