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An automatic pumping conversion for the Philips EM‐200
Author(s) -
Meek G. A.
Publication year - 1980
Publication title -
journal of microscopy
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.569
H-Index - 111
eISSN - 1365-2818
pISSN - 0022-2720
DOI - 10.1111/j.1365-2818.1980.tb04099.x
Subject(s) - vacuum pump , materials science , mechanical engineering , nuclear engineering , optics , physics , engineering
SUMMARY A simple commercially available device to prevent accidental backstreaming of vacuum pump fluids into the column of a Philips EM‐200 electron microscope is described. It operates by cycling the rotary pump automatically between selected high and low backing tank pressures.