Lufft XA1000 User Manual

19 Operating manual – multifunction measuring meter XA1000 / XP200 / XP400 • 08_2015 GB
Explanation of the measured values
Depending on the measuring mode and used sensor,
the following measured values can be selected to be
displayed in the corresponding measurement units:
[Unit] Measured
value
Meaning
[g/m
3
]
Abs
humidity
Indicates the mass of water vapour in
relation to the volume, in which the humid
gas is contained, in:
• grams per cubic metre
• grains per cubic foot
[gr/ft
3
]
[hPa]
Abs
pressure
Indicates the barometric air pressure. This
is the currently present pressure, based on
an absolute vacuum of "0" and thus
termed absolute pressure. Possible units
are:
• hectopascal
• millimetres of mercury
• pounds per square inch
[mmHg]
[psi]
[°C]
Ice bulb
temp
Indicates the temperature setting in at the
interface of an icy surface and a gas
gushing past in:
• degrees Celsius
• degrees Fahrenheit
[°F]
[°C]
Wet bulb
temp
Indicates the temperature setting in at the
interface of a wet surface and a gas
gushing past in:
• degrees Celsius
• degrees Fahrenheit
[°F]
[°C]
Frost point
temp
Indicates the temperature at which the
current partial water vapour pressure
equals the saturated vapour pressure and
ice starts to form in:
• degrees Celsius
• degrees Fahrenheit
[°F]
[kg/m
3
]
Air density
Indicates the mass of air in proportion to a
certain volume in:
• kilograms per cubic metre
• pounds per cubic foot
[lb/ft
3
]
[g/kg]
Saturation
ratio
Indicates the relative mass ratio of
ambient air saturated with humidity in the
total mass in:
• grams per kilogram
• grains per pound
• parts per million
[gr/lb]
[ppm]
[g/kg]
Mixing ratio
Indicates the mass of water vapour in
proportion to the mass of dry gas in:
• grams per kilogram
• grains per pound
• parts per million
[gr/lb]
[ppm]
[g/kg]
Mass frac
w-vapour
Indicates the mass of water vapour in
proportion to the mass of humid gas in:
• grams per kilogram
• grains per pound
• parts per million
[gr/lb]
[ppm]
[ft
3
/h]
Norm vol
flow
Converts the measured volumetric flow
employing the ideal gas law to standard
conditions (temperature and pressure).
The following standard conditions can be
set:
• DIN 1343: 0 °C/1013.25 mbar
• DIN ISO 2533: 25 °C/1013.25 mbar
• DIN 1945-1: 20 °C/1013.25 mbar
The following units can be selected:
• 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]
[hPa]
Partial vap
pressure
Indicates the partial pressure of water in
its gaseous phase in a given volume of a
gas or gas mixture in:
• hectopascal
• pounds per square inch
[psi]
[%]
Rel
humidity
Indicates the relative humidity as the ratio
of the partial water vapour pressure to the
saturated vapour pressure under
saturation conditions above water in per
cent.
[%]
Rel
humidity
techn.
Indicates the relative humidity as the ratio
of the partial water vapour pressure to the
saturated vapour pressure under
saturation conditions above ice in per cent
(only with temperatures below 0 °C).
[Unit] Measured
value
Meaning

Lufft XA1000 Specifications

General

Brand	Lufft
Model	XA1000
Category	Measuring Instruments
Language	English