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7.7
GENERAL CONFIGURATION CYCLE
To access the parameters in this cycle, you must enter with the device password. The parameters in this cycle allow for selecting units of measure,
adjusting atmospheric pressure, as well as offsets and digital filters for the sensor readings. Also in this cycle, you can enable configuration
parameter protection and change the password.
7.7.1
Unit of Measure
The
RHT
Climate
Transmitter
can operate using the standard measurements in the International System of Measures (SI) or the English System of
Measures (US). The table below shows the measurement unit adopted for each psychrometric property according to the value configured in this parameter.
[nfG
Unit
Units of measure
Default:
S1
International System of Measures
S1
English System of Measures
US
SI
US
Temperature
°C
°F
Relative humidity
% RH
% RH
Dew point temperature
°C
°F
Partial vapor pressure
mbar
psi
Wet bulb temperature
°C
°F
Absolute humidity
g/m³
gr/ft³
Mixture ratio
g/kg
gr/lb
Specific enthalpy
kJ/kg
BTU/lb
Frost point temperature
°C
°F
Table 42
– Units of measure
7.7.2
Atmospheric Pressure
The
RHT
Climate
Transmitter
uses the atmospheric pressure value to calculate some psychrometric properties. The default value used by this
device is 1013 mbar (14.7 psi), but you can refine this information by inserting the value read by another reference instrument. Atmospheric
pressure may vary according to altitude, or due to conditions of the process itself.
SI
US
Min.
Max.
Unit Default Min.
Max.
Unit
Default
[nfG
prEs
Configures the atmospheric pressure value. This value is used
for the calculation of psychrometric properties.
0
10000
mbar
1013
0
145
psi
14.7
Table 43
– Atmospheric pressure
7.7.3
Digital temperature reading filter
A digital filter can be inserted at the temperature value read by the sensor, to reduce undesirable variations. The higher the time value configured in
the digital filter, the slower the temperature reading response will be.
Min.
Max.
Unit
Default
[nfG
FlT
Temperature sensor reading filter
0
300
s
60
Table 44
– Digital temperature reading filter
7.7.4
Digital relative humidity reading filter
A digital filter can be inserted at the relative humidity value read by the sensor, to reduce undesirable variations. The higher the time value
configured in the digital filter, the slower the relative humidity reading response will be.
Min.
Max.
Unit
Default
[nfG
Flr
k
Humidity sensor reading filter
0
300
s
0
Table 45
– Digital relative humidity reading filter
7.7.5
Temperature reading offset
This parameter allows for correcting offset displacement in the temperature reading.
SI
US
Min.
Max.
Unit
Default
Min.
Max.
Unit
Default
[nfG
0Ft
Temperature reading offset
-5
5
°C
0
-9
9
°F
0
Table 46
– Temperature reading offset
