TESTO 350 Maritime V2, Instruction Manual

Page: 45 / 106

5 First steps
45
Parameter Description
Pitot Tube
Factor
The parameter "Pitot tube factor" influences the
measurement of flow speed, volume flow rate
and mass flow. The Pitot factor depends on the
type of Pitot tube used:
Straight Pitot tubes: Factor = 0.67
Prandt’l Pitor tubes (bent): Factor = 1
Humidity The parameter "Humidity" (combustion air
humidity) influences the calculation of qA (flue
gas loss) and flue gas dew point. The factory
setting is 80.0% humidity. To achieve a higher
accuracy, the values can be adjusted to the
actual ambient conditions.
Pressure
absolute
The absolute pressure influences the calculation
of flow speed, volume flow, mass flow and flue
gas dew point. The factory setting is 980mbar. To
achieve a higher accuracy, the values can be
adjusted to the actual ambient conditions.
If a CO
2
-(IR) module is installed, the
absolute pressure value measured there
will automatically be used.
Barometric
pressure
The input of the barometric pressure and
the height above sea level is only
required when no absolute pressure is
available (no CO
2
IR module present).
The barometric pressure influences the
calculation of flow speed, volume flow, mass flow
and flue gas dew point. To achieve a higher
accuracy, the values can be adjusted to the
actual ambient conditions.
This is 1013mbar as an annual average,
regardless of the altitude. Depending on the
current weather, this pressure can fluctuate by
±20mbar around the annual average.
Altitude
The height above sea level influences the
calculation of flow speed, volume flow, mass flow
and flue gas dew point. To achieve a higher
accuracy, the value can be adjusted to the actual
ambient conditions.