25
Specifications and Limits
Measurements and Accuracies
Parameter Range
Response
Time
Accuracy
%O
2
-25 to 25%
1
< 150 ms
4
±0.2
Lambda (
λ
)
0.4 to 25
< 150 ms
4
±0.005
(at
λ
=1)
±0.008 (0.8<
λ
<1.2)
±0.009 (elsewhere)
AFR
6 to 364
2
< 150 ms
4
±0.1 (at 14.6 AFR)
±0.2 (12<AFR<18)
±0.5 (elsewhere)
Equivalence Ratio (
Φ
)
0.04 to 2.5
< 150 ms
4
±0.005
(at
Φ
=1)
±0.008 (0.8<
Φ
<1.2)
±0.009 (elsewhere)
FAR
27 to 1667
2,3
< 150 ms
4
±5 (at 687 FAR)
±14 (555<FAR<833)
Pressure
0 to 517 kPa/75 Psia
< 50ms
5
±0.2
Psia
±1.4 kPa
1
For stoichiometries leaner than Lambda=1, negative %O
2
s are displayed.
This novel convention is sometimes used with lean-burn engines.
2
AFR and FAR range given for a fuel with an H:C ratio of 1.85.
3
FAR x 10000 is displayed. This is the most commonly used way to express FAR.
For example, with an H:C=1.85 fuel, Lambda=1 is FAR=686.8.
4
The response times are affected by averaging filter “alpha lambda” (for Ip1,
%O
2
,
λ
, AFR,
Φ
, FAR).
5
The response times are affected by averaging filter “alpha P” (for P, PVLP, PKPA, PBAR,
PPSI).
Sensor Limits and Specifications
O
2
Sensor
Gas Temperature Range: 0 - 850 °C, 32 - 1562 °F
Maximum Temperature: 950 °C, 1742 °F
Maximum Rate of Temperature Change: 50 °C/s, 122 °F/s
Fuel Composition:
H:C ratio range: 1.00 - 10.00, or Hydrogen (H
2
)
O:C ratio range: 0.00 - 10.00
N:C ratio range: 0.00 - 1.00