TESTO 340 - Calculation Formulae

PPooiissoonn iinnddeexx::
ratio = CO: Measured carbon monoxide
value in %
CO
2
: Calculated carbon dioxide
value
EExxcceessss AAiirr ((EExxAAiirr))::
=
( -1 )x 100 21%: Oxygen level of air
O
2
: Measured oxygen level in %
NNiittrrooggeenn ooxxiiddeess::
No NO2 sensor connected:
NO : Measured nitrogen
NO
x
= NO + (NO
2Add.
x NO) monoxide value
NO2 sensor connected: NO
2Add.
: Nitrogen dioxide
NO
x
= NO + NO
2
addition factor
CCaarrbboonn mmoonnooxxiiddee
uunnddiilluutteedd::
uCO = CO x
λλ
CO : measured carbon
monoxide content
λ: Calculated air ratio
FFlluuee ggaass ddeeww ppooiinntt::
DP = F
H20
: Flue gas-specific
water vapour content as
vol.%
P
Abs
: Absolute pressure in
mbar/hPa
FFllooww ssppeeeedd::
v= P
abs
: Absolute pressure
Δ P: Differential pressure
FT: Flue gas temperature
α: Pitot tube factor
AAiirr ffllooww::
V = v x a v: Flow speed
a: Cross-section area
x
αα
575 x
ΔΔ
P x (FT + 273.15)
P
abs
)x 234.175
)- 17.08085
F
H20
x P
Abs
610.78
F
H20
x P
Abs
610.78
ln (
ln (
21%
21% - O
2
CO
CO
2
x 10000
K. Technical data
55