Fluke 87 - Page 2 - SailNet Community

   Search Sailnet:

 forums  store  


Quick Menu
Forums           
Articles          
Galleries        
Boat Reviews  
Classifieds     
Search SailNet 
Boat Search (new)

Shop the
SailNet Store
Anchor Locker
Boatbuilding & Repair
Charts
Clothing
Electrical
Electronics
Engine
Hatches and Portlights
Interior And Galley
Maintenance
Marine Electronics
Navigation
Other Items
Plumbing and Pumps
Rigging
Safety
Sailing Hardware
Trailer & Watersports
Clearance Items

Advertise Here






Go Back   SailNet Community > On Board > Gear & Maintenance
 Not a Member? 


Like Tree3Likes
Reply
 
LinkBack Thread Tools
  #11  
Old 03-18-2013
SchockT's Avatar
Senior Member
 
Join Date: May 2012
Location: North Vancouver, BC
Posts: 1,382
Thanks: 0
Thanked 22 Times in 21 Posts
Rep Power: 3
SchockT is on a distinguished road
Re: Fluke 87

Quote:
Originally Posted by asdf38 View Post
I design electronics, use flukes all the time, but like others have never used more than volts, amps, ohms, C, and an occasional diode check. That said their accuracy and durability is great. I'll get one myself eventually but right now I get by on a $10 online one.

Do not spend money calibrating it. For regular use you'll never need that much accuracy.

I'm not sure about schockt's comment about a high resistance short though. A short is a subjective thing, it's a somewhat arbitrary threshold on a resistance measurement below which the meter will beep and above which it won't (usually around 100 ohms). The fluke will do a better job making that resistance measurement, but I don't see anything special about a meter that just happens to have a high threshold for the beep. And even a cheap meter can make an ok R measurement over a pretty wide range. Perhaps the fluke lets you change the threshold.
A short isn't a subjective thing when you are trying to troubleshoot a line voltage control circuit that is blowing control fuses, and the cheap meter says that a portion of the circuit is O/L, and the good meter says it is shorted to ground. In that case having a crappy meter means spending a lot more time searching for a problem that it can't see.
Brewgyver likes this.
__________________
1979 Santana 30 Tall Rig
Hull#101
Reply With Quote Share with Facebook
  #12  
Old 03-18-2013
davidpm's Avatar
Senior Member
 
Join Date: Oct 2007
Location: Madison
Posts: 3,644
Thanks: 160
Thanked 36 Times in 29 Posts
Rep Power: 7
davidpm is on a distinguished road
Re: Fluke 87

Quote:
Originally Posted by SchockT View Post
A short isn't a subjective thing when you are trying to troubleshoot a line voltage control circuit that is blowing control fuses, and the cheap meter says that a portion of the circuit is O/L, and the good meter says it is shorted to ground. In that case having a crappy meter means spending a lot more time searching for a problem that it can't see.
Does that kind of circuit exist on a sailboat?
__________________
The lesson from the Icarus story is not about human failing.
It is a lesson about the limitations of wax as an adhesive.
If you have an engineering problem solve it.
Reply With Quote Share with Facebook
  #13  
Old 03-18-2013
SchockT's Avatar
Senior Member
 
Join Date: May 2012
Location: North Vancouver, BC
Posts: 1,382
Thanks: 0
Thanked 22 Times in 21 Posts
Rep Power: 3
SchockT is on a distinguished road
Re: Fluke 87

Quote:
Originally Posted by davidpm View Post
Does that kind of circuit exist on a sailboat?
Probably not. It was just an example of why I prefer to use professional grade meters.

As I said, the Fluke is overkill for your purposes but it is quality.

I keep a Fluke 83 on my boat, but then again I sometimes end up doing work on dock power at some of our outstations, which includes 600v transformers.
__________________
1979 Santana 30 Tall Rig
Hull#101

Last edited by SchockT; 03-18-2013 at 11:47 PM.
Reply With Quote Share with Facebook
  #14  
Old 03-20-2013
asdf38's Avatar
Senior Member
 
Join Date: Jul 2010
Posts: 671
Thanks: 1
Thanked 4 Times in 4 Posts
Rep Power: 5
asdf38 is on a distinguished road
Re: Fluke 87

Quote:
Originally Posted by SchockT View Post
A short isn't a subjective thing when you are trying to troubleshoot a line voltage control circuit that is blowing control fuses, and the cheap meter says that a portion of the circuit is O/L, and the good meter says it is shorted to ground. In that case having a crappy meter means spending a lot more time searching for a problem that it can't see.
In that case, a short (in the blow something up sense) is anything greater than the fuse. Which in the case of a 120V system and a 1A control fuse might be 120 ohms or more. However compare that to boat circuit where a 120 ohm load is only 0.1A. That's not a short by anyone's definition in almost any circumstance.

However, in this respect, measuring low resistance, the better meter is going to help you. For example a 12A load in a 12V boat circuit would be just 1 ohm and plenty of boats have plenty of loads that strong. That means that even 1 ohm on a boat can easily be a normal load and not a fuse blowing "short". Distinguishing between low ohm loads is probably more important on a boat, with its 12V high current circuits than 120V systems with comparatively low current high resistance loads. And the fluke meter is going to help you do that.

Although even the fluke will struggle below 1 ohm because test leads, and the resistance of a touch connection between them and another metal surface add on the order of 0.1 to a few ohms. And all that said, loads don't usually present themselves as just a simple resistance.

But anyways, still saying the fluke is great.
__________________
1979 Contessa 26
Boston, Ma
Reply With Quote Share with Facebook
  #15  
Old 03-20-2013
tommays's Avatar
Senior Member
 
Join Date: Sep 2008
Posts: 4,227
Thanks: 1
Thanked 24 Times in 24 Posts
Rep Power: 6
tommays will become famous soon enough
Re: Fluke 87

On land pretty much any meter can

1. Test the ohms of a motor windings legs to see if they are the same or a coil winding

2. Measure voltage drop

3. If your blowing breakers i generaly dont find big issues with tracking it down

To be honest finding problems with stuff like the position sensors for tilt on and outboard or sterndrive or a fuel sender is simple with and analog meter as

A wacky problem at 1/2 becomes simple to see on the dial
__________________
1970 Cal 29 Sea Fever

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.

1981 J24 Tangent 2930
Tommays
Northport NY


If a dirty bottom slows you down what do you think it does to your boat
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
Reply With Quote Share with Facebook
Reply


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools

 
Posting Rules
You may post new threads
You may post replies
You may post attachments
You may edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On


Similar Threads
Thread Thread Starter Forum Replies Last Post
Anchors; Plow v. Claw v. Delta v. Fluke Talisman66 Gear & Maintenance 102 08-26-2009 04:22 PM


All times are GMT -4. The time now is 04:15 AM.

Add to My Yahoo!         
Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2014, vBulletin Solutions, Inc.
SEO by vBSEO 3.6.1
(c) Marine.com LLC 2000-2012