Wideband Oxygen Sensor

Blurb From Website

Tech Edge 2J1 Features

• Accuracy within ⁺/_-0.1 AFR over AFR 11 to 17.
• Differential WB_lin wideband 0-5 Volt output.
• Uses new Bosch LSU 4.2 7200 sensor.
• WB_lin configurable with 10 bit accuracy.
• Auto-cal button calibration with sensor in free-air.
• NB_sim narrowband (10 bit configurable) output.
• 2 analogue 0 to 5 Volt inputs sampled at up to 40/sec.
• RPM input from Tacho or ECU for logging.
• PULSE input from VSS sensor or cruise control for logging.
• 10.5 to 19.5 Volt DC operation (up to 3 Amps).
• Free logging software (optional extra feature upgrade available).

Lab Notes

First attempt at using it failed as a standard 5amp power supply. The unit did all the correct flashing but not data came out and the sesnor did not heat up. did not put out the correct current consistancy. Apparently this info was on the website somewhere, I found this which might be handy.

Second attempt failed using a scooter battery, sensor heated up but then unit failed to start (leds dimmed and disappear). Can only assume that I need more power (isn't that always the way :).

Third attempt hooked up with battery and power supply. Yes it made a difference, the unit LED seemed to do what it should and the sensor heated up. However no data was to be seen... need to read up on how to test this.

Forth attempt (Success!) after speaking with techedge I was told the wbconf tool should be able to detect the unit. It did something funny with com1 (led switched off on the unit) so I tried com2... getting some data now :)

What the data looks like

Using WBConf I set the data to ascii using  1.5 ASCII mode   (s0380) command. The resulting information when tracing looks like...

 029B,025C,025C,0000,0307,048A,0C8A,1781,0004,019F,0001,1D39,06E1,00D2,0300,02AC,0000,00BA,03AD

Importing the log file into Excel and doing a "hex3dec" conversion column B looks promising... but isn't, wrong data!
 

Understanding the Data

Decoding the ASCII/Hex version of each frame, without the CRC and frame header information...

From techedge...
 

"I guess many people don't know that we had a version 1.5 unit and the
first LSU unit we sold was the version 2.0 unit. Anyway, the 2.0 frame
to use (as required by TEwbLog and our displays, is described here:

http://wbo2.com/2a0/logger.htm#20frame

use this command to read the frame type you have selected

   g03

it should be e1 but it's probably 84

   e1 = 2v0 Binary Mode, (default mode, used by intelligent displays).
   81 = 2v0 ASCII HEX Mode (Human readable version of above E1).
   84 = Status ASCII HEX Mode, PID and error status information.

http://wbo2.com/2a0/logger.htm#softcontrol"