Wiring Examples; Relative Humidity Output Calculations; Figure 5 Current Transmitter Wiring Example; Figure 6 Voltage Transmitter Wiring Example (0-1 Vdc And 0-5 Vdc) - Omega HX71 Series User Manual

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6. Wiring Examples

Current output model HX71-MA, HX71-MA-NB (4 to 20 mA)
Voltage output models HX71-V1, HX71-V2, HX71-V1-NB, HX71-V2-

7. Relative Humidity Output Calculations

To calculate % Relative Humidity by measuring the current or voltage
output use the following formulas.
For 4-20 mA output:
% RH = (Current measured in milliamps – 4) ÷ 0.16
EXAMPLE:
For 0 to 1 Vdc output:
% RH = (Voltage measured in volts x 100)
EXAMPLE:
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HX71 SERIES
RH Probe/Transmitter
HX71 CABLE
HX71 CABLE
Figure 5 - Current Transmitter Wiring Example
NB (0 to 1 Vdc or 0 to 5 Vdc)
HX71 CABLE
HX71 CABLE
Figure 6 - Voltage Transmitter Wiring Example
+
BLACK WIRE
RED WIRE
SHIELD WIRE
+
BLACK WIRE
RED WIRE
+
SHIELD WIRE
WHITE WIRE
BLACK WIRE
RED WIRE
SHIELD WIRE
+
WHITE WIRE
BLACK WIRE
RED WIRE
SHIELD WIRE
(11.04 mA – 4) ÷ 0.16 = 44% RH
0.44 Vdc x 100 = 44% RH
PANEL METER
–
50%
–
+
10V
PANEL METER
POWER SUPPLY
–
50%
PANEL METER
–
+
50%
10V –
POWER SUPPLY
–
+
24V
PANEL METER
POWER SUPPLY
50%
–
–
+
24V
POWER SUPPLY