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Re: Diffusion pump set-up

Posted By: SVP Neon Equipment
Date: Monday, 7 August 2006, at 9:39 p.m.

In Response To: Re: Diffusion pump set-up (John Anderson)

We sell a nice little temperature sensor strip that attaches to the diffusion pump body just below the bottom cooling chamber in the area John is talking about, where the oil should be cascading. You adjust the heater control until the appropriate temperature is achieved on the strip. Cost: $6.00. Email me if you are interested.

It may be a few days before I can respond. We lost our internet connection during a bad storm and they said it may be a few days before it's back up. I'm on someone else's computer right now.

Mark

> All things equal, you can usually see the
> oil condensing around 1 inch beyond the
> nozzle for an oil dif pump using DC704 or
> 705. If it's condensing further up toward
> the top, back off the heat - it's too high.
> If it's just barely clearing the nozzle,
> turn it up some.

> You'll notice that in warmer weather the
> cascading is less evident and distinct. A
> small cooling fan on unit will help this.

> You won't see any cascading until the dif
> pump has reached it's critical kick-in
> pressure - usually around 50 microns. Once
> it does kick in, you should see a dramatic
> plunge in pressure on your gauge.

Messages In This Thread

• Diffusion pump set-up -- Mike D. -- Saturday, 5 August 2006, at 7:33 p.m.
  • Re: Diffusion pump set-up -- Travis* -- Monday, 7 August 2006, at 2:50 a.m.
    • Re: Diffusion pump set-up -- John Anderson -- Monday, 7 August 2006, at 9:15 p.m.
      • Re: Diffusion pump set-up -- SVP Neon Equipment -- Monday, 7 August 2006, at 9:39 p.m.
  • Re: Diffusion pump set-up -- Mike D. -- Thursday, 10 August 2006, at 1:01 a.m.

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