_   _ 
( ) ( )
| |_| |
|  _  |
| | | |
(_) (_)
       
       

         
         
  ####   
 ##  ##  
 ######  
 ##      
  #####  
         

      ## 
  #####  
 ##  ##  
 #####   
  ##     
  #####  
 ##  ##  
 #####   

______ 
| ___ \
| |_/ /
| ___ \
| |_/ /
\____/ 
       
       

 #       
 #       
 # ###   
 ##   #  
 #    #  
 ##   #  
 # ###   
         

IMPORTANT: enter the case-INsensitive alphabetic (no numbers) code AND WRITE SOME SHORT summary of changes (below) if you are saving changes. (not required for previewing changes). Wiki-spamming is not tolerated, will be removed, so it does NOT even show up in history. Spammers go away now.


Visit Preferences to set your user name
Summary of change:
'''If a certain VEMS ECU is ordered with "Dual WBO2 requested"''' (option, or order comment), this '''should NOT be needed.''' '''Provided for reference''' (during some debug/diagnostics, or if converting an old device ordered without Dual WBO2). ---- '''2nd WBO2 hardware channel on v3.x'''. Verification of this doc is in progress, use GenBoard/VerThree/Schematic for now. http://downloads.vems.com/doc_images/dual_wbo2_check.png Problem: When I bench test/calibrate: * GOOD: Gnd to pump- is 4V as desired both controller channels * GOOD: pump- to pump+ is -2mV, as desired both controller channels * OOPS: '''pump- to nernst is ~260mV''' and '''I can't get the value up near 450mV''' no matter what I use for wbo2_nernst_dc_target. I notice the '''second heater stops heating when the pump- to nernst goes positive''' (when it normally goes to 450mV). Thoughts on this? I'm using 2 resistors ( pump- '''100 Ohm''' nernst '''100 Ohm''' pump+), as outlined in the Hardware Test page. * Should I use the 100 Ohm resistors on both channels at the same time ? ** please try, and '''measure resistor values (just in case), and pump+ voltage also''' (double of nernts, when measured from pump- as a base) ** although should work to calibrate them individually I'll document the process similar to GenBoard/Manual/WideBandHardwareTest once I understand what I'm missing with this dual wideband testing. First we review your '''actual configuration''' * 2nd WBO2 enabled ? most likely, but please check * please '''provide link''' to vemscfg or vemslog.
Optional: Add document to category:
Wiki formatting: * is Bullet list ** Bullet list subentry ... '''Bold''', ---- is horizontal ruler, <code> preformatted text... </code> See wiki editing HELP for tables and other formatting tips and tricks.