CPC 485 - Outdoor Relative Humidity Sensor; Overview; Installation; Mounting The Outdoor RH Sensor

Peripherals Manual Outdoor Relative Humidity Sensor (P/N 203-5760) • 25
Outdoor Relative Humidity Sensor (P/N 203-5760)
Overview
The outdoor relative humidity sensor (P/N 203-5760)
comes in a weather-proof enclosure designed to be mount-
ed on an outside wall.
The sensing element for the outdoor humidity sensor is
a General Eastern bulk resistance type sensor. Table 5 lists
the sensor’s specifications:
Installation
Mounting The Outdoor RH Sensor
The outdoor sensor should be mounted in a sheltered ar-
ea, preferably on the north side of a building under an eave.
This prevents sun-heated air from rising up the side of the
building and affecting the relative humidity at the sensor.
Mount the sensor using the two screw holes shown in
Figure 21.
Wiring
Wire the relative humidity sensor to an input board as
shown in Figure 22.
1. Wire the terminal labelled “P” to one of the
12V supply terminals on the input board
(POWER).
2. Wire the terminal labelled “GND” to the odd-
numbered terminal of an input board point
(GND).
3. Wire the terminal labelled “OUT” to the
even-numbered terminal of an input board
point (SIG).
4. Jumper the terminal labelled “N” to the
“GND” terminal.
Specifications
Operating
Range
10% to 99% RH (noncondensing)
-40° to 170° F (-40 to 76° C)
Storage Tem-
perature
-85° to 158° F
(-65° to 70° C)
Hysteresis
Less than 1% RH
Supply Volt-
age
9.5 to 36 VDC
Signal Out-
puts
0 to 5 volts (0 to 100% RH linear)
Accuracy
Range
±3%
Table 5 - RH Sensor Specifications
When mounting outdoors, point the transmitter down
so that water does not collect in the sensor cavity.
Figure 21 - Outdoor RH Sensor Mounting Dimensions
26509028
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