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Tool Talk Discussion Board |
Re: analog multimeter
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Posted by tech4 on March 16, 2004 at 07:41:42 from (216.130.152.51):
In Reply to: analog multimeter posted by EIL on March 14, 2004 at 21:37:52:
I think the original question was about a fairly cheap analog meter to supplement his DVM. There are many advantages and disadvantages to both types of meters and it is best to have both on hand. Many times you just need a kind of go - no go type indication such as 12 volts or 0 volts and an analog works just fine as a test light also works ok. The analog meters normally provide a little loading to the circuit 20,000 ohms per volt and is not as likely to read stray voltage from radio transmitters or power line induction as I found with a friend's farm that has a high voltage power line across the farm. The DVM's have a high input impedance 10 megohms or greater that is a great advantage in trouble shooting sensitive electronic equipment. The DVM and I have seen some analog meters with a buzzer for continuity checks is also an advantage but I use a simple door bell buzzer and battery to ring out long wiring harness when I am working alone. My point was not that you do not need a DVM but that you also need an analog meter a little better than the cheap Walmart models and suggested a used Simpson 260 or Triplett 630 or the small 310C. Someone on here said they did not use their 260 anymore so maybe y'all can make a deal. Here is a link below that gives a lot of information on meters.
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