KM9106 Operators Manual
61
NOx referenced to NO
2
NOx in mg/m
3
= NO in ppm multiplied by 2.05 multiplied by (1 + assumed
NO
2
percentage)
or
NOx in mg/m
3
= NO in mg/m
3
divided by 1.34, multiplied by 2.05 and
multiplied by (1 + assumed NO
2
percentage)
normalising readings
normalised reading = initial reading multiplied by (21 minus the O
2norm
setting) and then divided by (21 minus the actual O
2
reading)
BOTH NO and NO2 sensors Fitted
Working in ppm
NOx = NO + NO
2
normalising readings
ppmn = initial reading in ppm multiplied by (21 minus the O
2norm
setting) and then
divided by (21 minus the actual O
2
reading)
Working in mg/m
3
The user can select how the readings are referenced.
NOx = SUM
NOx = NO
NOx = NO
2
NOx = SUM
NOx in mg/m
3
= NO in ppm multiplied by 1.34 plus NO
2
in ppm multiplied by 2.05
NOx = NO
NOx in mg/m
3
= (NO in ppm plus NO
2
in ppm) multiplied by 1.34
NOx = NO
2
NOx in mg/m3 = (NO in ppm plus NO
2
in ppm) multiplied by 2.05
normalising readings
ppmn = initial reading in ppm multiplied by (21 minus the O
2norm
setting) and then
divided by (21 minus the actual O
2
reading)
mg/m
3
n = initial reading in mg/m
3
multiplied by (21 minus the O
2norm
setting) and
then divided by (21 minus the actual O
2
reading)