Search found 1398 matches: safety

Searched query: +safety

by Dennis P Brown
Tue Aug 22, 2017 12:54 pm
Forum: High Voltage - Fusor Input Power (& FAQs)
Topic: Addressing HV safety excursions: Oh Yikes what do I do?
Replies: 11
Views: 1142

Re: Addressing HV safety excursions: Oh Yikes what do I do?

I have small copper screens over both my simple TC gauge and my ion gauge ports; discovered the hard way (not unlike you; and all my equipment has two independent ground points) that my plasma could see the grounds inside these gauge tubes - lucky, no costly failures.
by ian_krase
Mon Aug 21, 2017 7:37 pm
Forum: High Voltage - Fusor Input Power (& FAQs)
Topic: Addressing HV safety excursions: Oh Yikes what do I do?
Replies: 11
Views: 1142

Re: Addressing HV safety excursions: Oh Yikes what do I do?

Ok, I'll look into that.

And I'm guessing that then at some point HV jumped to "ground" which wasn't really grounded and jumped between all the equipment, triggering resets of microprocessors?
by Geoffrey Thomas
Mon Aug 21, 2017 5:23 pm
Forum: Images du Jour
Topic: Geoffrey Thomas First Plasma
Replies: 1
Views: 405

Geoffrey Thomas First Plasma

... have 4 high frequency modern 40kv 1kw supplies I salvaged from a giant CO2 laser, but I don't want to use them on this small glass chamber for safety reasons. The pump is a Welch duoseal 1400 that I built from three separate 1400's that were in various states of damage and were being thrown ...
by John Futter
Mon Aug 21, 2017 9:21 am
Forum: High Voltage - Fusor Input Power (& FAQs)
Topic: Addressing HV safety excursions: Oh Yikes what do I do?
Replies: 11
Views: 1142

Re: Addressing HV safety excursions: Oh Yikes what do I do?

it just means that the ion gauge controller is probably not earthed
suspect mains wire
do a continuity check between controller and star point ---beware of painted chassis earths lifting the chassis away from what you think it is
by John Futter
Mon Aug 21, 2017 3:32 am
Forum: Vacuum Technology (& FAQs)
Topic: Noisy Edwards EXT250 Pump
Replies: 22
Views: 2638

Re: Noisy Edwards EXT250 Pump

... relabeled Micro Seiki or Seiko Seiki pumps from Japan We had a mass spec that used these pumps and they screamed right from new In fact Health and safety came in and made everybody in the lab wear earmuffs. We did a minor CAPEX and replace all of them with Phiffer turbos and sold the Seiko Seiki's ...
by ian_krase
Sun Aug 20, 2017 10:38 pm
Forum: High Voltage - Fusor Input Power (& FAQs)
Topic: Addressing HV safety excursions: Oh Yikes what do I do?
Replies: 11
Views: 1142

Re: Addressing HV safety excursions: Oh Yikes what do I do?

I have a star ground with my high vacuum pump as the star point.

Sparks were coming off of the outside of my ion gauge controller, which was sitting on top of my HV power supply.
by Bob Reite
Sun Aug 20, 2017 9:53 pm
Forum: High Voltage - Fusor Input Power (& FAQs)
Topic: Addressing HV safety excursions: Oh Yikes what do I do?
Replies: 11
Views: 1142

Re: Addressing HV safety excursions: Oh Yikes what do I do?

What specific piece of equipment had sparks coming from the corners? Is your grounding arrangement a "Star Ground" with the fusor shell the star point? See article http://www.fusor.net/board/viewtopic.php?f=29&t=9968 for a detailed description of a star ground. Note that the diagram there shows a de...
by ian_krase
Sun Aug 20, 2017 10:40 am
Forum: High Voltage - Fusor Input Power (& FAQs)
Topic: Addressing HV safety excursions: Oh Yikes what do I do?
Replies: 11
Views: 1142

Addressing HV safety excursions: Oh Yikes what do I do?

I've been running pretty successfully with an Oil Burner Ignition Transformer, but am trying to get set up with a real HV power supply (one of the Spellman 50kV ones that went for cheap recently). I have my vacuum system, my ion gauge controller chassis, other controller chassis, and my power supply...