Connecting a DynoJet Wide Band 2 to an Emerald K3 is very straightforward. You'll need a data acquisition cable (76950114) which is surprisingly optional on some kits.

Here's the wiring:-

WB 2               

violet            K3 analogue-in e.g. AuxIn35

white / violet    K3 pin 30, signal ground
red               3 amp ignition switched live
black             chassis ground
black / white     chassis ground 


Make sure that the pull-up resistor is not enabled for your selected analogue-in. This is done on the Input Channel Configuration screen. The 100 ohm buffer resistor, required for the Innovate LC1, is not required for the DynoJet Wide Band 2.

No configuration or calibration is required, the output is pre calibrated to (volts * 1.6) + 10 = AFR.

In the K3's AFR/Lambda Input Calibration screen set the input source to the analogue-in as used above and enter :-

Input Voltage   AFR

0               10

1               11.6 

2               13.2

3               14.8

4               16.4

5               18

After the ECU has been updated with these settings, it will be possible to read the current AFR from the live adjustments screen. It will also be possible to use the K3's adaptive mapping and closed-loop fueling capabilities.