GB Operating manual – multifunction measuring meter XA1000 / XP200 / XP400 • 08_2015 20
[hPa]
Rel
pressure
Indicates the air pressure corrected to sea
level employing the international
barometric height formula in:
• hectopascal
• millimetres of mercury
• pounds per square inch
The conversion enables that air pressures
can be compared with one another
independent of the sea level.
[mmHg]
[psi]
[hPa]
Sat vap
pres a. ice
Indicates the partial water vapour pressure
under saturation conditions above ice in:
• hectopascal
• pounds per square inch
[psi]
[hPa]
Sat vap
pres a.
water
Indicates the partial water vapour pressure
under saturation conditions above water
in:
• hectopascal
• pounds per square inch
[psi]
[BTU/lb]
Specific
enthalpy
Indicates the state variable of the humid
gas, which is composed of the specific
enthalpies of the mixture components and
based on the mass fraction of the dry gas,
in:
• British Thermal Unit per pound
• Kilojoule per kilogram
[kJ/kg]
[fpm]
Flow speed
Indicates the movement of fluids or gases
as proportion of length to a certain time in:
• feet per minute
• metres per second
[m/s]
[°C]
Dewpoint
temp
Indicates the temperature at which the
current partial water vapour pressure
equals the saturated vapour pressure and
condensation starts in:
• degrees Celsius
• degrees Fahrenheit
[°F]
[°C]
Tempera-
ture
Indicates the measured air temperature in:
• degrees Celsius
• degrees Fahrenheit
[°F]
[%]
Vol frac
w-vapour
Indicates the volume fraction of water
vapour in proportion to the total volume of
humid gas in:
•per cent
• parts per million
[ppm]
[Unit] Measured
value
Meaning
[ft
3
/h]
Flow rate
Indicates the volume calculated from the
measured flow rate and the set area in:
• cubic feet per hour
• cubic feet per minute
• cubic feet per second
• cubic inches per hour
• cubic inches per minute
• cubic inches per second
• litres per minute
• cubic metres per hour
• cubic metres per minute
• cubic metres per second
[ft
3
/min]
[ft
3
/s]
[in
3
/h]
[in
3
/min]
[in
3
/s]
[l/min]
[m
3
/h]
[m
3
/min]
[m
3
/s]
[Unit] Measured
value
Meaning