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  1. trihydrate

    DMM read 142.2 V on nom 120 V source w/ poor conn.

    I worked on a 120 VAC system that had a water conductivity instrument with a 125 mA time delay fuse that had been blown. I first replaced the instrument and after 30 hours, the second instrument's fuse had blown. A 250 mA fuse was installed and it blew immediately. I placed a DMM on the power...
  2. trihydrate

    NPSM Hex Nut Source

    Does anyone know of a source of 18-8 stainless 1/4 - 18 NPSM Hex Nuts? Machinery Handbook defines NPSM(National Pipe Straight Mechanical), but they seem to be a bit rare. I need a few(7) for a prototype. Thanks for the help.
  3. trihydrate

    DESIGN A SYSTEM TO MOVE A VACUUM FILTER

    I have to design a system to move a vacuum filter, weighing approximately 200 lbs., along an overhead track, stopping at four locations along a 25 foot travel. The four stops will not be in sequence and some will be visited more than others. The system has a duty cycle of only 2 - 5%. The...

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