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