Rh/Temperature Calculations - Omega EWS-RH User Manual

RH/Temperature Calculations

To calculate % Relative Humidity by measuring current output in
milliamperes.
Current output - 4
(
To calculate Temperature by measuring current output in milliamperes.
Current output - 4 x 135
(
RH Measured Vs Output Reading
% Relative
Humidity
Current(mA) Voltage(Vdc)
5
10
15
20
25
30
35
40
45
50
55
60
65
70
75
80
85
90
95
Relative Humidity/Temperature Transmitter
)
= % RH
.16
16
Output
4.8 1.2
5.6 1.4
6.4 1.6
7.2 1.8
8 2
8.8 2.2
9.6 2.4
10.4 2.6
11.2 2.8
12 3
12.8 3.2
13.6 3.4
14.4 3.6
15.2 3.8
16 4
16.8 4.2
17.6 4.4
18.4 4.6
19.2 4.8
)
+5 = Temp (°F)
Temperature Measured Vs
Output Reading
Temperature
°C (°F)
-15 (5)
-10 (14)
0 (32)
10 (50)
20 (72)
30 (86)
40 (104)
50 (122)
60 (140)
EWS-RH
Output
Current(mA) Voltage(Vdc)
4
5.07
7.20
9.33
11.94
13.60
15.73
17.87
20
1
1.27
1.80
2.33
2.99
3.40
3.93
4.47
5
5