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Summary of change:
v3.3_u010262 mainboard home-assembled Second Wbo2 needed some components (even for a mainboard, just request in order comment and gets installed for no extra charge). Installed Resistors: - R28 -100k - R29 -510ohm - R137 -10k - R140 -10k and Q14 FET Pin out: - EC18/1 WBO2_2 Nerst - EC18/7 WBO2_1-2 Pump- - EC18/8 WBO2_2 Pump+ - EC18/9 WBO2_1 Pump+ - EC18/13 WBO2_1 Nerst - EC18/17 WBO2_2 Heater - EC18/18 WBO2_1 Heater == Procedure to calibrate or recalibrate your WBO2 controller built-in to VEMS V3 == * Connect '''pump(-)''' and '''nernst''' with 100 Ohm * connect '''nernst''' and '''pump(+)''' with 100Ohm * Connect a LED with 1k series resistor (between heater out and +12V or +5V) '''Verify Pump-''' My board measure 4.05V '''Measure Pump+ and Adjust Pump-pw-zero ''' * Measure the voltage between '''pump(-)''' and '''pump(+)''' My board measure 0.8 mV '''Verify Heater''' LED lighting. '''Nernst-DC target''' Adjustable 450mV config and log Assuming you could free-air calibrate LSU4 sensors for both channels (after 2nd WBO2 components completed; and enabling 2nd WBO2 in config). Care to write measured Rcal (between Rcal which is not a real sensor-pin and pump+) and calibration value ? * 1st WBO2: LSU4.9 or LSU4.2 Rcal = 84.1 Ohm calibration= 148.7 * 2nd WBO2: LSU4.9 or LSU4.2 Rcal = 109.5 Ohm calibration= 169 * The second sensor can not be calibrated. http://www.vems.hu/filethingie.php?action=list&subdir=VacsiImre
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