Search found 135 matches

by Maciek Szymanski
Tue Mar 02, 2021 10:47 pm
Forum: Control and Instrumentation Hardware and Software
Topic: Software to collect and display measured data.
Replies: 16
Views: 1258

Re: Software to collect and display measured data.

As I tend do everything oldshool, analog way, I’m using Siemens C1012 two channel chart recorder: 447C459B-E242-446E-BE6C-1D05A43333FE.jpeg Works great for me - each channel is selectable AC/DC, current/voltage with many ranges. Paper speed is adjustable and I can take notes and make marks on on it ...
by Maciek Szymanski
Sun Feb 28, 2021 7:14 pm
Forum: Vacuum Technology (& FAQs)
Topic: Help me in my baby steps in the vacuum world.
Replies: 17
Views: 1919

Re: Help me in my baby steps in the vacuum world.

In fact I won’t be surprised if those expensive oils are the exactly the same product as the mass produced industrial oils just repackaged and rebranded by Kurt Lesker, Varian or Alcatel...
by Maciek Szymanski
Sun Feb 28, 2021 6:38 pm
Forum: Vacuum Technology (& FAQs)
Topic: Pirani gauge vs plasma
Replies: 5
Views: 572

Pirani gauge vs plasma

I’ve a question to those with pirani gauges experience. For the demo fusor at work I’ve used the thermoelectric gauges but in my garage setup (https://fusor.net/board/viewtopic.php?f=10&t=13708) I’m using the double head pirani. Today I’ve made some test discharges at low vacuum (1e-2 to 5e-5 Torr) ...
by Maciek Szymanski
Sun Feb 28, 2021 6:19 pm
Forum: Vacuum Technology (& FAQs)
Topic: Help me in my baby steps in the vacuum world.
Replies: 17
Views: 1919

Re: Help me in my baby steps in the vacuum world.

Today I’ve changed oil in my BL8 rotary vane pump (the description of the vacuum system is in the separate topic: https://fusor.net/board/viewtopic.php?f=10&t=13708). I’ve used the cheap industrial grade VG68 class oil for milking machine pumps: 640F0BFC-3FF4-49F3-B815-8148B06F3897.jpeg On the new o...
by Maciek Szymanski
Sat Feb 20, 2021 7:50 pm
Forum: High Voltage - Fusor Input Power (& FAQs)
Topic: 5kV multipurpose power supply
Replies: 1
Views: 683

5kV multipurpose power supply

For some time I was building a power supply for my garage fusor and other plasma experiments. This is a demo grade PSU based on the step up transformer from an old breakdown tester. I’ve bought the complete tester quite cheaply and scavenged the trafo, a very nice variable auto transformer and some ...
by Maciek Szymanski
Sat Feb 20, 2021 6:31 pm
Forum: High Voltage - Fusor Input Power (& FAQs)
Topic: 60Hz, 22kV transformer
Replies: 2
Views: 320

Re: 60Hz, 22kV transformer

Unfortunately I don’t have even single shed full of HV power supplies, so probably I will end winding my own transformer. Regarding the voltage multiplying - I’m not planing any. I hope that magnetic assistance/ion sources will compensate for the low end performance of the planned PSU. And in the wo...
by Maciek Szymanski
Fri Feb 19, 2021 7:29 pm
Forum: High Voltage - Fusor Input Power (& FAQs)
Topic: 60Hz, 22kV transformer
Replies: 2
Views: 320

60Hz, 22kV transformer

I’ve just assembled a HV power supply for demo fusor/general plasma experiments. This is 5kV supply based on the breakdown tester transformer. I’ll post the details when I’ll do the load measurements, so I can report the detailed performance. 1CCF5131-F36E-4EE3-AA21-AD9DFE40A320.jpeg The small 5kV s...
by Maciek Szymanski
Sat Feb 06, 2021 10:00 pm
Forum: Vacuum Technology (& FAQs)
Topic: Help me in my baby steps in the vacuum world.
Replies: 17
Views: 1919

Re: Help me in my baby steps in the vacuum world.

For first tests I would try any inexpensive industrial vacuum pump oil like Total Agritraite 68. Or this one: https://www.ebay.es/itm/ACEITE-BOMBA-VACIO-VACUUM-PUMP-OIL-SUNOCO-1000ml-REFRIGERACION/323956124731?hash=item4b6d4a2c3b:g:qRIAAOSwJ9VdrzkT Regardin the piston/rotary question - for me the sh...
by Maciek Szymanski
Sat Feb 06, 2021 10:15 am
Forum: Vacuum Technology (& FAQs)
Topic: Help me in my baby steps in the vacuum world.
Replies: 17
Views: 1919

Re: Help me in my baby steps in the vacuum world.

There are super expensive, very low vapor pressure oils offered by vacuum companies like Varian or Leybold. And a lot of generic vacuum pump oils for industrial use (milking, vacuum packaging, handling, HVAC). Until you don’t expected your pump to work on the limit of it’s performance (and this requ...
by Maciek Szymanski
Thu Feb 04, 2021 6:18 pm
Forum: Vacuum Technology (& FAQs)
Topic: Bell and whistles diffusion pump based vacuum system.
Replies: 37
Views: 5030

Re: Bell and whistles diffusion pump based vacuum system.

The oil is fresh DC704 and the whole system is cleaned and overhauled. I don’t believe this ultimate pressure, it seem to me as gauge fault. I’m using very similar system at work (same pumps and valves) and it routinely pumps down to 1e-6 mBar (7.5e-7 Torr) but it takes a bit longer.