Blurb From Website

Tech Edge 2J1 Features

• Accuracy within ⁺ _- 0.1 AFR
• Differential WB _lin
• Uses new Bosch LSU 4.2
• WB _lin
• Auto-cal
• NB _sim
• 2 analogue
• RPM input
• PULSE input
• 10.5 to 19.5
• Free logging software

Fitting the Sensor

The Bosch LSU 7200 is classed as a broadband sensor (not as good as a wideband but better than a narrowband). Some info from Bosch can be found in Bosch_The_Modern_Oxygen_Sensor.pdf Bosch_lsu_info.pdf

The first problem is the positioning of the sensor so it has the right running temperature. Techedge state " It’s possible to locate a sensor 300 mm (12”) from a single cylinder runner pipe (such as on an air-cooled motorbike) lsuinstal.pdf

I gave Techedge a call and the 300mm is only a rough guess, which is a good rule of thumb for general purpose. It is more importantant chose a safe spot around that location with a preference to the sensor avoiding damage. THe sensor should not exceed it's 700C operating temperature. Note: The sensor would only be fitted for carb tuning and not used all the time, so a cooler spoy requiring battery power to keep it heated is not an issue.

Lab Notes

First attempt this

Second attempt

Third attempt

Forth attempt

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

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



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











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

Using Output for other devices

wbo2_2j1.pdf

Wide Band Output

-GREEN
-BLUE

Derek can you take a pic of the Dtec diagram so I can check that blue and green are what you use?