Innovate Motorsports LM-1 Digital Air/Fuel Ratio (Lambda) Meter - Manual (Page 4)

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Indicating that the sensor is warming up to its optimum operating temperature. The display shows
what percentage of the temperature is reached and what the battery voltage is that the meter
sees on the power connector. The warm-up period will last for about 30 seconds for a cold
sensor, depending on the sensor type used.
After the sensor is warmed up the meter automatically calibrates the sensor heater controller to
the particular sensor. During this 20-second period the LM-1 collects and calculates sensor
specific data required to quickly reach operating temperature in the future. After the first time use
the meter will use these values to regulate the sensor's temperature. During the heater calibration
the display will show:
Counting down to 0.
Note: When using the Bosch Sensors the LM-1 may perform multiple calibration passes. This is
normal and need not cause concern. When it completes, continue to step 8.
8. Press the Calibration button.
The meter will now calibrate itself by using air as a reference gas with known oxygen content.
After the calibration period is over (2-3 seconds), the instrument is ready to operate.
To recalibrate you need to hold down the Calibration button for a minimum of 2
seconds.
3. Installation
3.1. Mounting the sensor using a Bung or Exhaust Clamp.
Using a bung is the preferred method for mounting the O
2
sensor for both catalytic and
non-catalytic cars.
On
CATALYTIC CONVERTER equipped vehicles:
Bung: Install the oxygen sensor’s bung upstream from the catalytic converter
(a bung and plug is included in the LM-1 kit). Any decent muffler or
exhaust shop can do this for you. The wide-band oxygen sensor is then
installed into the bung to take a reading. (Insert the plug into the bung
when not in use). The bung must be installed in the exhaust pipe at
the side or on top, NOT on the bottom of the exhaust pipe. Best
position is between 10:00 and 2:00 position.
……or………
Exhaust Clamp: You may use the optional Exhaust Clamp to mount the O
2
sensor to the
car’s tail pipe when taking readings from cars with catalytic converters
(see below). However, it is recommended instead to use the bung (as
described above) to give you the most accurate reading. Measuring
after the cat will result in leaner-than-reality readings, depending on the