Some Round problems

[Wolf_Tm]

Hi All,
is there anyone that could help me understand what's happening with my Round?

a) the Analog output curve = 5 is supposed (as per document and F1 ) to be 0.68-1.36 and 0-5V:
why mine is inverted, that is to say I'm getting 1.36 @ 0V and 0.68 @ 5V?
Not that this is going to be a big problem, as I'll just have to invert the voltage in a Motec ecu, but just trying to understand where I'm wrong.

b) another problem is that as far as the heater finishes, I get a LAMBDA fluctuating around 19.90 on the Display (yes, lambda) and 58.80 AFR...
what happened??



Thanks

[VEMS]

Hello Wolf_Tm,

Lets start with the basics, did you insert the lambda sensor into the exhaust with running engine ?

If not, than you are most likely seeing o2 reading on the display, your picture implies this also. o2 reading is far outside max displayable lambda range  (on the lean side) gauges lambda and afr therefore rail to the max possible lean.

This will also impact you analog output since its needs active lambda (not o2 reading) to output the correct voltage.

Best regards, Dave

[Wolf_Tm]

Hello Wolf_Tm,

Lets start with the basics, did you insert the lambda sensor into the exhaust with running engine ?

If not, than you are most likely seeing o2 reading on the display, your picture implies this also. o2 reading is far outside max displayable lambda range  (on the lean side) gauges lambda and afr therefore rail to the max possible lean.

This will also impact you analog output since its needs active lambda (not o2 reading) to output the correct voltage.

Best regards, Dave

Ok, thanks.
Really wasn't getting why the lambda after heating was jumping from 1.50 to 19.90 in one big step.

Ok, will see if the analog output (curve 5) will be ok once the lambda will be active...
only strange that curve 4 is correctly working (with lambda not active) giving 4.50 volts (so very lean side in free air) while curve 5 gives 0.09v, so very rich side.. thus my noob question here.

Thanks