2
Relative Humidity Accuracy of HTF 3000LF @ 23°C
8
6
4
2
0
0
-2
-4
-6
-8
r e l a t i v e hum i d i t y i n %
10
20
30
40
50
60
70
80
90
100
Chart 2
Modeled Signal output:
Fout = 7314 – 16.79*RH + 0.0886*RH²-0.000358* RH
(Fout in Hz and RH in %)
3
RH = 89,8*10-
10
*Fout
3
- 15,7486*10-
5
*Fout ² +
0,80945*Fout -1009
(Fout in Hz and RH in %)
Modeled Reversed Equation:
Typical response look-up table at 3.3V (Polynomial Reference curve)
RH (%)
Fout
(Hz)
RH (%)
Fout
(Hz)
1
7295
55
6600
5
7230
60
6550
10
7155
65
6500
15
7080
70
6450
20
7010
75
6400
25
6945
80
6355
30
6880
85
6305
35
6820
90
6260
40
6760
95
6210
45
6705
99
6170
50
6650
Output Voltage wave form
Temperature influence on HTF3000LF humidity measurement
For demanding application, temperature coefficient could be compensated over operating temperature
range using following formula :
Rh
corr
= RH + 0.08 * ( T – 25 )
Fout
Corr
= Fout -0,88 * ( T – 25 )
(T in °C, RH in %RH, Fout in Hz
)
HUMIREL HPC077VC
HTF3000LF
July 2006
HUMIREL [ Humirel ]
