Beware Cheap Chinese voltmeters - Kawasaki Vulcan 750 Forum : Kawasaki VN750 Forums
Electrical
Where does this wire go?
Includes Electrical mods, Lights, Stator,
Rectifier, Diagrams, etc

 1Likes
  • 1 Post By kc2dgq
 
LinkBack Thread Tools Display Modes
post #1 of 6 (permalink) Old 07-24-2017, 10:22 PM Thread Starter
NewB to Vulcans
 
TonyO's Avatar
 
Join Date: May 2016
Location: Orlando, FL
Posts: 205
iTrader: (0)
 
Beware Cheap Chinese voltmeters

As part of making an over discharge protection circuit I decided to check the calibration of the el cheapo flea bay voltmeter I installed. Damm thing can be as much as 0.8 Volts off!!!!
Attached Thumbnails
Click image for larger version

Name:	2017-07-24 19.05.10.jpg
Views:	52
Size:	89.6 KB
ID:	39705   Click image for larger version

Name:	2017-07-24 20.44.01.jpg
Views:	58
Size:	90.8 KB
ID:	39713  

'99 Vulcan "Victoria"
TonyO is offline  
Sponsored Links
Advertisement
 
post #2 of 6 (permalink) Old 07-25-2017, 07:07 PM
Senior Member
 
kc2dgq's Avatar
 
Join Date: May 2010
Location: New Jersey
Posts: 3,350
iTrader: (13)
 
Garage
I think that most of those digital voltage displays are not as accurate as one would like them to be.

The number displayed is not a critical as you think.......let me explain.
Knowing what your charging system is doing is more important than the actual numbers. at idle, you would not expect much charging taking place, but at the higher RPM, you want to see a higher voltage(system is charging).
Sitting at a stoplight with brake lights on and possibly the radiator fan running...you expect to see a lower voltage...this is normal.

I installed a simple LED on my dash that tells me what the system is doing...not the actual voltage....that keeps it simple, green is acceptable voltage, flashing green is charging, and red means battery voltage is low.

HERE is the link to my thread for my LED indicator install.
One1 likes this.
kc2dgq is offline  
post #3 of 6 (permalink) Old 07-25-2017, 07:50 PM
Old Fart
 
Knifemaker's Avatar
 
Join Date: Jun 2004
Location: Catawissa, MO
Posts: 11,674
iTrader: (4)
     
Garage
Yes. Good voltmeters will usually say how accurate they are. (+/- 0.1 volts e.g.) Good ones also usually have an adjustment to alter them if they are wrong.

But yes, numbers are relative, if you check one against another that you trust, you will then know what to add or subtract when looking at the one that's wrong.

If You Are Not Sure If I Am Joking or Not....I AM !!Photos:
http://www.flickr.com/photos/knifemaker1954/sets/
Knifemaker is offline  
 
post #4 of 6 (permalink) Old 07-25-2017, 10:06 PM
Senior Member
 
Spockster's Avatar
 
Join Date: Nov 2012
Location: WV
Posts: 6,669
iTrader: (5)
   
When I looked at those, they had +/-1v in the specs, some weren't waterproof. Still better than not having one.

There's really a wide selection of meters now, just looking on Ebay.

2003-21k mi
Shaved w/UniPK92+Stock Jets-TPE/MOSFET-Shinko Tires-AGM batt-bags-chrome-LEDs...more
__________________________________________________ ____________
Repair Manual: http://www.mediafire.com/file/mj7z81..._Catalogue.pdf

Owner's Manual: http://www.mediafire.com/file/nscb5f...ers+Manual.pdf
Spockster is offline  
post #5 of 6 (permalink) Old 07-31-2017, 06:24 PM
Senior Member
 
HardRock's Avatar
 
Join Date: Nov 2012
Location: Saranac, MI , USA
Posts: 196
iTrader: (0)
 
Quote:
Originally Posted by Spockster View Post
When I looked at those, they had +/-1v in the specs, some weren't waterproof. Still better than not having one.

There's really a wide selection of meters now, just looking on Ebay.
X2

I replaced my gas gauge with a voltmeter, now that part of my dash gives me info I can use rather then telling me that I still have a full tank with 75 miles on the trip meter.
Attached Thumbnails
Click image for larger version

Name:	Voltmeter.jpg
Views:	39
Size:	99.0 KB
ID:	39945  
HardRock is offline  
post #6 of 6 (permalink) Old 07-31-2017, 07:47 PM
Senior Member
 
Spockster's Avatar
 
Join Date: Nov 2012
Location: WV
Posts: 6,669
iTrader: (5)
   
Quote:
Originally Posted by HardRock View Post
X2

I replaced my gas gauge with a voltmeter, now that part of my dash gives me info I can use rather then telling me that I still have a full tank with 75 miles on the trip meter.
Look at the miles on that puppy!

Meter looks factory that way.

2003-21k mi
Shaved w/UniPK92+Stock Jets-TPE/MOSFET-Shinko Tires-AGM batt-bags-chrome-LEDs...more
__________________________________________________ ____________
Repair Manual: http://www.mediafire.com/file/mj7z81..._Catalogue.pdf

Owner's Manual: http://www.mediafire.com/file/nscb5f...ers+Manual.pdf
Spockster is offline  
Sponsored Links
Advertisement
 
Reply

Bookmarks

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the Kawasaki Vulcan 750 Forum : Kawasaki VN750 Forums forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

Once registered, your User Name"cannot be changed". We can make exceptions within 7 days, but after that, it is set in stone.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:
OR

Log-in










Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode



Posting Rules  
You may post new threads
You may 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 On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome