Specifications and Limits
Measurements and Accuracy
Parameter Units Range Response Accuracy
Measured Time
Air-to-Fuel Ratio AFR 6.0 - 150.0
1
< 150 ms ±0.1 (stoichiometric)
±0.2 (12<AFR<18)
±0.5 (elsewhere)
φ 0.10 - 2.5 < 150 ms ±0.006 (stoichiometric)
±0.008 (0.8<φ<1.2)
±0.009 (elsewhere)
λ 0.4 - 10.0 < 150 ms ±0.006 (stoichiometric)
±0.008 (0.8<λ<1.2)
±0.009 (elsewhere)
%O
2
% 0 - 22% < 150 ms
±0.2% (0<%O
2
<2)
±0.4% (elsewhere)
1
AFR range given for gasoline with an H:C ratio of 1.85. For other fuels, AFR range
depends on the composition (i.e. H:C ratio, O:C ratio, N:C ratio) of the fuel.
Recording Specifications
Sample Selection: Choose one or both AFRs to record. If an AFR sensor is not selected, a
zero (0) is stored for its value, L-R, and AVG.
Sample Size: Up to 5,000 measurements.
Recording Duration: 1.0 second to memory limit (programmable).
Sample Interval (time between samples): 0.01 seconds to 30.0 minutes (programmable).
2
Data Retention: Up to 10 years.
2
The recorded sample interval is programmable in increments of 0.01 seconds.
Specifications and Limits 33
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