Pentair HAFFMANS c-DGM - Page 64

HAFFMANS c-DGM/i-DGM
Page 64 of 78 c-DGM/i-DGM
Conversion of the pressure and temperature units:
Pressure P(bar) P(psi)/14.5
P(bar) P(kg/cm²)/1.02
Temperature T(°C) (T(°F)-32)×5/9
Rule of thumb for the conversion of the CO
2
unit CO
2
(g/L) = 2 * CO
2
(volume)
CO
2
(g/L) = 10 * CO
2
(wright%)
Converting the O
2
units
The c-DGM can be configured for various oxygen units; the conversion formulas used by the c-
DGM are shown below:
100
20,95
saturationair %%
2
⋅=O
10000
%)(
2
⋅= OGASppm
For
T
m
: Temperature in °C
p
atm
: Atmospheric air pressure during the oxygen calibration in bar
(
)
4
m
3
m
2
m
T80,00000159+T0,000322-T0,02755+1,335-48,998 ⋅⋅⋅⋅=
mT
Tc
temp. correction
414,22
32
100
0,2095
013,1
saturationair %
⋅⋅⋅⋅=
Tatm
cp
l
mg
l
mg
LIQppm =)(
ppb
l
mg
l
g
=⋅= 1000
µ
The traditional Uhlig's method DO*Z:
[ ] [ ]








−⋅⋅+⋅⋅⋅
⋅⋅
−
+⋅=
−−
T
TT
VV
V
DOTPO
hsp
hs
lmglmg
)0701,0100,21015,4(3777
)100(1
427
//