[AT] Reading ohms on a digital VOM

[Bigdog]

K stands for kilohms or  as in the 2K scale, full scale reading would be 2000 ohms, 20,000 ohms on the next scale, 200,000 - M stands for megohms or ohms times 1 million.  You will want to use the straight ohms scale for the most accurate readings.  On your 20 k scale, the reading really isn't off the scale, you're just trying to read a value of roughly 1 ohm on a scale of 1 to 20,000 range.  To be accurate, you want to use the scale that uses as much of the range as possible.

Bigdog
  ----- Original Message ----- 
  From: charles bridges 
  To: Antique tractor email discussion group 
  Sent: Thursday, October 28, 2004 9:32 PM
  Subject: [AT] Reading ohms on a digital VOM


  I have a digital VOM and don't understand how to read it.  On the ohm scale,
  the switch is marked  as follows.  (Ohm emblem)-(200)-(2k)-(20k)-(200k)-
  (2m)-(20m).  What does the M and K beside the numbers mean?

  In trying to use it to check a coil.  The coil should have 0.81 to 0.99
  primary resistance.  If I set the meter on the ohm emblem it reads  .003.
  If on the 200 scale it reads 01.3.  On the 2k it reads .001. On the  20k it
  reads 0.00.  Does this mean the resistance is off the scale at the 20k
  setting?

  There must be something I am missing here, and I figured some of you guys
  would know.

  Thanks in advance
  Charles
  not so smart in elec.

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