APPENDIX B
B-1
PID Correction Factors
Correction factors for a number of commonly used compounds
for the 10.6 eV PID sensors has been provided. A
comprehensive list of correction factors is available at the RAE
website
www.raesystems.com
, under Technical Note 106.
VOC correction factors are measured relative to isobutylene
gas. All gases are measured at less than 5% relative humidity
and 25°C. These factors may change at higher concentration
levels, different temperatures and/or humidity conditions. The
IAQRAE uses the preset table below in the non-volatile
memory to calculate and display the correct gas reading. Make
sure the name of the measurement gas and calibration gas are
entered correctly. (See Section 4.6.2 Edit Correction Factors) If
the correction factor of the gas is <1.0, the sensitivity to the gas
is higher than that of isobutylene.
Compound
CF at
Compound
CF at
Acetaldehyde
6 Cyclohexanone
0.9
Acetic acid
22
Dichloroethane, 1,2-
NR*
Acetone
1.1 Dichloroethene,
t-1,2-
0.45
Acrylic acid
12
Dichloromethane
NR*
Acrylonitrile
NR* Diesel
Fuel
0.7
Allyl alcohol
2.4
Diethylamine
1
Ammonia
9.7 Dimethylhydrazine,
1,1-
0.8
Benzene
0.53 Epichlorohydrin
8.5
Butadiene
0.85 Ethanol
12
Butane, n-
67
Ethene
10
Butyl acetate, n-
2.6
Ethyl acetate
4.6
Butyl acrylate, n-
1.6
Ethyl acrylate
2.4
Carbon disulfide
1.2
Ethyl benzene
0.52
Cyclohexane
1.4 Ethyl
ether
1.1
*NR = No Response
