Galltec+mela DW Manuale - Pagina 9
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Change of physical measuring values and analogue output scaling:
Based on the measured sizes of relative humidity and temperature you can select the below listed derived physical values.
All temperature values can be displayed in °F or °C.
The scaling of the physical values can be freely selected within the limits below.
The sensor is powered via USB for configuration - no power supply unit is required.
Physical values:
Relative humidity
Dew point temperature [°C] / [°F]
Mixing ratio
Enthalpie
Absolute humidity
Wet bulb temperature
Temperature
Air pressure and altitude:
For the following physical values, the air pressure is relevant to obtain a correct reading:
•
Mixing ratio
•
Enthalpie
•
Wet bulb temperature
If a physical value is selected, for which the air pressure is relevant, the input field automatically appears. The air pressure can
be entered either directly or indirectly via the altitude (m above sea level).
Adjustment:
The transmitter can be matched to the measuring task by means of adjustment. To do this, supply the transmitter with power via
the connection terminal and connect to the PC. This can also be done in situ using a portable computer.
There are two types of adjustment:
1. Offset adjustment:
2. Adjustment with reference:
Warning:
see warning concerning galvanic isolation previous page
Information:
The measuring accuracies specified in the technical data refer exclusively to factory adjustments.
The adjustment values in T & RH influence all physical values.
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Scaling ranges
[% RH]
0 %RH .... 100 %RH
-20 °C .... 70 °C
-4 °F .... 158 °F
[g/kg]
0 g/kg .... 100 g/kg
[kJ/kg]
0 kJ/kg .... 80 kJ/kg
[g/m
]
0 g/m
.... 100 g/m
3
3
[°C] / [°F]
-10 °C .... 50 °C
14 °F .... 122 °F
[°C] / [°F]
-100 °C .... 200 °C
-148 °F .... 392 °F
[g/kg]
[kJ/kg]
[°C/°F]
An offset in temperature and / or relative humidity can be entered.
Actual values are adjusted by this offset.
By entering reference measuring values, sensor readings are adjusted to the reference.
3
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