TESTO 6681 Profibus, Instruction Manual

Page: 123 / 154

P2A software
- 3.3 Using the software 123
Basic
settings
Explanation
Setting the absolute pressure and selection of the H
2
O
2
evaporation process for the parameter °Ctm).
Absolute
pressure
The absolute pressure is included in the calculation of the
following units:
-
°C
tdA
or °F
tdA
-
g/kg or gr/lb
-
ppm
V
/% vol.
H2O2 process The calculation of the mixture dewpoint unit °Ctm is
dependent upon the type of the evaporation process:
-
with passive vaporization: H
2
O
2
solution evaporates (

via H
2
O
2
water)
-
with active vaporization: H
2
O
2
solution is evaporated
over a heated metal plate (

with evaporated H
2
O
2
)
-
Input field: Entering the weight proportion of the liquid
H
2
O
2
compared to water in %.