OT-Hardware?

system · June 26, 2006, 4:25pm

Is your switch powered via a UPS ?

The emi could be coming through the power connection.

Charles

----- Original Message -----
From: Lydia Coffman
To: vantage@yahoogroups.com
Sent: Monday, June 26, 2006 1:50 PM
Subject: RE: [Vantage]OT-Hardware ?

Hello:

In my recent absence, a welding station was set up just outside the closet where one of my HP switches lives. Whenever someone is welding, it causes the switch to "fault" and everyone connected to the network through that switch loses their connection (apprx 8-10 workstations). Then I have to kill their Vantage sessions, they all have to reboot etc...

They are not on the same power panel. I suspect some kind of RF interference. Is there any way to shield my switch, or do they have to move their welding set-up?

We've tested this and it is most definitely the welder.

Any ideas?

Thanks,
Lydia

[Non-text portions of this message have been removed]

[Non-text portions of this message have been removed]

system · June 26, 2006, 2:03pm

Hello:

In my recent absence, a welding station was set up just outside the closet where one of my HP switches lives. Whenever someone is welding, it causes the switch to "fault" and everyone connected to the network through that switch loses their connection (apprx 8-10 workstations). Then I have to kill their Vantage sessions, they all have to reboot etc...

They are not on the same power panel. I suspect some kind of RF interference. Is there any way to shield my switch, or do they have to move their welding set-up?

We've tested this and it is most definitely the welder.

Any ideas?

Thanks,
Lydia

[Non-text portions of this message have been removed]

system · June 26, 2006, 2:09pm

Hi,

You will need some shielding of the switch but you should also check
your cable routing as well and whether this is shielded or not.

--- In vantage@yahoogroups.com, "Lydia Coffman" <lcoffman@...> wrote:
>
> Hello:
>
> In my recent absence, a welding station was set up just outside
the closet where one of my HP switches lives. Whenever someone is
welding, it causes the switch to "fault" and everyone connected to
the network through that switch loses their connection (apprx 8-10
workstations). Then I have to kill their Vantage sessions, they all
have to reboot etc...
>
> They are not on the same power panel. I suspect some kind of RF
interference. Is there any way to shield my switch, or do they have
to move their welding set-up?
>
> We've tested this and it is most definitely the welder.
>
> Any ideas?
>
> Thanks,
> Lydia
>
>
>
> [Non-text portions of this message have been removed]
>

system · June 26, 2006, 2:16pm

Lydia,

You need to move either the switch or the welder. 6 to 10 feet of
open-air separation is desirable (for RFI), along with as much
electrical isolation (different circuit, different panel, different
transformer) as you can get (for EMI). Failing that, have your
maintenance crew drill a hole through the slab at the welder and install
a dedicated ground rod for it.

Your production people will probably fight you tooth and nail on this,
but you will eventually kill your equipment. We regularly had these
battles, until Production kill two embedded NT press brakes by parking
portable migs next to them. Four weeks of downtime while waiting for
replacement motherboards, video controllers and hard drives. Since
then, my kind persuasion has been much more compelling.

have fun,
john

Lydia Coffman wrote:

>
>
> Hello:
>
> In my recent absence, a welding station was set up just outside the
> closet where one of my HP switches lives. Whenever someone is welding,
> it causes the switch to "fault" and everyone connected to the network
> through that switch loses their connection (apprx 8-10 workstations).
> Then I have to kill their Vantage sessions, they all have to reboot etc...
>
> They are not on the same power panel. I suspect some kind of RF
> interference. Is there any way to shield my switch, or do they have to
> move their welding set-up?
>
> We've tested this and it is most definitely the welder.
>
> Any ideas?
>
> Thanks,
> Lydia
>

system · June 26, 2006, 2:23pm

If it's EM interference there is special shielding that can be installed
in the closet. Not sure of the cost. If it were me, I would just move
the station.

________________________________

From: vantage@yahoogroups.com [mailto:vantage@yahoogroups.com] On Behalf
Of Lydia Coffman
Sent: Monday, June 26, 2006 10:51 AM
To: vantage@yahoogroups.com
Subject: RE: [Vantage]OT-Hardware ?

Hello:

In my recent absence, a welding station was set up just outside the
closet where one of my HP switches lives. Whenever someone is welding,
it causes the switch to "fault" and everyone connected to the network
through that switch loses their connection (apprx 8-10 workstations).
Then I have to kill their Vantage sessions, they all have to reboot
etc...

They are not on the same power panel. I suspect some kind of RF
interference. Is there any way to shield my switch, or do they have to
move their welding set-up?

We've tested this and it is most definitely the welder.

Any ideas?

Thanks,
Lydia

[Non-text portions of this message have been removed]

[Non-text portions of this message have been removed]

system · June 26, 2006, 2:32pm

I'd concur with the wiring issues - perhaps a 220 or greater power line
routed near the network runs that are going into or out of the switch?

If not RF, how about magnetic fields being generated.

Just how close is "just outside"???

I've seen cases where a cheap 6" desk fan will cause jitters in 21"
monitors when the fan is in one cubicle and the monitor is in the next ---
back to back against the same cubicle wall. Given just a few feet of
seperation there was no issue. I've also seen jitters in monitors up
against drywall when there was a over head paging system on the otherside of
the wall.

Todd

_____

From: vantage@yahoogroups.com [mailto:vantage@yahoogroups.com] On Behalf Of
Lydia Coffman
Sent: Monday, June 26, 2006 12:51 PM
To: vantage@yahoogroups.com
Subject: RE: [Vantage]OT-Hardware ?

Hello:

In my recent absence, a welding station was set up just outside the closet
where one of my HP switches lives. Whenever someone is welding, it causes
the switch to "fault" and everyone connected to the network through that
switch loses their connection (apprx 8-10 workstations). Then I have to kill
their Vantage sessions, they all have to reboot etc...

They are not on the same power panel. I suspect some kind of RF
interference. Is there any way to shield my switch, or do they have to move
their welding set-up?

We've tested this and it is most definitely the welder.

Any ideas?

Thanks,
Lydia

[Non-text portions of this message have been removed]

[Non-text portions of this message have been removed]

system · June 26, 2006, 4:06pm

Thanks to all of you...they are moving the welding station --
Lydia

.
<http://geo.yahoo.com/serv?s=97359714&grpId=20369&grpspId=1600007183&msgId=50623&stime=1151346727>

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