Technical Product Information - Breitband-Lambda
Technical Product Information - Breitband-Lambda
Technical Product Information - Breitband-Lambda
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3. Functional values<br />
<strong>Technical</strong> <strong>Product</strong> <strong>Information</strong><br />
Y 258 E00 015e<br />
Seite/Page 7 von/of 13<br />
Datum/Date 14.6.2005<br />
All data must be regarded as nominal values, measured under the following<br />
conditions:<br />
The sensor is operated with circuit as in section 1.1. The heater power is<br />
closed-loop controlled, so that the nominal sensor internal resistance is<br />
reached. The measurement is done in a lab test bench at pgas=1013hPa.<br />
Changes in the test gas composition, especially of the H2-concentration,<br />
will have an influence on the characteristics of the sensor. These influences<br />
are stronger in rich gas than under lean gas conditions.<br />
3.1 Nominal characteristic line<br />
I P meas / mA<br />
3,000<br />
2,500<br />
2,000<br />
1,500<br />
1,000<br />
0,500<br />
0,000<br />
0 5 10 15 20 25<br />
-0,500<br />
IP meas / mA<br />
1,500<br />
1,000<br />
0,500<br />
-0,500<br />
-1,000<br />
-1,500<br />
-2,000<br />
gas: O 2 in N 2<br />
calibration point<br />
O 2-concentration x O2 / %<br />
0,000<br />
0,70 0,80 0,90 1,00 1,1 1,20 1,30 1,40 1,50 1,60 1,70 1,80 1,90 2,00 2,10 2,20 2,30 2,40 2,50<br />
rich gas mixture of synthetic gas<br />
9%CO, 7%H2, 7%CO2 in N2<br />
lean gas: O 2 in N2<br />
λ = (xO2 / 3 +1) / (1-4.77*xO2 ) for H/C=2<br />
O2-conc. xO2/% 3.0 6.0 8.29 12.0 20.95<br />
λ-value 0.65 0.70 0.80 0.90 1.016 1.18 1.43 1.70 2.42 air<br />
Ip,meas/mA -2.22 -1.82 -1.11 -0.50 0.00 0.33 0.67 0.94 1.38 2.54<br />
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