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Dynon - hall effect sensor issue

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pete.howell(at)gecko-grou
Guest

Posted: Fri Oct 27, 2006 7:58 pm Post subject: Dynon - hall effect sensor issue

Hello,



I have a Dynon EMS-D10 unit in my RV-9A. I am using a hall effect sensor

from a GRT EIS to measure current in the main wire from the battery to the

main bus.  This sensor is supported by Dynon and it works well with one

glitch.  Every 10 seconds (like clockwork), the amps reading shoots up to

+99 amps for 1 second and then drifts back down to the correct value.  In

the 10 seconds that the correct value is displayed, I can vary the load and

see accurate results on the meter.   Any thoughts?  There should be nothing

that is sending a high current spike thru the cable.



I have a message into Dynon, but thought I would try here, too. - Thanks

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enewton57(at)cableone.net
Guest

Posted: Sat Oct 28, 2006 4:52 am Post subject: Dynon - hall effect sensor issue

I don't have an answer but have a question for you- I getting ready to start 

my wiring and was wondering exactly how you mount the Hall effect sensor. 

Thanks for any advise.



Eric Newton



---

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nuckollsr(at)cox.net
Guest

Posted: Mon Oct 30, 2006 7:48 am Post subject: Dynon - hall effect sensor issue

At 10:57 PM 10/27/2006 -0500, you wrote:



 	  Quote: 	
		  

<pete.howell(at)gecko-group.com>



Hello,



I have a Dynon EMS-D10 unit in my RV-9A. I am using a hall effect sensor

from a GRT EIS to measure current in the main wire from the battery to the

main bus.  This sensor is supported by Dynon and it works well with one

glitch.  Every 10 seconds (like clockwork), the amps reading shoots up to

+99 amps for 1 second and then drifts back down to the correct value.  In

the 10 seconds that the correct value is displayed, I can vary the load and

see accurate results on the meter.   Any thoughts?  There should be nothing

that is sending a high current spike thru the cable.



I have a message into Dynon, but thought I would try here, too. - Thanks


	


  I can think of no way to deliberately generate this behavior

  with some variance of wiring. It's almost a sure bet that the little

  critter is suffering from byte-farts.



  Bob . . .

      ---------------------------------------------------------

      < What is so wonderful about scientific truth...is that >

      < the authority which determines whether there can be   >

      < debate or not does not reside in some fraternity of   >

      < scientists; nor is it divine. The authority rests     >

      < with experiment.                                      >

      <                            --Lawrence M. Krauss       >

      ---------------------------------------------------------

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brianpublic2(at)starband.
Guest

Posted: Mon Oct 30, 2006 11:22 am Post subject: Dynon - hall effect sensor issue

I just went through installing my GRT HE sensor for my GRT EIS, so I have

the latest info on this from GRT.



First, a couple questions I had for them about it; you can mount it on or

near metal without it affecting the reading.  For example, you could mount

it to where the wire passes through a panel or bulkhead.   Epoxy and/or

tie-wraps would do this.  Picture a large hole same as ID of sensor,

surrounded by about three 1/4" holes for tie-wraps going through the holes

and around the sensor.



I also had wondered if accuracy of the sensor would be affected by other

large wires near the OUTside of the sensor.  GRT said no.



This is how I did mine:

http://brian76.mystarband.net/avionicsOct06.htm#oct28



I also used heatshrink on the sensor wires and the sensed wire, to help hold

them together and protect them.  I also have 2 crossed tie-wraps holding the

HE sensor ring to the sensed wire.  Mounting options are limited only by

your imagination.

brian



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jgswartout(at)earthlink.n
Guest

Posted: Mon Oct 30, 2006 7:41 pm Post subject: Dynon - hall effect sensor issue

WOW!  Brian!  If you ever give up airplane building I think you have a

future in professional photography!  Those are stunning photos.  Color,

composition, lighting, the works!



John



Do Not Archive



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enewton57(at)cableone.net
Guest

Posted: Tue Oct 31, 2006 4:47 am Post subject: Dynon - hall effect sensor issue

I noticed in John's pictures that he has the solenoids with the rubber 

insulators on the mounting tabs.  There was some discussion recently on this 

group about them.  Was a conclusion ever reached?  I have the same insulated 

mounts on the ones that I purchased from B&C. Should the solenoids be 

grounded?



Eric Newton



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cjensen(at)dts9000.com
Guest

Posted: Tue Oct 31, 2006 5:00 am Post subject: Dynon - hall effect sensor issue

Hey, Brian, how about sharing a little.  John's right about the photos.

Given how much everyone is coming to rely on photos to document their

work and to illustration problems/solutions, good quality pictures are

fun to look at.  There are a bunch of crappy photographers out there

(and we know who we are) that would appreciate a short rundown on the

equipment you use and how you set up to take the photos.  Who knows,

some of the quality might rub off on us.



Chuck Jensen

Do Not Archive. 

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nuckollsr(at)cox.net
Guest

Posted: Tue Oct 31, 2006 5:38 am Post subject: Dynon - hall effect sensor issue

At 06:46 AM 10/31/2006 -0600, you wrote:



 	  Quote: 	
		  

<enewton57(at)cableone.net>



I noticed in John's pictures that he has the solenoids with the rubber 

insulators on the mounting tabs.  There was some discussion recently on 

this group about them.  Was a conclusion ever reached?  I have the same 

insulated mounts on the ones that I purchased from B&C. Should the 

solenoids be grounded?



Eric Newton


	


   It doesn't hurt for the contactors to have insulated

   mounting feed. I'm mystified as to why the booties

   have been added after all these years but the case

   is not part of the electrical circuitry and may be

   insulated either on purpose (booties) or accidently

   (composite airplane).



   Bob . . .

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enewton57(at)cableone.net
Guest

Posted: Tue Oct 31, 2006 3:33 pm Post subject: Dynon - hall effect sensor issue

Ok thanks Bob

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