Rh Measured Vs Output Reading; Temperature Output Calculations - Omega Engineering RH/Temperature Transmitter HX93A User Manual

9

9. RH Measured Vs Output Reading

% Relative
Humidity

10. Temperature Output Calculations

To calculate Temperature by measuring the current or voltage output
use the following formulas.
For Current output in ºC (-20 to 75ºC)
ºC = (Output measured in miliamps – 4) ÷ .1684 - 20 = ºC
EXAMPLE:
For Current output ºF (-4 to 167ºF)
ºF = (Output measured in miliamps – 4) ÷ .0935 - 4 = ºF
EXAMPLE:
For Voltage output in ºC (-20 to 75ºC)
ºC = (Output measured in volts ÷ .010526) - 20 = ºC
EXAMPLE:
For Voltage output ºF (-4 to 167ºF)
ºF = (Output measured in volts ÷ .005848) - 4 = ºF
EXAMPLE:
6
HX93A, HX93DA SERIES
RH/Temperature Transmitter
Current (mA)
5 4
10
15
20
25
30
35
40
45
50
55
60
65
70
75
80
85
90
95
Output
Voltage (Vdc)
0.8
5.6
6.4
7.2
8.0
8.8
9.6
10.4
11.2
12.0
12.8
13.6
14.4
15.2
16.0
16.8
17.6
18.4
19.2
(12.0 mA – 4) ÷ .1684 - 20 = 27.5ºC
(12.0 mA – 4) ÷ .0935 - 4 = 81.6ºF
(0.50 Vdc ÷ .010526) - 20 = 27.5ºC
(0.50 Vdc ÷ .005848) - 4 = 81.5ºF
.05
.10
.15
.20
.25
.30
.35
.40
.45
.50
.55
.60
.65
.70
.75
.80
.85
.90
.95