Cruisers Forum
 


Join CruisersForum Today

Reply
 
Thread Tools Rate Thread Display Modes
Old 08-09-2013, 21:02   #91
Senior Cruiser
 
Therapy's Avatar

Cruisers Forum Supporter

Join Date: Jul 2007
Location: W Florida
Boat: The Jon boat still, plus a 2007 SeaCat.
Posts: 6,894
Images: 4
Re: Multimeters - What Features To Look For.

Quote:
Originally Posted by socaldmax View Post
Yup, the vendor selling the "MS2108" for $39.95 left the "A" off the end. Maybe accidental, but I'm guessing it wasn't.

I did buy an MS2108 on Ebay for $61. It will take another week for it to arrive.
I think you are correct.

I went ahead and ordered the one from Amazon.

85.00

Oh well. I am sure I will be happy in the end.

Thanks everybody.
__________________

__________________
Who knows what is next.
Therapy is offline   Reply With Quote
Old 08-09-2013, 21:37   #92
Registered User

Join Date: Jul 2013
Location: Usually South Florida these days
Posts: 825
Re: Multimeters - What Features To Look For.

I've owned a lot of meters over the years. Some were NBS traceable. Some were cheap ones. Most were somewhere in-between.

For the most part, the cheap ones are plenty good for average daily use. There are a few things that you need to watch for when buying a meter to use with 12vdc systems.

One thing to watch is the resolution. The last $8 meter that I bought from Harbor Freight only reads down to 1 digit below the decimal point & that last digit is not trustworthy. I can not use that meter to accurately check the voltage on a 12v battery bank.

Another thing to watch is max voltage. Some of the smaller meters that I have seen recently do not go up very high on the ac voltage scale.

If you are buying a clamp-on ammeter, you need to check if it is ac only or ac/dc. The cheap ones are usually ac only.
__________________

__________________
pbiJim is offline   Reply With Quote
Old 08-09-2013, 21:50   #93
Registered User

Join Date: Jul 2013
Location: Usually South Florida these days
Posts: 825
Re: Multimeters - What Features To Look For.

Quote:
Originally Posted by SURV69 View Post
BTW... if anyone knows how to actually calibrate these things accurately, I'd like to know....
To do it officially & be NBS traceable, you need a device called a calibration standard to test the accuracy of the meter. They are not cheap & are not commonly available at retail outlets.

Once you determine that the meter needs to be adjusted, you then hope that it's adjustable. Most are, but some are not. Adjusting them is often as simple as turning a screw inside the unit. The adjustment method varies with the individual instrument.
__________________
pbiJim is offline   Reply With Quote
Old 08-09-2013, 21:58   #94
Registered User

Join Date: Jul 2013
Location: Usually South Florida these days
Posts: 825
Re: Multimeters - What Features To Look For.

Quote:
Originally Posted by cadmus View Post
I assume, like everything these days, they are all make by the same small children in the same asian sweatshop.
The last time that I spoke with a district rep, Simpson meters were still being assembled by native Americans. That was more than 10 years ago.
__________________
pbiJim is offline   Reply With Quote
Old 08-09-2013, 22:01   #95
Registered User

Join Date: Jul 2013
Location: Usually South Florida these days
Posts: 825
Re: Multimeters - What Features To Look For.

Quote:
Originally Posted by foggysail View Post
You can trust that he is not putting 800 amperes through any hand held meter!
I just took a look at one of my clap-on meters. It has a 1000 amp range. I bought it off the shelf at Fry's Electronics. It's nothing special.
__________________
pbiJim is offline   Reply With Quote
Old 08-09-2013, 22:06   #96
Registered User

Join Date: Jul 2013
Location: Usually South Florida these days
Posts: 825
Re: Multimeters - What Features To Look For.

Quote:
Originally Posted by goboatingnow View Post
Nobody measures current , in a test environment with shunts !!!
I've made many thousands of NBS-traceable precision measurements in laboratory environments using temperature compensated shunts. They work. Some people do still use them.
__________________
pbiJim is offline   Reply With Quote
Old 09-09-2013, 04:09   #97
Nearly an old salt
 
goboatingnow's Avatar

Cruisers Forum Supporter

Join Date: Jun 2009
Posts: 13,649
Images: 3
Re: Multimeters - What Features To Look For.

Quote:
I've made many thousands of NBS-traceable precision measurements in laboratory environments using temperature compensated shunts. They work. Some people do still use them
Yes yes of course, when I meant 'test' I meant a field 'test' environment. hall effect clamps are almost universally used as breaking into the circuit is sometimes a big pain.

Dave
__________________
Check out my new blog on smart boat technology, networking and gadgets for the connected sailor! - http://smartboats.tumblr.com
goboatingnow is offline   Reply With Quote
Old 11-09-2013, 19:57   #98
Senior Cruiser
 
Therapy's Avatar

Cruisers Forum Supporter

Join Date: Jul 2007
Location: W Florida
Boat: The Jon boat still, plus a 2007 SeaCat.
Posts: 6,894
Images: 4
Re: Multimeters - What Features To Look For.

Well hell!

I got the MS2108 today and the leads are loose in the meter sockets. They don't push in. They just "fall" in and wobble around. Spreading the posts a little did nothing.

Oh well. Will return and hope for a good better one.

__________________
Who knows what is next.
Therapy is offline   Reply With Quote
Old 11-09-2013, 20:13   #99
Registered User
 
Tymadman's Avatar

Join Date: Jun 2013
Location: Brisbane, Australia
Boat: Farr 6000
Posts: 113
The difference in price also relates to the (safety) category rating, not just accuracy. A cat III rated multimeter will (generally) cost more than a cat II rated one.
A DIY handyman would only need a cat II rated multimeter (for testing mains voltage) or cat I (for testing non-mains stuff) whereas some industrial sites require electricians / technicians to use cat III minimum.
__________________
Cheers,

Neil
http://www.madmanmarine.com
Tymadman is offline   Reply With Quote
Old 12-09-2013, 08:37   #100
Do… or do not
 
s/v Jedi's Avatar

Cruisers Forum Supporter

Join Date: Feb 2009
Location: in paradise
Boat: Sundeer 64
Posts: 9,198
Cheap, cheap, cheap often equals junk. My Fluke is an antique and I have saved a ton by buying it so long ago that I can't remember and not ever having to buy one again. Sometimes, spending a little more for quality gear pays off
__________________
s/v Jedi is offline   Reply With Quote
Old 12-09-2013, 10:29   #101
Senior Cruiser
 
Cheechako's Avatar

Cruisers Forum Supporter

Join Date: Aug 2006
Location: Skagit City, WA
Posts: 19,365
Re: Multimeters - What Features To Look For.

Quote:
Originally Posted by Therapy View Post
Well hell!

I got the MS2108 today and the leads are loose in the meter sockets. They don't push in. They just "fall" in and wobble around. Spreading the posts a little did nothing.

Oh well. Will return and hope for a good better one.

Well.... I tried to say it earlier....based on working on electronics stuff as a hobby... you get what you pay for. R U gonna use this tool for a long time? FLuke! or other good brand. How many $20 units are you willing to buy before you get a good one.... seems like it always comes down to that with cheap stuff... lord knows I've tried it my share of times!
__________________
"I spent most of my money on Booze, Broads and Boats. The rest I wasted" - Elmore Leonard











Cheechako is offline   Reply With Quote
Old 12-09-2013, 11:03   #102
Registered User

Join Date: May 2011
Location: Toronto
Boat: Sandpiper 565
Posts: 2,943
Re: Multimeters - What Features To Look For.

Quote:
Originally Posted by Cheechako View Post
How many $20 units are you willing to buy before you get a good one....
One of my favourite $60 off-brand multimeters regularly comes up on sale for around $20 [oh heck, regular price is now $50]

It's my experience that the $40 to $100 price-point seems to give you a reasonably built meter that will last. I have one Radio-Shack meter that is a near-clone of the Fluke 77 (rubber boot, full auto-ranging, analog bar-graph, beep continuity). It cost $99, came on sale for around $70. It's going on 20 years old but still works well.
__________________
Lake-Effect is offline   Reply With Quote
Old 12-09-2013, 15:42   #103
Registered User

Join Date: Jul 2013
Location: San Diego, CA
Posts: 3,157
Re: Multimeters - What Features To Look For.

Quote:
Originally Posted by Therapy View Post
Well hell!

I got the MS2108 today and the leads are loose in the meter sockets. They don't push in. They just "fall" in and wobble around. Spreading the posts a little did nothing.

Oh well. Will return and hope for a good better one.

Don't mail it back yet!!

I just received mine in the mail. Are you positive the leads don't fit? It might be that you didn't push them in far enough. Mine go in 1/2" before making contact, they go in another 1/4" whereupon they make positive contact and the leads are flush against the surface of the meter. It takes firm pressure to make them seat.
__________________
socaldmax is offline   Reply With Quote
Old 12-09-2013, 18:06   #104
Do… or do not
 
s/v Jedi's Avatar

Cruisers Forum Supporter

Join Date: Feb 2009
Location: in paradise
Boat: Sundeer 64
Posts: 9,198
Re: Multimeters - What Features To Look For.

Quote:
Originally Posted by socaldmax View Post
Don't mail it back yet!!

I just received mine in the mail. Are you positive the leads don't fit? It might be that you didn't push them in far enough. Mine go in 1/2" before making contact, they go in another 1/4" whereupon they make positive contact and the leads are flush against the surface of the meter. It takes firm pressure to make them seat.
you can always whack it with a mallet a bit to make it fit
(yep, making fun )
__________________
s/v Jedi is offline   Reply With Quote
Old 13-09-2013, 15:59   #105
Senior Cruiser
 
Therapy's Avatar

Cruisers Forum Supporter

Join Date: Jul 2007
Location: W Florida
Boat: The Jon boat still, plus a 2007 SeaCat.
Posts: 6,894
Images: 4
Re: Multimeters - What Features To Look For.

Quote:
Originally Posted by socaldmax View Post
Don't mail it back yet!!

I just received mine in the mail. Are you positive the leads don't fit? It might be that you didn't push them in far enough. Mine go in 1/2" before making contact, they go in another 1/4" whereupon they make positive contact and the leads are flush against the surface of the meter. It takes firm pressure to make them seat.
OOPS.

I did not push them in that hard. Another set of leads I have fit in only OK. Not tight but OK.
__________________

__________________
Who knows what is next.
Therapy is offline   Reply With Quote
Reply

Tags
paracelle

Thread Tools
Display Modes Rate This Thread
Rate This Thread:

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off




Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -7. The time now is 04:46.


Google+
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, vBulletin Solutions, Inc.
Social Knowledge Networks
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, vBulletin Solutions, Inc.

ShowCase vBulletin Plugins by Drive Thru Online, Inc.