Caption This 2/22/2019

Well, the styrofoam cups probably violate ESD compliance...

Ooops. (ignore this post) How do I delete this?

The single box of an extra large Trojan prophylactic in the convenient little blue carton covers both insulation from ESD and any engineers' wit all-in-one package on the desk. That's as close to interest 'n humor I can muster in the today's test.

Pleasexcusethesnarkonwry

Young Dr. F.: Egor! How could you possibly have traded away ALL my lab equipment for this, just because a door-to-door salesman said it was all that was really needed?!!!

Now, I''ll have to start allllll over again....

Typical summer Humidity reading for July in Houston.

The great thing about it is you can plug a microphone in the back there, and it doubles as a karaoke machine...Now you can sing along with your favorite songs and make the work day pass quickly....

Just another Ole'sillyscope.

Not a very serious piece of equipment these days.

Had me scratching my head . . . .

Add me too the list?

Thanks for finding that! Good Job. I still see nothing amusing, ironic, or dangerous about the original photo, unless it is related to the fact that the original shows low-voltage black and red clips and black and red wires connected by a red dual banana plug inserted upside down into two red banana sockets, that may potentially carry dangerously high voltage.

Crossed Signals

Looks like the dual banana plug is "inserted" vertically but the posts on the megger are arranged horizontally. Thus, the banana plug is not inserted at all but just placed so that it stays put by virtue of the jamming of the shield over the joined plugs against the two instrument lug shields. Any item measured at the business end of the test leads will have its resistance in series with the very high resistance of all that plastic.

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thewildotter

Well, maybe not. This banana plug may have rear facing lugs to allow ganging another set of connections into the rear of the previous. Perhaps the OP thought the same thing I did. I am still not sure what the picture shows.

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thewildotter

Seems that the test leads with their cable ties would leak enough for a non-infinite reading on this scale if the banana plug were inserted horizontally rather than vertically. Anyone have a megger and some likely test leads to run an empirical test ? Use the settings from the small picture rather than the larger one Rixter supplied. Maybe it will still "whir when it stands still."

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thewildotter

The banana plug is inserted correctly. It's horizontal. There is a silver shorting bar on the ground lug that is at an angle.

But, yes, it is 300V insulation on the test leads used for a 1000V IR test. The instrument's output is off so the needle rests at the infinite end of the scale.

They couldn't figure out why the insulation resistance of every cable would read less than the previous one!

"The instrument's output is off so the needle rests at the infinite end of the scale."

"The readings are off the charts! How annoying, now I need to make new charts."

-Egon Spengler, The Real Ghostbusters (old cartoon from the mid-late 80's)

"Well, maybe not. This banana plug may have rear facing lugs". Correct.

Here's a portion of the original photo:

And here's a photo of that kind of Dual Banana Plug:

I've shown the plug in the same position as in the OP photo. You can't read the "GND" on the lug on the right side of this plug. Most, if not all, of the instruments I remember that used polarized dual banana plugs had different colors for the two sockets, with the ground side always on the left. In that position, the cable comes out below the plugs, making it easier to insert an additional plug.

OOPS! I posted my last reply before I saw yours.My bad.You get a GA from me.

It looks to me like a MEGGER perhaps by General Radio..... then full scale deflection for an open circuit connection would make sense.

Yup, me too. Glad I'm in such good company.

The Marvelous Toy

https://www.youtube.com/watch?v=XLYefZkOMB0&t=32s

Oh, that takes me back! I loved Peter, Paul and Mary.

"Ohhh, Please connect me."

So what have most of us missed here?

Have you tried turning it off and on again?

Have you contacted the manufacturer? Information provided by tired and anonymous posters on this forum maybe of questionable value!

Sorry, we don't do homework.

It's analogue, you need to talk to someone over 60 for this one and the manuals will be in hard copy.

It's a calibrator for an Orgasmatron.

I'm guessing it's a megohmmeter, so don't see anything funny in the picture. Please enlighten us.

Maybe it's used to test the resistance of sour grapes.

300V insulation on the test leads used for a 1000V IR test. The instrument's output is off so the needle rests at the infinite end of the scale.

They couldn't figure out why the insulation resistance of every cable would read less than the previous one!

A close-up picture would help.Image has poor resolution.

See Rixter's post #16.

For those who haven't spotted the very good pun, high values of resistance are often measured in "reciprocal ohms" or Seamans.

What reference to Seamans[sic] ?

This megger reads in ohms from meter times range. Who here knows about the Heaviside Condition for distortionless (not lossless) transmission lines ? I think the G in G/C=R/L is shunt conductance in siemans. Meeting the Heaviside Condition may be disruptive technology for minimizing chip clock distribution power dissipation and maintaining sharp edges for chip clocking. Analog telephone lines used added lumped inductors to approach the Heaviside Condition and minimize dispersion over long distances. Adding adaptive leakage may be the way to do it for maintaining sharp edges on chip nets. Counter-intuitive(leakage used to reduce power consumption) but very promising. I am publishing it here to inhibit parrot patenting which might slow down adoption of the technology which has some potential for a partial revival of Moore's Law in processors. There might be prior art since Heaviside and Pupin(the guy who did lump inductors to approximate HC for Telephony). Cellphone innovators could use it, too. I have been proposing it for decades so I may be late suppressing parrot patenting. Just to keep the spelling integrity:

From wikipedia:

...one siemens is redundantly equal to the reciprocal of one ohm...

Unit of: Electric conductance

Named after: Ernst Werner von Siemens

Unit system: SI derived unit

Symbol: S (= Ω⁻¹)

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thewildotter

Siemens?

I missed the pun, please explain...

Conductance measures enablement of current flow in siemens (not seamens per my original post). A condom controls the flow of semen.

The pun is in the conflation of siemens and semen.

A pictorial pun is a particular treat.

Scientology can be done at home.

Looking closer I see this was made in China and designed by Tom Cruise. It is the Plug n Play model.Cool

It explains why 'Goose' jumped out so quick.

ooooohhhhmmmmmmm

I'll talk!!! Just turn that thing off!