[AT] Reading ohms on a digital VOM

[H. L. Staples]

The "K" Stands for a multiplier of 1,000
The "M"     "         "   "     "            "   1,000,000

Probably When reading on the 200 scale depending on the accuracy of the
meter and the tolerance of the coil you are in the Ball Park.

As you go to higher full scale sensitivity your part becomes a much lower
percentage hence the round off.

When trying to read really small resistances meter lead resistance as well
as the connections will have a greater influence in the total reading.  Try
touching the leads together when a low resistance scale is selected and you
will likely see less than zero ohms, subtract this reading from the total
and you will likely be close to what you want.

Hope this helps.

H. L. 
 
-------Original Message-------
 
From: Antique tractor email discussion group
Date: 10/28/04 21:09:40
To: Antique tractor email discussion group
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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