PLX Devices M-300 TE - Manual (Page 5)

Users Guide: iMFD Sensor Module
Version 1.0 May 1, 2008
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(Figure 6)
Compatibility with Other Fuels:
The above graphs assume that the device will be used with gasoline (14.7). The M-300TE is also compatible with the following fuels
when the button knob is turned.
(Reminder: Please kindly wait for 2 seconds after changing the fuel select from one fuel type to another to
properly register new fuel type)
Knob Pos. Fuel Type Stoichiometric Point
0 (“GAS”) Gasoline 14.7
1 (“dSEL”) Diesel 14.6
2 (“E85”) E85 9.76
3 (“Eth”) Ethanol 9.0
4 (“N7th”) Methanol 6.4
5 (“LPG”) LPG 15.5
6 (“CNG”) CNG 17.2
7 (“LdA”) Lambda 1.0
8 (“NULL”) No Function Not Applicable
9 (“NULL”) No Function Not Applicable Illustration only of Knob Pos. ,
DO NOT REMOVE KNOB CAP
If the fuel type is not listed on the table above, to find the new relationship of AFR to output voltage, simply multiply the lambda
value by the specific fuel’s stoichiometric air/fuel ratio.
Example: If your engine uses E20 (20% ethanol / gasoline blend) instead of gasoline. The conversion will be as follows.
1) Divide the AFR value by 14.7 (gasoline) to obtain a lambda value
2) Multiply the lambda value by the stoichiometric point of the E20 (13.5)
Troubleshooting:
1. Upon powering up, the WB analog output should read 2.3V-2.4V with the O2 sensor disconnected.
2. With the O2 sensor connected and exposed to free air, the WB analog output should read starting from 2.35V climbing up to
5.0V
If test #1, #2 pass, your M-300TE is properly working, otherwise, replace the O2 sensor. Replacement sensors are available from
the PLX Online Store.