7. Recording other vehicle data with the LM-1
7.1 Overview
The LM-1 has the capability to record other vehicle data from other vehicle sensors while driving
so as to compile a complete log of engine data. The AUX input connector of the LM-1 allows
connecting up to 5 other sensors to the LM-1 whose data values will be recorded. The optional
AUX sensor cable for the LM-1 plugs into the side of the LM-1 instrument and has 5 clips to hook
up to the other sensors.
Never connect the Aux inputs to 12 volt or battery power. Connecting the
inputs to sources that generate greater than 5 volts will result in damage to the
LM-1.
The LM-1 simply records the voltage on each input connection with a resolution of 10 bits (a
precision of 0.00488 Volt). LM-1 will record up to 44 minutes of data from all sensors including
lambda. A new value for each sensor is recorded every 0.08125 seconds (roughly 12
times/second). The recorded data can be later downloaded into a Microsoft Excel spreadsheet or
graphed and analyzed by the included software. To download the recorded data into an Excel
spreadsheet see chapter 9.7, 'Downloading recorded data'. Software to view and analyze
recorded data log files can be downloaded at
www.mustangdyne.com
7.2 Recording
To record data in the LM-1, press the '
Record'
button. The LM-1 will show on its display a
blinking 'R' between the lambda and AFR/O2 display while recording. To stop recording, press
the '
Record'
button again. Each time you start recording a new record ‘Session’ is created. A
total of 44 minutes of data can be recorded in the LM-1. If the internal memory of the LM-1 is full,
the blinking 'R' will not show when starting a recording session. Instead it will show an 'F' for 'Full'
for a few seconds. To erase all recorded data, press and hold the '
Record'
until 'FR' (for flash
reset) shows between lambda and AFR/O2 display. To download the recorded data into an
Excel spreadsheet see chapter 9.7, 'Downloading recorded data'. Software to view and analyze
recorded data log files can be downloaded at
www.mustangdyne.com
8. Remote display of Lambda and/or AFR
In some applications it may be desirable to mount the LM-1 in the engine compartment or under
the dash permanently and monitor the air-fuel data remotely using a dash-mounted instrument.
The LM-1 provides two options for that application.
8.1 Analog Lambda/AFR instrument.
There are many analog lambda/AFR displays on the market. They are essentially voltmeters for a
voltage between 0 and 1 V and measure the analog voltage of a narrow band oxygen sensor.
Some are true analog instruments while others provide a LED bar. Because of the very limited
sensing range of a narrow band sensor they are essentially useless as true AFR meters. LM-1
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