Uei-test-instruments KM9106/P Manual de usuario descargar pdf (Pagina 61)

KM9106 Operators Manual

B. NOx CALCULATIONS

ONLY an NO Sensor fitted.

working in ppm: NOx referenced to NO

The user can select the assumed NO

percentage and the O

normalised level

then: NOx in ppm = NO in ppm multiplied by (1 + assumed NO

percentage)

in this setup NOx can only be displayed as NOx = NO

then normalising:

NO in ppmn = NO in ppm multiplied by (21 minus the O

2norm

setting)

and then divided by (21 minus the actual O

reading)

For a worked example assume:

NO is 1000ppm

is 5% of NO

2norm

is set to 3%

actual O2 is zero

NOx in ppm = 1000 x (1 +5/100) =1000 x1.05 = 1050 ppm

NO ppm n = 1000 x (21 - 3)/(21-0) = 1000 x 18 / 21 = 857 ppm n

NOx ppm n = 1050 x 18 / 21 = 900 ppm n

NOx ppm n = 857 x 1.05 = 900 ppm n

working in mg/m

: NOx referenced to NO or NO

The user can select the assumed NO

percentage, the O

reference level and whether

the NOx reading is referenced to NO or NO

referenced to NO

NO in mg/m

= NO in ppm multiplied by 1.34

NOx in mg/m

= NO in mg/m

multiplied by (1 + assumed NO

percentage)

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Uei-test-instruments KM9106/P Manual de usuario Pagina 61