|
|
|
|
|
#46
06-30-2003, 09:41 PM
|
|||
|
|||
|
Forgot about the "shatter" factor...
Actually, I think I will just throw mine away cuz , after blowing so many over the years , I now have learned not to attempt to find the Resistance/continuity of a live 220 AC circuit.... 
|
|
#47
07-01-2003, 09:01 AM
|
|||
|
|||
|
Quote:
|
|
#48
07-01-2003, 09:04 AM
|
|||
|
|||
|
Quote:
|
|
#49
07-01-2003, 02:49 PM
|
||||
|
||||
|
My curiosity is still killing me about the function of the thing I posted earlier...
 The arrow on the left points to a spring attached to the circuit board. When the case is closed makes contact with the small rectangle on the right, which is aluminum in appearance and presumably conductive. The bigger square on the right is a clear piece of plastic on top of a white double-sided adhesive sheet. Anybody?
__________________
1992 300E Sedan (Sold) 1999 E320 Wagon (Sold) 1995 E320 Sedan 1995 E320 Wagon
|
|
#50
07-01-2003, 04:56 PM
|
|||
|
|||
|
I think that is a Noise [ Hash] shield, like a shielded cable for engine noise RF...
I have the same on the inside cover of a Sun LS2000 scope...
|
|
#51
07-01-2003, 05:51 PM
|
||||
|
||||
|
That was my first thought too, but the bulk of it seems to be plastic, not metallic... I would have expected a big swath of foil-like substance instead. Is your shield metallic?
__________________
1992 300E Sedan (Sold) 1999 E320 Wagon (Sold) 1995 E320 Sedan 1995 E320 Wagon
|
|
#52
07-01-2003, 06:15 PM
|
|||
|
|||
|
It is metal with a plastic covering.
You will notice the covering is not where the spring must make contact in order to ground the shielding to the circuit board ground through the spring when put back together.....
|
|
#53
07-01-2003, 08:45 PM
|
|||
|
|||
|
Little more info on the shield from a R&D friend..
These shields are installed on any meters that will read freq. They are there to block the atmospheric frequencies of the entire Freq Band the meter is capable of reading ...and , as noted , the spring grounds them out at the chassis/board neg side... Hash/Noise block.....
|
|
#54
07-01-2003, 11:41 PM
|
||||
|
||||
|
Ok, but, I think, mine is not metallic. So out comes the screwdriver to open mine again and here's the deal...
The white part in the photo that I thought was double-sided adhesive is actually the back of an adhesive sheet of that metallic aluminum(?) stuff. The little rectangle of aluminum facing the interior is part of that same sheet folded over, providing continuity to the whole sheet. And the little spring makes contact with that little rectangle. The clear plastic is apparently just to cover the adhesive so stuff doesn't stick to it. Now, why in the world they wouldn't just stick a big square of the stuff on with the aluminum facing the interior, and do away with the whole folding-over and covering w/plastic thing, I don't know. So the mystery continues.  But, the general purpose of it as a frequency shield makes sense. And hopefully it isn't too critical if there are a couple little tears in it as mine now has, hehe.
__________________
1992 300E Sedan (Sold) 1999 E320 Wagon (Sold) 1995 E320 Sedan 1995 E320 Wagon
|
|
#55
07-02-2003, 12:15 AM
|
|||
|
|||
|
Likely that it comes in rolls from manufacturer and the alum is glue dipped .. so, when they take it off the roll , it isn't stuck to its self... they just peel off a side and apply to the inside case...
|
|
#56
07-02-2003, 04:18 PM
|
||||
|
||||
|
Hmm...
 Nope, because then the little rectangular part facing inside would have adhesive on it, and it doesn't. Mystery continues...
__________________
1992 300E Sedan (Sold) 1999 E320 Wagon (Sold) 1995 E320 Sedan 1995 E320 Wagon
|
 |
| Bookmarks |
|
|
Linear Mode
