
9
Pressure Compensation Equation for F/A
F/A(corrected) = (F/A(measured) + aP) / (1 + bP)
[Equation 3a]
where: F/A(corrected) = the F/A corrected for exhaust pressure.
F/A(measured) = the F/A output by the F/A.
a = 4.30x10
-5
for F/A > 0.0686 (rich).
a = 5.70x10
-5
for F/A
≤
0.0686 (lean).
b = 6.27x10
-4
for F/A > 0.0686 (rich).
b = 8.30x10
-4
for F/A
≤
0.0686 (lean).
P = the exhaust pressure in mmHg above the pressure at which
the sensor was calibrated (using the CAL POT on the F/A
Monitor while the sensor is held in air). Equation 3 is valid
for -152 mmHg < P < 532 mmHg.
Pressure Compensation Equation for Lambda
Lambda(corrected) = (Lambda(measured) + B x P) / (1 + B x P)
[Equation 3b]
where: Lambda(corrected) = the Lambda corrected for exhaust pressure.
Lambda(measured) = the Lambda output by the F/A.
B = 0.000627 for Lambda < 1.0 (rich).
B = 0.000830 for Lambda
≥
1.0 (lean).
P = the exhaust pressure in mmHg above the pressure at which
the sensor was calibrated (using the CAL POT on the
AFM while the sensor is held in air). Equation 3b is valid
for -152 mmHg < P < 532 mmHg.
Pressure Compensation Equation for %O
2
%
O
2
(corrected) = %O
2
(measured) / [1.0 + B x P]
[Equation 3c]
where: %O
2
(corrected) = the %O
2
corrected for exhaust pressure.
%O
2
(measured) = the %O
2
output by the F/A.
B = 0.000830
P = the exhaust pressure in mmHg above the pressure at which
the sensor was calibrated (using the CAL POT on the
AFM while the sensor is held in air). Equation 3c is valid
for -152 mmHg < P < 532 mmHg.
Summary of Contents for F/A1000
Page 1: ...F A1000 F A1500 Fuel Air Ratio Monitor Instruction Manual 02 06 Part Number 1001A 6...
Page 4: ...ii Supplementary Information 15...
Page 19: ...15...
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Page 23: ...19 State Diagram for SMB Communication...
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Page 26: ...Los Altos CA 94023 0040 USA 408 734 3433 Fax 408 734 3432 www ecm co com...