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9. RH Measured Vs Output Reading
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: (12.0 mA – 4) ÷ .1684 - 20 = 27.5ºC
For Current output ºF (-4 to 167ºF)
ºF = (Output measured in miliamps – 4) ÷ .0935 - 4 = ºF
EXAMPLE: (12.0 mA – 4) ÷ .0935 - 4 = 81.6ºF
For Voltage output in ºC (-20 to 75ºC)
ºC = (Output measured in volts ÷ .010526) - 20 = ºC
EXAMPLE: (0.50 Vdc ÷ .010526) - 20 = 27.5ºC
For Voltage output ºF (-4 to 167ºF)
ºF = (Output measured in volts ÷ .005848) - 4 = ºF
EXAMPLE: (0.50 Vdc ÷ .005848) - 4 = 81.5ºF
% Relative
Output
Humidity Current (mA) Voltage (Vdc)
5 4 0.8 .05
10 5.6 .10
15 6.4 .15
20 7.2 .20
25 8.0 .25
30 8.8 .30
35 9.6 .35
40 10.4 .40
45 11.2 .45
50 12.0 .50
55 12.8 .55
60 13.6 .60
65 14.4 .65
70 15.2 .70
75 16.0 .75
80 16.8 .80
85 17.6 .85
90 18.4 .90
95 19.2 .95
9
HX93A, HX93DA SERIES
RH/Temperature Transmitter