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Low cost Utility VOM

 
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dj_theis



Joined: 28 Aug 2017
Posts: 56
Location: Minnesota

PostPosted: Mon Nov 30, 2020 2:54 pm    Post subject: Low cost Utility VOM Reply with quote

I recall (seemed like less than a year ago) Bob had mentioned a digital VOM from Ebay that he thought was particularly (surprisingly) accurate and reliable.

I cannot seem to find the archive of that post but I know at the time I thought, " I should buy one for when I need it." I did not follow my advice.

Well, I'm moving my project to the airport and I need to duplicate some of my tools. I'm not inlclined to buy another Fluke without first looking into one of the capable off brands alternatives.

Any suggestions on purchases that are reliable over the longer term? (I've heard nothing necessarily good about the HF version wrt reliability).

Thanks in advance for any comments.

Dan Theis


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PostPosted: Sun Dec 06, 2020 6:42 pm    Post subject: Low cost Utility VOM Reply with quote

At 04:54 PM 11/30/2020, you wrote:
Quote:
--> AeroElectric-List message posted by: "dj_theis" <djtheis58(at)gmail.com>

I recall (seemed like less than a year ago) Bob had mentioned a digital VOM from Ebay that he thought was particularly (surprisingly) accurate and reliable.

I cannot seem to find the archive of that post but I know at the time I thought, " I should buy one for when I need it." I did not follow my advice.

Well, I'm moving my project to the airport and I need to duplicate some of my tools. I'm not inlclined to buy another Fluke without first looking into one of the capable off brands alternatives.

Any suggestions on purchases that are reliable over the longer term? (I've heard nothing necessarily good about the HF version wrt reliability).

Thanks in advance for any comments.

Dan Theis

You almost cannot go 'wrong' . . . the technology
for rudimentary measurements is an order of magnitude
better than our treasured legacy instruments and at
1/4 the price.


Close your eyes and throw a dart.

https://tinyurl.com/y2n5pfc6

https://tinyurl.com/yyrgmr2p

https://tinyurl.com/yxj3khuv


I would avoid instruments with lots
of 'cool' features like frequency,
capacitance and inductance measurements.
I have those capabilities on my workbench
and even there, those features are seldom
exercised. Similarly, you're not going to
need to measure transistor quality.

I prefer elastomeric push buttons as opposed
to rotary switches. These are relatively
'sealed' against intrusions. But if you go
for a rotary switch, pick on with a minimum
of range selections. More selections only
increased mechanical complexity/environmental
vulnerability.

Clip off the black probe and replace with insulated
alligator clip. Having black 'clip grounded' while probing
the system is much handier.

Check out the Holey Socks approach to protecting
the instrument while rattling around with the tools.

https://tinyurl.com/y5x2zugh

This soft case wads up to fit in your pocket
while the instrument is in use.

The very best part of this experiment is what
do you have to loose? If your selection proves
unworthy of a place of honor in your toolbox,
pitch the thing and try something else. It's
a cheap experiment.

I've purchased dozens of this genre' of
instrument over the years . . . the last one
I pitched was a radio shack device that I
purchased about 1975 for what I think was
about $45.00. Poor thing just gave up
the ghost. Gave it a respectful burial about
15 years ago. I don't think I've spent that
much money again since.

Sorry to have been ignoring you folks for the past
4 or 5 weeks. Dr. Dee and I are climbing out of
our bouts with the BigC. Dr. Dee is back at her
desk and I'm in what promises to be a long,
slow recovery of stamina. Not hurting, appetite
returning. O2 sats pretty good . . . but I'd
loose a sack race with a class of kindergartners. Been
off the EMS crew for couple months. Sure miss
those guys. Things are a bit better every day.



Bob . . .


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bob.verwey(at)gmail.com
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PostPosted: Sun Dec 06, 2020 8:47 pm    Post subject: Low cost Utility VOM Reply with quote

God speed with the recovery our revered mentor!

On Mon, 07 Dec 2020, 04:51 Robert L. Nuckolls, III, <nuckolls.bob(at)aeroelectric.com (nuckolls.bob(at)aeroelectric.com)> wrote:

Quote:
At 04:54 PM 11/30/2020, you wrote:
Quote:
--> AeroElectric-List message posted by: "dj_theis" <djtheis58(at)gmail.com (djtheis58(at)gmail.com)>

I recall (seemed like less than a year ago) Bob had mentioned a digital VOM from Ebay that he thought was particularly (surprisingly) accurate and reliable.

I cannot seem to find the archive of that post but I know at the time I thought, " I should buy one for when I need it."  I did not follow my advice.

Well, I'm moving my project to the airport and I need to duplicate some of my tools.  I'm not inlclined to buy another Fluke without first looking into one of the capable off brands alternatives. 

Any suggestions on purchases that are reliable over the longer term? (I've heard nothing necessarily good about the HF version wrt reliability).

Thanks in advance for any comments.

Dan Theis

  You almost cannot go 'wrong' . . . the technology
  for rudimentary measurements is an order of magnitude
  better than our treasured legacy instruments and at
  1/4 the price.


  Close your eyes and throw a dart.

https://tinyurl.com/y2n5pfc6

https://tinyurl.com/yyrgmr2p

https://tinyurl.com/yxj3khuv


  I would avoid instruments with lots
  of 'cool' features like frequency,
  capacitance and inductance measurements.
  I have those capabilities on my workbench
  and even there, those features are seldom
  exercised. Similarly, you're not going to
  need to measure transistor quality.

  I prefer elastomeric push buttons as opposed
  to rotary switches. These are relatively
  'sealed' against intrusions. But if you go
  for a rotary switch, pick on with a minimum
  of range selections. More selections only
  increased mechanical complexity/environmental
  vulnerability.

  Clip off the black probe and replace with insulated
  alligator clip. Having black 'clip grounded' while probing
  the system is much handier.

  Check out the Holey Socks approach to protecting
  the instrument while rattling around with the tools.

https://tinyurl.com/y5x2zugh

  This soft case wads up to fit in your pocket
  while the instrument is in use.

  The very best part of this experiment is what
  do you have to loose? If your selection proves
  unworthy of a place of honor in your toolbox,
  pitch the thing and try something else. It's
  a cheap experiment.

  I've purchased dozens of this genre' of
  instrument over the years . . . the last one
  I pitched was a radio shack device that I
  purchased about 1975 for what I think was
  about $45.00.  Poor thing just gave up
  the ghost. Gave it a respectful burial about
  15 years ago. I don't think I've spent that
  much money again since.

  Sorry to have been ignoring you folks for the past
  4 or 5 weeks. Dr. Dee and I are climbing out of
  our bouts with the BigC. Dr. Dee is back at her
  desk and I'm in what promises to be a long,
  slow recovery of stamina. Not hurting, appetite
  returning. O2 sats pretty good . . . but I'd
  loose a sack race with a class of kindergartners. Been
  off the EMS crew for couple months. Sure miss
  those guys. Things are a bit better every day.

 

  Bob . . .


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PostPosted: Mon Dec 07, 2020 10:08 am    Post subject: Low cost Utility VOM Reply with quote

Quote:

I would avoid instruments with lots
of 'cool' features like frequency,
capacitance and inductance measurements.
I have those capabilities on my workbench
and even there, those features are seldom
exercised. Similarly, you're not going to
need to measure transistor quality.

It's been awhile since I last sifted
the offerings for utility grade instruments.
I see it's pretty difficult to 'avoid'
some of the extras.

Let's see if I can simplify a recommendation:

https://tinyurl.com/yyc9x2n9

Here's another offering that ships from the
US.

https://tinyurl.com/yy6aswvc

I bought a couple of similar offerings
about a year ago and added them to the
toyboxes in a couple of our
rural fire stations. You can pretty
much ignore these 'whistle' selections
except, of course, for good 'ol Ohms.


[img]cid:.0[/img]

This instrument does include
thermocouple based temperature measurement
which may be handy.

If anyone picks one up and finds it
falls short of expectations . . .
I'll buy it from you.


Bob . . .

Un impeachable logic: George Carlin asked, "If black boxes
survive crashes, why don't they make the whole airplane
out of that stuff?"


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Ceengland



Joined: 11 Oct 2020
Posts: 391
Location: MS

PostPosted: Mon Dec 07, 2020 10:45 am    Post subject: Low cost Utility VOM Reply with quote

On 12/7/2020 12:02 PM, Robert L. Nuckolls, III wrote:

Quote:
Quote:

  I would avoid instruments with lots
  of 'cool' features like frequency,
  capacitance and inductance measurements.
  I have those capabilities on my workbench
  and even there, those features are seldom
  exercised. Similarly, you're not going to
  need to measure transistor quality.

   It's been awhile since I last sifted
   the offerings for utility grade instruments.
   I see it's pretty difficult to 'avoid'
   some of the extras.

   Let's see if I can simplify a recommendation:

https://tinyurl.com/yyc9x2n9
  
   Here's another offering that ships from the
   US.

https://tinyurl.com/yy6aswvc

   I bought a couple of similar offerings
   about a year ago and added them to the
   toyboxes in a couple of our
   rural fire stations.  You can pretty
   much ignore these 'whistle' selections
   except, of course, for good 'ol Ohms.


[img]cid:part3.5983A634.B6A7F2D0(at)gmail.com[/img]

   This instrument does include
   thermocouple based temperature measurement
   which may be handy.

   If anyone picks one up and finds it
   falls short of expectations . . .
   I'll buy it from you.


  Bob . . .
To give you young whippersnappers some perspective, my 1st portable True RMS digital meter was far cheaper than typical lab grade instruments of the day, had an LED display (about 30 minutes on the battery), was VOM-only, and cost $200. In 1975 dollars. So....
Virus-free. www.avast.com [url=#DAB4FAD8-2DD7-40BB-A1B8-4E2AA1F9FDF2] [/url]


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