Re: Puzzle

funfly3 wrote:

Chris Whelan wrote:
funfly3 wrote:

[...]

I always thought antistatic bag did conduct but at a high resistance,
but just tested one with a meter and you seem to be right its non
conducting (at least in the range of my Fluke), seem like you do live
and learn

You would never measure the sort of resistance that an anti-static bag is
with a multi meter. You need a high voltage insulation tester.

I've just tried several different types of bag using an insulation tester
on the 500v range. The results were interesting. The shiny silver type
and the clear pink ones showed infinity even with the crocodile clips
almost touching. I would question whether they had much value in the
prevention of static damage.

The type that are clear but with a printed grid pattern, such as are
commonly used to protect motherboards, showed a resistance of around
0.2MOhms with the clips about 150mm apart. I personally would think twice
about testing a live mobo on one of these.

What a boring life I lead...

Chris
0.2M ohms is within the range of a fluke???

Yep, the resistance of the type of bag that has a grid pattern can easily be
measured with a DMM.

If I get time today I'm going to test some more.

Chris

--
Remove prejudice to reply.
.

Relevant Pages

  • Re: Current measurement
    ... troubleshooting I would say the roll your own shunt and a cheap meter ... A copper shunt looks like a good idea until you look at copper's ... used to make inexpensive RTDs (resistance temperature devices). ... I keep a 100 amp and a 500 amp shunt in my tool box all the time. ...
    (rec.outdoors.rv-travel)
  • Re: Temp readings with thermistor question
    ... at more reasonable temperature outside the heater. ... the resistance of the thermistor at that temperature. ... Biasing the back side of the meter with a second divider allows the ...
    (sci.electronics.design)
  • Re: a strange problem
    ... :>:DMM set to measure resistance of a circuit with a capacitor ... :>:You seem to think that the meter should show you the value ... :>:measuring and how it can affect the reading. ... :>determine why the expected resistance measurement is not being returned. ...
    (sci.electronics.design)
  • Re: a strange problem
    ... :>:DMM set to measure resistance of a circuit with a capacitor ... :>:measuring and how it can affect the reading. ... :> meter can not necessarily be relied upon. ... :> A technician has every right to expect that a digital meter will also ...
    (sci.electronics.design)
  • Re: Radio Shack Ammeter
    ... Check the meter movement full scale current by measuring the meter resistance with a VOM. ... Lets convert them into 0-1.5Amp ammeters, this way the scale markings still work, and that is a reasonable current draw for a single locomotive. ...
    (rec.models.railroad)