Notices
Marine Electronics Forum

Raymarine DS500X speed reading

Old 07-13-2005, 07:58 PM
  #1  
Senior MemberCaptains Club Member
Thread Starter
 
Join Date: Aug 2004
Location: Baha 30 w/ T225 Suzukis
Posts: 684
Likes: 0
Received 1 Like on 1 Post
Default Raymarine DS500X speed reading

The speed reading on my new Ray DS500 sounder is worthless. It reads 1/2 to 2/3 of my GPS speed reading which I assume is correct. Any thoughts??
Old 07-13-2005, 08:00 PM
  #2  
Senior MemberCaptains Club MemberPLEDGER
 
Join Date: Jul 2004
Location:
Posts: 8,744
Received 494 Likes on 327 Posts
Default Re: Raymarine DS500X speed reading

Read the section of th owners manual in regards to calibrating speed input.
Old 07-14-2005, 07:27 PM
  #3  
MDT
Senior MemberCaptains Club MemberPLEDGER
 
Join Date: Feb 2004
Location: Seattle, WA
Posts: 342
Likes: 0
Received 17 Likes on 10 Posts
Default Re: Raymarine DS500X speed reading

Docj,
I have the DS500 and it is relative accurate compared to the GPS. Off by a couple of tenths at the low end (0-5 mph) and off by a couple mph at the high end (>30 mph). There is an adjustment in the set up. Check that the wheel spins freely before you do anything else. Spiders and other bugs like to build homes back in the axle. It should not be off as much as you noted.
MDT
Old 07-19-2005, 07:42 PM
  #4  
Senior MemberCaptains Club Member
Thread Starter
 
Join Date: Aug 2004
Location: Baha 30 w/ T225 Suzukis
Posts: 684
Likes: 0
Received 1 Like on 1 Post
Default Re: Raymarine DS500X speed reading

I played with the calibration over the weekend. It now reads ~1/2 the gps speed at the low end but ~20%higher at cruise. Also I checked that the wheel does spin freely. I will fool w/it some more next weekend.
Old 07-19-2005, 11:42 PM
  #5  
MDT
Senior MemberCaptains Club MemberPLEDGER
 
Join Date: Feb 2004
Location: Seattle, WA
Posts: 342
Likes: 0
Received 17 Likes on 10 Posts
Default Re: Raymarine DS500X speed reading

Docj,
Something is not right. I was out this weekend trolling for salmon. DS500 was reading .9 mph when the GPS was reading 1.1. At GPS=2.5 mph the DS500 was reading 2.3. On the curise home, I ran the GPS up to 40.0 mph and the DS500 was reading 38.7 mph. I looked at Cal and it is at Default. I would give Raymarine a call.
MDT
Old 07-21-2005, 10:11 AM
  #6  
Admirals ClubCaptains Club Member Admiral's Club Member
THT sponsor
 
Join Date: May 2002
Location: Brookhaven, LI, NY
Posts: 15,772
Likes: 0
Received 31 Likes on 23 Posts
Default Re: Raymarine DS500X speed reading

Follow these steps:

1. Pull the little speed wheel off your transducer. Either unscrew it off, cut it off with plyers or hit with sledgehammer, doesn't really matter.

2. Turn the "Speed" reading on your FF display off.

3. Connect your GPS NMEA outputs to the DS500's NMEA inputs.

4. Turn on the COG data box on the DS500, you now have your true speed over ground(which is ussually more usefull as this is the real speed to be used for calculating how long it will take to get somewhere).

5. Next time you buy a transducer, do NOT buy one with a paddle wheel on it.

6. Tell the FF companies to stop putting speed wheels on there FF's.

7. Lastly, send each and every outboard manufacturer a letter/Email asking them to stop wasting time and money installing a usless speed sensor on their motors also!!

Yea yeah, I know, you need to know the speed of the current when drifting! So look overboard and estimate it!!
Old 07-21-2005, 04:51 PM
  #7  
Senior Member
 
Join Date: Mar 2005
Location: Norfolk, MA
Posts: 126
Likes: 0
Received 0 Likes on 0 Posts
Default Re: Raymarine DS500X speed reading

I couldn't agree with you more Birdman. The spinning wheel is ancient technology and was ok when you had nothing else. Now, many people have GPS units and see how inaccurate those wheels are. There are simply too many variables for them to be truly accurate (mounting position on transom, freely spinning wheel, current, etc.).
Old 07-21-2005, 05:39 PM
  #8  
Senior Member
 
Join Date: Mar 2005
Location:
Posts: 241
Likes: 0
Received 3 Likes on 2 Posts
Default Re: Raymarine DS500X speed reading

If its constantly out by the same percentage it may have had a magnet let go.
Old 07-21-2005, 07:46 PM
  #9  
Senior Member
 
Join Date: Aug 2004
Location: Tennessee
Posts: 1,520
Received 31 Likes on 13 Posts
Default Re: Raymarine DS500X speed reading

I am confused, why even worry about it when you can use your GPS for speed?

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 On
Refbacks are Off


Thread Tools
Search this Thread

Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service - Do Not Sell My Personal Information -

Copyright © 2021 MH Sub I, LLC dba Internet Brands. All rights reserved. Use of this site indicates your consent to the Terms of Use.