10. D6 temperature / humidity sensor FHAD36R
The FHAD36R comprises a fully adjusted digital capacitive sensor which can be ex-
changed at any time without any loss in accuracy. For the purpose of automatic atmo-
spheric pressure compensation an atmospheric pressure sensor is integrated as standard.
The humidity quantities are calculated from the real measurable variables - temperature,
relative humidity, atmospheric pressure - on the basis of formulae as per Dr. Sonntag and
the enhancement factor as per W. Bögel (correction factor ´fw(t,p)´ for real mixed gas sys-
tems). The measuring range and accuracy of this system are thus much greater than with
earlier sensors. The measured atmospheric pressure can also be used in the ALMEMO
®
measuring instrument as reference atmospheric pressure. (see 3.3.1).
10.1 Measuring ranges preset at our factory
Description
Range
Exp. Measuring range Units Resolution
1. Temperature T, t
B-01
DIGI
-2
-100..+200.00
+
°C
0.01 K
2. Rel. Humidity RH, U
w
B-02
DIGI
-1
0... 100.0 %H
0.1 % rH
3. Dew point DT, t
d
B-03
DIGI
-1
-64.8..+100.0 °C
0.1 K
4. Atm. pressure AP, p
B-08
DIGI
-1
300...1100.0 mb
0.1 mb
+
The measuring range depends on the sensor type. (see data sheet)
The new D6 humidity ranges (see 7.2.1) can be partly configured on the device itself;
for this purpose the appropriate ALMEMO
®
standard ranges ´H DT´, ´H AH´, H VP´,
´H En´ must have been programmed accordingly. ´DIGI´ will replace these ranges auto-
matically with the new ones.
Please note that new ranges ´D dv´ or ´D p´ may be lost in this process.
They can then only be restored via the PC.
10.2 Configuration on a PC via the sensor menu
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