ParameterSignalValuesComments
Measurement range1Ethanol   signal0   ppmto 1000 ppm
Hsignal0   ppm to 1000 ppm
Specified rangeEthanol   signal0.3   ppm to 30 ppmThe specifications below are   defined for this measurement range. The specified measurement range covers   the gas concentrations expected in indoor air quality applications.
Hsignal0.5   ppm to 3 ppm
Accuracy3Ethanol   signalsee   Figure 2
   
typ.: 15% of meas. value
Accuracy is defined as
    ( c - cset)/cset
   
with c the measured concentration and cset
   
the concentration set point.
    The concentration
c is   determined by
   
c = C ref    ∙ exp (sref  - sout)   /512)                  
   
with
   
sout: Ethanol/Hydrogen signal output at concentration c
    s
ref:   Ethanol/Hydrogen signal output at 0.5 ppm H2
cref  = 0.4 ppm
Hsignalsee  Figure 3
   
typ.: 10% of meas. value
cref  = 0.5 ppm
Long-term drift3,4Ethanol   signalsee   Figure 4
   
typ.: 1.3% of meas. value
Change of accuracy over time:   Siloxane accelerated lifetime test5
Hsignalsee   Figure 5
   
typ.: 1.3% of meas. value
ResolutionEthanol   signal0.2 % of meas. valueResolution of Ethanol and   Hydrogen signal outputs in relative change of the measured concentration
Hsignal
Sampling frequencyEthanol   signalMax.   40 HzCompare with minimum measurement duration in Table   10
Hsignal


After sale instructions