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Sharky

Shark Tank

Shark Tank: Well, that's a relief

This distribution plant is running out of office space, so the boss decides to empty a storage room and convert it to an office, reports an IT pilot fish working there.

"New CAT-5 wiring, phone wiring, UPS power -- everything installed new," fish says.

"Operations manager moves into the new office and is quick to notice both of his 22-in. CRT monitors flickering and jumping, so he calls me in."

There must be interference from somewhere, fish thinks. Is it the fluorescent lights? Fish flips the switch -- no change.

But a quick walk around to the other side of the wall reveals the problem: The monitors are inches away from a set of 1950s-style power-distribution panels. Wall to wall. Ceiling to floor. Big, fused disconnect switches.

"After hours that night, we disconnect utility power at the main," says fish. "Only power in the building is UPS power. As I suspected, his monitors are just fine with no power in those switches."

Fish proposes a plan of action to the boss: spend $1,500 to have an engineering firm measure the induced voltage through the wall and make recommendations.

No way, says boss, too expensive and won't fix the problem.

OK, fish says, how about $1,500 to have a 1-inch-thick lead shield put up on the wall -- nicely painted, of course.

No way, too expensive.

What about $850 to put new flat-panel LCD displays on the operations manager's desk?

Approved.

"So as I am putting in these new LCD panels, the operations manager asks about the voltage," fish says.

"I tell him, 'The LCD panels are not affected by the voltage. It's gonna kill you -- but the monitors will be fine.'"

Sharky loves a comforting word. But I love true tales of IT life even more. Send me yours at sharky@computerworld.com, and I'll send you a comfortable Shark shirt if I use it. You can also add comments by using the form at the bottom of this page.

See more Shark Tank stories at the Sharkives.

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What People Are Saying

Shark Tank: Well, that's a relief

No one mentioned the most obvious answer.

The submitter stated that the images jumped around which doesn't say magnetism or "gaussy" to me.

Yes I have had EXACTLY this issue, I have heard of the copper shielding, etc...

Reset the viedo card to refresh at 60hz, instead of the more common default of 72 or 75hz

Man....

This is a load of garbage

This is a load of garbage and the story does little credit to Shark Tank, which is usually very informative and valuable.

1) High current conductors produce magnetic fields, which pass through walls, "voltage" does not. All the "solutions" proposed (except the LCDs) were doomed to fail and a complete waste of money. This pilot fish is so far off base his theories aren't even wrong. He should stick to computers and STFU about electromagnetic fields (EMF).

2) The evidence linking EMF to cancer was FABRICATED. A 5th-rate failed scientist at a government lab made it up to keep the grant money flowing in. See EMF Researcher Made Up Data

3) Yanking the building's power was nice test of the UPS but nasty to everyone in the building who didn't have UPS power. This test was not required to understand or fix this problem.

I side with the boss on this one. Pilot fish is an idiot.

It would have to be pretty

It would have to be pretty thick copper to shield it. A sheet of electrical conductor will stop the electric field, but the magnetic field will still pass through it, unless it's substantially thick.

That is why the CRTs were wiggling, the magnetic field was going right through the RFI coating on the cabinet plastic.

Try it yourself with a piece of copper, a magnet, and a compass. The magnetic field goes right through. Then use a sheet of iron. Big difference.

HEY O-O. JIM LATE TODAY HAD

HEY O-O. JIM LATE TODAY HAD TO WROK INSTEAD OF READIG SHARK TANK. SEE YOU TOMOROW!

Naked and snogging while

Naked and snogging while singing Pat Boone? What sort of company are you running?

WE HAVE A SUPERVISRO ORFFICE

WE HAVE A SUPERVISRO ORFFICE HERE THAT HAS TWO BIG CONDIUTS FULL OF BIG WRIRES AND THEY USED TO MAKE GALSS MOTINORS JUMP AROUND SO THEY PUT FALT PANELS IN AND THGEY STOPED.

WE CANT KEEP ANYBO0DY WROKING IN THAT OFFOICE FOR LONGER THAN SIX MONTHS THEY ALWAYS END UIP COMING TO WROK NAKED ONE DAY SINGING PAT BOONE SNOGS

I wonder what would happen

I wonder what would happen if you hung a side of beef in there. If it got cooked you could have a heck of an office party.

we are amused, minimally. In

we are amused, minimally. In our use, even with low average power but high peak, we use discretion on exposure. And lead is for shielding x-rays and ionizing radiation, not power frequencies and switching transients. Copper cage might do it, but I'd find a different wall to work next to and put storage where storage belongs. I think it says bad things about our social outlook when the selected solution masks the emission, but not the exposure.

How about someone calling

How about someone calling OSHA anonymously? Maybe yelling "First!" in a crowded room ... I think its the wrong place for an office unless shielded.

And watch who you call a hag, FluffyJacket. I have needles and thread and I know how to use them.

I've still got a TRaSh 80

I've still got a TRaSh 80 that works as good as it ever did.