REFLECTOR: Retract system

[Darrell & Nora Kufalk]

John,

Measuring 2.5 volts is almost always a sign of a problem.  Where are you measuring this 2.5 volts?  Across the coil or at the output side of the contacts?  Making sure you have the black lead of your meter on the ground buss (which is the same location the common wire of your pump motor should be), you should have zero volts at the coil, battery voltage at the input side of the contacts and zero volts at the output side of the contacts.  If your getting something other than zero at the output side of the contacts you may have a partially stuck relay.  Turn the master off, disconnect the wire from the output side of the relay and measure the resistance across the contacts.  You should read infinite ohms or O.L. on most digital meters.  Anything less then than that and you have a bad relay.  Repeat this test with both the up and down relay.

Darrell



  ----- Original Message ----- 
  From: aminetech at bluefrog.com 
  To: Velocity Aircraft Owners and Builders list 
  Sent: Sunday, February 06, 2011 11:28 AM
  Subject: REFLECTOR: Retract system


  Thinking some more about the unintentional retract I had a year ago, I was checking the pump relays.  With the master on, there was battery voltage at the relays.  When I pulled the 30a breaker, the voltage read about 2.5 V  Is that right?  I was expecting 0.  What are the failure modes for a relay?

  John


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


  _______________________________________________
  To change your email address, visit http://www.tvbf.org/mailman/listinfo/reflector

  Visit the gallery!  www.tvbf.org/gallery
  user:pw = tvbf:jamaicangoose
  Check new archives: www.tvbf.org/pipermail
  Check old archives: http://www.tvbf.org/archives/velocity/maillist.html
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://www.tvbf.org/mailman/private/reflector/attachments/20110206/cac0215a/attachment.htm>